Recycling regenerating method of water glass used sand

Abstract

The invention discloses a recycling regenerating method of water glass used sand. The method includes: breaking virbately water glass used sand, removing impurity, and the broken sand is 20-40 meshes; and washing in high temperature, heating water to over 90 DEG C, pouring the broken water glass used sand into the water, mixing, scrubbing, and removing a binder membrane on the surface of sand; and drying the washed water glass particles at a high temperature of 300-350 DEG C, carrying out dry reclamation, removing the sodium oxide, dust and residual sinter in used sand. Improving the water temperature of washing sand, increasing the solubility of water glass in water, decreasing water consumption of washing sand, and improving recycle rate of reclamation sand; and hot wet method unites with dry method to regenerate, so that the respective advantages of both are banded together, accordingly the production of reclamation sand of high quality is achieved, and the best effect of cleanly removing water glass and dust can be obtained.

Description

[0001] technical field [0002] The invention belongs to the technical field of molding sand recovery and regeneration, and in particular relates to a process method for regeneration and reuse of used sodium silicate sand. [0003] Background technique [0004] Using sodium silicate as a binder core to produce steel castings and iron castings, due to the fine structure of sand mixing, high hardness, easy demoulding, low cost, non-toxic and odorless, and less harmful to human health, therefore Wide range of applications. However, the recovery and utilization of the old water glass sand is not sufficient, and a large amount of waste sand is discharged outside, which not only wastes resources, but also causes serious pollution to the environment; some factories adopt the old sand recycling process, which has a large amount of waste water, which not only wastes water resources, but also increases sewage. Subsequent processing procedures such as treatment and discharge increase...

AI Technical Summary

Problems solved by technology

However, the recovery and utilization of the old water glass sand is not sufficient, and a large amount of waste sand is discharged outside, which not only wastes resources, but also causes serious pollution to the environment; some factories adopt the old sand recycling process, which has a large amount of waste water, which not only wastes water resources, but also increases sewage. Subsequent treatment processes such as treatment and discharge increase the input of production costs