Flotation method for phosphate ore

A phosphate rock and ore grinding technology, applied in flotation, solid separation, etc., can solve problems such as environmental pollution, corrosion of metal waste in the flotation system, and achieve the effects of reducing the use of sulfuric acid, saving money, and solving scaling

Active Publication Date: 2018-10-19
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of sulfuric acid used in industry will not only cause enviro

Method used

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  • Flotation method for phosphate ore

Examples

Experimental program
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Effect test

Example Embodiment

[0016] Example 1: Such as figure 1 As shown, a method for flotation of phosphate rock includes the following steps:

[0017] (1) Crush the raw calcium-magnesium low-grade phosphate rock. After crushing, add the crushed product to the ball mill, add sodium fluoride and tap water into the ball mill until the ore concentration is 60% for grinding, control the grinding time, and grind until the particle size is less than 0.074 The mass fraction of ore particles in mm accounts for 75%, and the amount of sodium fluoride relative to the raw ore is 1.38kg / t;

[0018] (2) Control the temperature at room temperature, add tap water to adjust the slurry until the solid concentration in the slurry is 300g / L, add the pH adjuster sulfuric acid to the slurry, stir, and adjust the pH of the slurry to 6;

[0019] (3) Add inhibitor and stir. Phosphoric acid is used as inhibitor, and the amount is 7.8kg / t relative to the amount of raw ore;

[0020] (4) Add the reverse flotation collector GJBW and stir, ...

Example Embodiment

[0023] Example 2: Such as figure 1 As shown, a method for flotation of phosphate rock includes the following steps:

[0024] (1) Crush the raw calcium-magnesium low-grade phosphate rock. After crushing, add the crushed product to the ball mill, add sodium fluoride and tap water into the ball mill until the ore concentration is 60% for grinding, control the grinding time, and grind until the particle size is less than 0.074 The mass fraction of ore particles in mm accounts for 75%, and the amount of sodium fluoride relative to the raw ore is 1.42kg / t;

[0025] (2) Control the temperature at room temperature, add tap water to adjust the slurry until the solid concentration in the slurry is 300g / L, add the pH adjuster sulfuric acid to the slurry, stir, and adjust the pH of the slurry to 6;

[0026] (3) Add inhibitor and stir. Phosphoric acid is used as inhibitor, and the amount is 8.2kg / t relative to the amount of raw ore;

[0027] (4) Add the reverse flotation collector GJBW and stir, ...

Example Embodiment

[0030] Example 3: Such as figure 1 As shown, a method for flotation of phosphate rock includes the following steps:

[0031] (1) Crush the raw calcium-magnesium low-grade phosphate rock. After crushing, add the crushed product to the ball mill, add sodium fluoride and tap water into the ball mill until the ore concentration is 60% for grinding, control the grinding time, and grind until the particle size is less than 0.074 The mass fraction of ore particles in mm accounts for 75%, and the amount of sodium fluoride relative to the raw ore is 1.40kg / t;

[0032] (2) Control the temperature at room temperature, add tap water to adjust the slurry until the solid concentration in the slurry is 300g / L, add the pH adjuster sulfuric acid to the slurry, stir, and adjust the pH of the slurry to 6;

[0033] (3) Add inhibitor and stir. Phosphoric acid is used as inhibitor, and the amount is 8kg / t relative to the amount of raw ore;

[0034] (4) Add the reverse flotation collector GJBW and stir aga...

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Abstract

The invention discloses a flotation method for phosphate ore. The flotation method comprises the following steps that calcium-magnesium-based low-grade raw phosphate ore is adopted and is screened into particles through breaking, the phosphate ore is taken into a ball mill, tap water is added, fluorochemicals are added, and phosphate ore pulp is obtained; sulfuric acid is added into the ore pulp,and stirring is conducted; an inhibitor is added, and stirring is conducted; a collection agent is added, and stirring is conducted; and flotation is conducted through a flotation machine, dolomite isremoved, phosphate ore concentrate products are obtained. The products obtained through the flotation method is qualified in grade, the recovery rate is high, the process is simple, and the application range is wide. Compared with a traditional phosphate ore reverse flotation process, the flotation method has the advantages that the flotation PH value is increased to 6 from 5, the sulfuric acid usage amount is reduced substantially, scaling and other unnecessary losses of a flotation system can be avoided effectively, and the flotation method is suitable for flotation separation of dolomite,calcite and other phosphate minerals containing calcium carbonate and fluorapatite in the phosphate ore.

Description

technical field [0001] The invention relates to a phosphate rock flotation method, which belongs to the technical field of phosphate rock flotation. Background technique [0002] my country is rich in phosphate rock resources, and the distribution is relatively concentrated, but the ore is mostly low-grade ore, about 90% of the phosphate rock grade is below 26%, rich ore resources are few and mining is difficult. Calcium-containing carbonates such as dolomite are the main gangue minerals in glenite, and the main purpose of beneficiation is to remove carbonates. In the traditional phosphate rock reverse flotation magnesium removal, sulfuric acid is often used as a regulator to adjust the pH value of the pulp to about 5, phosphoric acid is used as an inhibitor of fluoroapatite, and fatty acid is used as a collector to remove dolomite. Due to the large amount of sulfuric acid used in the industry will not only cause environmental pollution, but also corrode the metal of the fl...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D103/06B03D101/00B03D101/06B03D101/02
CPCB03D1/018B03D2201/007B03D2201/02B03D2201/06B03D2203/06
Inventor 王志强聂光华王东
Owner GUIZHOU UNIV
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