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A method for selective desorption and recycling of mineral surface agents

A selective and medicament-based technology, applied in flotation, solid separation, etc., can solve the problems of high waste water treatment cost, low efficiency, and high cost of chelating chemicals in smelting enterprises, so as to achieve sustainable recycling and protect the ecological environment , Guarantee the effect of economic benefit and sustainable development

Active Publication Date: 2021-05-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for selective desorption of mineral surface agents to solve the problems of high cost, low efficiency and high cost of wastewater treatment in smelting enterprises for chelating agents

Method used

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  • A method for selective desorption and recycling of mineral surface agents
  • A method for selective desorption and recycling of mineral surface agents
  • A method for selective desorption and recycling of mineral surface agents

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The sulfur tailings (tungsten raw ore) from a dressing plant in Chenzhou, Hunan Province were subjected to tungsten flotation, of which WO 3 The grade is 0.40%, the gangue is mainly garnet and calcite, the amount of roughing collector is 600g / t of lead nitrate, 500g / t of benzyl hydroxamic acid, the pH of the pulp flotation is 9.0, the flotation is 6min, and the flotation machine The stirring speed is 2000r / min, and the flotation results (without concentrate) are shown in Table 1. Then, put the above-mentioned tungsten concentrate slurry into the agitator, adjust the slurry concentration to 25%, and the stirring speed to 2700r / min, then add desorbent sodium hydroxide 60g / t (for tungsten raw ore), and after stirring for 15min, the slurry immediately Enter the centrifuge to concentrate, and the centrifugal concentrate containing a large amount of beneficial collectors is returned to the original flotation process for use. Concentrate color see figure 1shown. After addin...

Embodiment 2

[0045] The tin ore (tin raw ore) taken from an old dressing plant in Yunnan is subjected to flotation, wherein the Sn grade is 0.55%, the gangue is mainly quartz and feldspar, and the amount of roughing collector is 500g / t of lead nitrate, benzene Hydroxamic acid is 700g / t, the amount of inhibitor water glass is 300g / t, the slurry flotation pH is 8.0, No. 2 oil is 40g / t, and the speed is 2000r / min. The flotation results (without concentrate) are shown in Table 2. Then, put the above-mentioned tin concentrate pulp into the agitator, adjust the pulp concentration to 30%, and the stirring speed to 2800r / min, then add desorbent hydrochloric acid 80g / t (for tin ore), after stirring for 20min, the pulp enters the centrifuge immediately Concentrated by machine, the centrifuge concentrate containing a large amount of beneficial collectors is returned to the original flotation process for use. After adding the concentrate, the dosages of lead nitrate and benzohydroxamic acid were reduc...

Embodiment 3

[0049] The rare earth ore (bastnaesite raw ore) taken from a dressing plant in Mianning, Sichuan, was subjected to flotation. The REO grade was 3.06%, and the gangue was mainly feldspar, quartz, barite and fluorite. The dosage is 3000g / t, the collector salicylic hydroxamic acid dosage is 4000g / t, the No. 2 oil is 40g / t, the speed is 2000r / min, and the flotation results (without concentrate) are shown in Table 3. Then, put the above-mentioned rare earth concentrate ore slurry into the agitator, adjust the slurry concentration to be 35%, and the stirring speed is 2600r / min, then add desorbent sodium hydroxide 80g / t (for bastnaesite raw ore), after stirring for 25min, The ore pulp then enters the centrifuge to concentrate, and the centrifugal concentrate containing a large amount of beneficial collector is returned to the original flotation process for use. After adding the concentrate, the dosage of salicylic hydroxamic acid was reduced to 3000g / t, and the other flotation condit...

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Abstract

The invention belongs to the technical field of mineral flotation and medicament reuse, and specifically discloses a method for selective desorption of medicaments on the surface of minerals. A desorption agent is added to the ore pulp of minerals with chelating agents on the surface, and the minerals and chelating agents are assisted by high-speed stirring. The chemical is desorbed, followed by solid-liquid separation to obtain minerals and recovered chemical; the chemical includes a chelating collector; the desorbent is acid or alkali; and the amount of the desorbent is 30-100g / t. The invention also provides a method for recycling the recovered medicine. The technical scheme of the present invention utilizes the chemical-physical synergistic effect of the desorbent and the high-speed stirring to improve the selective desorption and separation of minerals and pharmaceuticals, not only that, but also helps to avoid damage to pharmaceuticals and minerals. It can effectively recover the chemicals on the mineral surface, improve the subsequent mineral concentrate smelting process and reduce the corresponding water treatment cost.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation and hydrometallurgy, and particularly relates to a method capable of selectively desorbing beneficial agents on mineral surfaces, including a desorption method and a recycling method. Background technique [0002] In the field of flotation, the types of mineral collectors are mainly divided into two types: fatty acid system and chelating agent system. The fatty acid system has low reagent cost but poor selectivity, and the chelating agent system has high reagent cost but good selectivity. However, the fatty acid system is usually accompanied by the use of a large amount of inhibitors, such as water glass, to increase the grade of the target mineral concentrate, which will lead to difficulties in tailings settlement and tailings water reuse. With the improvement of environmental protection requirements and higher grade requirements of some mineral concentrate products, such as tungsten, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/12B03D101/02B03D103/02
CPCB03D1/12B03D2201/02B03D2203/02
Inventor 孙伟王建军高志勇胡岳华陶黎明江哲伊汪聪
Owner CENT SOUTH UNIV
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