Preparation process of low alloy steel bucket tooth shell by using waste sand as raw material of easy disintegration clay sand

By preparing easily collapsible clay sand from waste sand, and combining it with CH28 type aqueous solution and magnesium peroxide, the environmental pollution and resource waste problems in the casting of low alloy steel bucket teeth were solved, and efficient recycling of waste sand and improvement of casting quality were achieved.

CN117753921BActive Publication Date: 2026-04-17FUJIAN TONGXING AUTOMOBILE SYNCHRONIZERS CO LTD
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Patent Information

Application Number
CN202311797620.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-26
Publication Date
2026-04-17
Estimated Expiration
2043-12-26

AI Technical Summary

Technical Problem

The existing low-alloy steel bucket tooth casting process has problems such as high gasification rate, emission of harmful substances, environmental pollution and waste of resources, especially the high cost and solid waste emission caused by the use of red coal powder in the casting process of gray cast iron and non-ferrous metals.

Method used

Easily collapsible clay sand made from waste sand is used to prepare an easily collapsible low-alloy steel bucket tooth shell using a formula containing CH28 type aqueous solution, magnesium peroxide, and other components. When used in conjunction with a vertical molding line, it achieves both bonding and collapsible effects, reduces the amount of bentonite used, and improves the recycling rate of waste sand.

Benefits of technology

This technology achieves environmental friendliness by using low-alloy steel bucket tooth shells, reducing solid waste emissions and new sand consumption, improving waste sand recycling rates, lowering production costs, and ensuring casting quality.

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Abstract

This invention relates to the field of casting technology, specifically to a process for preparing easily collapsible clay sand and low-alloy steel bucket tooth shell molds using waste sand as raw material. The process is characterized by a formula comprising the following parts by weight: 90-110 parts recycled waste sand, 1-6 parts binder, 2-12 parts collapsing liquid, 0.2-2 parts thermal conductive agent, and 2-6 parts water. The binder is sodium-based bentonite, the collapsing liquid is a CH28 type aqueous solution, and the thermal conductive agent is magnesium peroxide. This invention is environmentally friendly, activating the effective binding capacity of bentonite, thus reducing the amount of bentonite added by 50%, while achieving 100% complete collapsibility of the low-alloy steel bucket tooth shell mold. It exhibits excellent collapsibility performance and achieves 95% recycling of waste sand, significantly reducing solid waste emissions and new sand consumption, saving new sand costs, and making a significant contribution to environmental and resource protection.
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