A kind of phosphate ore washing classification roasting flotation method

Abstract

The invention relates to a phosphate ore washing, classification, roasting and flotation method, which belongs to the technical field of mineral processing. The method separates ore slime and useful minerals through several stages of scrubbing operations; removes fine mud through multiple stages of desliming operations; The multi-stage screening operation divides the raw ore into three grades of high, medium and low, and waste rock; the high-grade ore is roasted to remove the calcite contained in it, and the medium and low-grade ore is processed by grinding and flotation. The method of the present invention is reasonably designed. By combining ore washing and desliming operations, the dissociated phosphorus minerals and mud washing are separated, and the particle size of the flotation pulp is controlled within a narrow range, which greatly reduces the cost of mineral processing. cost and improved flotation environment. The crushed materials are divided into different grades by multi-stage screening method, and a part of high-grade grades and low-grade grades are separately selected in advance, and then processed separately, which greatly reduces the energy consumption of grinding operations and improves the efficiency of the grinding process. The effect of dehydration operation.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a phosphate ore washing, graded, roasting and flotation method. Background technique [0002] Phosphorus fertilizer is an indispensable nutrient in agricultural production. Phosphate rock is the main raw material of phosphate fertilizer. At present, no substance can be found in the world to replace it. As the world population grows, so does the demand for phosphate fertilizers. my country is a country with a large amount of phosphate rock resources, but phosphorus resources are rich but not rich. In my country, phosphate rock resources are mainly concentrated in Yunnan, Guizhou, Sichuan, Hunan, Hubei and other places, mainly sedimentary phosphorites, of which medium and low grade colloidal phosphorus These medium and low-grade phosphate rocks need to be enriched through beneficiation to produce qualified phosphate concentrate for use in phosphorus chemical industry. ...

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Problems solved by technology

[0003] There are a large number of low-grade collophosphine resources around the Dianchi Lake in Yunnan and North Africa. This kind of resource has many problems of primary ore slime and uneven distribution of useful minerals in each particle size. If the current conventional grinding and flotation method is adopted , there are problems of low utilization rate of resources and high energy consumption, especially in fine and thick tailings and difficulty in thickening and defoaming in downstream phosphoric acid production. The comprehensive technical and economic indicators are poor, and stable production cannot be guaranteed.

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