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Porous brick, hollow brick prepared from waste hydrochloric acid liquid containing iron and its preparation method

A technology of waste hydrochloric acid and porous bricks, which is applied in the field of hollow bricks and its preparation, and porous bricks for construction, which can solve the problems of unreachable drainage, incomplete treatment, and environmental damage, and improve the working conditions of the kiln, shorten the drying cycle, The effect of weight reduction

Inactive Publication Date: 2008-05-28
王铁林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to incomplete treatment and a large amount of waste acid, the external drainage of the steel plant could not meet the standard
According to rough statistics, millions of tons of iron-containing waste hydrochloric acid are discharged by this method every year, which greatly pollutes and destroys the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 A kind of porous brick and hollow brick prepared with iron-containing waste hydrochloric acid solution of the present invention

[0025] Composition: 1), pH value is 5.5 appropriate amount of iron-containing waste hydrochloric acid solution;

[0026] 2) 30 parts by weight of clay, 60 parts by weight of shale, 10 parts by weight of cinder, and 3 parts by weight of iron ore waste slag; the particles of the above-mentioned various materials are crushed to brick grade powder, and the particles are less than 1 mm.

[0027] Preparation:

[0028] 1) Crush the particles of clay, shale, cinder and iron ore waste materials to less than 1 mm;

[0029] 2), reacting the iron-containing waste hydrochloric acid solution with waste iron filings, iron ore waste residue, etc., to make the pH value reach 5.5;

[0030] 3), the supernatant in step 2), 30 parts by weight of the above-mentioned clay, 60 parts by weight of shale, 10 parts by weight of cinder, and 3 parts by weig...

Embodiment 2

[0035] Embodiment 2 A kind of porous brick and hollow brick prepared with iron-containing waste hydrochloric acid solution of the present invention

[0036] Composition: 1), pH value is 6.8 appropriate amount of waste hydrochloric acid solution containing iron;

[0037] 2) 50 parts by weight of clay, 40 parts by weight of shale, 20 parts by weight of low-quality coal, and 1 part by weight of iron ore waste residue; the particles of the above-mentioned various materials are crushed to brick grade powder, and the particles are less than 1 mm.

[0038] Preparation:

[0039] 1) Crush the particles of clay, shale, low-quality coal and iron ore waste materials to less than 1 mm;

[0040] 2), reacting the iron-containing waste hydrochloric acid solution with waste iron filings, iron ore waste slag, etc., to make the pH value reach 6.8;

[0041] 3), the supernatant in step 2), 50 parts by weight of the above-mentioned clay, 40 parts by weight of shale, 20 parts by weight of low-qual...

Embodiment 3

[0046] Embodiment 3 A kind of porous brick and hollow brick prepared with iron-containing waste hydrochloric acid solution of the present invention

[0047] Composition: 1), a pH value of 6.0, an appropriate amount of iron-containing waste hydrochloric acid;

[0048] 2) 40 parts by weight of clay, 50 parts by weight of shale, 15 parts by weight of cinder and coal gangue mixed, 2 parts by weight of iron ore waste residue; the particles of the above-mentioned various materials are crushed to brick grade powder, and the particles are less than 1 mm.

[0049] Preparation:

[0050] 1) Crush the particles of clay, shale, cinder, coal gangue and iron ore waste materials to less than 1 mm;

[0051] 2), reacting the iron-containing waste hydrochloric acid solution with waste iron filings, iron ore waste residue, etc., to make the pH value reach 6.0;

[0052]3), the supernatant in step 2) is mixed with 40 parts by weight of the above-mentioned clay, 50 parts by weight of shale, 15 par...

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PUM

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Abstract

The invention discloses a porous brick and hollow brick with waste ferric alcaine liquid, which comprises the following parts: 30-50% clay, 40-60% shale, 10-20% coal slag, inferior coal, coal ash, coal waste or their mixture, 1-3% waste of ferric ore, wherein the particle of each material is less than 1mm. The preparing method comprises the following steps: stirring waste ferric alcaine liquid and supernatant reacted by waste iron filling and ferric ore waste and all components completely; blending evenly; aging; compressing; stirring; squeezing; cutting mould; piling mould; stewing; drying; sintering; cooling naturally.

Description

technical field [0001] The invention relates to a porous brick for building, a hollow brick and a preparation method thereof prepared by using waste iron-containing hydrochloric acid solution and clay as raw materials. Background technique [0002] In the production process of cold-rolled strip steel, it is necessary to treat the surface of the steel. As the washing progresses, the acid concentration gradually decreases and the iron concentration continues to rise. When the acid concentration in the solution drops to 6%-8%, and the generated iron concentration exceeds 20%-25%, the pickling rate decreases and the pickling solution must be replaced. . Since the price of hydrochloric acid is cheaper than sulfuric acid, and hydrochloric acid pickling has more prominent advantages than sulfuric acid pickling, the pickling medium has been gradually replaced by hydrochloric acid in recent years. But both have the problem of waste acid treatment, and waste acid treatment measures ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/12C04B18/08C04B14/10C04B18/14
CPCY02W30/91
Inventor 王铁林
Owner 王铁林
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