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A kind of phosphate ore washing classification and separation method

A phosphate ore and ore washing technology, which is applied in the field of mineral processing, can solve problems such as difficulty in thickening, poor comprehensive technical and economic indicators, and low resource utilization rate, and achieve the goals of avoiding waste water treatment discharge, improving the flotation environment, and reducing the cost of mineral processing Effect

Active Publication Date: 2021-12-07
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of phosphate ore washing classification and separation method

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Effect test

Embodiment 1

[0037] Embodiment 1, a kind of phosphate ore washing classification separation method:

[0038] Through the two-stage scrubbing operation, the slime and useful minerals are separated; through the multi-stage desliming operation, the slime is removed;

[0039] The raw ore is divided into three grades of high, medium and low grade ores through multi-stage screening operations. The high grade ores are removed by acid leaching to remove the calcite contained in them, and the middle and low grade ores are used for grinding and flotation operations.

[0040] The high-grade ore and low-grade ore pass through the P 2 o 5content to distinguish; the method of distinction is as follows: high-grade ore refers to P 2 o 5 Ores with a content of not less than 28%; the low- and medium-grade ores mentioned refer to P 2 o 5 Ore with a content of 16%-28%; the grade distinction is obtained by detecting and analyzing the particle size composition and the distribution of each particle size gra...

Embodiment 2

[0042] Embodiment 2, a kind of phosphate ore washing classification separation method:

[0043] Through the two-stage scrubbing operation, the slime and useful minerals are separated; through the multi-stage desliming operation, the slime is removed;

[0044] The raw ore is divided into three grades of high, medium and low grade ores through multi-stage screening operations. The high grade ores are removed by acid leaching to remove the calcite contained in them, and the middle and low grade ores are used for grinding and flotation operations.

[0045] The middle and high grade phosphate rocks and the middle and low grade phosphate rocks are distinguished by sieving; the distinguishing method is as follows: one stage of scrubbing followed by one stage of sieving, and the particle size of the first stage of sieve sieve is controlled to 1~10mm; the second stage of desliming The coarse-grained materials in the operation are screened in the second stage. The sieve size of the seco...

Embodiment 3

[0047] Embodiment 3, a kind of phosphate ore washing classification separation method, carries out according to the following steps:

[0048] (1) The raw ore is crushed to below -20mm after the crushing operation, and then sent to the ore washing operation for scrubbing. The scrubbed pulp is sent to the first section of screening operation, the material on the screen is sent to the tailings stockyard, and the material under the screen is sent to the first section For desliming operation, the sieve size of the first stage of screening operation is controlled to 2mm, and the particle size of the first stage of desliming is controlled to 63μm.

[0049] (2) The coarse-grained pulp of the first stage of desliming operation is fed into the second stage of scrubbing operation, and the pulp of the second stage of scrubbing operation is fed into the second stage of desliming operation. Grain-sized pulp is fed into the tailings thickening operation;

[0050] (3) The fine-grained slurry...

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Abstract

The invention relates to a method for grading and sorting phosphate ore washing, which belongs to the technical field of mineral processing. The method separates ore slime from useful minerals through several stages of scrubbing operations; removes the ore slime through multiple stages of desliming operations; The screening operation divides the raw ore into three grades of high, medium and low, and waste rock. The high-grade ore is removed by acid leaching to remove the calcite contained in it, and the medium and low-grade ore is used for grinding and flotation. The method of the invention separates the dissociated phosphorus minerals from the ore slime through the combination of ore washing and desliming operations, controls the particle size of the flotation pulp within a narrow range, greatly reduces the cost of ore dressing and improves the flotation environment. The crushed materials are divided into different particle grades through multi-stage screening, and a part of high-grade particle grades and low-grade particle grades are selected separately in advance, and then processed separately, which greatly reduces the energy consumption of grinding operations and improves dehydration. The effect of the job.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a method for grading and sorting phosphate ore washing. 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. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 李丰宋文义杨勇刘星强
Owner BLUESTAR LEHIGH ENG INST CO LTD