Efficient purification method for high-silicon high-calcium high-iron low-grade brucite

Abstract

The invention relates to an efficient purification method for high-silicon high-calcium high-iron low-grade brucite and belongs to the technical field of mineral processing. The method comprises the steps that (1), ore grinding is carried out on the high-silicon high-calcium high-iron low-grade brucite; (2), magnetic separation is carried out on the material after ore grinding, and iron-bearing minerals are removed; (3), water is added to magnetic separation concentrate for pulp conditioning, then an inhibitor, a collector and a foaming agent are added for reverse flotation rough selection, the obtained reverse flotation coarse concentrate is subjected to 1-2 times of reverse flotation selection, and desiliconized concentrate is obtained; and (4), water is added to the desiliconized concentrate for pulp conditioning, the pH value is adjusted, the inhibitor and the collector are added and stirred, direct flotation rough flotation is carried out, the obtained decalcified concentrate is subjected to 1-2 times of positive flotation selection, and brucite concentrate is obtained. The ore processed by the method has high content of calcium, silicon, iron and other gangue minerals, the purified brucite concentrate has high purity and good mineral processing effect, and the method is of great significance in development and efficient utilization of high-silicon high-calcium high-iron low-grade brucite resources in China.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a high-efficiency purification method of high-silicon, high-calcium, high-iron and low-grade brucite. Background technique [0002] Brucite, also known as magnesia, is an important non-metallic mineral resource. It is mainly used in the industry to produce magnesia refractory materials, such as magnesia carbon bricks and magnesia chrome bricks required by the iron and steel industry; it can also be aggregated Propylene is used as the matrix to make high-grade inorganic flame retardants, magnesium cements, ceramics, etc. [0003] my country is a country rich in brucite resource reserves. At present, the proven reserves of brucite resources have exceeded 30 million tons, ranking first in the world. They are mainly distributed in Ningqiang, Shaanxi, Fengcheng, Liaoning, and Ji'an, Jilin. Most of the brucite resources in our country are of high natural grade, ...

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Problems solved by technology

[0005] Aiming at the problem that the existing flotation process is difficult to deal with high-silicon, high-calcium, high-iron and low-grade brucite, the present invention provides a high-efficiency purification method for high-silicon, high-calcium, high-iron and low-grade brucite. The high-iron and low-grade brucite is ground with a ball mill until the monomers are dissociated, and then separated by a strong magnetic separation process to remove iron minerals contained in the ore, and then processed by a flotation process to obtain high-grade refractory products. High-grade brucite as material

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