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Semi-coke powder combination, molding sand containing combination and application to casting

A technology of blue carbon powder and composition, applied in the field of materials science, can solve the problems affecting the yield of castings and the mechanical properties of castings, high production cost, pollute the environment, etc., and achieve the effects of environmental protection, low cost and low sulfur content in the preparation process

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the use of casting coal powder in the above-mentioned casting affects the casting yield and casting mechanical properties, and at the same time, the production cost is high and the environment is polluted, the present invention provides a blue carbon powder composition, molding sand containing the composition and casting. application

Method used

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  • Semi-coke powder combination, molding sand containing combination and application to casting
  • Semi-coke powder combination, molding sand containing combination and application to casting
  • Semi-coke powder combination, molding sand containing combination and application to casting

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preparation of blue charcoal powder composition:

[0031] 1. Preparation of blue charcoal powder:

[0032] (1) Dehydrate semi-coke (also known as semi-coke, coke powder) to a water content of 1 (wt)%, crush and sieve to a particle size of 180 mesh; the above-mentioned dehydration refers to natural drying.

[0033] (2) Dehydrate semi-coke (also known as semi-coke, coke powder) to a water content of 10 (wt)%, crush and sieve to a particle size of 200 mesh; the above-mentioned dehydration refers to drying at 100°C in a drying tower.

[0034] (3) Dehydrate semi-coke (also known as semi-coke, coke powder) to a water content of 10 (wt)%, crush and sieve to a particle size of 200 mesh; the above-mentioned dehydration refers to drying at 150°C in a drying tower.

[0035] The blue charcoal powder prepared by 1, (one)-(three) in the embodiment 1 of table 1a, main technical index:

[0036] project

[0037] 2. Preparation of blue charcoal powder composition:

[0038] U...

Embodiment 2

[0055] Preparation of sand with blue charcoal powder:

[0056] The blue charcoal powder composition that present embodiment uses is the blue charcoal powder composition that 2, (four) prepare in embodiment 1.

[0057] (1) By reusing sand, new sand, bentonite (red volcanic sodium bentonite), blue charcoal powder according to 95 parts of recycled sand, 2 parts of new sand, 0.33 parts of bentonite, 0.2 parts by weight of blue charcoal powder composition dry mixing Finally, add 2% of the total weight of water and wet mix to obtain the molding sand containing blue charcoal powder. All the above-mentioned raw materials except semi-coke are crushed and sieved before dry mixing, and the sieving is 80-mesh sieve.

[0058] (2) By reusing sand, new sand, bentonite (red volcanic sodium bentonite), blue charcoal powder according to 95 parts of recycled sand, 2 parts of new sand, 0.33 part of bentonite, 0.2 parts by weight of blue charcoal powder composition dry mixing Finally, add 2% of th...

Embodiment 3

[0066] Molding sand containing blue charcoal powder composition for castings:

[0067] The molding sand used in this embodiment is the molding sand prepared in Example 2 (5).

[0068] The steps are: (1) molding: molding with molding sand containing blue charcoal powder composition; (2) pouring; (3) boxing and sand cleaning.

[0069] The specific operation of the molding is as follows: the mechanical sand mixing line mixes the sand, shakes out the sand, transports it to the molding line, performs mechanical molding, and obtains a sand mold.

[0070] The specific operation of the pouring is: burn the molten iron, pour the molten iron into the mold cavity, align the gate of the sprue cup when pouring, the pouring temperature is 1400°C, and entrain air during pouring, the pouring operation time is 7min, the sprue cup Take out the molten iron in the container after it solidifies, and place the pressed iron for 1 hour.

[0071] The specific operations of boxing and sand cleaning a...

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Abstract

The invention relates to a semi-coke powder combination, molding sand containing the combination and application to casting, belongs to the field of materialogy, and in particular, relates to a casting material and a casting process. The combination contains one or a mixture of two of semi-coke powder, starch or flour. Reused sand, new sand, bentonite and the semi-coke powder combination are mixedto prepare the molding sand for casting. The semi-coke powder combination or the molding sand is used for casting, so that used materials are few, the cost is low, the ash content and the sulfur content are low, such problems as blockage of molding sand holes by ash and casting air holes or casting sand holes formed by absorption of a lot of water are not generated, the casting quality is improved, and meanwhile, the environmental pollution is reduced when the workshop environment is greatly improved.

Description

technical field [0001] The invention relates to the field of material science, in particular to casting materials and casting techniques. Background technique [0002] At present, casting coal powder is generally used in the wet casting production of cast iron in the foundry industry at home and abroad. The amount of coal powder added in casting varies according to the casting size, alloy material and molding method, generally 3-8%. But casting coal powder still has some disadvantages, such as high ash and sulfur content in coal powder. The ash and sulfur in the coal powder are harmful substances, and the ash blocks the voids of the molding sand and absorbs a large amount of water. Under the high temperature of molten metal, moisture forms a gas phase and expands rapidly. Excessively expanded gas is difficult to discharge from the sand grains and enters the molten metal to form pores in the casting, or the gas will burst and fall off the surface of the molding sand to form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 周义
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