论文部分内容阅读
将柿竹园铅锌矿破碎球磨,进行煅烧、除硫,经浓盐酸酸洗、过滤,实现了有价元素与其他元素的分离,通过控制不同的pH值,分别得到铁和铅锌的氢氧化物,再往滤液中加入NH4HCO3,钙以CaCO3的形式沉淀出来,将所得的碳酸钙经硝酸溶解后,加入适量的硅酸钠,并用聚乙二醇作为分散剂,制得硅酸钙粉体。并对制备的溶液和滤渣进行了表征,研究了焙烧物料的数量和金属的离子价态对产物纯度和回收率的影响。本试验通过控制适宜的工艺条件,使铁和钙的浸出率分别达到83.2%和67.7%,工艺简便,成本较低,实现了矿产资源的综合利用。
The Shizhuyuan lead-zinc mine is crushed and ball-milled for calcination and sulfur removal. The concentrated hydrochloric acid pickling and filtration are carried out to separate the valuable elements from other elements. By controlling different pH values, hydrogen and iron Oxide, and then to the filtrate was added NH4HCO3, calcium precipitated in the form of CaCO3, the resulting calcium carbonate dissolved by nitric acid, adding an appropriate amount of sodium silicate and polyethylene glycol as a dispersant to prepare calcium silicate powder body. The prepared solution and residue were characterized and the effects of the amount of roasted material and the ionic valence of the metal on the purity and recovery of the product were studied. In this experiment, by controlling the appropriate process conditions, the leaching rates of iron and calcium were 83.2% and 67.7%, respectively. The process was simple and the cost was low, which realized the comprehensive utilization of mineral resources.