Sodium silicate-bonded sand regeneration system
A technology of water glass sand and regeneration system, which is applied in casting molding equipment, machinery for cleaning/processing of casting materials, metal processing equipment, etc., can solve the problems of low recovery rate of water glass dry regeneration and other problems
Inactive Publication Date: 2019-01-18
XINGHUA DONGCHANG ALLOY STEEL
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[0003] The present invention aims at the deficiencies of the above-mentioned prior art, and proposes a novel water glass sand regeneration and recovery system, which can solve the problem of low recovery rate of the existing water glass dry regeneration
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[0012] The present invention will be further described below in conjunction with accompanying drawing.
[0013] First, the old sand is crushed by crushing equipment, and then dried at 20-40 mesh, which can reduce the accumulation of old sand, and then washed at 90°C to remove the binder, and then dried at 300-350°C at high temperature. The dried sodium silicate sand is regenerated by dry method, and the regenerated sand is dried and dedusted for the second time, and finally enters the regenerated sand box.
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The invention discloses a sodium silicate-bonded sand regeneration system, and belongs to the field of casting of sodium silicate. The sodium silicate-bonded sand regeneration system mainly solves theproblems of complex structure, high pollution, low efficiency and the like of an existing sodium silicate-bonded sand regeneration system. A technical method of the sodium silicate-bonded sand regeneration system is that high temperature water washing equipment and high temperature drying equipment are added into a traditional regeneration system and then connected with dry regeneration equipmentin the system. Secondary drying is conducted after dry regeneration. A binder film on the surfaces of sand grains can be removed to a large extent through high temperature water washing, stirring andscrubbing. Meanwhile, dry regeneration can be conducted after high temperature drying, and thus sodium oxide, dust and a residual sintering matter in used sand can be removed. The system not only canproduce the high quality regenerated sand, but also can clean the dust and sodium silicate.
Description
technical field [0001] The invention relates to the field of water glass sand casting, in particular to a novel water glass sand regeneration system, which belongs to the field of water glass sand casting. Background technique [0002] Nowadays, water glass is colorless, odorless and non-toxic. At the same time, there is no irritating smell and toxic gas in the process of sand mixing, molding, pouring and sand falling. At the same time, the casting performance is also good, so it is widely used in the recasting industry. welcome. However, water glass sand also has deficiencies, because water glass sand is difficult to recycle, so there is a large solid pollution to the environment. Today's water glass regeneration methods mainly include dry regeneration, wet regeneration, and chemical regeneration. The efficiency of dry regeneration is better, but the recovery rate of water glass sand using dry regeneration is average, mainly because it cannot Effectively remove the binder...
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IPC IPC(8): B22C5/00B22C5/06B22C5/08B22C5/10
CPCB22C5/00B22C5/06B22C5/08B22C5/10
Inventor 陆长胜李冬取蒋伟
Owner XINGHUA DONGCHANG ALLOY STEEL
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