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Method for producing ceramsite for thermal insulation block by using air-quenched steel slag

A technology of thermal insulation blocks and steel slag, which is applied in the field of metallurgical slag treatment and resource utilization, can solve the problems of steel slag polluting the environment, achieve the effects of preventing environmental pollution, reducing production costs, and promoting the construction of ecological civilization

Active Publication Date: 2017-01-18
宝武环科武汉金属资源有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing ceramsite for thermal insulation blocks by using wind-quenched steel slag. The hollow blocks produced by this method have properties such as thermal insulation, shock resistance, frost resistance, and fire resistance, and solve the problems caused by the accumulation of steel slag at present. The problem of environmental pollution increases the added value of steel slag utilization. At the same time, the production method is simple, energy-saving and environmentally friendly, and low in cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method of utilizing wind-quenched steel slag to produce ceramsite for thermal insulation bricklaying, the specific process of the method is as follows:

[0029] 1) Weigh raw materials by mass: 60 parts of wind-quenched steel slag tailings, 12 parts of sodium bentonite, 25 parts of blast furnace slag powder, 2 parts of papermaking waste liquid residue, and 1 part of alumina powder; wherein, the wind-quenched steel slag tailings are The tailings of air-quenched steel slag after magnetic separation have a metal iron content of less than 1% and an average particle size of 3.5mm.

[0030] 2) Mix and grind the raw materials into a 150-mesh powder in a grinder, stir in a blender for 15 minutes, weigh 10 parts of water after uniformity, add in, and mix and stir in a blender for 20 minutes at a stirring speed of 250r / min. mixture;

[0031] 3) Then pelletizing on the high-pressure double roller briquetting machine to obtain spherical granular raw meal, the particle diameter is...

Embodiment 2

[0037] A method of utilizing wind-quenched steel slag to produce ceramsite for thermal insulation bricklaying, the specific process of the method is as follows:

[0038] 1) Weigh raw materials by mass: 65 parts of wind-quenched steel slag tailings, 15 parts of sodium bentonite, 16 parts of cement, 2 parts of papermaking waste liquid residue, and 2 parts of alumina powder; The tailings of steel slag after magnetic separation have a metal iron content of less than 1% and an average particle size of 4.0mm.

[0039] 2) Mix and grind the raw materials into a 150-mesh powder in a grinder, then stir in a blender for 18 minutes, weigh 9 parts of water and add it, and then mix and stir in a blender for 22 minutes at a stirring speed of 200r / min, and mix to obtain a mixture;

[0040] 3) Then pelletizing on the high-pressure double roller briquetting machine to obtain spherical granular raw meal, the particle diameter is 10mm;

[0041] 4) Put the obtained spherical raw meal into the dry...

Embodiment 3

[0046] A method of utilizing wind-quenched steel slag to produce ceramsite for thermal insulation bricklaying, the specific process of the method is as follows:

[0047]1) Weigh raw materials by mass: 70 parts of wind-quenched steel slag tailings, 14 parts of sodium bentonite, 12 parts of binder, 2 parts of plant cellulose, and 2 parts of alumina powder; The tailings of quenched steel slag after magnetic separation have a metallic iron content of less than 1% and an average particle size of 1.50-4.75mm; the binder is a mixture of 50wt% blast furnace slag powder and 50wt% Portland cement;

[0048] 2) Mix and grind in a grinder to form a 150-mesh powder, then stir in a blender for 15 minutes, weigh 10 parts of water and add it, and then mix and stir in a blender for 18 minutes at a stirring speed of 200r / min, and mix to obtain a mixture;

[0049] 3) Then pelletize on the high-pressure double roller briquetting machine to obtain spherical granular raw meal, the particle diameter ...

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Abstract

The invention discloses a method of producing haydite for a thermal insulation block by utilizing steel slag quenched with wind. The method comprises the following steps: 1) weighing raw materials according to mass weight; 2) grinding the raw materials in a grinder into powder in a mixing mode, stirring in a stirrer, adding water, and continuously stirring in the stirrer; 3) then pelletizing on a high-pressure twinroller machine to obtain a spherical granular raw meal; 4) enabling the obtained spherical raw meal to enter a drying system, raising the temperature of a pellet, and then drying; 5) underfiring by a rotary kiln; and 6) finally, roasting at a high temperature, and cooling to obtain steel slag haydite. According to the method disclosed by the invention, the produced hollow block has the performances of thermal insulation, seismic resistance, freezing resistance, fire resistance and the like and is also capable of solving the problem that the steel slag piles up to pollute the environment at present and increasing the added value of steel slag utilization. Meanwhile, the method is simple in process and low in cost, is environmentally friendly and saves the energy.

Description

technical field [0001] The invention belongs to the technical field of metallurgical slag treatment and resource utilization, and specifically refers to a method for producing ceramsite for thermal insulation blocks by using wind-quenched steel slag. Background technique [0002] In recent years, ceramsite, as a new type of building material industry, has developed rapidly. This is mainly manifested in: ①The raw materials used have broken through gravel (artificial sand or river sand), and gradually developed industrial waste such as fly ash, cinder ash, construction waste, blast furnace slag, and metallurgical tailings; ②The preparation method has also appeared There are many types of sintering type, high temperature thermal expansion type and non-burning type; ③The application fields range from the initial block and light aggregate concrete to sewage treatment filter material, soilless cultivation, greening, permeable concrete and many other fields. Ceramsite has many exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/138
CPCY02P40/60
Inventor 李灿华华洲连刘思李晖焦立新李亚光
Owner 宝武环科武汉金属资源有限责任公司
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