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Application of a kind of phosphoric acid compound

A phosphonic acid and compound technology, applied in solid separation, flotation and other directions, can solve the problems of low grade and recovery rate of useful concentrate, difficult separation, etc., to avoid accompanying flotation, less dosage, tailings and tailings. The effect of easy water treatment

Active Publication Date: 2022-07-19
HUNAN NONFERROUS METALS XINTIANLING WOLFRAM MINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at problems such as calcium-containing useful minerals (such as scheelite) and calcium-containing minerals (such as calcite) having similar surface physical and chemical properties, difficult separation, and low grade and recovery rate of useful concentrates, the first purpose of the present invention is to provide a phosphoric acid compound (The present invention is also referred to as inhibitor) as a method of flotation inhibitor for calcium-containing gangue, aiming to achieve selective suppression of calcium-containing gangue

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  • Application of a kind of phosphoric acid compound
  • Application of a kind of phosphoric acid compound
  • Application of a kind of phosphoric acid compound

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Inhibitor synthesis steps: liquid ammonia, It was mixed with cyclohexamethylenetetramine in a molar ratio of 2.0:1.0:0.1, reacted at 70°C for 2.5h, and then added with equimolar After 8h of reaction, add ethanol and centrifuge to obtain the inhibitor of formula 1-A (the preparation method of this agent does not constitute the limitation of the protection scope of the present invention, and it can also be prepared by other existing means, or existing commercial products can be used. ).

[0065] To use the inhibitor of formula 1-A (also referred to as inhibitor in this case) in the flotation of scheelite, the specific steps are as follows:

[0066] 1) Preparation of flotation pulp: add 2 g of mixed ore (scheelite and calcite mass ratio of 1:1) with a particle size of -74+38 μm and 35 ml of deionized water into the flotation cell, and stir at 1704 r / min. 2min to get flotation pulp;

[0067] 2) Add inhibitor and collector (sodium oleate) in turn, wherein the amount o...

Embodiment 2

[0073] The synthesis procedure of the inhibitor was the same as that of Example 1. The inhibitor was used in the flotation of a scheelite ore in Chenzhou, Hunan, where the scheelite grade of the ore was WO 3 0.40%, calcite grade CaCO 3 is 11.02%, including the following steps:

[0074] 1) Crushing the scheelite ore, and grinding the ore with a ball mill to a fineness of -74μm, which accounts for 75% of the ore quality;

[0075] 2) Prepare the ore powder into ore pulp with a concentration of 40% (mass content), add 250g / t inhibitor (formula 1-A), stir for 3min and then add 150g / t sodium oleate as a collector, stir for 3min Adjust the pH of the pulp to 11 with sodium carbonate;

[0076] 3) Inflatable flotation for 6 minutes, and after one roughing, scheelite rough concentrate is obtained. Among them, the tungsten grade is WO 3 2.15%, recovery 85.16%; CaCO 3 was 4.02%, and the recovery rate was 5.74%.

Embodiment 3

[0078] Inhibitor synthesis steps: liquid ammonia, Mixed with cyclohexamethylenetetramine in a molar ratio of 2.2:0.9:0.1, reacted at 75°C for 2.0h, and then added with equimolar After 7h of reaction, add ethanol and centrifuge to get the inhibitor

[0079] This embodiment is directed to a certain low-grade scheelite in Jiangxi, where the grade of scheelite is WO 3 0.21%, calcite grade CaCO 3 is 14.32%, and the specific steps are as follows:

[0080] 1) Crushing the scheelite ore, and grinding the ore with a ball mill to a fineness of -0.074mm, which accounts for 70% of the ore quality;

[0081] 2) Prepare the ore powder into pulp, add 200g / t inhibitor (formula 1-B), add 100g / t sodium oleate after stirring for 3min, and adjust the pH of the pulp to 8 with hydrochloric acid after stirring again for 3min;

[0082] 3) Air-filled flotation for 5 minutes to obtain scheelite coarse concentrate; then the scheelite coarse concentrate is subjected to four beneficiation, wherei...

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Abstract

The invention belongs to the technical field of mineral flotation, and in particular relates to the application of a phosphoric acid compound. The compound of formula 1 and its salt are used as flotation inhibitors for inhibiting the flotation of calcium-containing gangue minerals. . The structural compound of the present invention, based on the synergy of molecular structure, can unexpectedly exhibit a special selective inhibitory effect on calcite, and can be used for the flotation separation of calcite and other useful minerals, especially calcium-containing minerals.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation, and in particular relates to a method for inhibiting refractory calcium-containing gangue ore. Background technique [0002] Calcium-containing useful minerals such as scheelite, the main component of which is calcium tungstate (CaWO 4 ), where WO 3 The content is 80.53%. Its colors are gray-white, yellow-brown, green and reddish. As a strategic resource, tungsten is widely used in various fields of national defense and national economy, and is known as "industrial tooth". However, there are very few tungsten resources in the world. 70% of the world's tungsten resources are concentrated in my country. At present, the country has included tungsten metal in the list of strategic reserves. With the gradual exhaustion of high-grade wolframite resources, the focus of tungsten resources mining and dressing has shifted from wolframite to scheelite. Since scheelite is often accompanied by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/014B03D101/06B03D103/04
CPCB03D1/014B03D2201/06B03D2203/04
Inventor 王光华徐凤平肖永红王晴红曾林吴远婵孙伟王建军高志勇江哲伊
Owner HUNAN NONFERROUS METALS XINTIANLING WOLFRAM MINE
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