Additive for wet clay sand and preparation method of additive

A technology of green sand and additives, applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of dusty clay, substandard PM value, air pollution, etc. health effects

Inactive Publication Date: 2019-10-22
山西星缘和环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another important property of pulverized coal is softening and coking at 500-600°C. This spongy substance filled between the pores of the gravel can absorb the violent expansion of quartz sand at around 600°C, thereby reducing the formation of mold sand due to expansion.

Method used

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  • Additive for wet clay sand and preparation method of additive

Examples

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Comparison scheme
Effect test

Embodiment 1

[0026] An additive for clay green sand in this implementation is made from the following raw materials: 53 kg of sodium bentonite, 20 kg of fly ash, 11 kg of coal series kaolin and 9 kg of plant ash, wherein the particle size of the fly ash is 20 μm.

[0027] The preparation method of the additive for clay green sand in this embodiment includes the following steps: weighing each raw material for use according to the weight, mixing the spare raw materials and stirring evenly to obtain the additive for clay green sand.

Embodiment 2

[0029] A kind of clay green sand additive of this implementation, comprises following raw material to make: Na-based bentonite 53kg, fly ash 20kg, coal series kaolin 11kg and plant ash 9kg, wherein the particle diameter of fly ash is 30 μ m, the particle diameter of quartz sand For 40-100 mesh.

[0030] The preparation method of the additive for clay green sand in this embodiment includes the following steps: weighing each raw material for use according to the weight, mixing the spare raw materials and stirring evenly to obtain the additive for clay green sand.

Embodiment 3

[0032] A kind of additive for clay green molding sand of this implementation, comprises following raw material to make: sodium-based bentonite 53kg, fly ash 20kg, coal series kaolin 11kg, plant ash 9kg and quartz sand 2.5kg, wherein the particle diameter of fly ash is 25 μ m, The particle size of quartz sand is 40-100 mesh.

[0033] The preparation method of the additive for clay green molding sand in this embodiment includes the following steps: weighing each raw material for use according to the weight of each raw material, mixing the spare raw materials and stirring evenly to obtain the additive for clay green molding sand; wherein, The sodium-based bentonite has been modified, and the specific modification method is as follows: dissolve the sodium-based bentonite in water, add cetyltrimethylammonium chloride and ethanolamine, and react at 80° C. for 16 hours. The sodium-based bentonite and The mass ratio of water is 1:15, the mass ratio of cetyltrimethylammonium chloride a...

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Abstract

The invention relates to an additive for wet clay sand and a preparation method of the additive. The additive is prepared from the raw materials: sodium bentonite, pulverized fuel ash, coal series kaolinite and plant ash. The prepared additive can be moulded without the addition of pulverized coal and pottery clay, and is nontoxic, tasteless, smokeless, dust-free, and clean, the atmospheric dust pollution is reduced, the air quality is improved, the ecological environment is improved, and the health of the masses is ensured; and moulding sand prepared from the addition has a sand adherence prevention effect, and a casting has a smooth and fine surface, and has high toughness. Since no gas generated by pulverized coal exists, the air permeability mechanism of moulding sand is improved, wastes of casting shrinkage porosities and cavities and subcutaneous blowholes due to low air permeability are reduced, the finished product rate of the casting is effectively improved, and the inherent quality is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of green sand, and in particular relates to an additive for clay green sand and a preparation method thereof. Background technique [0002] At present, the castings produced by sand casting account for 80% of the total castings. Sand casting molding materials play an important role in production, which directly affects the energy consumption, environmental pollution, and casting quality, production efficiency and cost of casting production. Widely used coal powder clay green sand is generally formed by mixing raw sand, binders, coal powder additives, etc. Large, serious emissions. [0003] In order to avoid defects such as sand sticking and sand inclusions in castings, a certain amount of coal powder and clay should be added to the green sand. The volatile matter in the coal powder is pyrolyzed under high temperature conditions to form a layer of carbon film coated on the mold-metal interface. , It acts as...

Claims

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Application Information

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IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 李洪瑞
Owner 山西星缘和环保有限公司
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