Process for regenerating hot-wet clay sand for 100% core production

Abstract

The invention discloses a hot-wet process clay sand regeneration 100% core production technology, and particularly relates to the technical field of sand core production, the hot-wet process clay sand regeneration 100% core production technology comprises the following steps: demoulding: using a demoulding machine to carry out secondary demoulding and dedusting treatment on casting waste sand, removing mud and ash in the casting waste sand, and carrying out secondary demoulding and dedusting treatment on the casting waste sand; according to the hot method, resin films on the surfaces of sand grains and pulverized coal in clay sand are burnt out through high-temperature roasting, according to the wet method, casting waste sand is washed for 40-50 minutes through a scrubbing machine, blades in the scrubbing machine rotate to rub with the casting waste sand, mud and clay films in the casting waste sand are washed away through cooperation of water, and washing wastewater is recycled after the mud is filtered out through a water treatment system. And acidizing treatment: acidizing the circulating water. According to the method, 100% of the regenerated clay sand can be used for core making, the acid consumption value and the mud content of the treated regenerated sand are low, indexes are qualified, the regenerated sand can be used without being matched with new sand, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of sand core production, and more particularly, the invention relates to a process in which the regeneration of hot wet clay sand can be used for 100% core production. Background technique [0002] The annual production of waste foundry sand is about 110% of the tonnage of castings. The output is huge and occupies a lot of space. At present, the recycling rate of waste foundry sand in foundries around the world is less than 20%. Most of them are disposed of by discarding and landfilling. According to the requirements of the new version of the National Law on the Prevention and Control of Environmental Pollution by Solid Waste, the environmental protection pressure of foundry enterprises is increasing day by day, and it needs to spend a lot of money to deal with waste sand. [0003] Although the waste sand regeneration treatment method in the prior art can achieve the purpose of waste sand regeneration to a c...

AI Technical Summary

Problems solved by technology

[0003] Although the waste sand regeneration treatment method in the prior art can achieve the purpose of waste sand regeneration to a certain extent, there are still many shortcomings in actual use, such as the output of the waste sand regeneration treatment method in the prior art After the clay sand is regenerated, the acid consumption value and mud content are high, resulting in unqualified indicators. It needs to be used in small quantities with new sand, which leads to higher costs