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Reutilization method for waste sand

A technology for waste sand and sand particles, which is applied in the field of waste sand reuse, can solve problems such as environmental pollution and resource waste.

Inactive Publication Date: 2011-10-19
南江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the waste sand in the prior art is directly discarded, which not only pollutes the environment, but also causes a waste of resources. It is undoubtedly not advisable for a modern society that advocates environmental protection and conservation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for recycling waste sand, comprising the following steps:

[0014] (1) Crushing: crush the massive waste sand to particles with a particle size of 5-15mm;

[0015] (2) Magnetic separation: the waste sand after crushing in step (1) is utilized strong magnetic roller to separate oxidized sand and steel slag through conveyer belt, makes iron content mass fraction in the waste sand be lower than 0.1%;

[0016] (3) Extrusion and crushing: the waste sand treated in step (2) is extruded into 2-8 mm sand grains by counter-rollers, and the powder on the surface of the sand grains is removed;

[0017] (4) Screening: the processed sand in step (3) is screened through a linear vibrating sieve for 3-stage screening, and the rolled sand is screened through a linear vibrating sieve for 3-stage screening for particles larger than 4mm for secondary processing. 1.5~4mm for secondary screening finished products are 1.5~2.5 and 2.5~4mm respectively. The size below 1.5mm is crush...

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PUM

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Abstract

The invention discloses a reutilization method for waste sand. The method comprises the following steps: (1) crushing, wherein block waste sand is crushed into particles having a particle diameter of 5-15 mm; (2) magnetic separation, wherein the crushed waste sand from the step (1) is conveyed on a conveyer, and oxidative sand and steel slag are separated through a high intensity magnetic roller, such that a mass fraction of a iron content in the waste sand is lower than 0.1%; (3) attrition crushing, wherein the processed waste sand from the step (2) is conveyed to a roll extruder to obtain the sand having a particle diameter of 2-8 mm, and powder materials on surfaces of the sand are removed; (4) screening, wherein the processed waste sand from the step (3) is conveyed to a linear vibrating screen to carry out a three-level screen, the sand having the particle diameter smaller than 1.5 mm is crushed through a mill, followed by purifying through a blower. After processing through the method provided by the present invention, the resulting high aluminum powder (Al2O3) content is raised to 32-35%, and a refractory temperature of the high aluminum powder (Al2O3) is 1680-1720 DEG C, such that indexes of the high aluminum powder (Al2O3) completely accord with specifications of the high aluminum powder (Al2O3) in industry.

Description

technical field [0001] The invention relates to waste recycling technology, in particular to a method for recycling waste sand. Background technique [0002] Most of the waste sand in the prior art is directly discarded, which not only pollutes the environment, but also causes a waste of resources. It is undoubtedly undesirable for a modern society that advocates environmental protection and conservation. Contents of the invention [0003] The present invention aims to overcome the shortcomings of the prior art above, and provides a method for reusing waste sand in order to realize the reuse of waste sand. [0004] The present invention solves technical problem and adopts following technical scheme: [0005] A method for recycling waste sand, comprising the following steps: [0006] (1) Crushing: crush the massive waste sand to particles with a particle size of 5-15mm; [0007] (2) Magnetic separation: the waste sand after crushing in step (1) is utilized strong magneti...

Claims

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Application Information

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IPC IPC(8): C01F7/02B09B3/00
Inventor 南江
Owner 南江