Re-molten spherical alumina casting sand and its prepn
A spherical casting sand and aluminum technology, applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of large heat release, low material reuse rate, poor mechanical strength, etc., to achieve rich sources of raw materials, production Low cost and good temperature resistance
Inactive Publication Date: 2004-01-21
阳泉中创陶粒股份有限公司
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AI Technical Summary
Problems solved by technology
But there are still many deficiencies, such as: poor high temperature resistance, poor collapsibility, and it is difficult to achieve high-precision casting
Poor mechanical strength, high amount of silt, large amount of heat release gas, which is not conducive to casting, but also pollutes the environment and is harmful to the health of operators
Low material reuse rate and high production cost
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0008] The composition of the remelted aluminum spherical casting sand of the invention is: 70-80% of aluminum oxide, 10-20% of silicon oxide, <5% of iron oxide and <5% of titanium oxide.
Embodiment 2
[0010] The preparation method of the remelted aluminum spherical foundry sand of the present invention is:
[0011] a. Calcining the bauxite ore at 1200-1300 degrees Celsius for 1-2 hours;
[0012] b. The calcined bauxite ore or calcined bauxite tailings are sprayed into balls in a molten state by an electric arc furnace;
[0013] c. Sieve the balls sprayed in b, and take the particles with a diameter of 0.2-1.0 mm to obtain the remelted aluminum spherical casting sand.
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The present invention relates to the formation technology of thermosetting material, and the re-molten spherical alumina casting sand is produced with alumyte or incinerated alumyte tail ore as material. The casting sand has the components including alumina 70-80 wt%, silica 10-20 wt%, ferric oxide less than 5 wt%, and titanium oxide less than 5 wt%. Its production process includes incineration of alumyte under 1000-1400 deg.c for 1-2 hr; blowing incinerated alumyte in molten state inside an electric arc furnace to make spheres; and sieving to take 0.1-2.9 mm grains as the casting sand product. The casting sand product has good heat resistance, high collapsibility, good demolding performance, low powdered and volatile component content, high mechanical strength, and other advantages and may be used in high precision casting mold.
Description
technical field [0001] The invention belongs to casting or a technology mainly used for thermosetting material molding, in particular to remelted aluminum spherical casting sand and its preparation method. Background technique [0002] The raw materials of foundry sand in the prior art are mainly shiying sand, Luo ore sand, coated sand, remelted magnesia and the like. Its components are mainly magnesium oxide and silicon oxide. Its application is relatively common, and its preparation technology is relatively mature. But there are still many deficiencies, such as: poor high temperature resistance, poor collapsibility, and it is difficult to achieve high-precision casting. Poor mechanical strength, high silt content, and large heat release gas are not conducive to casting, but also pollute the environment and are harmful to the health of operators. The material reuse rate is low and the production cost is high. Contents of the invention [0003] The purpose of the prese...
Claims
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IPC IPC(8): B22C1/00
Inventor 邹方梁宋立群
Owner 阳泉中创陶粒股份有限公司
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