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Water glass inorganic used sand regeneration method

A technology of used sand regeneration and water glass, which is applied in the cleaning/processing machinery of casting materials, casting molding equipment, casting molds, etc., can solve the problems of shortening the life of regeneration equipment, poor quality of recycled sand and low regeneration efficiency, Achieve the effect of acid-base stability, high regeneration rate and low energy consumption

Active Publication Date: 2019-11-12
南阳仁创砂业科技有限公司
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Problems solved by technology

Among them, the quality of regenerated sand obtained by dry method is poor, and the reuse rate is low; the quality of reclaimed sand obtained by wet method is good, but there are problems such as high cost investment and secondary pollution caused by waste water; thermal regeneration also requires energy consumption, and the regeneration effect It is only slightly better than the dry method; chemical regeneration will seriously shorten the life of the regeneration equipment, and the regeneration efficiency is low

Method used

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  • Water glass inorganic used sand regeneration method

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Effect test

Embodiment 1

[0037] A kind of water glass inorganic old sand regeneration method, comprises the following steps:

[0038] (1) Add 1 part by weight of additives to 100 parts by weight of water glass inorganic old sand and stir and mix. The additives contain aluminum chloride, ammonium chloride and silicon dioxide, and the mass ratio of the three is 2:2:1 .

[0039] During the stirring process, 0.5 parts by weight of water was added by spraying, and stirred for 5 minutes to obtain a mixture.

[0040] (2) After the stirring is completed, the mixture is placed in a centrifuge at a centrifugal speed of 500-3000 r / min, and centrifuged continuously for 1 min to obtain regenerated sand.

[0041] (3) The recycled sand after centrifugation is sieved through a 140-mesh screen and recorded as finished sand.

[0042] The reaction conditions in Examples 2-9 were changed, and the specific settings are shown in Table 1. The properties of the reclaimed sand obtained are shown in Table 2.

[0043] Table...

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Abstract

The invention provides a water glass inorganic used sand regeneration method. The water glass inorganic used sand regeneration method includes the steps that an adding agent is added into water glassinorganic used sand and stirred and mixed, and then centrifugal treatment is performed so that regenerative sand can be obtained. A chemical reagent added in the method is stable in acidity and alkalinity, serious corroding on equipment is not caused, and material taking is convenient; a centrifugal manner is selected in a mechanical method, and the mechanical efficiency can be adjusted due to speed changing; and meanwhile, a centrifugal method can also be used for separating sand grains from a removed inorganic film due to speed changing. The regeneration process related in the method is simple, equipment input is low, energy consumption is little, and no secondary pollution is generated; and the regeneration rate is high, and reaction resultants cannot affect the using process of the regenerative sand.

Description

technical field [0001] The invention relates to the technical field of resource recovery, in particular to a method for regenerating inorganic old sand of water glass. Background technique [0002] The main components of water glass inorganic binder sand are modified sodium silicate and additives containing metal oxides. It is mainly used as foundry sand, which has cohesiveness after being mixed with silica sand, and can be solidified and formed after heating. Sodium silicate inorganic binder sand is one of the three most widely used sand molds in casting, and it is developing rapidly because of its advantages of high precision, low energy consumption, and no pollution. However, it has the disadvantage of poor regeneration and reuse of old sand, which has become the biggest obstacle to development. According to decades of research results in the industry, there are mainly four methods of regeneration of sodium silicate inorganic sand: dry method, wet method, thermal method...

Claims

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Application Information

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IPC IPC(8): B22C1/18B22C5/02B22C5/04
CPCB22C1/188B22C5/02B22C5/04
Inventor 冯俊龙尹海军李卓情包羽冲刘承翔
Owner 南阳仁创砂业科技有限公司
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