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Inhibitor for direct flotation of high-calcium fluorite and flotation method

A positive flotation and depressant technology, applied in the field of high-calcium fluorite positive flotation, can solve the problems of affecting the recycling of backwater, difficulty in obtaining flotation indicators, and poor selectivity, so as to reduce the increase in collector consumption, Large market application prospect and low cost effect

Active Publication Date: 2020-06-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the content of calcium-containing gangue minerals in the raw ore reaches a certain value, it is necessary to add a large amount of gangue inhibitors. The existing gangue inhibitors used for fluorite flotation mainly include water glass and its modified products , such as acidified water glass and salinized water glass, and tannic acid, starch, etc., although these inhibitors have a certain inhibitory effect on calcite, but the selectivity is poor, it is difficult to obtain ideal flotation indicators, and the amount is large, polluting surroundings
In addition, strong alkaline pulp also seriously affects the recycling of backwater

Method used

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  • Inhibitor for direct flotation of high-calcium fluorite and flotation method
  • Inhibitor for direct flotation of high-calcium fluorite and flotation method
  • Inhibitor for direct flotation of high-calcium fluorite and flotation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, a high-calcium fluorite mine in Hunan is used as raw material, and the sample mainly contains 16.11% CaF 2 , 13.56% CaCO 3 . The main gangue minerals are calcite, etc., among which calcite has a high content and is difficult to sort.

[0037] see figure 1 , a high-calcium fluorite positive flotation method, specifically comprising the steps of:

[0038] 1) Crush the raw fluorite ore, and use a ball mill to grind the ore to a fineness of -0.074mm, which accounts for 75%-85% of the raw ore quality;

[0039] 2) Prepare the ore powder into a slurry, add 1000g of water glass as the first gangue mineral inhibitor to each ton of the slurry, stir for 5 minutes, then add 300g of sodium oleate as a collector, and adjust the slurry with hydrochloric acid after stirring for 3 minutes The pH value is 6-8;

[0040] 3) Stir and aerate for 5 minutes for flotation, the aeration volume is 0.2m 3 / h, get fluorite coarse concentrate after one roughing and one sweepin...

Embodiment 2

[0043] In this example, a high-calcium fluorite ore in Henan is used as raw material, and the sample mainly contains 14.66% CaF 2 , 19.23% CaCO 3 . The main gangue minerals are calcite, etc., among which calcite has a high content and is difficult to sort.

[0044] The positive flotation method used in this embodiment is basically the same as that of Example 1, the only difference being that the ethylenediaminetetramethylene (ethylenediaminetetramethylene) corresponding to each ton of pulp in each selection in step 4) in this embodiment is selected from one to selected four The amount of base phosphonic acid is 30g, and the amount of ethylenediaminetetramethylene phosphonic acid corresponding to each ton of pulp in each selection from the fifth to the seventh is 20g.

Embodiment 3

[0046] In this example, a high-calcium fluorite mine in Fujian is used as raw material, and the sample mainly contains 25.46% CaF 2 , 11.71% CaCO 3 . The main gangue minerals are calcite, etc., among which calcite has a high content and is difficult to sort.

[0047] The positive flotation method used in this embodiment is basically the same as that of Example 1, the only difference being that the ethylenediaminetetramethylene (ethylenediaminetetramethylene) corresponding to each ton of pulp in each selection in step 4) in this embodiment is selected from one to selected four The amount of base phosphonic acid is 15g, and the amount of ethylenediaminetetramethylene phosphonic acid corresponding to each ton of pulp in each of the beneficiation five to seven is 8g.

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Abstract

The invention provides an inhibitor for direct flotation of high-calcium fluorite. The inhibitor is an aqueous solution of ethylenediamine tetramethylene phosphonic acid. The invention further provides a high-calcium fluorite direct flotation method, which comprises the steps: firstly, crushing fluorite raw ores into powder and preparing the fluorite powder into ore pulp; then, adding a pH regulator into the ore pulp to control the pH value of the ore pulp to be 6-8 all the time; meanwhile, adding water glass and sodium oleate into the ore pulp, and carrying out roughing and scavenging on thefluorite raw ores to obtain fluorite rough concentrate; and finally, adding the inhibitor containing ethylenediamine tetramethylene phosphonic acid into the ore pulp containing the fluorite rough concentrate, and carrying out concentration on the fluorite rough concentrate to obtain fluorite concentrate, the total dosage of ethylenediamine tetramethylene phosphonic acid in each ton of fluorite rawores being 70-450 g. The inhibitor has the advantages of being low in cost, remarkable in selectivity, mild in using environment and free of secondary pollution, fluorite and calcite in the high-calcium fluorite can be efficiently separated, and the grade and the recovery rate of the fluorite are high.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation, and in particular relates to an inhibitor for high-calcium fluorite forward flotation and a high-calcium fluorite forward flotation method using the inhibitor. Background technique [0002] Fluorspar, also known as fluorspar, its main component is CaF 2 , is currently the main source of industrial fluorine. The application fields of fluorine cover new energy, new materials, national defense, optoelectronics, metallurgy, chemical industry and other industries, and play an irreplaceable role. Therefore, fluorite is recognized as a strategic protection mineral resource at home and abroad. my country's fluorite resource reserves are abundant, but most of them are associated mines, and there are few single deposits. [0003] In nature, fluorite is often closely symbiotic with other calcium-containing minerals, such as calcite, dolomite, scheelite and apatite, etc. At present, flotation is ...

Claims

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Application Information

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IPC IPC(8): B03D1/014B03D101/06B03D103/04
CPCB03D1/014B03D2201/06B03D2203/04
Inventor 高志勇江哲伊王建军陶黎明汪聪伍思回任帅
Owner CENT SOUTH UNIV
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