Chemical regeneration method in casting waste sand disposing process

A technology of chemical regeneration and casting waste sand, which is applied in the cleaning/processing machinery of casting mold materials, casting molding equipment, manufacturing tools, etc. It can solve the problems that impurities cannot be completely removed, and achieve improved chemical resistance to sand sticking and good economy. Good performance and good overall effect of waste sand regeneration
CN102000764AInactive Publication Date: 2011-04-06CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
Publication Date
2011-04-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a chemical regeneration method in the casting waste sand disposing process, relating to a process for performing surface chemical processing on various impurities which are attached on the surface of waste sand and are better not be reused in casting-form sand materials. During the chemical regeneration, chemical surface conditioning liquid I or / and chemical surface conditioning liquid II is or are used, and the disposing sand temperature is not more than 400 DEG C. The chemical regeneration method in the invention is carried out before or after the hot-method regeneration disposing or mechanical regeneration disposing of the casting waste sand disposing processing, and the chemical disposing technique is combined with the traditional hot-method regeneration and mechanical friction regeneration. The regeneration new sand formed in the method has better quality of the new sand, can better meet the application requirement on multi-form sand producing technique (hot core box, warm core box and cold core box) for recycling different casting waste sands (hot core box resin casting waste sand, warm core box resin casting waste sand, gas or / and organic fat hardening cold core box resin casting waste sand and profile damp die casting sand), and has better economical efficiency.
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Description

technical field

[0001] The invention belongs to the technical field of mold casting sand core materials. Background technique

[0002] The main component of quartz sand used in casting materials is SiO 2 , accounting for more than 92% of the sand weight, and the rest is about 5% Al 2 o 3 , about 0.5% Fe 2 o 3 , about 0.2% of CaO, about 0.1% of metal oxides such as MgO, and about 2% of moisture and mud (feldspar clay, etc.). The oxides in this are usually the same as SiO in quartz sand 2 Intergrowth, some are in the crystallization, and some are attached to SiO in the form of feldspar structure 2 the surface of the crystal. Quartz sand and various polymer resin organic binders are used to make resin-coated sand with different characteristics, because SiO 2 The crystalline structure is stable and has high temperature resistance, which is suitable for most casting applications. Foundry sand cores made of this material are used for metal smelting and pouring into metal...

Claims

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