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Method for simultaneously preparing light calcium carbonate and cement raw material from steel slag
The invention discloses a method for simultaneously preparing light calcium carbonate and a cement raw material from steel slag, which comprises the following steps: (1) crushing the steel slag, and adding an acetic acid solution for acidification to prepare acidified steel slag; (2) carrying out microwave activation treatment on the acidified steel slag to prepare activated steel slag; (3) the activated steel slag is subjected to gas quenching and shock cooling, then water is added for dilution until the mass ratio of the leachate to the steel slag is (3-10): 1, the pH is adjusted to be 2.0-2.5, stirring is conducted for 10-90 min, and calcium-containing filtrate and tailings are obtained through filtering; and (4) introducing CO2 gas into the calcium-containing filtrate, stirring at 40-70 DEG C for 30-120 minutes, adjusting the pH value to 7-8, and filtering to obtain light calcium carbonate and filtrate. The method provided by the invention solves the technical problem of resource utilization of steel slag wastes and carbon dioxide.
本发明公开一种钢渣同时制备轻质碳酸钙和水泥原料的方法，包括以下步骤：（1）将钢渣破碎，加入醋酸溶液酸化，制成酸化钢渣；（2）将酸化钢渣进行微波活化处理，制成活化钢渣；（3）将活化钢渣进行气淬骤冷，然后加水稀释至浸出液与钢渣质量比为3～10∶1，并调节pH=2.0～2.5，搅拌10～90 min，过滤获得含钙滤液和尾渣；（4）向含钙滤液中通入CO2气体，40～70℃下搅拌30～120 min，调节pH=7～8，过滤获得轻质碳酸钙和滤液。本发明的方法解决了钢渣废弃物和二氧化碳资源利用的技术难题。
Method for simultaneously preparing light calcium carbonate and cement raw material from steel slag
The invention discloses a method for simultaneously preparing light calcium carbonate and a cement raw material from steel slag, which comprises the following steps: (1) crushing the steel slag, and adding an acetic acid solution for acidification to prepare acidified steel slag; (2) carrying out microwave activation treatment on the acidified steel slag to prepare activated steel slag; (3) the activated steel slag is subjected to gas quenching and shock cooling, then water is added for dilution until the mass ratio of the leachate to the steel slag is (3-10): 1, the pH is adjusted to be 2.0-2.5, stirring is conducted for 10-90 min, and calcium-containing filtrate and tailings are obtained through filtering; and (4) introducing CO2 gas into the calcium-containing filtrate, stirring at 40-70 DEG C for 30-120 minutes, adjusting the pH value to 7-8, and filtering to obtain light calcium carbonate and filtrate. The method provided by the invention solves the technical problem of resource utilization of steel slag wastes and carbon dioxide.
本发明公开一种钢渣同时制备轻质碳酸钙和水泥原料的方法，包括以下步骤：（1）将钢渣破碎，加入醋酸溶液酸化，制成酸化钢渣；（2）将酸化钢渣进行微波活化处理，制成活化钢渣；（3）将活化钢渣进行气淬骤冷，然后加水稀释至浸出液与钢渣质量比为3～10∶1，并调节pH=2.0～2.5，搅拌10～90 min，过滤获得含钙滤液和尾渣；（4）向含钙滤液中通入CO2气体，40～70℃下搅拌30～120 min，调节pH=7～8，过滤获得轻质碳酸钙和滤液。本发明的方法解决了钢渣废弃物和二氧化碳资源利用的技术难题。
Method for simultaneously preparing light calcium carbonate and cement raw material from steel slag
一种钢渣同时制备轻质碳酸钙和水泥原料的方法
ZHAO SUXING (author) / WANG GAIRONG (author) / LI PENGYANG (author) / ZHANG CAIDONG (author) / LI LANJIE (author) / TIAN ZHIQIANG (author)
2024-03-12
Patent
Electronic Resource
Chinese
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