Application of a kind of inhibitor aa/amps in positive flotation demagnesization of phosphate rock

Abstract

The invention relates to the application of an inhibitor AA / AMPS in positive flotation demagnesization of phosphate rock, which belongs to the field of mineral processing and purification technology of phosphate rock. This application is to add inhibitor AA / AMPS in the process of positive flotation demagnesification of phosphate rock. Specifically, the inhibitor AA / AMPS is used to prepare phosphate rock pulp, wherein the mass concentration of the phosphate rock pulp is 20-25%; the inhibitor AA / AMPS accounts for 100-140 g / t of the phosphate rock pulp. Inhibitor AA / AMPS (acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer), for phosphate rock containing a lot of dolomite, under alkaline conditions, inhibits the flotation of dolomite by positive flotation process It can effectively increase the difference in flotation performance between apatite and dolomite, and facilitate the efficient removal of dolomite. In addition, the inhibitor AA / AMPS has the characteristics of strong selectivity of inhibitory performance, low cost, and simple use, etc. It can effectively reduce the magnesium content of phosphate concentrate, improve the quality of concentrate, and realize the flotation of high-magnesium and low-grade phosphate rock to reduce magnesium. Target.

Description

technical field [0001] The invention relates to the field of phosphate rock ore dressing and purification technology, in particular to the application of an inhibitor AA / AMPS in positive flotation demagnesization of phosphate rock. Background technique [0002] Phosphate rock usually refers to the general term of phosphate minerals that can be used economically, and is the most important basic mineral material of phosphorus chemical industry. Phosphate rock is used as the main raw material for the production of phosphate fertilizers and phosphate chemical products, and is used in industrial sectors such as medicine, food, matches, dyes, sugar, ceramics, and national defense. my country has abundant reserves of phosphate rock resources, which ranks second in the world. However, the reserves of high-grade phosphate rock in my country are low, and the complex and difficult-to-handle high-magnesium phosphate rock resources account for a large proportion. At present, high-magnes...

AI Technical Summary

Problems solved by technology

However, since both apatite (the main useful mineral of phosphate rock) and dolomite belong to calcium-containing salt minerals, the two minerals have the same calcium active site and similar physical and chemical properties, resulting in the floating of apatite and dolomite. Very difficult to separate

At present, fatty acid collectors are widely used in phosphate rock flotation, but due to the poor selectivity of this type of collector, if you want to realize the flotation of phosphorus minerals to remove magnesium, that is, to separate apatite and dolomite by flotation, most Under acidic conditions, the separation of the two is achieved by adding inorganic acids such as phosphoric acid or sulfuric acid to inhibit apatite reverse flotation, but there are a series of problems such as large acid consumption, serious equipment corrosion under acidic conditions, and difficulty in treating acid-containing wastewater from tailings. , seriously restricting the comprehensive development and utilization of high-magnesium and low-grade phosphate rock

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