Production method for building block taking steel slag as raw material

A production method and technology for steel slag, which are applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of inability to be widely used, high content of active calcium oxide, serious environmental pollution, etc., and achieve good economic benefits. , The effect of simple ingredients and simple process operation

Inactive Publication Date: 2015-12-09
SHANDONG XINNUO NEW ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high and unstable content of active calcium oxide in steel slag, it cannot be popularized and used normally. Traditional steel slag treatment methods generally have disadvantages such as large floor area, serious environmental pollution during the treatment process, and large equipment consumption.
[0003] Therefore, solving the instability of free calcium oxide in steel slag is the key link for the large-scale promotion and application of steel slag. At present, in order to improve the utilization rate of steel slag, other ingredients are added to realize complex chemical reactions between the components in the ingredients and calcium ions in steel slag, thereby ensuring The stability of steel slag, this method has a better effect in theory, but in practical applications, due to the complexity of the ingredients in the ingredients and the instability of the ingredients in the ingredients, the implementation is more complicated and the effect is uncontrollable. high cost issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A block production method using steel slag as raw material is characterized in that it comprises the following steps:

[0029] 1) Steel slag is hot and stuffy, which is hot stuffy at 1000°C for 20 hours, during which the amount of water sprayed is 14kg per hour for one ton of steel slag;

[0030] 2) After the steel slag is crushed, go through magnetic separation, ball mill and water separation to select iron and remaining tailings, and the steel slag is crushed and ball milled until the particle size is below 200mm;

[0031] 3) The tailing sludge obtained in step 2) is piled up and stored at room temperature for 88 days, and placed to coagulate into a coagulated block;

[0032] 4) crushing the coagulated block in step 3), and screening to obtain aggregates with a particle size of 0.5mm-6mm;

[0033] 5) mixing the aggregate in step 4) with cement, additives, and other light raw materials by weight percentage: 70% of aggregate, 15% of cement, 4% of additive, and 11% of l...

Embodiment 2

[0051] A block production method using steel slag as raw material is characterized in that it comprises the following steps:

[0052] 1) The steel slag is hot and stuffy, which is hot stuffy at 900°C for 22 hours, and the amount of water sprayed during this period is 16.6kg per hour for one ton of steel slag;

[0053] 2) After the steel slag is crushed, go through magnetic separation, ball mill and water separation to select iron and remaining tailings, and the steel slag is crushed and ball milled until the particle size is below 200mm;

[0054] 3) The tailing sludge obtained in step 2) is piled up and stored at room temperature for 85 days, and placed to condense into a coagulated block;

[0055] 4) crushing the coagulated block in step 3), and screening to obtain aggregates with a particle size of 0.5mm-6mm;

[0056]5) mixing the aggregate in step 4) with cement, additives, and other light raw materials by weight percentage: aggregate 75%, cement 12%, additive 2%, light ra...

Embodiment 3

[0074] A block production method using steel slag as raw material is characterized in that it comprises the following steps:

[0075] 1) Steel slag is hot and stuffy, which is hot stuffy at 1100°C for 18 hours, during which the amount of water sprayed is 13.6kg per hour for one ton of steel slag;

[0076] 2) After the steel slag is crushed, go through magnetic separation, ball mill and water separation to select iron and remaining tailings, and the steel slag is crushed and ball milled until the particle size is below 200mm;

[0077] 3) The tailing sludge obtained in step 2) is piled up and stored at room temperature for 90 days, and placed to condense into a coagulated block;

[0078] 4) crushing the coagulated block in step 3), and screening to obtain aggregates with a particle size of 0.5mm-6mm;

[0079] 5) mixing the aggregate in step 4) with cement, additives, and other light raw materials by weight percentage: aggregate 68%, cement 14%, additive 6%, light raw material 1...

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Abstract

A related production method for a building block taking steel slag as a raw material is characterized by comprising the following steps: 1) performing hot disintegration on steel slag; 2) crushing steel slag, performing magnetic selection, ball milling and water selection, so as to select iron and obtain the residual tailing slurry; 3) piling the tailing slurry obtained in the step 2) for storage, disposing and coagulating so as to form a coagulum; 4) crushing the coagulum in the step 3), screening to obtain an aggregate with the particle size of 0.5-6 mm; 5) mixing the aggregate in the step 4) with cement, an additive and other lightweight raw material according to the following weight fractions: 65%-75% of the aggregate, 12%-18% of cement, 1%-6% of the additive, and 5%-13% of the lightweight raw material; 6) adding water into the mixed materials of the step 5) and stirring, so as to obtain a mixed slurry; 7) adding the mixed slurry of the step 6) into a die and performing vibrating compaction molding; 8) performing steam curing by high-pressure steam; and 9) stacking for storage. Compared with the prior art, the method possesses the characteristics of strong compressive resistance and high stability.

Description

technical field [0001] The invention relates to a production method of building blocks, in particular to a production method of building blocks using steel slag as raw material. Background technique [0002] Steel slag is the waste slag discharged from the steelmaking industry. In recent years, my country's steel industry has developed rapidly. According to incomplete statistics, China's steel slag output is about 15%-20% of crude steel, and its comprehensive utilization rate is only about 22%. Due to the high and unstable content of active calcium oxide in steel slag, it cannot be popularized and used normally. Traditional steel slag treatment methods generally have disadvantages such as large area occupation, serious environmental pollution during the treatment process, and high equipment consumption. [0003] Therefore, solving the instability of free calcium oxide in steel slag is the key link for the large-scale promotion and application of steel slag. At present, in or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B18/14
CPCY02W30/91
Inventor 于在民
Owner SHANDONG XINNUO NEW ENERGY SAVING MATERIALS CO LTD
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