Preparation method of artificial sand

A technology of artificial sand and sand particles, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., to achieve the effects of reducing production costs, small bulk density, and superior compression resistance

Inactive Publication Date: 2011-08-31
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of red color in the reuse of ferroalloy waste slag, the ferroalloy slag is prepared into machine-made artificial sand through a certain treatment process instead of natural sand as the aggregate of ordinary mortar Production of ordinary mortar

Method used

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  • Preparation method of artificial sand

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Embodiment 1

[0029] The ferrosilicon alloy slag is made into artificial sand particles with a particle size of 0.1~5mm by a sand making machine, and piled up into a sand pile. Prepare alkaline modified solution, Ca(OH) in the modified solution 2 The weight ratio to NaOH is 15:2, and the concentration of the modifying solution is 0.05wt%. Spray 30 tons of modified liquid evenly on the pile of 30 tons of artificial sand, spray in 5 times, and recycle the excess modified liquid flowing out of the sand pile into the modified liquid pool.

[0030] Then the modified machine-made artificial sand is spread out in the drying yard until it is dried, and after being classified into coarse, medium and fine sand, they enter different silos respectively to make the ferroalloy slag machine-made artificial sand.

[0031] Use the above-mentioned ferroalloy slag mechanism artificial sand to make dry-mixed plastering mortar. The weight ratio of the mortar is: cement: medium sand: fine sand: fly ash: slag po...

Embodiment 2

[0033] The stainless steel slag is made into artificial sand particles with a particle size of 0.1~5mm by a sand making machine, and piled up into a sand pile. Prepare alkaline modified solution, Ca(OH) in the modified solution 2 The weight ratio to NaOH is 1:1, and the concentration of the modifying solution is 0.2wt%. Spray 10 tons of modified liquid evenly on 10 tons of artificial sand piles, spray in 3 times, and recycle the excess modified liquid flowing out of the sand pile into the modified liquid pool.

[0034] Then the machine-made artificial sand after leaching is dried on the dryer, and after being classified into coarse, medium and fine sand, they enter different silos respectively to make artificial sand made of ferroalloy slag.

[0035] Utilize the above-mentioned ferroalloy slag mechanism artificial sand to make ordinary masonry mortar, the weight ratio of mortar is: cement: coarse sand: medium sand: fine sand: fly ash: slag powder = 12:30:18:30: 5:5, the ceme...

Embodiment 3

[0037] The stainless steel slag is made into artificial sand particles with a particle size of 0.1~5mm by a sand making machine, and piled up into a sand pile. Prepare alkaline modification liquid, the concentration of alkali in the modification liquid is 0.15wt%, wherein Ca(OH) 2 The weight ratio of NaOH and NaOH is 2:1, and the modification solution also includes 0.02wt% sodium silicate. Spray 20 tons of modified liquid evenly on the pile of 20 tons of artificial sand grains, spray in 4 times, and recycle the excess modified liquid flowing out of the sand pile into the modified liquid pool.

[0038] Then the machine-made artificial sand after leaching is dried on the dryer, and after being classified into coarse, medium and fine sand, they enter different silos respectively to make artificial sand made of ferroalloy slag.

[0039] Utilize the above-mentioned ferroalloy slag mechanism artificial sand to make ordinary masonry mortar, the weight ratio of mortar is: cement: coa...

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Abstract

The invention relates to a method for preparing artificial sand from iron alloy slag, belonging to the field of reutilization of iron alloy slag. The method comprises the following steps: preparing iron alloy slag into sand grains of which the grain size is 0.1-5mm, modifying with an alkaline modification liquid, and drying to obtain the artificial sand, wherein the concentration of the alkaline modification liquid is 0.05-0.2wt%, and the solute comprises Ca(OH)2 and NaOH of which the weight ratio is (5-15):(2-5) as well as 0.02wt% of sodium silicate. The artificial sand can be substituted for natural bluestone sand and quartz sand, lowers the production cost of mortar, improves the economic benefit, and has the properties of small volume weight and increasing later strength; the discharge amount of the used iron alloy slag material is large, the price is low, and the treatment process is simple, thereby ensuring low investment, quick gain return and remarkable benefit; and the invention implements the comprehensive utilization of industrial waste slag, solves the problems of farmland occupation and environment pollution, and achieves the national economy development goals of constructing resource-conserving and environment-friendly society and realizing sustainable development.

Description

technical field [0001] The invention relates to the field of recycling ferroalloy slag, in particular to a method for preparing artificial sand by using ferroalloy slag. Background technique [0002] Ferroalloy slag is an industrial waste produced during the smelting of ferroalloys. According to the different types of ferroalloy produced, ferroalloy slag can be divided into ferromanganese alloy slag, ferrosilicon alloy slag, ferrochrome alloy slag, stainless steel slag and so on. Ferroalloy slag is naturally cooled in the air or cooled by a small amount of water to form a stone material with large bulk density and blockiness, which is gray or gray black, similar to natural basaltic or granite lava, with a certain number of pores inside Different pores, high hardness and high strength. This large block of rocky waste slag has been slowly cooled during the discharge process, and has a relatively balanced crystal structure. The main minerals are calcium-aluminum feldspar, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/14
CPCY02W30/91
Inventor 陶文宏付兴华陈广立宋义勇
Owner UNIV OF JINAN
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