04-04-2023 дата публикации
Номер: CN115889682A
Автор:
LI KUNPENG,
JIANG ENHUI,
CHEN CHEN,
SHI HUAWEI,
JIANG SIQI,
ZHANG GE,
LI SIHENG,
LI LIKE,
WANG YUANJIAN,
QU SHAOJUN,
MA HUAIBAO,
WANG TING,
GUO XIUJI,
YAN XIAOFEI,
LI XINJIE,
WANG QIANG,
LI JIEYU,
ZHANG LING,
TANG FENGZHEN,
SUN LONGFEI,
WANG XIN,
REN ZHIHUI,
YAN ZHENFENG,
WANG ZILU
Принадлежит:
The invention provides a method for preparing precoated sand by taking Yellow River silt as a main siliceous raw material. The precoated sand comprises the following raw materials in parts by weight: 100 parts of silica sand, 1-4 parts of phenolic resin, 0.02-0.05 part of a silane coupling agent, 1-3 parts of urotropin, 0.05-0.3 part of calcium stearate, 0.05-0.1 part of graphite powder and 3-5 parts of iron sand. According to the method, the characteristic that the Yellow River silt serves as a silicate substance is utilized, the Yellow River silt is subjected to the processes of washing, scrubbing, drying and the like to obtain the silica sand, impurities and feldspar substances attached to the surface of the silt are removed, the silt content of the silt can be reduced to 0.3% or below, and the content of SiO2 in the Yellow River silt is increased to 80% or above. Wherein the silica sand obtained by taking the Yellow River silt as the raw material is low in price, the production cost ...
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