(1. 內(nèi)蒙古工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，呼和浩特 010051；
2. 東北大學(xué) 材料與冶金學(xué)院，沈陽 110004)
摘 要: 采用富硼渣硫酸法處理富硼渣，通過單因素試驗和正交試驗確定了富硼渣硫酸浸出的最佳試驗條件。針對硫酸浸出液開發(fā)了先高溫結(jié)晶制取一水硫酸鎂再低溫結(jié)晶制備硼酸工藝。結(jié)果表明：浸出溫度為99 ℃，酸用量為理論用量的95%，浸出液固比為6:1，浸出時間為90 min時，B浸出率為98.76%，Mg浸出率達到74.32%。通過灰色關(guān)聯(lián)分析理論對Mg的浸出率進行預(yù)測，預(yù)測值為75.06%，預(yù)測結(jié)果和實驗結(jié)果具有較好的一致性。制得的一水硫酸鎂純度為95.42%，硼酸的純度達到99.27%。
關(guān)鍵字: 富硼渣；硫酸浸出；硼酸；一水硫酸鎂；浸出率
（1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract:The sulfuric acid was used to decomposing boron-rich slag. The best test conditions of the boron-rich slag sulfuric acid leaching were determined by single factor and orthogonal experiments. The high temperature crystallization preparation of magnesium sulfate monohydrate and low temperature crystallization preparation boric acid were developed by sulfuric acid leaching solution. The results show that the optimum parameters are leaching temperature of 99 ℃, the sulfuric acid theoretical of 95% dosage, leaching time of 90 min and leaching liquid to solid ratio of 6:1. Under these conditions, the leaching rates of B and Mg are 98.76% and 74.32%, respectively. The leaching rate of Mg predicted by gray relational theory and the predictive value is 75.06%. A good agreement between the actual and predicted results is obtained. The purity of magnesium sulfate monohydrate and boric acid obtained by this method are 95.42% and 99.27%, respectively.
Key words: B-rich slag; sulfuric acid leaching; boric acid; magnesium sulfate monohydrate; leaching rate
