Oxygen top blown converter steel making method

The invention relates to an oxygen top blown converter steel making method, comprising the following steps: the steel material is added to a converter, oxygen is blown into the converter by an oxygen lance and auxiliary materials are added into the furnace by stages in the process of oxygen blowing; wherein the steel material comprises semisteel; lance position of the oxygen lance moves within 1.5-2.2m above molten steel liquid surface in the converter, wherein blowing beginning lance position is 1.95-2.05m, blowing lance position is 1.5-2.2m and catch carbon lance position is 1.7-1.75m; wherein, the auxiliary materials comprise compound slag, lime and high-magnesium lime; in every ton of semisteel, 17-20kg of the compound slag is used, 30-34.5kg of lime is used, 30-34.5kg of high-magnesium lime is used, a total of 43-53 cubic meters of oxygen is blown into the furnace; with the total content of the blown oxygen as a benchmark, the first batch of auxiliary materials are added when the oxygen ...

Oxygen top-blown converter steelmaking method

The invention relates to an oxygen top-blown converter steelmaking method. The method comprises the following steps: adding steel raw materials to a converter; blowing oxygen to the converter through an oxygen lance; and feeding auxiliary materials to the converter in batches in the process of blowing the oxygen, wherein the steel raw materials contain semisteel; the oxygen lance moves within a range of 1.4 to 2.2 meter above the level of molten steel in the converter, namely the blowing position is 1.9 to 2.1 meters, the converting position is 1.5 to 2.2 meters, and the catch-carbon positionis 1.4 to 1.45 meters; the auxiliary materials comprise composite slag, lime and high-magnesium lime with the contents of 14.8 to 16.1 kilograms, 14.8 to 22.2 kilograms and 26.1 to 29.5 kilograms respectively in each half ton of steel; the total of amount of the blown oxygen is 40 to 50 cubic meters; and on the basis of the total of amount of the blown oxygen, the first batch of auxiliary material is ...

Production method of 5754 aluminum alloy blank using cast rolling machine

Oxygen top blown converter steel making method

The invention relates to an oxygen top blown converter steel making method, comprising the following steps: the steel material is added to a converter, oxygen is blown into the converter by an oxygen lance and auxiliary materials are added into the furnace by stages in the process of oxygen blowing; wherein the steel material comprises molten iron containing vanadium and titanium; lance position of the oxygen lance moves within 1.4-2.2m above molten steel liquid surface in the converter, wherein blowing beginning lance position is 1.9-2.1m, blowing lance position is 1.4-1.7m and catch carbon lance position is 1.4-1.5m; wherein the auxiliary materials comprise compound slag, lime and high-magnesium lime; with the total content of the blown oxygen as a benchmark, the first batch of auxiliary materials are added when the oxygen blowing content is 0.5-5%; the method of the invention is suitable for smelting high-level steel grade which has high requirements on P and S in a manner of large quantity ...

Explosion prevention method of molten steel in combined blowing converter

The invention belongs to the production field of combined blowing converter steelmaking, particularly relates to an explosion prevention method of molten steel in a combined blowing converter, which solves the technical problem that when oxygen lance cooling water leaks in the combined blowing converter, the emergent precautionary measure of stopping the supply of gas is taken in order to prevent cooling water from being involved into the molten steel to cause explosion in the converter and give rise to incidents about production safety and personnel safety. The method comprises the following steps: the difference of inflow and outflow of the oxygen lance cooling water is used for determining whether to stop bottom blowing gas supply or not; when the difference is larger than or equal to 20t/h, the oxygen lance automatically lifts and stops supplying oxygen; emergency treatment button is started, bottom blowing oxygen supply is stopped, and the inlet source of the oxygen lance is cut off ...

Slag modifier and preparation method and using method thereof

The invention provides a slag modifier, wherein based on the total weight of the slag modifier, the slag modifier comprises the following components by weight percent: 17 to 35 percent of MgO, 31 to 45 percent of CaO, 10 to 20 percent of SiO2, 6 to 13 percent of reducing agent and 0 to 10 percent of iron oxide, and the reducing agent is one or more of C, Si and SiC. The invention provides a preparation method of the slag modifier and a using method of the slag modifier in a slag splashing protection furnace. The slag modifier can obviously lower the erosion speed to a furnace liner and the content of the iron oxide in furnace slag.

