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Calcium hexaluminate based pouring material not polluting high-purity aluminum solution

A technology of calcium hexaaluminate and castables, which is applied in the field of refractory materials and can solve problems such as easy damage to the furnace lining and contamination of the melt

Inactive Publication Date: 2011-10-12
江苏瑞复达高温新材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The furnace lining material composed of the above oxides is not only easy to damage the furnace lining, but also the Si, Fe, etc. generated by the reaction enter into the molten aluminum, polluting the melt

Method used

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  • Calcium hexaluminate based pouring material not polluting high-purity aluminum solution

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Effect test

Embodiment 1

[0026] The mass percentage of each component is calcium hexaaluminate aggregate 32-38%, white corundum aggregate 28-31%, calcium hexaaluminate fine powder 8-12%, white corundum fine powder 10-13%, alumina powder 5% -8%, silica powder 1-2%, pure calcium aluminate cement 7-9%, admixture sodium tripolyphosphate, sodium hexametaphosphate, barium sulfate mixture 1-2%.

Embodiment 2

[0028] The mass percentage of each component is calcium hexaaluminate aggregate 50-60%, white corundum aggregate 5-15%, calcium hexaaluminate fine powder 10-15%, white corundum fine powder 5-10%, alumina powder 3 -5%, silica micropowder 1-2%, pure calcium aluminate cement 7-9%, admixture sodium tripolyphosphate, sodium hexametaphosphate, barium sulfate mixture 2-3%.

Embodiment 3

[0030] The mass percentage of each component is calcium hexaaluminate aggregate 5-15%, white corundum aggregate 50-60%, calcium hexaaluminate fine powder 5-10%, white corundum fine powder 10-15%, alumina powder 8 -10%, silica powder 1-2%, pure calcium aluminate cement 7-9%, admixture sodium tripolyphosphate, sodium hexametaphosphate, barium sulfate mixture 0.5-1%.

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Abstract

The invention discloses a calcium hexaluminate based lining pouring material not polluting components of high-purity aluminum although contacting with a high-purity solution in the refinement, fusion and insulation processes of the high-purity aluminum. Raw materials for preparing the pouring material comprise the following components: a synthesized calcium hexaluminate material, an ancillary material, micropowder, cement and an additive. By using the pouring material, a defect that the existing non-stick aluminum material has a certain aluminum corrosion resisting effect on the ordinary alloy but can not meet the high-purity requirement of the high-purity aluminum for the influence and pollution of components in an aluminum solution is overcome so as to solve the pollution problem of brasque material on the high-purity aluminum solution.

Description

technical field [0001] The invention relates to a refractory material for smelting, refining and heat preservation process equipment (including melting furnace, heat preservation furnace and water transfer ladle), in particular to a calcium hexaaluminate-based castable that does not pollute high-purity aluminum melt. Background technique [0002] According to the aluminum content, aluminum can be divided into primary aluminum, refined aluminum and high-purity aluminum. There are two ways to express high-purity aluminum: directly write the composition, such as 99.95%, 99.999%, etc.; use "number and N" or "number + N + number" to express, such as 4N (99.99%), 4N6 (99.996%) Wait. If its composition is between 4N and 5N, it can also be written as "4N+". Although there is no uniform standard for the content of high-purity aluminum in various countries, it usually refers to aluminum with an aluminum content > 4N. Because high-purity aluminum has many unique and excellent pro...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 宋学斌罗晨泽张宝奎
Owner 江苏瑞复达高温新材料股份有限公司
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