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A material for acid-resistant bricks prepared from waste and its preparation method

A technology for acid-resistant bricks and waste, which is applied in the field of materials for acid-resistant bricks and its preparation, which can solve the problems of non-environmental protection and high cost of hazardous waste treatment, and achieve the effects of saving costs, reducing waste treatment costs, and maximizing the use of resources

Active Publication Date: 2020-11-20
ZHAOQING SANJIANG SILICON MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, these filter residues were entrusted to a third party for hazardous waste treatment. The cost of hazardous waste treatment is extremely high and it is not environmentally friendly. In order to realize waste utilization, energy conservation and environmental protection, we urgently need to find a suitable method for the secondary utilization of these waste filter residues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1. A material for acid-resistant bricks prepared from waste

[0023] The preparation method of using waste to prepare materials for acid-resistant bricks includes the following steps:

[0024] S1, the sulfuric acid solution that the amount concentration of configuration substance is 2mol / L;

[0025] S2. Add the filter residue after liquefaction and filtration of solid sodium silicate into a ball mill, pulverize it to 5 μm, add it to a stirring tank, add deionized water, and stir for 5 minutes at a speed of 500 rpm to configure the concentration of the substance 0.9mol / L alkaline solution;

[0026] S3. Add the alkali solution prepared in step S2 into the reaction tank, heat it with steam to 70°C, and then 3 Add the sulfuric acid solution that step S1 makes dropwise at the speed of / h, stop dripping sulfuric acid solution when the pH value in the reaction tank is 4. Steam heating to 80°C again and aging for 15 minutes to obtain composite material particles;

...

Embodiment 2

[0029] Example 2. A material for acid-resistant bricks prepared from waste

[0030] The preparation method of using waste to prepare materials for acid-resistant bricks includes the following steps:

[0031] S1, the sulfuric acid solution that the amount concentration of configuration substance is 2.5mol / L;

[0032] S2. Add the filter residue after liquefaction and filtration of solid sodium silicate into a ball mill, pulverize it to 5 μm, add it to a stirring tank, add deionized water, and stir for 5 minutes at a speed of 500 rpm to configure the concentration of the substance 1.2mol / L alkaline solution;

[0033] S3. Add the alkali solution prepared in step S2 into the reaction tank, heat it with steam to 75°C, and then 3 Add the sulfuric acid solution that step S1 makes dropwise at the speed of / h, stop dripping sulfuric acid solution when the pH value in the reaction tank is 5. Steam heating to 85°C again and aging for 15 minutes to obtain composite material particles; ...

Embodiment 3

[0036] Example 3. A material for acid-resistant bricks prepared from waste

[0037] The preparation method of using waste to prepare materials for acid-resistant bricks includes the following steps:

[0038] S1, the sulfuric acid solution that the amount concentration of configuration substance is 3mol / L;

[0039] S2. Add the filter residue after liquefaction and filtration of solid sodium silicate into a ball mill, pulverize it to 5 μm, add it to a stirring tank, add deionized water, and stir for 5 minutes at a speed of 500 rpm to configure the concentration of the substance 1.5mol / L alkaline solution;

[0040] S3. Add the alkali solution prepared in step S2 into the reaction tank, heat it with steam to 80°C, and then 3 Add the sulfuric acid solution that step S1 makes dropwise at the speed of / h, stop dripping sulfuric acid solution when the pH value in the reaction tank is 6. Steam heating to 90°C again and aging for 15 minutes to obtain composite material particles;

...

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Abstract

The invention belongs to the technical field of materials for acid-resistant bricks, and in particular relates to a material for acid-resistant bricks prepared by using waste and a preparation method thereof. In the present invention, after the solid sodium silicate is liquefied and filtered, the remaining filter residue is ground to 5 μm, reacted with dilute sulfuric acid at 70-80 DEG C, and the pH value of the reaction end point is controlled to be 4-6, and aged at 80-90 DEG C for 15 minutes , The composite acid-resistant brick material with perlite and silica is obtained after filter-press washing, flash drying and airflow crushing. The preparation method of the acid-resistant brick material prepared by using waste provided by the invention reduces the discharge of pollutants, turns waste into treasure, maximizes the utilization of resources, and saves costs; it can be applied to the preparation of bricks, and can improve the performance of bricks. Acid corrosion resistance, and can improve the thermal insulation effect of bricks, with good social benefits.

Description

technical field [0001] The invention belongs to the technical field of materials for acid-resistant bricks, and in particular relates to a material for acid-resistant bricks prepared from waste and a preparation method thereof. Background technique [0002] Due to its stable chemical properties, high dispersibility, high purity and other excellent physical and chemical properties, silica is widely used in the fields of glass, ceramic glaze, refractory materials, and food additives. The silica prepared by the precipitation method has the advantages of good dispersibility, strong suspension ability, stable physical and chemical properties, non-toxic and non-polluting, etc. Filter residue, wherein the main components of the filter residue are perlite and sodium silicate. In the past, these filter residues were entrusted to a third party for hazardous waste treatment. The cost of hazardous waste treatment is extremely high and it is not environmentally friendly. In order to rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/132C04B33/13
CPCC04B33/13C04B33/132Y02P40/60
Inventor 郑松玲王宪伟庹文喜王义品蒋建华
Owner ZHAOQING SANJIANG SILICON MATERIALS CO LTD
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