Oxygen top blown converter steel making method

The invention relates to an oxygen top blown converter steel making method, comprising the following steps: the steel material is added to a converter, oxygen is blown into the converter by an oxygen lance and auxiliary materials are added into the furnace by stages in the process of oxygen blowing; wherein the steel material comprises molten iron containing vanadium and titanium; lance position of the oxygen lance moves within 1.4-2.2m above molten steel liquid surface in the converter, wherein blowing beginning lance position is 1.9-2.1m, blowing lance position is 1.4-1.7m and catch carbon lance position is 1.4-1.5m; wherein the auxiliary materials comprise compound slag, lime and high-magnesium lime; with the total content of the blown oxygen as a benchmark, the first batch of auxiliarymaterials are added when the oxygen blowing content is 0.5-5%; the method of the invention is suitable for smelting high-level steel grade which has high requirements on P and S in a manner of largequantity ...

Pulling-straightening equipment for producing continuous cast round billets

The invention provides pulling-straightening equipment for producing continuous cast round billets. The pulling-straightening equipment comprises a first pulling-straightening unit having a plurality of first pulling-straightening machines and a second pulling-straightening unit having one or two second pulling-straightening machines. The pulling-straightening equipment can apply first total pulling-straightening tension to a round billet only through the first pulling-straightening unit so as to obtain the round billet with first ovality. In addition, the pulling-straightening equipment can apply second total pulling-straightening pressure not less than the first total pulling-straightening tension through the first and the second pulling-straightening units, and ensures that the pressure applied to ingot blank by the previous pulling-straightening machine between every two adjacent pulling-straightening machines along the advance direction of the ingot blank is not greater than the pressure ...

Bottom blowing ventilating structure of combined-blowing revolving furnace

The invention discloses a bottom blowing gas-permeable structure of a combined blowing converter in the top and bottom combined blowing technical field and a production method thereof. The structure comprises a gas-permeable brick, and a gas outlet of the gas-permeable brick is overlapped with at least two gas-permeable protective layers formed by mending materials with different substances. The structure greatly decreases the erosive velocity of the gas-permeable brick and prolongs the service life of the gas-permeable brick. The production method for the structure comprises the steps that: a. after the gas outlet of the gas-permeable brick is eroded to form a pit, a mending material is filled into the pit and is solidified to form the first gas-permeable protective layer at the gas outlet of the gas-permeable brick; and b. after the first gas-permeable protective layer is eroded to form a pit, and a mending material with the other substance is filled into the pit and is solidified to ...

Low magnesium type molten iron/semisteel desulfurizing agent and preparation method thereof

The invention relates to a low magnesium type molten iron/semisteel desulfurizing agent and a preparation method thereof, belonging to the metallurgy auxiliary materials field. The low magnesium type molten iron/semisteel desulfurizing agent has good desulfurizing effect and is prepared from following raw materials by weight: 15-30 parts of CaC2, 3-8 parts of Na2CO3, 50-75 parts of CaO, 2-5 parts of CaF2, 2-5 parts of C, 2-5 parts of Mg, and the balance of inevitable impurities. The low magnesium type molten iron/semisteel desulfurizing agent provides good ensurance for the low-sulphur steel, improves the slag state in the molten iron desulphurization process, greatly decreases the molten iron desulphurization iron loss and has the advantages of short molten iron desulphurization time, small slag quantity, low temperature drop, low desulphurization integrated cost, good desulphurization effect and wide applications prospects.

Low magnesium type molten iron/semisteel desulfurizing agent and preparation method thereof

The invention relates to a low magnesium type molten iron/semisteel desulfurizing agent and a preparation method thereof, belonging to the metallurgy auxiliary materials field. The low magnesium type molten iron/semisteel desulfurizing agent has good desulfurizing effect and is prepared from following raw materials by weight: 15-30 parts of CaC2, 3-8 parts of Na2CO3, 50-75 parts of CaO, 2-5 partsof CaF2, 2-5 parts of C, 2-5 parts of Mg, and the balance of inevitable impurities. The low magnesium type molten iron/semisteel desulfurizing agent provides good ensurance for the low-sulphur steel,improves the slag state in the molten iron desulphurization process, greatly decreases the molten iron desulphurization iron loss and has the advantages of short molten iron desulphurization time, small slag quantity, low temperature drop, low desulphurization integrated cost, good desulphurization effect and wide applications prospects.

