Beneficiation method for cassiterite-polymetallic sulfide ores

Abstract

The invention relates to a beneficiation method for cassiterite-polymetallic sulfide ores, and belongs to the technical field of beneficiation. The beneficiation method comprises the following steps: putting the cassiterite-polymetallic sulfide ores into an ore mill, and milling the cores until ore materials with grain size being (-)200 meshes account for 85%; carrying out primary flotation on the ore materials to obtain sulfide ores and residual ore pulp, wherein use of a floating reagent added in a floating process is that one ton of cassiterite-polymetallic sulfide ores contain 500g of butyl-xanthate, and use of a foaming agent is that one ton of cassiterite-polymetallic sulfide ores contain 20g of terpenic oil; and carrying out primary rough concentration, primary scavenging and secondary concentration and flotation on the residual ore pulp to obtain tin concentrates and tailings. According to the method, useful minerals are effectively recycled through a selective ore milling-floatation method, so that a tin beneficiation process is greatly simplified, and therefore, the beneficiation method has good economic benefits.

Description

technical field [0001] The invention relates to a beneficiation method of cassiterite polymetallic sulfide ore, which belongs to the technical field of beneficiation. Background technique [0002] my country is rich in tin ore resources, and the main deposit types are cassiterite-sulfide deposits, such as Gejiu and Dachang tin deposits, which are widely distributed, mainly in Yunnan, Guangxi, Guangdong, Hunan and other provinces. There are many associated components, and the comprehensive utilization value is great. Cassiterite (SnO 2 ) is the main recovered tin-bearing mineral. More than 3 / 4 of my country's tin metal comes from cassiterite, and the reserves of tin ore are about 3.84 million tons, ranking first in the world. Tin-containing minerals include cassiterite, pyrophyllite, kesterite, stibnite, cassiterite, etc., but cassiterite is the only available mineral for tin metal, and other tin minerals generally have no economic value . With the decreasing grade of ca...

AI Technical Summary

Problems solved by technology

Since the appearance of arsine and phosphonic cassiterite flotation agents (typical examples are toluene arsenic acid and styrene phosphonic acid), the flotation efficiency has been significantly improved. The recovery of coarse-grained tin ore is currently commonly used. It is a gravity separation method. With the increase of mining years, the rich ore has been gradually exhausted. On the one hand, the embedded distribution characteristics of tin ore are becoming more and more complicated. In the recovery of cassiterite, it is inevitable to recover other valuable components (such as sulfide On the other hand, due to the brittleness and fragility of cassiterite, it will inevitably encounter a contradiction that cannot be overcome by gravity in the process of recycling cassiterite—the particle size is too fine

[0003] For the beneficiation of cassiterite polymetallic sulfide ore, the sulfide minerals are generally removed by flotation, and the ore that has removed the sulfide minerals is then enriched by flotation and reclaimed by gravity. , the problem of how to control the ore grinding particle size in the process, that is, when the sulfide minerals are removed by flotation, the ore grinding particle size is required to be finer, which is beneficial to the flotation of sulfide minerals, but if the ore grinding particle size is finer , so that the cassiterite is excessively crushed, which is not conducive to the recovery of the cassiterite gravity separation process