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Method for preparing sodium silicate and iron concentrate powder from copper-nickel slag

A technology of copper-nickel slag and water glass, which is applied to the improvement of process efficiency, alkali metal silicate, silicate, etc., can solve the problems of large loss of sealing materials, high cost of production process, and requirements of reaction conditions, etc., and is easy to achieve The effect of operation, saving raw materials, and simple preparation method

Inactive Publication Date: 2015-04-29
斯莱登(北京)化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of dry production process is high, and the operation is difficult to master
In the traditional wet production method, the main problem is that the reaction conditions are too high, the sealing material consumption is quite large, the equipment investment is also large, and the water glass with a high mold value cannot be produced.

Method used

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  • Method for preparing sodium silicate and iron concentrate powder from copper-nickel slag
  • Method for preparing sodium silicate and iron concentrate powder from copper-nickel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 100kg of copper-nickel slag (120 mesh) into the first-stage leaching tank, add 40kg of water and 60kg of sulfuric acid at the same time, stir and leaching at 60°C for 30min; Add 400kg of water, stir and extract at room temperature for 45min.

[0029] Use a centrifuge for solid-liquid separation I, rinse the leached residue I with water once, return the washed liquid to the first-stage leaching tank, and carry out the next step of recovery treatment for the leached residue I. Put 400kg of leachate I into the inflatable air oxidation tank through the acid leach conduit for oxidation.

[0030] Take 200kg of the oxidized liquid, add 1.3kg of copper-nickel slag, the pH of the solution is 3.0; use a filter press to perform solid-liquid separation II, and wash 52kg of the separated slag II with water three times until there is no sulfate ion in the washing liquid.

[0031] After washing, 50kg of separated slag II was baked at 105°C for 2 hours, then put into a roaster for...

Embodiment 2

[0034] Put 100kg of copper-nickel slag (80 mesh) into the first-stage leaching tank, add 30kg of water and 70kg of sulfuric acid at the same time, stir and leaching at 40°C for 30min; Add 400kg of water, stir and leaching for 60min at room temperature.

[0035] Use a centrifuge for solid-liquid separation I, rinse the leached residue I with water once, return the washed liquid to the first-stage leaching tank, and carry out the next step of recovery treatment for the leached residue I. Put 400kg of leachate I into the inflatable air oxidation tank through the acid leach conduit for oxidation.

[0036] Take 200kg of the oxidized liquid, add 1.4kg of copper-nickel slag, the pH of the solution is 3.2; use a filter press to perform solid-liquid separation II, and wash 54kg of the separated slag II with water three times until there is no sulfate ion in the washing liquid.

[0037] After washing, 50kg of separated slag II was baked at 105°C for 2 hours, then put into a roaster for...

Embodiment 3

[0040]Add 100kg of copper-nickel slag (120 mesh) into the first-stage leaching tank, add 35kg of water and 65kg of sulfuric acid at the same time, stir and leaching at 50°C for 40min; Add 400kg of water, stir and leaching for 60min at room temperature.

[0041] Use a centrifuge for solid-liquid separation I, rinse the leached residue I with water once, return the washed liquid to the first-stage leaching tank, and carry out the next step of recovery treatment for the leached residue I. Put 400kg of leachate I into the inflatable air oxidation tank through the acid leach conduit for oxidation.

[0042] Take 200kg of the oxidized liquid, add 1.5kg of copper-nickel slag, the pH of the solution is 3.3; use a filter press to perform solid-liquid separation II, and wash 55kg of the separated slag II with water for 3 times until there is no sulfate ion in the washing liquid.

[0043] After washing, 55kg of separated slag II was baked at 105°C for 2 hours, and then put into a roaster...

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Abstract

The invention discloses a method for preparing sodium silicate and iron concentrate powder from copper-nickel slag. The method comprises the steps of leaching out copper-nickel slag subjected to ore grinding treatment through a step-by-step concentration difference method; performing solid-liquid separation to obtain a leachate I and a leaching residue I; oxidizing Fe<2+> ions in the leachate I into Fe<3+> ions under an acidic condition by taking air as an oxidant; adding a certain amount of the copper-nickel slag into the oxidized leachate to adjust the acidity until all the iron ions are separated out; performing solid-liquid separation to obtain a separated liquid II and a separated residue II; performing washing, low-temperature roasting, crushing and grinding on the separated residue II to obtain iron concentrate powder; adjusting the pH value of the separated liquid II; performing solid-liquid separation to obtain a separated liquid III and a separated residue III; and performing size mixing on the separated residue III, and then enabling the separated residue III to react with a sodium hydroxide solution to prepare sodium silicate. Through the method disclosed by the invention, the iron content of the prepared iron concentrate powder is high, and the sodium silicate with a high modulus can be obtained at the same time.

Description

technical field [0001] The invention relates to a method for preparing water glass and fine iron powder from copper-nickel slag, which belongs to the technical field of resource chemistry and environmental engineering. Background technique [0002] Iron concentrate powder is also called iron powder. Iron ore (ore containing iron element or iron compound) is processed into ore powder by crushing, grinding, ore dressing, etc., called iron concentrate powder. Iron concentrate powder is mainly used in powder metallurgy, machinery parts manufacturing and other industries. At present, the sources of raw materials for domestic production of iron concentrate mainly include: pyrite and ferrous sulfate, alumina red mud, gas mud (blast furnace dust), sulfuric acid slag, iron ore, and a few raw materials come from rare earth tailings, cyanide extraction, etc. Gold waste, non-ferrous mineral processing waste, industrial iron-bearing tailings, Gobi sand iron ore, sea sand iron ore, steel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/00C22B3/06C01B33/32
CPCY02P10/20
Inventor 莫红兵段金城刘耀驰
Owner 斯莱登(北京)化工科技有限公司