Foundry used sand wet intermittent regeneration method and equipment thereof

Abstract

A foundry used sand wet intermittent regeneration method and equipment thereof belong to a foundry used sand regeneration method and equipment thereof, aim to solve the problem of complicated process and narrow application scope of the conventional foundry used sand wet regeneration method, and further solve the problem of relatively complicated structure of the conventional regeneration equipment. The regeneration method comprises a scrubbing step, a second scrubbing step, a third scrubbing step and a checking step. The regeneration equipment comprises a stirrer and a sand-water separation device, wherein the stirrer comprises a support frame, a scrubbing cylinder, a drive cylinder, a motor and a main shaft, and the scrubbing cylinder is provided with a sand inlet and a water inlet and further provided with a water drainage valve and a sand discharge valve. By integrating the combined actions of mechanical stirring, water washing and acid cleaning, the regeneration method provided by the invention has the advantages of convenience in control, low water consumption, high residual adhesive removal ratio and good sand regeneration quality; the regeneration equipment has the advantages of simple structure, low energy consumption, convenience in control and good sand regeneration quality; and the regeneration method and equipment are suitable for large-scale wet regeneration of used clay sand, used water glass sand and used alkaline phenolic resin sand.

Description

technical field

[0001] The invention belongs to a method and equipment for regenerating old foundry sand, in particular to a wet-process intermittent regenerated method for used foundry sand and its device. Background technique

[0002] Foundry old sand regeneration refers to breaking the used old sand and removing the residual binder film and sundries wrapped on the waste sand, so as to restore the physical and chemical properties close to the new sand, so as to replace the new sand.

[0003] At present, there are three main methods of recycling used foundry sand:

[0004] The first method is dry regeneration. There are various forms of dry regeneration of old sand, including mechanical, airflow, vibration, etc., but in terms of regeneration mechanism, they are all "collision and friction" processes. When the force generated in the collision friction is greater than the yield strength of the residual adhesive film on the old sand grains or the bonding strength between the...

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