Composition for slag formation and preparation and use method thereof

The invention provides a composition for slag formation, which comprises the following components based on the total weight of the composition: 45-65wt% of CaO, 10-20wt% of SiO2, 1-5wt% of MnO, 9-25wt% of MgO and 1.5-5wt% of Al2O3. The invention also provides a preparation method and a use method of the composition. The composition for slag formation provided by the invention can promote slagging in the early stage of smelting semisteel, shorten the slag formation time, and obviously remove phosphorus elements. By adopting the composition for slag formation of the invention for smelting the semisteel, the process is simple, the energy consumption is low, the effect of reducing phosphorus is obvious, the phosphorus content in molten steel is lower than 0.007wt%, and consumption of the semisteel is small when the same amount of steel is obtained by smelting.

Slag modifier and preparation method and using method thereof

The invention provides a slag modifier, wherein based on the total weight of the slag modifier, the slag modifier comprises the following components by weight percent: 17 to 35 percent of MgO, 31 to 45 percent of CaO, 10 to 20 percent of SiO2, 6 to 13 percent of reducing agent and 0 to 10 percent of iron oxide, and the reducing agent is one or more of C, Si and SiC. The invention provides a preparation method of the slag modifier and a using method of the slag modifier in a slag splashing protection furnace. The slag modifier can obviously lower the erosion speed to a furnace liner and the content of the iron oxide in furnace slag.

Oxygen top blown converter steel making method

The invention relates to an oxygen top blown converter steel making method, comprising the following steps: the steel material is added to a converter, oxygen is blown into the converter by an oxygen lance and auxiliary materials are added into the furnace by stages; the method is characterized in that steel material comprises molten iron containing vanadium and titanium; lance position of the oxygen lance moves within 1.35-2.2m above molten steel liquid surface in the converter, wherein blowing beginning lance position is 1.9-2.1m, blowing lance position is 1.4-1.8m and catch carbon lance position is 1.35-1.45m; wherein the auxiliary materials comprise compound slag, lime and high-magnesium lime relative to every ton of molten iron containing vanadium and titanium, the first batch of auxiliary materials are added when the oxygen blowing content is 0.5-3.5%; the method of the invention is suitable for smelting low-level steel grade which has undemanding requirements on P and S by vanadium-and-titanium-containing ...

Composition for slag formation and preparation and use method thereof

The invention provides a composition for slag formation, which comprises the following components based on the total weight of the composition: 45-65wt% of CaO, 10-20wt% of SiO2, 1-5wt% of MnO, 9-25wt% of MgO and 1.5-5wt% of Al2O3. The invention also provides a preparation method and a use method of the composition. The composition for slag formation provided by the invention can promote slaggingin the early stage of smelting semisteel, shorten the slag formation time, and obviously remove phosphorus elements. By adopting the composition for slag formation of the invention for smelting the semisteel, the process is simple, the energy consumption is low, the effect of reducing phosphorus is obvious, the phosphorus content in molten steel is lower than 0.007wt%, and consumption of the semisteel is small when the same amount of steel is obtained by smelting.

Oxygen top blown converter steel making method

The invention relates to an oxygen top blown converter steel making method, comprising the following steps: the steel material is added to a converter, oxygen is blown into the converter by an oxygen lance and auxiliary materials are added into the furnace by stages in the process of oxygen blowing; wherein the steel material comprises semisteel; lance position of the oxygen lance moves within 1.5-2.2m above molten steel liquid surface in the converter, wherein blowing beginning lance position is 1.95-2.05m, blowing lance position is 1.5-2.2m and catch carbon lance position is 1.7-1.75m; wherein, the auxiliary materials comprise compound slag, lime and high-magnesium lime; in every ton of semisteel, 17-20kg of the compound slag is used, 30-34.5kg of lime is used, 30-34.5kg of high-magnesium lime is used, a total of 43-53 cubic meters of oxygen is blown into the furnace; with the total content of the blown oxygen as a benchmark, the first batch of auxiliary materials are added when theoxygen ...

Maintenance method of gas permeable brick of vanadium extraction converter and production method of converter vanadium extraction

The invention provides a maintenance method of gas permeable bricks of a vanadium extraction converter. The method comprises the steps of repairing spray repair furnace charge to the erosion positionsof the gas bricks and then sintering the spray repair furnace charge. The invention also provides a production method of a converter vanadium extraction, which comprises carrying out vanadium extraction and the maintenance on the converter. The method of the maintenance of the converter comprises the maintenance of the gas permeable bricks of the converter, which comprises the deducting and repairing of the gas permeable bricks of the converter, wherein the maintenance of the gas permeable bricks of the converter also comprises the spray repairing of the gas permeable bricks of the converter,and the method of the spray repairing of the gas permeable bricks of the converter is the maintenance of the gas permeable bricks of the converter. The method can promote the converter to keep running in ...

