CAJ | 학술논문

　　低品位菱镁矿经煅烧、消化、碳化反应及镁的沉淀反应可制备碳酸钙和氧化镁，沉淀反应产生的氯化钙母液可循环使用，并实现低品位菱镁矿中钙和镁的完全分离。结果表明，低品位菱镁矿950℃煅烧2 h时，其失重率接近理论失重率；煅烧粉末中主要含有MgO和CaO。消化、碳化反应的最佳条件为：反应温度20℃，反应时间1 h，CaCl2过量系数0，CO2流量400 mL/h，相应镁溶出率为95.0%。氧化镁产物中MgO含量为95.6%；碳酸钙产物中MgO和CaO的含量分别为1.24%和53.40%。
　　저품위릉미광경단소、소화、탄화반응급미적침정반응가제비탄산개화양화미，침정반응산생적록화개모액가순배사용，병실현저품위릉미광중개화미적완전분리。결과표명，저품위릉미광950℃단소2 h시，기실중솔접근이론실중솔；단소분말중주요함유MgO화CaO。소화、탄화반응적최가조건위：반응온도20℃，반응시간1 h，CaCl2과량계수0，CO2류량400 mL/h，상응미용출솔위95.0%。양화미산물중MgO함량위95.6%；탄산개산물중MgO화CaO적함량분별위1.24%화53.40%。
The low-grade magnesite was calcined, hydrated and then reacted with CO2 and calcium chloride solution to obtain calcium carbonate and the solution of MgCl2. The precipitation reaction of magnesium was processed to produce MgO, and filtrate of CaCl2 solution can be used circularly. In addition, calcium and magnesium contained in low-grade magnesite was separated. The results showed that the mass loss of the low-grade magnesite calcined at 950℃for 2 h was close to the theoretical mass loss, and the calcined low-grade magnesite mainly contained CaO and MgO. The best conditions of hydrated and carbonized reaction was:20℃for 1 h, the excess coefficient of CaCl2 was 0, and CO2 gas flow of 400 mL/h, under which the dissolved ratio of magnesium was 95.0%. The content of MgO in magnesia was 95.6%, the content of MgO and CaO in calcium carbonate was 1.24%and 53.40%, respectively.