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Method for preparing water glass by using copper and nickel slag

A copper-nickel slag and water glass technology, applied in the direction of alkali metal silicate, silicate, etc., can solve the problems of no modulus water glass, too high reaction conditions, large loss of sealing materials, etc. Product specifications, low cost and easy availability, the effect of preventing silicone gel

Inactive Publication Date: 2014-05-21
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

For 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 water glass with a high modulus cannot be produced.

Method used

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  • Method for preparing water glass by using copper and nickel slag
  • Method for preparing water glass by using copper and nickel slag
  • Method for preparing water glass by using copper and nickel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Leaching by step-by-step concentration method

[0049] Put the ground 200-mesh copper-nickel slag ore powder into the first-stage thick slurry leaching tank, and add water and acid in proportion (the amount of acid added is 0.9 to 1.4 times of the theory), and adjust the acid concentration in the pulp during leaching. 30-50%, leaching at 30-60°C for 10-50 minutes, pour the first-stage leaching thick slurry into the second-stage leaching tank, add water in proportion, and keep the pulp acid concentration at 6%-15% for 40-50% 80min, solid-liquid separation I was carried out to obtain leachate I and leach residue I;

[0050] 2. Step by step iron removal

[0051] Using air as the oxidant, the Fe in the leaching solution I 2+ Ions are oxidized to Fe 3+ Add 200-mesh copper-nickel slag with a liquid-solid ratio of 200 after the ions to adjust the pH to 3.0, and perform solid-liquid separation II to obtain separation liquid II and separation slag II;

[0052] 3. Preparat...

Embodiment 2

[0055] 1. Leaching by step-by-step concentration method

[0056] Add the ground 300 mesh copper-nickel slag slag powder into the first-stage thick slurry leaching tank, and add water and acid in proportion (the amount of acid added is 1.0 to 1.8 times of the theory), and adjust the acid concentration in the pulp during leaching. 40-70%, leaching at 60-90°C for 50-90 minutes, pour the first-stage leaching thick slurry into the second-stage leaching tank, add water in proportion, and keep the pulp acid concentration at 15%-25%. 80min, solid-liquid separation I was carried out to obtain leachate I and leach residue I;

[0057] 2. Step by step iron removal

[0058] Using oxygen as the oxidant, the Fe in the leaching solution I 2+ Ions are oxidized to Fe 3+ Add 300-mesh copper-nickel slag with a liquid-solid ratio of 300 after the ions to adjust the pH to 3.5, and perform solid-liquid separation II to obtain separation liquid II and separation slag II;

[0059] 3. Preparation o...

Embodiment 3

[0062] 1. Leaching by step-by-step concentration method

[0063] Add the ground 300 mesh copper-nickel slag slag powder into the first-stage thick slurry leaching tank, and add water and acid in proportion (the amount of acid added is 1.0 to 1.8 times of the theory), and adjust the acid concentration in the pulp during leaching. 40-70%, leaching at 60-90°C for 50-90 minutes, pour the first-stage leaching thick slurry into the second-stage leaching tank, add water in proportion, and keep the pulp acid concentration at 15%-25%. 80min, solid-liquid separation I was carried out to obtain leachate I and leach residue I;

[0064] 2. Step by step iron removal

[0065] Using hydrogen peroxide as an oxidant, the Fe in the leaching solution I 2+ Ions are oxidized to Fe 3+ Add 300-mesh copper-nickel slag with a liquid-solid ratio of 350 after the ions to adjust the pH to 5.0, and perform solid-liquid separation II to obtain separation liquid II and separation slag II;

[0066] 3. Pre...

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Abstract

The invention discloses a method for preparing water glass by using copper and nickel slag. The method comprises the following steps: 1) leaching the copper and nickel slag (obtained after ore grinding treatment) step by step, and then performing solid-liquid separation I to obtain leached solution I and leached slag I; 2) oxidizing Fe<2+> ions in the liquid phase into Fe<3+> ions in the presence of acid, adding the original slag to regulate the pH value, and then performing solid-liquid separation II to obtain separated solution II and separated slag II; 3) continuously adding the copper and nickel slag into the separated solution II to regulate the pH value, and performing solid-liquid separation III to obtain separated solution III and separated slag III; and 4) washing the separated slag III, blending the slurry, pumping into an autoclave, pumping a sodium hydroxide solution required in the process, and controlling the pressure and temperature in the autoclave to separate silicon out, thus obtaining the water glass. The method has the advantages of use of readily available raw materials, safe and simple operation and low equipment investment, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid wastes, and in particular relates to a method for preparing water glass from copper-nickel slag, especially the leaching solution of copper-nickel slag. Background technique [0002] Water glass is a kind of sodium polysilicate, which is very versatile. In the chemical system, it is used to manufacture various silicate products such as silica gel, white carbon black, zeolite molecular sieve, sodium metasilicate pentahydrate, silica sol, layer silicon and instant powdered sodium silicate, potassium sodium silicate, etc. Basic raw material for silicon compounds. In economically developed countries, there are more than 50 kinds of deep-processing series products using sodium silicate as raw material, and some of them have been applied in high-tech, precision and cutting-edge fields. Water glass is used in the petroleum industry to make silica-alumina catalysts; it is used in the ch...

Claims

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Application Information

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