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A kind of water glass old sand regeneration method

A technology for recycling old sand and water glass, which is applied in casting molding equipment, metal processing equipment, manufacturing tools, etc. It can solve the problems of insufficient cleaning force of the adhesive film, failure to achieve regeneration effect, and unsatisfactory regeneration effect. Low cost, good effect, and the effect of increasing efficiency

Active Publication Date: 2021-05-04
北京仁创砂业铸造材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the dry regeneration process, due to frictional heat, the frozen layer on the surface of the old sand begins to melt, and the regeneration effect of the dry method after freezing is not ideal.
CN107159837A discloses a drum wet regeneration and dehydration integrated equipment and its use method. The equipment and its use method use centrifugal force to rotate old sand and water, and there is no equipment for the residual binder vitrified on the old sand surface under high temperature. Therefore, the cleaning power of the adhesive film remaining on the sand surface is insufficient, and a good regeneration effect cannot be achieved.
However, this method needs to heat water at 100°C to obtain steam, so it consumes a lot of energy, and the residual binder is difficult to dissolve and remove in the steam state

Method used

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  • A kind of water glass old sand regeneration method
  • A kind of water glass old sand regeneration method
  • A kind of water glass old sand regeneration method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The water glass old sand regeneration method of the present embodiment may further comprise the steps:

[0033] (1) The old sand of water glass is pulverized, and the old sand of water glass after pulverization is passed through a 20-mesh sieve. The particle diameter of the old water glass sand is less than 0.6mm. Add ferrous sulfate aqueous solution, and the concentration of ferrous sulfate aqueous solution is 5g / L , the volume ratio of the old water glass sand to the ferrous sulfate aqueous solution is 1:0.8, stir evenly in the centrifugal stirring drum, the bottom of the centrifugal stirring drum is provided with an ultrasonic emission rod, a centrifugal stirring motor and an electric heating device, and the The ultrasonic emitting rod, the centrifugal stirring motor and the electric heating device are all turned on, the frequency of the ultrasonic emitting rod is 35kHz, and the distribution frequency is 300cm 2 / piece, the rotational speed of the centrifugal stirri...

Embodiment 2

[0036] The water glass old sand regeneration method of the present embodiment may further comprise the steps:

[0037] (1) the old sand of water glass is pulverized, and the old sand of water glass after pulverizing is crossed 30 mesh sieves, and the particle diameter of the old sand of water glass is less than 0.6mm, adds ferrous sulfate aqueous solution, and the concentration of ferrous sulfate aqueous solution is 12.5g / L, the volume ratio of sodium silicate old sand and ferrous sulfate aqueous solution is 1:1, stirs evenly in the centrifugal stirring drum, and the bottom of described centrifugal stirring drum is provided with ultrasonic emission rod, centrifugal stirring motor and electric heating device, Turn on the ultrasonic emitting rod, centrifugal stirring motor and electric heating device, the frequency of the ultrasonic emitting rod is 40kHz, and the distribution frequency is 315cm 2 / piece, the rotational speed of the centrifugal stirring motor is 230r / min, the t...

Embodiment 3

[0040] The water glass old sand regeneration method of the present embodiment may further comprise the steps:

[0041](1) The old sand of water glass is pulverized, and the old sand of water glass after pulverization is passed through a 40-mesh sieve, and the particle diameter of the old water glass sand is less than 0.6mm. Add ferrous sulfate aqueous solution, and the concentration of ferrous sulfate aqueous solution is 20g / L The volume ratio of the old water glass sand to the ferrous sulfate aqueous solution is 1:1.2, and it is evenly stirred in the centrifugal stirring drum, and the bottom of the centrifugal stirring drum is provided with an ultrasonic emitting rod, a centrifugal stirring motor and an electric heating device, and the The ultrasonic emitting rod, the centrifugal stirring motor and the electric heating device are all turned on, the frequency of the ultrasonic emitting rod is 45kHz, and the distribution frequency is 330cm 2 / piece, the rotational speed of the...

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Abstract

The present invention relates to a method for regenerating used water glass sand, comprising the following steps: (1) crushing used water glass sand and adding it together with an aqueous solution of ferrous sulfate into a centrifugal stirring drum, the bottom of the centrifugal stirring drum is provided with ultrasonic waves Launch rod, centrifugal stirring motor and electric heating device, and the old water glass sand is regenerated by mechanical-ultrasonic wet method in the centrifugal stirring drum; (2) The regenerated sand-water mixture is dehydrated to obtain wet regenerated sand and waste water. The wet regenerated sand is dried and screened to obtain the water glass regenerated sand. The method for regenerating old water glass sand of the present invention adopts the combined action of ultrasonic, centrifugal stirring and electric heating device, which increases the efficiency of regeneration. Regeneration of old sand with high water glass.

Description

technical field [0001] The invention belongs to the technical field of regeneration and recovery of foundry sand, and in particular relates to a method for regeneration of used water glass sand. Background technique [0002] The foundry industry is still one of the basic processes of the modern machinery manufacturing industry, and occupies a very important position in the manufacture of various mechanical equipment such as steel, electric power, automobiles, and aerospace. my country's casting output ranks first in the world all year round, and it is a veritable foundry country. However, my country's foundry industry has always been an extensive development model, and high energy consumption, material consumption and waste discharge have not been effectively dealt with. [0003] Sodium silicate inorganic binder is the most successful inorganic binder in production and application at present, and its advantages are very obvious, that is, it will not emit toxic and harmful g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C5/00B22C5/02B22C5/06B22C5/08
CPCB22C5/00B22C5/02B22C5/06B22C5/08
Inventor 刘栋尹海军冯俊龙李卓情包羽冲
Owner 北京仁创砂业铸造材料有限公司
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