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Phosphate ore washing classification and separation method

A technology for phosphate ore and phosphate rock, applied in the field of mineral processing, can solve the problems of difficult defoaming, poor comprehensive technical and economic indicators, and uneven steps of useful minerals.

Active Publication Date: 2020-07-07
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • 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 discloses a phosphate ore washing classification and separation method, and belongs to the technical field of mineral processing. The method comprises the steps that slurry and valuableminerals are separated through a plurality of sections of scrubbing operation; slurry is removed through a plurality of sections of desliming operation; after multi-section screening operation, raw ore is separated into minerals of three grades: the high grade, the medium-low grade and barren rock; calcite contained in the minerals of the high grade is removed through an acid leaching method, theminerals of the medium-low grade are subjected to ore grinding flotation operation. According to the method, the ore washing operation and the desliming operation are combined so that phosphorite obtained after monomer separation and slurry can be separated, the grain size of the flotation pulp is controlled within the narrow range, the mineral separation cost is greatly lowered, and the floatation environment is greatly improved. Broken materials are separated into different grain sizes through multi-section screening, some grain sizes of the high level and the grain sizes of the low level are separated independently, then, separated processing is performed, energy consumption of the ore grinding operation is greatly lowered, and the dehydration operation effect is improved.

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 Applications(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
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