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

A waste hydrochloric acid, porous brick technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as failure of external drainage, incomplete treatment, damage to the environment, etc., to improve the working conditions of the kiln , The effect of shortening the drying cycle and reducing the bulk density

Inactive Publication Date: 2007-05-16
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 stati...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[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 waste iron-containing hydrochloric acid 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 weight of iron ore ...

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), react the waste iron-containing hydrochloric acid with waste iron scraps, iron ore waste residue, etc., so that the pH value reaches 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 inferior coal, a...

Embodiment 3

[0046] Example 3 A porous brick and hollow brick prepared from iron-containing waste hydrochloric acid solution according to the present invention

[0047] Composition: 1), PH value is 6.0 appropriate amount of waste hydrochloric acid solution containing iron;

[0048] 2) 40 parts by weight of clay, 50 parts by weight of shale, 15 parts by weight of cinder and coal gangue mixed, and 2 parts by weight of iron ore waste; 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), react the waste iron-containing hydrochloric acid with waste iron scraps, iron ore waste residue, etc., so that the pH value reaches 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 parts by weight ...

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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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IPC IPC(8): C04B22/12C04B18/08C04B14/10C04B18/14
CPCY02W30/91
Inventor 王铁林
Owner 王铁林
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