Continuous casting method

The invention discloses a continuous casting method. The method performs drawing by using a drawing and straightening unit comprising a plurality of drawing and straightening machines, wherein the plurality of drawing and straightening machines are arranged so that a continuous casting billet successfully passes through each drawing and straightening machine. The method comprises the following steps of: keeping a dummy bar pressure pressed downwards through the drawing and straightening machine when a billet head of the continuous casting billet enters every one of the plurality of drawing and straightening machines; and converting the pressure applied by the first drawing and straightening machine in the plurality of drawing and straightening machines into a first hot billet pressure smaller than the dummy bar pressure through the dummy bar pressure before the billet head enters the last drawing and straightening machine in the plurality of drawing and straightening machines.

Method for recovering vanadium pentoxide from molten iron containing vanadium

The invention relates to a method for recovering vanadium pentoxide from molten iron containing vanadium. The method comprises the steps of oxidizing the vanadium in the molten iron into the vanadiumpentoxide, and separating vanadium slag; and the method also comprises the step of contacting the molten iron with a carbon material containing simple substance carbon after oxidizing the vanadium inthe molten iron into the vanadium pentoxide and before separating the vanadium slag. The method can significantly improve the concentration of the vanadium pentoxide in the vanadium slag and the recovery rate of the vanadium pentoxide.

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.

Continuous casting method

The invention discloses a continuous casting method. The method performs drawing by using a drawing and straightening unit comprising a plurality of drawing and straightening machines, wherein the plurality of drawing and straightening machines are arranged so that a continuous casting billet successfully passes through each drawing and straightening machine. The method comprises the following steps of: keeping a dummy bar pressure pressed downwards through the drawing and straightening machine when a billet head of the continuous casting billet enters every one of the plurality of drawing and straightening machines; and converting the pressure applied by the first drawing and straightening machine in the plurality of drawing and straightening machines into a first hot billet pressure smaller than the dummy bar pressure through the dummy bar pressure before the billet head enters the last drawing and straightening machine in the plurality of drawing and straightening machines.

Fettling method for vanadium extracting converter

The invention provides a fettling method for a vanadium extracting converter. The method comprises the following steps: fettling a fettling material at the eroded part of the vanadium extracting converter in a buckling way; and then, carrying out the sintering process in which the fettling material is heated by the vanadium extracting converter and a coal-oxygen burner. The fettling method of the invention can reduce the fettling time, keep the converter in a good operating condition for a long time and reduce the frequency of production halt caused by the maintenance of the converter, thereby improving the production efficiency and reducing the cost.

Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization

Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization

The present invention is desulfurizing and slag regulating agent for molten vanadium-titanium iron, and belongs to the field of ferrous metallurgy. The desulfurizing and slag regulating agent consists of CaO 55-70 weight portions, SiO2 7-15 weight portions, expandable graphite 1-6 weight portions, MnO 2-10 weight portions, MgO 2-10 weight portions, CaC2 1-20 weight portions, CaF2 1-4 weight portions and Al2O3 1-5 weight portions. The desulfurizing and slag regulating agent of the present invention has high desulfurizing slag eliminating rate, capacity of reducing the sulfur content from 0.035-0.120 % to about 0.005 %, lowered iron loss and broad application foreground.

Molten steel deoxidizing and carbureting method and steelmaking method

The invention relates to a molten steel deoxidizing and carbureting method which comprises the step of adding a carburant and a deoxidizer to a steel ladle in sequence in the process of leading molten steel obtained by smelting to enter the steel ladle through steel tapping. The invention further provides a steelmaking method which comprises the following steps: tapping the molten steel obtained by smelting to the steel ladle, deoxidizing and carbureting the molten steel during the steel tapping process and then externally refining the molten steel after being deoxidized and carbureted, wherein the method for deoxidizing and carbureting the molten steel is the molten steel deoxidizing and carbureting method. In the deoxidizing and carbureting method, the carburant is firstly added and then reacted with oxygen in the molten steel to generate spontaneous mixing gas while the content of carbon is adjusted. Later, the added deoxidizer can be completely and uniformly mixed with the molten steel ...

Secondary cooling device used in continuous casting process

The invention discloses a secondary cooling device used in continuous casting process, comprising a plurality of cooling sections, wherein each cooling section comprises a cooling water pipe and a nozzle connected to the cooling water pipe, the distances between the nozzles in the cooling sections are different, the nozzles at both ends of each cooling section are obliquely arranged to a transition area, wherein the transition area is between two adjacent cooling sections. The secondary cooling device on the basis of the invention can simultaneously avoid the problems of insufficient cooling intensity of the front parts of the cooling sections, supercooling of the back parts of the cooling sections and insufficient cooling of the transition areas.