Method for recycling sand mold casting waste sand

A technology for casting waste sand and sand molds, which is applied in foundry molding equipment, machinery for cleaning/processing of casting materials, and manufacturing tools, etc. Cost increase and other issues, to achieve the effect of saving warehouse construction and occupancy costs, reducing waste sand discharge and stacking costs, and reducing production costs

CN110586855AInactive Publication Date: 2019-12-20山西永益铸管股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-12-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of sand mold casting and in particular to a method for recycling sand mold casting waste sand. The method comprises the specific steps that caked waste sand on a sieve is broken into fine sand; then, the fine sand and an acid solution are mixed sufficiently through spraying; the fine sand mixed sufficiently is ground through a grinding machine; separation is carried out through a centrifugal machine, solids obtained through centrifugal processing are dried until the moisture content is equal to or lower than 0.5-1%; and the dried fine sand is subjected to air screening and magnetic screening to remove impurities in the fine sand, and a finished product is obtained. By means of the method, emission of waste water and waste gas in the production process is reduced, waste sand is recycled, and economic benefits are improved.
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Description

technical field

[0001] The invention relates to the technical field of sand mold casting, in particular to a method for recycling waste sand of sand mold casting. Background technique

[0002] Sand casting is a widely used casting form. Sand casting needs to put the finished part model or wooden model in the sand, and then fill the sand around the pattern. After the pattern is taken out of the box, the sand forms a mold. In order to take out the model before casting metal, the mold should be made in two or more. multiple sections. During the casting process, it is necessary to leave holes and vent holes for casting metal into the mold to form a pouring system. After casting the liquid metal, the mold is kept for a suitable period of time until the metal solidifies. After the part is taken out, the mold is destroyed, so a new mold must be made for each casting. In this way, a lot of sand materials will be wasted in the whole casting process. For the lack of resources in to...

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Embodiment Construction

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail in combination with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. The technical solutions of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0029] Such as figure 1 As shown, it is a recovery and treatment device for sand casting waste sand. The device is used to recover sand casting waste sand. The specific implementation steps are:

[0030] a) Use chip crusher 1 to crush the agglomerated waste sand on the sieve into fine sand that can pass through 2*2mm sieve holes.

[0031] b) The fine sand is sent into the sp...