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Flotation technology for separating apatite, dolomite and quartz in enriched phosphorite

A dolomite and apatite technology, applied in flotation, solid separation, etc., can solve the problems of poor low-temperature solubility of ore dressing reagents, high flotation costs, expensive regulators, etc., achieve high-efficiency room temperature flotation, and improve flotation efficiency , to achieve the effect of comprehensive utilization

Active Publication Date: 2017-08-11
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing flotation process mostly focuses on improving the recovery of phosphorus resources, involving less magnesium and silicon resources. At the same time, there are problems such as poor solubility of mineral dressing agents at low temperature, expensive regulators, long operation process, and high flotation costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A flotation process for separating and enriching apatite, dolomite and quartz in phosphate ore, aiming at the mixed ore with a mass ratio of apatite, dolomite and quartz at 1:1:1, the P in the ore sample 2 o 5 14.84%, SiO 2 40.21%, MgO 7.89%, CaO 35.15%, its flotation process includes the following steps:

[0030] 1) Grind and sieve apatite, dolomite and quartz respectively to obtain a grinding product with a grinding fineness of -200# accounting for 80-100%, and use the mass ratio of the three obtained grinding products to be 1:1:1 Mix well to obtain mixture Ι;

[0031] 2) Add water to the mixture I obtained in step 1) to obtain slurry (solid-to-liquid ratio 1-10:180), add dolomite inhibitor sodium silicate and fatty acid kerosene solution to the slurry (the concentration of fatty acid in kerosene is 100ppm) , the volume ratio of the fatty acid kerosene solution to the pulp is 2:90, the concentration of sodium silicate in the pulp is 1mM, the pH value is adjusted ...

Embodiment 2

[0036] A flotation process for separating and enriching apatite, dolomite and quartz in phosphate rock, aimed at a phosphate rock in Yichang, P 2 o 5 The content is 20%, the MgO content is 1.7%, and its flotation process includes the following steps:

[0037] 1) Grinding and screening the phosphate rock to obtain a grinding product with a grinding fineness of -200# accounting for 80-100%;

[0038] 2) adding water to the obtained grinding product in step 1) to obtain a slurry, adding dolomite inhibitor sodium silicate and fatty acid kerosene solution (the concentration of fatty acid in kerosene is 100ppm) in the slurry, the volume ratio of the fatty acid kerosene solution to the slurry 2:90, the concentration of sodium silicate in the pulp is 1mM, adjust the pH value to 5.5, carry out positive flotation of fatty acid active oily bubbles on the pulp (fatty acid active oily bubbles are prepared from fatty acid kerosene solution), and the flotation time 5min, slurry stirring spe...

Embodiment 3

[0043] A flotation process for separating and enriching apatite, dolomite and quartz in phosphate rock, aimed at a phosphate rock in Yunnan, P 2 o 5 The content is 17%, the MgO content is 3.6%, and its flotation process includes the following steps:

[0044] 1) Grinding and screening the phosphate rock to obtain a grinding product with a grinding fineness of -200# accounting for 80-100%;

[0045] 2) adding water to the obtained grinding product in step 1) to obtain a slurry, adding dolomite inhibitor sodium silicate and fatty acid kerosene solution (the concentration of fatty acid in kerosene is 100ppm) in the slurry, the volume ratio of the fatty acid kerosene solution to the slurry 2:90, the concentration of sodium silicate in the pulp is 2mM, adjust the pH value to 6.5, carry out positive flotation of fatty acid active oil bubbles on the pulp (fatty acid active oil bubbles are prepared from fatty acid kerosene solution), flotation time 6min, slurry stirring speed 350rpm, ...

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Abstract

The invention provides a flotation technology for separating apatite, dolomite and quartz in enriched phosphorite. The technology comprises the following specific steps that (1) raw phosphorite is ground; (2) phosphorite grinding products in the step (1) are subjected to active oil bubble direct flotation, and flotation forth I with apatite as the main ingredient and flotation underflow I are obtained; (3) a collecting agent is directly added into the flotation underflow I in the step (2), conventional bubble direct flotation is carried out, and flotation forth II with dolomite as the main ingredient and flotation underflow II with quartz as the main ingredient are obtained; and (4) the flotation forth I in the step (2) and the flotation forth II and the flotation underflow II in the step (3) are subjected to filtering and vacuum drying to obtain flotation products. According to the method, the flotation process of the phosphorite is simplified, the use level of the collecting agent is reduced, the flotation recovery rate and selectivity are increased, and efficient normal-temperature flotation of the phosphorite is achieved.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a method for separating and enriching apatite and dolomite in phosphate rock. [0002] Flotation process of stone and quartz. Background technique [0003] Phosphate rock resource is an important mineral strategic resource in my country. It is not only an important material for preparing phosphate fertilizer and ensuring food production, but also a basic chemical raw material for phosphorus chemical industry. It is an irreplaceable and non-renewable mineral resource. Phosphate rock reserves in China are large, but the grade is relatively low and generally not high. Phosphate rock reserves with a grade lower than 18% account for about half of the total reserves, and the average P 2 o 5 About 17%, MgO, Al 2 o 3 and Fe 2 o 3 The content is higher. Phosphorus valuable minerals and gangue minerals are closely symbiotic, and the embedded distribution is fine, with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02B03D1/018B03D101/06B03D101/02
CPCB03D1/018B03D1/021B03D2201/02B03D2201/06
Inventor 周芳徐政和池汝安张臻悦余军霞
Owner WUHAN INSTITUTE OF TECHNOLOGY
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