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Preparing method for re-smelting aluminium ball shape casting sand

A spherical casting sand, aluminum technology, applied in casting molding equipment, casting molds, manufacturing tools, etc., can solve problems such as low production efficiency, and achieve the effect of improving production efficiency, superior mechanical properties, and improving production efficiency

Inactive Publication Date: 2006-11-08
宋立群
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has pioneered the use of bauxite or bauxite tailings to prepare foundry sand, the production efficiency of this method is relatively low. In order to reduce its production cost, further improvement will be very necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] a. Calcining: calcining the bauxite ore at 1000-1400 degrees Celsius for 1-2 hours;

[0015] b. Preheating: place the bauxite cooling material in step a in a rotary kiln and preheat to 800-1400 degrees Celsius, or place the bauxite tailings in a rotary kiln to preheat to 800-1400 degrees Celsius;

[0016] c. Melting: Add the preheated material of step b into the electric arc furnace for melting;

[0017] d. Injection ball making: the molten liquid in step c is blown into balls under the overflow;

[0018] e. Screening: Screen the chilled balls in step d, and get balls with a diameter of 0.01-2.9 mm to obtain remelted aluminum spherical casting sand.

Embodiment 2

[0020] a. Calcination: calcining the bauxite ore at 1100-1300 degrees Celsius for 1-2 hours;

[0021] b. Preheating: place the bauxite cooling material in step a in a rotary kiln and then preheat to 1000-1200 degrees Celsius, or place the bauxite tailings in a rotary kiln to preheat to 1000-1200 degrees Celsius;

[0022] c. Melting: Add the preheated material in step b into a single-point electric arc furnace for melting;

[0023] d. Injection ball making: the molten liquid in step c is blown into balls under the overflow;

[0024] e. Screening: Screen the chilled balls in step d, and get balls with a diameter of 0.1-20 mm to obtain remelted aluminum spherical casting sand.

Embodiment 3

[0026] a. Calcining: calcining the bauxite ore at 1150-1250 degrees Celsius for 1-2 hours;

[0027] b. Preheating: place the bauxite cooling material in step a in a rotary kiln and then preheat to 1100-1150 degrees Celsius, or place the bauxite tailings in a rotary kiln to preheat to 1100-1150 degrees Celsius;

[0028] c. Melting: Add the preheated material in step b into a three-point electric arc furnace for melting;

[0029] d. Injection ball making: the molten liquid in step c is blown into balls under the overflow;

[0030] e. Screening: Screen the chilled balls in step d, and get balls with a diameter of 0.05-1.5 mm to obtain remelted aluminum spherical casting sand.

[0031] According to the production method of the prior art, a single furnace can produce 6 tons of foundry sand on average every day (24 hours); after adopting the above-mentioned preparation method of the present invention, 8.4 to 12 tons of foundry sand can be produced every day by using a single-point ...

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PUM

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Abstract

The preparation method of the remelted aluminum spherical casting sand of the present invention belongs to the process of casting or mainly used for thermosetting material molding, and is a new method of high efficiency and energy saving for preparing casting sand by using bauxite or bauxite tailings as raw materials. The preparation method comprises the following steps: calcining bauxite ore at 1000-1400 degrees Celsius for 1-2 hours; placing the above-mentioned bauxite cooling material in a rotary kiln and then preheating to 800-1400 degrees Celsius, or bauxite ore Put the tailings in a rotary kiln to preheat to 800-1400 degrees Celsius; put the preheated material into the electric arc furnace to melt; blow the molten liquid under the overflow to make balls; 2.9 mm pellets, that is, the remelted aluminum spherical foundry sand finished product. The invention has the advantages of simple production process, energy saving and consumption reduction, high production efficiency, suitable for large-scale production and the like.

Description

technical field [0001] The invention belongs to casting or a technology mainly used for thermosetting material molding, in particular to a high-efficiency preparation method of remelted aluminum spherical casting sand. Background technique [0002] The preparation method of the remelted aluminum spherical casting sand in the prior art is a disclosed technology, such as the patent whose publication number is CN 1468673A. Although it has created a precedent for using bauxite or bauxite tailings to prepare foundry sand, the production efficiency of this method is relatively low. In order to reduce its production cost, further improvement will be very necessary. Contents of the invention [0003] The purpose of the present invention is to solve the deficiencies of the prior art, and improve a new method of high efficiency and energy saving for preparing foundry sand with bauxite or bauxite tailings as raw materials. Its preparation method comprises the following steps: [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00
Inventor 邹方梁宋立群
Owner 宋立群
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