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Steel casting insulated feeder for high-yield casting

A high-yield, thermal insulation riser technology, applied in the field of risers, can solve the problems of damage to casting performance, shrinkage porosity, shrinkage cavity, etc., and achieve the effects of increasing utilization ratio, increasing porosity, and high replacement rate

Inactive Publication Date: 2020-07-17
霍山县东胜铸造材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most metals will experience liquid shrinkage, solidification shrinkage and solid shrinkage during the cooling process. If the first two shrinkages cannot be compensated in time, casting defects such as shrinkage cavities and shrinkage porosity will be formed in the casting, which will damage the performance of the casting.

Method used

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  • Steel casting insulated feeder for high-yield casting
  • Steel casting insulated feeder for high-yield casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high-yield casting steel casting heat insulation riser, its raw materials include: 20kg of aluminum powder, 16kg of modified inorganic powder, 4kg of carbon fiber, 6kg of ferric oxide, 5kg of quartz sand, 12kg of expanded perlite, 1kg of cryolite, Potassium carbonate 2kg, sodium carbonate 1kg, gelatin 1kg, microcrystalline cellulose 2kg, water 5kg.

[0022] The modified inorganic powder is mixed with 30kg of pretreated inorganic powder and 8kg of calcium carbonate and ground for 8 minutes, the grinding pressure is 1.5kPa, the grinding speed is 2000r / min, and then sent to the calciner to rapidly heat up to 850°C, calcined for 10min, cooled, and pulverized get.

[0023] The pretreatment inorganic powder is prepared by the following process: crush 10kg of bentonite to 80 mesh, put it into a mixer, add 40kg of water, 2kg of polyacrylic acid, and 1kg of sodium bromide, and stir at a temperature of 100°C for 5 hours at a stirring speed of 80r / min. Filter and dry to a water...

Embodiment 2

[0026] A high-yield casting steel casting insulation riser, its raw materials include: aluminum powder 26kg, modified inorganic powder 10kg, carbon fiber 12kg, ferric oxide 2kg, quartz sand 10kg, expanded perlite 4kg, cryolite 3kg, Potassium carbonate 1kg, sodium carbonate 2kg, rosin 2kg, water 15kg.

[0027] The modified inorganic powder is mixed with 20kg of pretreated inorganic powder and 16kg of calcium carbonate and ground for 4 minutes, the grinding pressure is 2kPa, the grinding speed is 1000r / min, and then sent to the calciner to rapidly heat up to 950°C, calcined for 5min, cooled, and pulverized to obtain .

[0028] The pretreatment inorganic powder is prepared by the following process: crush 15kg of bentonite to 60 mesh, put it into a mixer, add 60kg of water, 1kg of polyacrylic acid, and 2kg of sodium bromide, and stir at a temperature of 90°C for 10 hours at a stirring speed of 50r / min. Filter and dry until the water content is 20% to obtain pretreated inorganic p...

Embodiment 3

[0031] A high-yield casting steel casting heat insulation riser, its raw materials include: aluminum powder 22kg, modified inorganic powder 14kg, carbon fiber 6kg, ferric oxide 5kg, quartz sand 6kg, expanded perlite 10kg, cryolite 1.5kg , potassium carbonate 1.7kg, sodium carbonate 1.4kg, sodium carboxymethylcellulose 2.8kg, water 8kg.

[0032] The modified inorganic powder is mixed with 28kg of pretreated inorganic powder and 10kg of calcium carbonate for 7 minutes, the grinding pressure is 1.6kPa, the grinding speed is 1800r / min, and then sent to the calciner to rapidly heat up to 880°C, calcined for 8min, cooled, and pulverized get.

[0033] The pretreatment inorganic powder is prepared by the following process: crush 12kg of bentonite to 75 mesh, put it into a mixer, add 45kg of water, 1.7kg of polyacrylic acid, and 1.3kg of sodium bromide, and stir at a temperature of 98°C for 6 hours at a stirring speed of 70r / min, filtered, and dried to a water content of 16%, to obta...

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Abstract

The invention discloses a steel casting insulated feeder for high-yield casting. The steel casting insulated feeder is prepared from raw materials in parts by weight: 20-26 parts of aluminum powder, 10-16 parts of modified inorganic powder, 4-12 parts of carbon fibers, 2-6 parts of iron trioxide, 5-10 parts of quartz sand, 4-12 parts of expanded perlite, 1-3 parts of cryolite, 1-2 parts of potassium carbonate, 1-2 parts of sodium carbonate, 2-3 parts of adhesive and 5-15 parts of water. The modified inorganic powder is obtained in the manner that pre-treated inorganic powder and calcium carbonate are mixed and ground for 4-8 min at the grinding pressure of 1.5-2 kPa, the mixture is calcined at the temperature of 850-950 DEG C for 5-10 min, and then the mixture is cooled and smashed. The pretreated inorganic powder is prepared through the following process that inorganic powder is smashed to 60-80 meshes, water, polyacrylic acid and sodium bromide are added, the material is stirred at the temperature of 90-100 DEG C for 5-10 h, the material is filtered, the material is dried until the water content is 15%-20%, and the pre-treated inorganic powder is obtained.

Description

technical field [0001] The invention relates to the technical field of risers, in particular to a thermal insulation riser for steel castings with high yield. Background technique [0002] Most metals will experience liquid shrinkage, solidification shrinkage and solid shrinkage during the cooling process. If the first two shrinkages cannot be compensated in time, casting defects such as shrinkage cavities and shrinkage porosity will be formed in the casting, which will damage the performance of the casting. [0003] Riser sleeve is an insulation product used in casting castings in the metallurgical industry, and is one of the indispensable auxiliary materials in the casting process. Its working principle is to use the heat storage function of the low thermal conductivity insulation material to reduce the heat loss of the molten metal in the riser sleeve, thereby prolonging the solidification time of the molten metal in the riser sleeve and improving its ability to feed cast...

Claims

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Application Information

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IPC IPC(8): B22C9/08B22D27/06B22C1/00B22C1/20
CPCB22C1/00B22C1/20B22C9/088B22D27/06
Inventor 卢世东余习华叶纯涛叶兵汪斌项学连蔡方元杨文
Owner 霍山县东胜铸造材料有限公司