Slagging agent, preparation method and use method thereof

The invention provides a slagging agent comprising the components by using the total weight of the slagging agent as a standard in percentage by weight: 40-60 percent of SiO2, 8-20 percent of CaO, 4-10 percent of MnO and 12-30 percent of ferriferous oxide. The invention also provides a preparation method of the slagging agent and a use method of the slagging agent in a steel-making smelting process. Compared with the supplied slagging agent in the prior art, the slagging agent adopted to slag has the advantages that the early slag forming speed is obviously increased by 150 seconds, and the dephosphorizing efficiency is increased by about 7 percent. The slagging agent can further recover iron in mud to reduce the consumption of iron materials, and moreover, because of comprising proper MnO, the slagging agent is beneficial for subsequent slag splash and stove protection.

Oxygen top blown converter steel making method

The invention relates to an oxygen top blown converter steel making method, comprising the following steps: the steel material is added to a converter, oxygen is blown into the converter by an oxygen lance and auxiliary materials are added into the furnace by stages; the method is characterized in that steel material comprises molten iron containing vanadium and titanium; lance position of the oxygen lance moves within 1.35-2.2m above molten steel liquid surface in the converter, wherein blowing beginning lance position is 1.9-2.1m, blowing lance position is 1.4-1.8m and catch carbon lance position is 1.35-1.45m; wherein the auxiliary materials comprise compound slag, lime and high-magnesium lime relative to every ton of molten iron containing vanadium and titanium, the first batch of auxiliary materials are added when the oxygen blowing content is 0.5-3.5%; the method of the invention is suitable for smelting low-level steel grade which has undemanding requirements on P and S by vanadium-and-titanium-containing ...

Heat treatment method for use in processing technology for production of 5XXX series aluminium plate by using cast-rolling stock

Oxygen top-blown converter steelmaking method

The invention relates to an oxygen top-blown converter steelmaking method. The method comprises the following steps: adding steel raw materials to a converter; blowing oxygen to the converter through an oxygen lance; and feeding auxiliary materials to the converter in batches in the process of blowing the oxygen, wherein the steel raw materials contain semisteel; the oxygen lance moves within a range of 1.4 to 2.2 meter above the level of molten steel in the converter, namely the blowing position is 1.9 to 2.1 meters, the converting position is 1.5 to 2.2 meters, and the catch-carbon position is 1.4 to 1.45 meters; the auxiliary materials comprise composite slag, lime and high-magnesium lime with the contents of 14.8 to 16.1 kilograms, 14.8 to 22.2 kilograms and 26.1 to 29.5 kilograms respectively in each half ton of steel; the total of amount of the blown oxygen is 40 to 50 cubic meters; and on the basis of the total of amount of the blown oxygen, the first batch of auxiliary material ...

Bottom blowing ventilating structure of combined-blowing revolving furnace

The invention discloses a bottom blowing gas-permeable structure of a combined blowing converter in the top and bottom combined blowing technical field and a production method thereof. The structure comprises a gas-permeable brick, and a gas outlet of the gas-permeable brick is overlapped with at least two gas-permeable protective layers formed by mending materials with different substances. The structure greatly decreases the erosive velocity of the gas-permeable brick and prolongs the service life of the gas-permeable brick. The production method for the structure comprises the steps that: a. after the gas outlet of the gas-permeable brick is eroded to form a pit, a mending material is filled into the pit and is solidified to form the first gas-permeable protective layer at the gas outlet of the gas-permeable brick; and b. after the first gas-permeable protective layer is eroded to form a pit, and a mending material with the other substance is filled into the pit and is solidified to ...

Slagging agent, preparation method and use method thereof

The invention provides a slagging agent comprising the components by using the total weight of the slagging agent as a standard in percentage by weight: 40-60 percent of SiO2, 8-20 percent of CaO, 4-10 percent of MnO and 12-30 percent of ferriferous oxide. The invention also provides a preparation method of the slagging agent and a use method of the slagging agent in a steel-making smelting process. Compared with the supplied slagging agent in the prior art, the slagging agent adopted to slag has the advantages that the early slag forming speed is obviously increased by 150 seconds, and the dephosphorizing efficiency is increased by about 7 percent. The slagging agent can further recover iron in mud to reduce the consumption of iron materials, and moreover, because of comprising proper MnO, the slagging agent is beneficial for subsequent slag splash and stove protection.

