Floatation process for removing quartz from giobertite

Abstract

The invention relates to a technique for removing quartz from magnesite ores, and pertains to the ore dressing field. A cationic collector is adopted by the invention under an alkaline condition to remove the quartz in magnesite ores; the cationic reverse flotation is improved by adding a special regulator and an additive so as to increase the efficiency of separation and selection. Compared with other methods, the method of the invention has the advantages of high productivity of the concentrated magnesite ores, convenient process of products, repeated utilization of water, and wide application range, etc. The concentrated magnesite ore which contains less than 0.3 percent of SiO2 and more than 47 percent of MgO is obtained from the concentrated magnesite ore containing less than 4 percent of SiO2. When the method of the invention is used for removing quartz, under the situation of ensuring same content of SiO2 in the concentrated magnesite, the productivity of the concentrated ore is increased over 10 percent in comparison to that of the prior art; meanwhile, the problems that when the cationic collector is used for reversing flotation froths becomes sticky and that the concentrated ores are difficult to filter are solved.

Description

technical field [0001] The invention belongs to the field of mineral processing, and relates to a flotation process, in particular to a method for removing quartz from magnesite ore. Background technique [0002] Chinese magnesite ore is characterized by high grade MgO and low impurity content. However, with the continuous development of resources and the continuous improvement of raw material requirements for magnesia refractory materials, magnesite resources that can meet the requirements for the production of high-grade refractory materials are becoming less and less, so the effective use of low-grade magnesite ore has become an urgent problem to be solved . One of the effective ways to utilize low-grade magnesite ore is to remove the impurities and improve the grade of MgO by beneficiation. [0003] In order to remove harmful impurities in magnesite ore and improve ore grade, the current industrial beneficiation methods of magnesite ore mainly include thermal separatio...

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the low yield of magnesite concentrate, and the problems of sticky foam and difficult product filtration when cationic collectors are used in addition, to provide a more effective method for more effectively removing quartz in magnesite ore. The method makes the separation effect of magnesite and quartz better, significantly improves the yield of magnesite concentrate, and has simple process, low investment cost, good economic and environmental benefits

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