A resource utilization method for sludge produced by wet regeneration of clay old sand

A technology of wet regeneration and recycling, which is applied in casting molding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of waste of natural resources, natural environment pollution, etc., reduce emissions, meet process requirements, and improve casting process performance Effect

Active Publication Date: 2019-11-05
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that directly throwing away the sludge produced in the clay old sand wet regeneration process not only causes pollution to the natural environment, but also causes a waste of natural resources. The method of regenerating the generated sludge to prepare the mixed soil used for mixing clay sand, which is used to replace the bentonite and coal powder added in the clay sand mixing process, so as to realize the resource utilization of sludge generated in the wet regeneration process of clay sand Reuse to realize the recycling of natural resources, protect the natural environment and natural resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An embodiment of the present invention provides a resource utilization method for sludge produced by wet regeneration of old clay sand, comprising the following steps:

[0021] Step (1) Dehydrate and dry the sludge generated by wet regeneration, and then perform ball milling, so that more than 95% of its mass passes through a 200-mesh casting test sieve to prepare a base material for mixing clay sand;

[0022] Step (2) Add polyethylene oxide, additives, thymol and soybean meal powder to the base material obtained in step (1), mix and stir evenly to obtain a compound that can be used to replace bentonite and coal powder when mixing clay sand mixed soil.

[0023] Wherein, in step (2), the addition amount of polyethylene oxide is 3% of base material quality, and the addition amount of additive is 16% of base material quality, and the addition amount of thymol is 25g per ton of base material, and additive It is alpha starch, and the addition amount of soybean meal powder i...

Embodiment 2

[0026] An embodiment of the present invention provides a resource utilization method for sludge produced by wet regeneration of old clay sand, comprising the following steps:

[0027] Step (1) Dehydrate and dry the sludge generated by wet regeneration, and then perform ball milling, so that more than 95% of its mass passes through a 200-mesh casting test sieve to prepare a base material for mixing clay sand;

[0028] Step (2) Add polyethylene oxide, additives, thymol and soybean meal powder to the base material obtained in step (1), mix and stir evenly to obtain a compound that can be used to replace bentonite and coal powder when mixing clay sand mixed soil.

[0029] Wherein, in step (2), the addition amount of polyethylene oxide is 5% of base material quality, and the addition amount of additive is 8% of base material quality, and the addition amount of thymol is 5g per ton of base material, and additive It is a mixture of α-starch and dextrin, the mass fraction of dextrin ...

Embodiment 3

[0032] An embodiment of the present invention provides a resource utilization method for sludge produced by wet regeneration of old clay sand, comprising the following steps:

[0033] Step (1) Dehydrate and dry the sludge generated by wet regeneration, and then perform ball milling, so that more than 95% of its mass passes through a 200-mesh casting test sieve to prepare a base material for mixing clay sand;

[0034] Step (2) Add polyethylene oxide, additives, thymol and soybean meal powder to the base material obtained in step (1), mix and stir evenly to obtain a compound that can be used to replace bentonite and coal powder when mixing clay molding sand mixed soil.

[0035] Wherein, in step (2), the addition amount of polyethylene oxide is 4.2% of base material quality, the addition amount of additive is 12% of base material quality, the addition amount of thymol is 15g per ton of base material, additive It is a mixture of α-starch and dextrin, the mass fraction of dextrin ...

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Abstract

The invention discloses a resourceful utilization method of clay old sand wet-process regenerated sludge. The method comprises the following steps: firstly, wet-process regenerated sludge is dehydrated for drying and ball milling to pass through a 200-mesh testing screen for casting to prepare a stock; and then, polyethylene oxide, an additive, thymol crystals and bean pulp powder are added in thestock for uniform mixing to obtain mixed soil, wherein the additive is one of starch and dextrin or a mixture of the two materials. The method has the following beneficial effects: the method realizes resourceful reutilization of the clay old sand wet-process regenerated sludge, reduces the emission of solid wastes, and protects natural environments and natural resources; compared with a traditional process for mixed preparation of clay sand by adding bentonite and pulverized coals, the method for mixed preparation of the clay sand by the prepared mixed soil improves the casting process performances, and can meet the process requirements of casting production; and the resourceful utilization method is simple in process and easy to realize industrial production.

Description

technical field [0001] The invention relates to the technical field of casting under the subject of mechanical manufacturing and automation, in particular to a resource utilization method for sludge produced by wet regeneration of clay old sand. Background technique [0002] Sand casting is the main method of casting production, and the castings produced by sand casting process account for more than 90% of the total output of castings. Among many sand casting processes, clay sand casting is the most commonly used sand casting process. The castings produced by the clay sand process account for more than 50% of the total castings produced by the sand casting process. The clay sand casting process has been widely used. . [0003] In the production process of clay sand casting, about 1 ton of waste sand is produced for every ton of casting produced, so a large amount of clay waste sand will be produced every year. The discharge of clay waste sand not only causes pollution to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 孙清洲许荣福任文成
Owner SHANDONG JIANZHU UNIV
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