A mineral processing method for obtaining low-sulfur diaspore concentrate

Abstract

The invention discloses a beneficiation method for obtaining low-sulfur diaspore concentrate, and belongs to the technical field of bauxite beneficiation. The method comprises the following steps of performing limonite content analysis on the to-be-beneficiated diaspore raw ore; if the content of the limonite in the raw ore is lower than 8%, in the ball milling process before flotation or re-beneficiation, adding the limonite with the sulfur content not higher than 0.03%, so that the content of the limonite in the raw ore reaches 8%, and then carrying out flotation or re-beneficiation, and feeding the obtained ore pulp into a magnetic separator, wherein the strength of the magnetic field is 10,000-20,000 gauss; and if the content of the limonite in the raw ore is not lower than 8%, directly performing ball milling and flotation or re-beneficiation, and then feeding the ore pulp obtained after flotation or re-beneficiation into the magnetic separator, wherein the magnetic field intensity is 10,000-20,000 gauss. By adoption of the method, the sulfur content of the diaspore with the sulfur content of 5% or above can be reduced to be 0.3% or below, so that the requirement for producingaluminum oxide by the bayer process is met. The method has the advantages that the cost is low, the environment-friendly requirement is met, and the economic benefit is remarkable.

Description

technical field [0001] The invention belongs to the technical field of mineral processing of bauxite, and in particular relates to a mineral processing method for obtaining low-sulfur diaspore concentrate. Background technique [0002] In the production process of alumina Bayer process, the existence of any form of sulfur will seriously affect the production. Production practice shows that the Bayer process is used to produce alumina, and the requirement for the diaspore concentrate is that the weight percent content of sulfur is below 0.3% (the contents described below all refer to the weight percent content). The original form of sulfur in high-sulfur diaspore bauxite and the transformation in the subsequent production process are complicated. When the diaspore raw ore contains more than 5% sulfur, due to the pyrite in the diaspore, pyrrhotite (Fe1-xS), marcasite blasting in the production process, open-air storage, Transportation, crushing, grinding, beneficiation and o...

AI Technical Summary

Problems solved by technology

In fact, the daily processing capacity of bauxite concentrators is more than 1,000 tons. Using this method requires a special "electromagnetic radiation reaction tank" with huge capacity and high electric power. The high-sulfur bauxite stored in the open air on site cannot be kept in a dry state. state, pre-magnetization is difficult when there is a lot of moisture, so not only consumes a lot of power, but also costs high, and the effect of magnetization pre-treatment is difficult to control

This method is only suitable for the laboratory and is difficult to implement in actual production