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Method of preparing inorganic high molecular flocculant polysilicate ferric zinc from copper tailings

A technology of inorganic polymer and polysilicate iron, which is applied in the field of solid waste utilization research, can solve the problems that hinder the sustainable development of copper smelting enterprises, the tailings are not well utilized, and the cost of raw materials is high, so as to achieve good social benefits and economic benefits, enhance the use of added value, and reduce pollution

Pending Publication Date: 2017-09-15
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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Problems solved by technology

[0003] The relatively mature copper slag treatment method is to recover copper through the "slow cooling-fine grinding-flotation" process of copper smelting slag, but the tailings after flotation (referred to as "copper tailings") have not been well utilized.
A large amount of iron-rich copper tailings is piled up, which not only causes a great waste of resources, but also occupies land, pollutes the environment, and hinders the sustainable development of copper smelting enterprises
[0004] At present, the method for preparing iron-zinc polysilicate is mainly to use sodium silicate or water glass as silicon source, after acidification and activation to obtain polysilicic acid, then add iron-zinc source, and obtain polysilicate iron flocculant through aging, The raw material cost that this method adopts is higher

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  • Method of preparing inorganic high molecular flocculant polysilicate ferric zinc from copper tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The iron content of the copper tailings used in this embodiment is 40wt%, the silicon dioxide content is 34wt%, and the zinc content is 2wt%.

[0033] refer to figure 1 , adding copper tailings to the sulfuric acid solution with a concentration of 4mol / L, the ratio of copper tailings and sulfuric acid solution is 1:5, and then adding copper tailings to the solution at a concentration of 15% of the mass of copper tailings It is 30wt% hydrogen peroxide. Place the above solid-liquid mixed solution in a water bath, stir for 5 hours under the condition of constant temperature heating in a water bath at 100°C to dissolve the copper tailings, and then let it stand for 3 hours to obtain a mixed solution of the lower sediment and the supernatant;

[0034] Dilute the sodium silicate solution (water glass) with water to a concentration of about 15 wt%, and measure the molecular weight of polysilicic acid by viscometry at the same time. pH value to pH=1 to obtain an acidic sodium...

Embodiment 2

[0039] The iron content of the copper tailings used in this embodiment is 40wt%, the silicon dioxide content is 35wt%, and the zinc content is 2.5wt%.

[0040] refer to figure 1 , adding copper tailings to sulfuric acid solution with a concentration of 7mol / L, the ratio of copper tailings to sulfuric acid solution is 1:3, and then adding copper tailings to the solution at a concentration of 10% of the mass of copper tailings It is 40wt% hydrogen peroxide. Place the above solid-liquid mixed solution in a water bath, stir for 3 hours under the condition of constant temperature heating in a water bath at 100°C to dissolve the copper tailings, and then let it stand for 1 hour to obtain a mixed solution of the lower sediment and the supernatant;

[0041] Dilute the sodium silicate solution with water to a concentration of about 15 wt%, and measure the molecular weight of polysilicic acid by viscometry at the same time. pH = 2, the acidic sodium silicate solution is obtained, read...

Embodiment 3

[0046] The iron content of the copper tailings used in this embodiment is 38wt%, the silicon dioxide content is 34wt%, and the zinc content is 1.5wt%.

[0047] refer to figure 1 , adding copper tailings to a sulfuric acid solution with a concentration of 7mol / L, the ratio of copper tailings to sulfuric acid solution is 1:4, and then adding 10% of the mass of copper tailings to the solution It is 38wt% hydrogen peroxide. Place the above solid-liquid mixed solution in a water bath, stir for 3 hours under the condition of constant temperature heating in a water bath at 100°C to dissolve the copper tailings, and then let it stand for 1 hour to obtain a mixed solution of the lower sediment and the supernatant;

[0048] Dilute the sodium silicate solution with water to a concentration of about 15 wt%, and measure the molecular weight of polysilicic acid by viscometry at the same time. pH = 1.5, get an acidic sodium silicate solution, ready to use; under normal circumstances, polys...

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Abstract

The invention provides a method for preparing an inorganic macromolecule flocculant polysilicate ferric zinc from copper tailing slag. Specifically, the copper tailings are heated, stirred, and allowed to stand under the action of acid and hydrogen peroxide to dissolve the copper tailings; the supernatant with the dissolved copper tailings is mixed with an acidic sodium silicate solution, and then stirred, reacted, and aged and other steps to obtain the inorganic polymer flocculant polyzinc iron silicate. The invention adopts the waste copper tailings as raw materials to prepare the polysilicate iron-zinc flocculant, which can greatly reduce the cost, and also utilizes the waste copper tailings.

Description

technical field [0001] The invention relates to the field of solid waste utilization research in the non-ferrous metallurgy industry, and more specifically, the invention relates to a method for preparing an inorganic polymer flocculant polysilicate ferric zinc from copper tailings. Background technique [0002] my country's copper output ranks first in the world, and more than 95% of copper is produced through pyrometallurgy, which produces a large amount of copper slag. The cumulative stock of copper slag in my country has exceeded 50 million tons. In 2015, my country's copper output reached 7.96 million tons, of which copper produced by pyrometallurgy accounted for more than 95% of the total output, and every ton of copper produced by pyrometallurgy produced about 2 tons of copper slag on average, so in 2015 my country's copper slag output has reached more than 15 million tons. Copper slag contains about 40% iron, which is higher than the grade of iron ore used in domest...

Claims

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Application Information

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IPC IPC(8): C02F1/52C01B33/20C02F101/22
CPCC02F1/5245C01B33/20C02F2101/22
Inventor 丁银贵王岩刘占华陈文亮薛逊王欣曹志成吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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