Process and device for reusing waste foundry sand

Abstract

The invention relates to a device for reusing waste foundry sand, which comprises vibrating screens, a belt conveyer, a crusher and a hopper. The device is characterized in that a vibrating screen I is mounted under a discharging port of the hopper; the discharging port of the vibrating screen I corresponds to a feeding port of the crusher; a vibrating screen II is mounted under the discharging port of the crusher; the discharging port of the vibrating screen II corresponds to the belt conveyer; and the discharging port of the belt conveyer corresponds to the feeding port of a sand cleaning machine. The technical scheme of the invention is that screening, crushing, iron-removing and cleaning devices are organically combined and foundry sand and sodium silicate in the waste foundry sand are extracted, thereby solving the problems of the prior art, such as waste foundry sand influence, ecological environmental pollution, land resource occupation, and the like, while efficiently saving resources. The device for reusing waste foundry sand is characterized by reasonable structure, high recovery efficiency, low cost, and the like, and is suitable for the processing of waste foundry sand.

Description

technical field [0001] The invention relates to a casting waste sand recycling process and device. Background technique [0002] Sodium silicate solution, also known as sodium silicate or sodium silicate, is widely used in the foundry industry and is a good binder for clean molding and core-making foundry sand; in the machinery industry, the weight of castings accounts for about This will produce a large amount of foundry waste sand containing sodium silicate. Due to the poor collapsibility of foundry waste sand, it is mainly used after sieving and mixing the sieved sand with new sand. Larger particles The foundry waste sand is discarded, on the one hand, due to the Na contained in the waste sand 2 O particles, 60% soluble in water, diffuse into the water body with rainwater, making the soil alkaline and affecting the ecological environment. On the other hand, it causes the occupation of land resources and causes environmental pollution. Contents of the invention [0003...

AI Technical Summary

Problems solved by technology

[0002] Sodium silicate solution, also known as sodium silicate or sodium silicate, is widely used in the foundry industry and is a good binder for clean molding and core-making foundry sand; in the machinery industry, the weight of castings accounts for about This will produce a large amount of foundry waste sand containing sodium silicate. Due to the poor collapsibility of foundry waste sand, it is mainly used after sieving and mixing the sieved sand with new sand. Larger particles The foundry waste sand is discarded, on the one hand, due to the Na contained in the waste sand 2 O particles, 60% soluble in water, diffuse into the water body with rainwater, making the soil more alkaline and affecting the ecological environment. On the other hand, it will occupy land resources and cause environmental pollution.

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