Flotation process for silicon-calcium mixed collophanite containing organic carbon

Abstract

The invention discloses a flotation decarburization and direct and reverse flotation process for silicon-calcium mixed collophanite containing organic carbon. The mass percentage of the organic carbon in the silicon-calcium mixed collophanite ranges from 1% to 10%. The flotation process includes sequentially performing flotation decarburization, direct flotation desiliconization and reverse flotation magnesium removal. A flotation decarburization technology includes adding water into the silicon-calcium mixed collophanite containing the organic carbon and crushing and grinding the silicon-calcium mixed collophanite containing the organic carbon to obtain ore pulp with the mass concentration ranging from 20% to 40%; adding collecting agents and foaming agents into the ore pulp and mixing the ore pulp, the collecting agents and the foaming agents with one another; stirring and regulating the pulp and performing flotation on the ore pulp by the aid of a flotation machine to obtain foam products which are tailings containing carbon; implementing a direct flotation desiliconization technology on products in tanks; then sequentially implementing direct and reverse flotation on the products. The flotation decarburization and direct and reverse flotation process has the advantages that organic carbon gangue can be eliminated by means of flotation implemented by the aid of the anionic fatty acid collecting agents and the diethyl phthalate foaming agents, accordingly the content of the organic carbon in the ore pulp can be reduced, consumption of the collecting agents can be decreased, the high quantity of direct flotation foam can be reduced, and the flotation selectivity can be improved.

Description

technical field [0001] The invention belongs to the technical field of phosphate ore beneficiation, and in particular relates to an organic carbon silicon-calcium mixed type collophosite flotation decarbonization-direct and reverse flotation process. Background technique [0002] Phosphate rock is an essential basic raw material for the production of phosphate fertilizers and phosphorus chemical products. my country's phosphate resource reserves are 16.786 billion tons, with an average grade of 16.95%. The high-grade ore that can be directly used can only be mined for more than ten years. Poor dissociation and high content of gangue minerals such as silicate minerals and carbonate minerals. For this type of ore, it is necessary to exclude gangue minerals such as silicate minerals and carbonate minerals in the beneficiation process to meet the requirements. Phosphorus chemical industry requirements, its development and utilization is a worldwide problem. Especially for the be...

AI Technical Summary

Problems solved by technology

Especially in the beneficiation of low-grade silicon-calcium mixed type collophosite containing a small amount of organic carbon, conventional direct flotation and single reverse flotation can only reduce the content of one of the gangue minerals, and cannot obtain better quality Phosphate concentrate

At present, the more reasonable separation and enrichment process of this type of phosphate rock is positive and negative flotation. This process uses anionic collectors to remove carbonate minerals and silicate minerals in different acid-base pulps. , to obtain high-grade phosphate concentrate, but in the forward and reverse flotation of silicon-calcium mixed phosphate rock containing organic carbon, due to the presence of organic carbon, a large amount of anionic collectors will be adsorbed, and the collection will be doubled. The amount of agent used, otherwise, the flotation cannot be completed

Increasing the amount of collector will increase the amount of foam in positive flotation, reduce the selectivity of flotation, easily cause mechanical inclusion of foam and difficulty in transportation, make the flotation process difficult to control and stabilize, and lead to a substantial increase in beneficiation costs

Because of the above-mentioned technical and economic problems, the industrialization of the flotation process of organic carbon silicon-calcium mixed collophosite is restricted.