Method for lowering converter bottom

The invention provides a method for lowering converter bottom, comprising the following steps: (1) pouring out final slag in a converter after tapping of molten steel; (2) adding semisteel and/or molten iron, fluorite and compound fluxing medium into the converter, and using oxygen to carry out slide blowing; (3) adding high-magnesium lime and/or final slag regulator to the converter, and using nitrogen for blowing; (4) pouring out slag in the converter. The method of the invention features easy operation and not only ensures furnace protection effect of splashed slag but also ensures the effect of combined blowing; regular use of the method of the invention for maintaining the converter can maintain stable and normal operation thereof.

Semi-steel steelmaking method

The invention discloses a semi-steel steelmaking method, wherein the method comprises the steps of: adding raw materials into a steel making furnace, blowing oxygen into the furnace to obtain molten steel and slag; the raw materials comprises raw steel, lime, high-magnesium lime and acid composite slag; the raw steel contains semi-steel after vanadium extraction; the addition of the acid composite slag meets the following formula: W (acid composite slag) is equal to (( (CaO (lime) plus CaO (high-magnesium lime) minus SiO2 (oxidized semi-steel) multiplied by R) divided by R ) divided by SiO2% (acid composite slag) ) multiplied by K, wherein W acid composite slag refers to the addition of the acid composite slag, CaO lime refers to the quantity of CaO brought in by the lime, CaO high-magnesium lime refers to quantity of CaO brought in by the high-magnesium lime, SiO2 oxidized semi-steel refers to the quantity of SiO2 converted from the quantity of Si element in the semi-steel, R refers to ...

Rail steel and preparation method thereof

The invention relates to a rail steel and a preparation method thereof. The rail steel contains the following components by taking the total weight of the rail steel as reference 0.65-0.75wt% of C, 0.80-1.30wt% of Mn, 0.10-0.50wt% of Si, less than or equal to 0.03wt% of V, less than or equal to 0.025wt% of P, 0.008-0.025wt% of S, less than or equal to 0.004wt% of Al, the balance of iron. Cleanliness of the rail steel is indicated by the grade of T(O) content, (H) content and contents of nonmetallic inclusions A, B, C and D, wherein total oxygen content T(O) in the rail steel is less than or equal to 0.0020wt%, (H) content is less than or equal to 0.0002wt%, and according to inclusion rating standard GB/T10561-2005, the inclusion A in the rail steel is less than or equal to 1.5 grade, the inclusion B is less than or equal to 1.0 grade, inclusion C is less than or equal to 1.0 grade, and the inclusion D is less than or equal to 1.0 grade. The rail steel for high speed railway provided by ...

Method for lowering converter bottom

The invention provides a method for lowering converter bottom, comprising the following steps: (1) pouring out final slag in a converter after tapping of molten steel; (2) adding semisteel and/or molten iron, fluorite and compound fluxing medium into the converter, and using oxygen to carry out slide blowing; (3) adding high-magnesium lime and/or final slag regulator to the converter, and using nitrogen for blowing; (4) pouring out slag in the converter. The method of the invention features easy operation and not only ensures furnace protection effect of splashed slag but also ensures the effect of combined blowing; regular use of the method of the invention for maintaining the converter can maintain stable and normal operation thereof.

Semi-steel steelmaking method

The invention discloses a semi-steel steelmaking method, wherein the method comprises the steps of: adding raw materials into a steel making furnace, blowing oxygen into the furnace to obtain molten steel and slag; the raw materials comprises raw steel, lime, high-magnesium lime and acid composite slag; the raw steel contains semi-steel after vanadium extraction; the addition of the acid compositeslag meets the following formula: W (acid composite slag) is equal to (( (CaO (lime) plus CaO (high-magnesium lime) minus SiO2 (oxidized semi-steel) multiplied by R) divided by R ) divided by SiO2% (acid composite slag) ) multiplied by K, wherein W acid composite slag refers to the addition of the acid composite slag, CaO lime refers to the quantity of CaO brought in by the lime, CaO high-magnesium lime refers to quantity of CaO brought in by the high-magnesium lime, SiO2 oxidized semi-steel refers to the quantity of SiO2 converted from the quantity of Si element in the semi-steel, R refers to ...

