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 wat

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

Example Embodiment

[0035] Example 1

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

[0037] See figure 1 , A high-calcium fluorite positive flotation method, specifically including the following steps:

[0038] 1) Crush the fluorite ore, and use a ball mill to grind the ore to a particle size of -0.074mm, accounting for 75%-85% of the ore mass;

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

[0040] 3) Stir and aerate for 5min for flotation, the aeration volume is 0.2m 3 / h, the crude fluorite concentrate is obtained after one roughing and one sweeping;

[0041] 4...

Example Embodiment

[0042] Example 2

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

[0044] The positive flotation method adopted in this embodiment is basically the same as that in embodiment 1, the difference is only that in this embodiment, in step 4), the ethylenediamine tetramethylene corresponding to each ton of pulp in each concentration is selected from one to four. The amount of phosphonic acid is 30g, and the amount of ethylenediamine tetramethylene phosphonic acid corresponding to each ton of pulp in the selection five to the selection seven is 20g.

Example Embodiment

[0045] Example 3

[0046] This example uses a certain high-calcium fluorite ore in Fujian as raw material, and the sample mainly contains 25.46% CaF 2 , 11.71%CaCO 3 . The main gangue minerals are calcite, among which the content of calcite is high and it is difficult to sort.

[0047] The positive flotation method used in this embodiment is basically the same as that in embodiment 1, the difference is only that in this embodiment, in step 4), the ethylenediaminetetramethylene corresponding to each ton of pulp in each concentration is selected from one to four. The dosage of phosphonic acid is 15g, and the dosage of ethylenediamine tetramethylene phosphonic acid per ton of pulp in each selection of selection five to selection 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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