Water glass waste sand regeneration optimizing treatment method and water glass waste sand regeneration optimizing treatment system

Abstract

The invention discloses a water glass waste sand regeneration optimizing treatment method and a waste glass waste sand regeneration optimizing treatment system. The method comprises the following steps: preparing water glass waste sand, and collecting casting heat treatment waste water, and storing the waste water into a heat treatment water tank; sending the water glass waste sand and hot water into the heat treatment water tank according to a given ratio into a water treatment area I, mixing and stirring the water glass waste and the hot water, and carrying out the primary demolding treatment; sending the mixture into a water treatment area II, adding a chemical releasing agent, and carrying out further demolding treatment; carrying out sand-water separation by utilizing a sand-water separator, sending the waste water into a water treatment area III, and drying and cooling the wet sand; and purifying the waste water, and recycling the purified water. By adopting the cast waste heat water and two-stage regeneration process, the removal rate of Na2O is high; the obtained regenerated sand is good in quality, the roundness of the sand is good, the mud content is low, and the strength of the regenerated sand is high; meanwhile, the waste heat water produced after the casting heat treatment quenching is adequately utilized, the sand regeneration time is shortened, the water consumption is small, and the double-circulation recycling of the casting waste sand and waste water is realized.

Description

technical field [0001] The invention relates to the technical field of molding sand recovery and regeneration, in particular to a regeneration method of water glass waste sand. Background technique [0002] At present, in the production technology of cast steel and iron castings, ordinary CO 2 Hardened water glass sand is widely used because of its simple process and low cost. However, the waste sand produced by this process has high residual strength and poor collapsibility, and it is difficult to clean the casting and regenerate the waste sand; and the addition of water glass is usually as high as 5% to 8%. Because the surface of the discarded water glass waste sand is covered with a large amount of binder, due to the existence of the binder, when the old sand is reused, it shows shortcomings such as low strength of the molding sand, poor surface quality of the casting, and many internal defects, which hinders the use of the old sand. repeated use, and the main component...

AI Technical Summary

Problems solved by technology

However, there are still some defects in wet regeneration: compared with dry regeneration, the equipment system of wet regeneration is more complicated; more importantly, the amount of sewage generated by wet regeneration is large, and improper treatment can easily cause secondary pollution and form The sewage needs to be recycled or discharged harmlessly after sewage treatment, resulting in high cost of recycled sand

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