Semisteel converter steelmaking method

The invention relates to a semisteel converter steelmaking method, which comprises the following steps of: adding semisteel and a slag former into a converter successively and performing oxygen blowing and end point control. The method is characterized by also comprising a step of adding manganese ore into the converter. The method does not influence the steel production process and production organization and ensures dephosphorization and decarburization effects of converter steelmaking and the increase of the manganese content of end-point molten steel. The method has the characteristics of low energy consumption, simple operation, easy control and the like, reduces the using amount of ferromanganese during rear alloying and the production cost of the converter steelmaking, and saves energy and reduces energy consumption in the steelmaking process.

Preparation method of rail steel

The invention relates to a rail steel and a preparation method thereof. The rail steel contains the following components by taking the total weight of the rail steel as reference 0.65-0.75wt% of C, 0.80-1.30wt% of Mn, 0.10-0.50wt% of Si, less than or equal to 0.03wt% of V, less than or equal to 0.025wt% of P, 0.008-0.025wt% of S, less than or equal to 0.004wt% of Al, the balance of iron. Cleanliness of the rail steel is indicated by the grade of T(O) content, (H) content and contents of nonmetallic inclusions A, B, C and D, wherein total oxygen content T(O) in the rail steel is less than or equal to 0.0020wt%, (H) content is less than or equal to 0.0002wt%, and according to inclusion rating standard GB/T10561-2005, the inclusion A in the rail steel is less than or equal to 1.5 grade, the inclusion B is less than or equal to 1.0 grade, inclusion C is less than or equal to 1.0 grade, and the inclusion D is less than or equal to 1.0 grade. The rail steel for high speed railway provided by ...

Calcium based molten iron/semisteel desulfurizing agent and preparation method thereof

The invention relates to a calcium based molten iron/semisteel desulfurizing agent and a preparation method thereof, belonging to the metallurgy auxiliary materials field. The calcium based molten iron/semisteel desulfurizing agent has good desulfurizing effect and is prepared from following raw materials by weight: 10-30 parts of CaC2, 3-10 parts of Na2CO3, 55-80 parts of CaO, 2-5 parts of CaF2, 2-5 parts of C, and the balance of inevitable impurities. The calcium based molten iron/semisteel desulfurizing agent provides good ensurance for the low-sulphur steel, improves the slag state in the molten iron desulphurization process, greatly decreases the molten iron desulphurization iron loss and has the advantages of short molten iron desulphurization time, small slag quantity, low temperature drop, low desulphurization integrated cost, good desulphurization effect and wide applications prospects.

Protective cover for bicycle wheel

The utility model discloses a protecting cover for a bicycle wheel. A protecting covers (2) is arranged at both sides of a wheel shaft member (1) and a bicycle spoke (6), a central hole is matched with the wheel shaft member (1), the outer margin is attached with the inner side of a bicycle rim (4), and the wheel shaft member (1) and the bicycle spoke (6) are arranged in the formed closed space. The contact of dust, mud, water content and other harmful particles and the wheel shaft member (1) and the bicycle spoke (6) can be prevented effectively, a bicycle is protected, and meanwhile, the cleaning work of the bicycle becomes simple and easy.

Pulling-straightening equipment for producing continuous cast round billets

The invention provides pulling-straightening equipment for producing continuous cast round billets. The pulling-straightening equipment comprises a first pulling-straightening unit having a plurality of first pulling-straightening machines and a second pulling-straightening unit having one or two second pulling-straightening machines. The pulling-straightening equipment can apply first total pulling-straightening tension to a round billet only through the first pulling-straightening unit so as to obtain the round billet with first ovality. In addition, the pulling-straightening equipment can apply second total pulling-straightening pressure not less than the first total pulling-straightening tension through the first and the second pulling-straightening units, and ensures that the pressure applied to ingot blank by the previous pulling-straightening machine between every two adjacent pulling-straightening machines along the advance direction of the ingot blank is not greater than the pressure ...

Maintenance method of gas permeable brick of vanadium extraction converter and production method of converter vanadium extraction

The invention provides a maintenance method of gas permeable bricks of a vanadium extraction converter. The method comprises the steps of repairing spray repair furnace charge to the erosion positions of the gas bricks and then sintering the spray repair furnace charge. The invention also provides a production method of a converter vanadium extraction, which comprises carrying out vanadium extraction and the maintenance on the converter. The method of the maintenance of the converter comprises the maintenance of the gas permeable bricks of the converter, which comprises the deducting and repairing of the gas permeable bricks of the converter, wherein the maintenance of the gas permeable bricks of the converter also comprises the spray repairing of the gas permeable bricks of the converter, and the method of the spray repairing of the gas permeable bricks of the converter is the maintenance of the gas permeable bricks of the converter. The method can promote the converter to keep running ...