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Vanishing mould casting technique of blast furnace cooling wall

A technology of lost foam casting and cooling stave, which is used in manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of high casting process cost, low labor efficiency, poor casting quality, etc. The effect of increased recycling rate, reduced material consumption and environmental pressure

Inactive Publication Date: 2008-05-28
肖燕鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of high cost, poor casting quality, high labor intensity, low labor efficiency, heavy environmental pollution in the production process, etc. of the current blast furnace stave casting process, and provide a method with simple method and low cost. The lost foam casting process of the blast furnace stave has the advantages of accurate casting size, smooth surface, high labor efficiency, low labor intensity, light pollution in the production process and easy control.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of lost foam casting technology of cast copper blast furnace stave, its method is,

[0041] 1) Stew cooling wall water pipe;

[0042] 2) Make a stave foam plastic model with a built-in stave water pipe;

[0043] 3) Brush refractory paint on the surface of the foam plastic model, and dry at 40°C for 30 hours;

[0044] 4) Assemble the gating system;

[0045] 5) Packing molding, vibrating sand mold;

[0046] 6) Vacuum pouring, the vacuum degree is -0.02, the pouring temperature is 1000°C, and the pressure holding time is 10 minutes after pouring;

[0047] 7) Shakeout cleaning.

[0048] Wherein step 2) in, the method of making stave foamed plastics model is,

[0049] 1) After adding the shrinkage amount according to the stave drawing, make the two-end template, the water pipe position parting surface template, the brick groove template, and the water pipe and bolt hole boss template;

[0050] 2) Carry out blanking and cutting of the main body of the foam model ...

Embodiment 2

[0057] A kind of lost foam casting technology of cast steel blast furnace stave, its method is,

[0058] 1) Stew cooling wall water pipe;

[0059] 2) Make a stave foam plastic model with a built-in stave water pipe;

[0060] 3) Brush refractory paint on the surface of the foam plastic model, and dry it at 50°C for 48 hours;

[0061] 4) Assemble the gating system;

[0062] 5) Packing molding, vibrating sand mold;

[0063] 6) Vacuum pouring, the vacuum degree is between -0.08MPa, the pouring temperature is 1600°C, and the pressure holding time is 60 minutes after pouring;

[0064] 7) Shakeout cleaning.

[0065] The method of step 2) is the same as that of embodiment 1, and will not be repeated here.

Embodiment 3

[0067] A kind of lost foam casting technology of cast iron blast furnace stave, its method is,

[0068] 1) Stew cooling wall water pipe;

[0069]2) Make a stave foam plastic model with a built-in stave water pipe;

[0070] 3) Brush refractory paint on the surface of the foam plastic model, and dry it at 42°C for 35 hours;

[0071] 4) Assemble the gating system;

[0072] 5) Packing molding, vibrating sand mold;

[0073] 6) Vacuum pouring, the vacuum degree is -0.03, the pouring temperature is 1260°C, and the pressure holding time is 20 minutes after pouring;

[0074] 7) Shakeout cleaning.

[0075] The method of step 2) is the same as that of embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a lost foam casting process used for a blast furnace cooling wall, aiming to solve the problems of prior casting technique of blast furnace cooling wall that casting cost is high, casting quality is poor, labor intensity is high, working efficiency is low and manufacturing process has heavy pollution, etc. The invention has the advantages that the method is simple, the cost is low, the size of cast pieces is accurate, the surface is smooth, the working efficiency is higher the, labor intensity is lower, the manufacturing process has lighter pollution and is easy for control. The method of the process is as the following: 1) water tubes of the cooling wall are stewed and manufactured; 2) a cooling wall foam plastic model in which the cooling wall water tubes are arranged is manufactured; 3) refractory dope is painted on the surface of the foam plastic model and is dried for 30 to 48 hours at a temperature from 40 to 50 DEG C; 4) a casting system is assembled; 5) boxing-up, forming and vibration for shape are carried out; 6) vacuumizing casting is carried out, with vacuum degree from minus 0.02 to minus 0.08 MPa and casting temperature from 1000 to 1600 DEG C; after the casting, pressing time is 10 to 60 minutes; 7) shaking and cleaning are carried out.

Description

technical field [0001] The invention relates to a casting process of a cooling wall of a blast furnace, in particular to a lost foam casting process of a cooling wall of a blast furnace. Background technique [0002] Blast furnace cooling stave is the main water-cooling equipment of iron-making blast furnace body. Traditional production adopts water glass sand casting, ordinary clay sand casting and resin sand casting. The production process adopts lost foam process to produce blast furnace cast steel, cast iron, cast copper and Iron, copper steel composite stave. [0003] The lost foam casting process (also known as vacuum solid mold casting or negative pressure solid mold casting) is to use foam plastics to make models, use dry sand for boxing modeling, perform vibration and compaction during the boxing process, and pump negative pressure during the pouring process. A new form of casting process. [0004] The lost foam casting process is known as "the new casting technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/06B22C9/04
Inventor 肖燕鹏孟庆蓉
Owner 肖燕鹏
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