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Additive of baking filler for carbon for aluminum

A technology of fillers and additives, applied in the field of carbon roasting, can solve the problems of high moisture and ash content in metallurgical coke, increase the production cost of carbon products, and affect the quality of aluminum carbon, so as to improve thermal conductivity, benefit environmental protection, improve The effect of production efficiency

Inactive Publication Date: 2011-08-31
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcined petroleum coke and metallurgical coke have limited resources and tight supply of raw materials, resulting in price increases and increasing the production cost of carbon products. Moreover, metallurgical coke has high moisture and ash content, which not only needs to be dried before use, but also easy Bonded on the surface of the raw block, affecting the quality of aluminum carbon; while the particle size of alumina powder is too fine, it is easy to enter the fire path during the roasting process, not only the burning loss rate is high, but also there is a hidden danger of blocking the fire path

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add brown corundum / or white corundum with a particle size of 0.5-10mm, accounting for 5% of the mass of the filler, to the existing roasted filler, press the anode paste into Φ50*80mm samples, a total of four, and put the filler And the samples were put into the laboratory roasting furnace and roasted at 1000°C. The surface of the obtained carbon product is smooth and free of bonding and oxidation cracking. The measured average physical and chemical indicators: the room temperature resistivity is 53.15μΩ·m, and the bulk density is 1.56g / cm 3 , The compressive strength is 42mPa. The firing time is shortened by 50 minutes compared with that without adding corundum, and the burning loss rate of filler is reduced by 10.5kg / t-C.

Embodiment 2

[0029] Brown corundum / or white corundum accounting for 10% of the mass of the filler and having a particle size of 0.5-8 mm is added to the existing calcined filler, and anodic roasting is performed under the conditions described in Example 1. The surface of the obtained anode sample is smooth and free of bonding and oxidation cracking. The measured room temperature resistivity is 54.13μΩ·m and the bulk density is 1.55g / cm 3 , The compressive strength is 40mPa. The firing time is shortened by 75 minutes compared with that without adding corundum, and the burning loss rate of filler is reduced by 12.6kg / t-C.

Embodiment 3

[0031] Brown corundum / or white corundum accounting for 15% of the mass of the filler and having a particle size of 2-10 mm is added to the existing calcined filler, and anodic roasting is performed under the conditions described in Example 1. The surface of the obtained anode sample is smooth, free of bonding, and free of oxidation cracking. The measured room temperature resistivity is 54.46μΩ·m, and the bulk density is 1.57g / cm 3 , The compressive strength is 43mPa. The cooling time of the roasted product is shortened by 93 minutes compared with that without adding corundum, and the burning loss rate of the filler is reduced by 13.2kg / t-C.

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Abstract

The invention discloses an additive of a baking filler used in the baking process of carbon for aluminum, which comprises brown fused alumina and / or white fused alumina accounting for 5-45% of the mass percent of the filler. The additive of the baking filler can improve the heat conducting capacity of the filler, shorten the time for transferring the heat from a flame path to a carbon raw block, improve the heat efficiency, and reduce the consumption of the baking fuel; and the additive can lower the burning-out rate of the filler and can not easily cause the condition that the filler is bonded, agglomerated and adsorbed on the surface of the carbon raw block.

Description

technical field [0001] The invention relates to the technical field of carbon roasting, in particular to an additive for a carbon roasting filler for aluminum. Background technique [0002] Roasting is a key process in the production process of aluminum carbon products. Roasting refers to the process of heat treatment of products under the protection of fillers according to the set heating curve, the ultimate goal is to improve the physical and chemical properties of products. The pros and cons of the roasting process are directly related to the quality of the carbon product itself and the quality of subsequent uses such as electrolysis. [0003] The filler in the roasting furnace is an indispensable raw material in the roasting process, and it is the substance filled between the carbon blocks during the roasting process, which can play the following main functions: [0004] 1. Isolate the air so that it does not come into direct contact with the product to prevent the raw...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 唐剑高小明夏春福龚克成
Owner SNTO TECH GRP
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