Method for increasing magnesite flotation recovery rate

Abstract

The invention discloses a method for increasing the magnesite flotation recovery rate. The method comprises the steps that reverse flotation silicone-removing work is conducted on crude ore pulp, foamsubjected to reverse flotation fine selection is fused together for reverse flotation fine scavenging, underflow subjected to reverse flotation fine scavenging returns to the first reverse flotationfine selection or reverse flotation coarse selection, underflow subjected to last reverse flotation fine selection is subjected to direct flotation calcium-lowering work, underflow subjected to directflotation coarse selection is subjected to direct flotation scavenging, foam subjected to direct flotation coarse selection is subjected to two to four times of direct flotation fine selection, foamsubjected to the last direct flotation fine selection is magnesite concentrate, underflow subjected to the first direct flotation fine selection is subjected to direct flotation fine scavenging, foamof direct flotation fine scavenging returns to direct flotation coarse selection or direct flotation scavenging, and other underflow subjected to direct flotation fine selection and foam subjected todirect flotation scavenging return to the previous work in sequence. Silicone and calcium impurities can be efficiently removed, the magnesite flotation recovery rate is increased by a large margin, and application of a flotation silicone-removing calcium-lowering technology of low-grade magnesite in the industry can also be achieved.

Description

technical field [0001] The invention relates to the field of magnesite beneficiation, in particular to a method for improving the flotation recovery rate of magnesite. Background technique [0002] Magnesite is an important strategic mineral resource and an essential refractory material in metallurgy, chemical industry, and non-metallic industries. It can be used to prepare high-end functional materials required in aerospace, aviation, military, metallurgy, and environmental protection. Due to the relatively rich and concentrated reserves of magnesite resources, high ore grade and less impurities, there has been a serious phenomenon of "mining the rich and abandoning the poor" in the development of magnesite for many years, and has long relied on high-quality minerals that can be directly used without enrichment. Grade ore (MgO content>46%). However, with the depletion of high-grade magnesite resources, and the downstream industrial chain has higher and higher requiremen...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the technical problems that the conventional reverse-positive flotation open-circuit process in the prior art has low concentrate yield and is difficult to achieve high efficiency and stability in industrial operation, the present invention provides a method for improving the recovery rate of magnesite flotation, It can not only efficiently remove silicon-calcium impurities, greatly improve the recovery rate of magnesite flotation, but also have stable production, and can realize the application of low-grade magnesite flotation desiliconization and calcium reduction process in industry

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