Foundry molding sand containing blast furnace slag

Abstract

The invention discloses foundry molding sand containing blast furnace slag. The foundry molding sand is prepared from the raw materials in parts by weight: 40-55 parts of mudstone particle, 3-5 parts of waste aluminum powder, 7-9 parts of graphite powder, 6-8 parts of bentonite, 2-5 parts of plant ash, 4-6 parts of granular blast furnace slag and 8-12 parts of water. The foundry molding sand is prepared by the steps: 1) weighing the plant ash, the granular blast furnace slag and the bentonite according to the proportion, and adding water accounting for the total quantity of 35-40 percent. With the adoption of the foundry molding sand, as coal powder is not added, and straw powder and the plant ash are mainly used as antisticking additives, the cost is lowered, and the surface smoothness of a casting is also improved.

Description

technical field [0001] The invention relates to the field of casting, in particular to the field of sand casting. Background technique [0002] At present, the castings produced by sand casting account for 80% of the total castings. The molding material of sand casting plays an important role in casting production, which directly affects the energy consumption, environmental pollution, and casting quality, production efficiency and cost of casting production. Coal powder clay green sand, which is widely used at home and abroad, is generally made of raw sand, binders, coal powder additives, etc. and water. It has a certain anti-sticking sand effect, low material cost, and high production efficiency. However, its consumption is large, the emission is serious, and the coal powder is burned and decomposed in the casting process to produce toxic gas pollution. [0003] It can be seen from the above that coal powder clay green sand has not met the needs of the scientific develop...

AI Technical Summary

Problems solved by technology

Coal powder clay green sand, which is widely used at home and abroad, is generally made of raw sand, binders, coal powder additives, etc. and water. It has a certain anti-sticking sand effect, low material cost, and high production efficiency. However, its consumption is large, the emission is serious, and the coal powder is burned and decomposed in the casting process to produce toxic gas pollution.

[0003] It can be seen from the above that coal powder clay green sand is no longer suitable for the needs of the scientific development of the foundry industry and the current environmental protection policy of reducing consumption and emission