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Roasting inserts of carbon elements for aluminium

A filler and carbon technology, which is applied in the field of aluminum carbon roasting filler, can solve the problems of high moisture and ash content in metallurgical coke, affecting the quality of aluminum carbon, and easy bonding to the surface of green blocks, etc., to improve thermal conductivity and save energy. Resources and the effect of environmental protection

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

Moreover, due to limited resources, tight supply of raw materials, and rising prices, it is not suitable to be widely promoted in industrial production; metallurgical coke has high moisture and ash content, not only needs to be dried before use, but also easily sticks to the surface of the green block, affecting Carbon Quality for Aluminum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw aluminum carbon paste was used in the laboratory at 200kg / cm 2 The force is pressed to form a sample, and the brown corundum / or white corundum with a particle size of 0.5-10 cm is used as a calcined filler, accounting for 50% of the total mass of the filler, and roasted in a laboratory roaster. The surface of the obtained carbon sample for aluminum is smooth, free of bonding, and free of oxidative cracking. The measured room temperature resistivity is 53.23μΩ·m, and the bulk density is 1.56g / cm 3 , the compressive strength is 42mPa, the cooling time of the roasted product is shortened by 151 minutes compared with the use of existing fillers, and the burning loss rate of the roasted fillers is reduced by 11.5kg / t-C.

Embodiment 2

[0033] The raw aluminum carbon paste was used in the laboratory at 200kg / cm 2 The force is pressed to make a sample, and the brown corundum / or white corundum with a particle size of 0.5-7cm is used as the calcined filler, accounting for 55% of the total mass of the filler, and roasted in a laboratory roaster. The surface of the obtained carbon sample for aluminum is smooth, free of bonding, and free of oxidative cracking. The measured room temperature resistivity is 54.02μΩ·m, and the bulk density is 1.57g / cm 3 , the compressive strength is 46mPa, the cooling time of the roasted product is shortened by 157 minutes compared with that of the existing filler, and the burning loss rate of the roasted filler is reduced by 11.2kg / t-C.

Embodiment 3

[0035] The raw aluminum carbon paste was used in the laboratory at 200kg / cm 2 The force is pressed to form a sample, and the brown corundum / or white corundum with a particle size of 1-10 cm is used as the calcined filler, which accounts for 60% of the total mass of the filler, and is roasted in a laboratory roaster. The surface of the obtained carbon sample for aluminum is smooth, free of bonding, and free of oxidative cracking. The measured room temperature resistivity is 55.45μΩ·m, and the bulk density is 1.56g / cm 3 , the compressive strength is 41mPa, the cooling time of the roasted product is shortened by 169 minutes compared with that of the existing filler, and the burning loss rate of the roasted filler is reduced by 12.9kg / t-C.

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Abstract

The invention discloses a roasting inserts used in roasting process of carbon elements for aluminium, Including ecorundum brown corundum and / or white corundum of more than 50% in mass percentage. The invention provided roasting inserts has high coefficient of heat conduction, Which can reducing time of heat conducting from a fire channel to the carbon elements producing area, Improving heat efficiency, Saving application amount of roasting raw material, Shorting cooling time of roasting finished product; And low burning loss rate, And cases of bonding together, adsorbing onto surface of the carbon elements are not easily appeared.

Description

technical field [0001] The invention relates to the technical field of carbon roasting for aluminum, in particular to a carbon roasting filler for aluminum. Background technique [0002] Roasting of carbon for aluminum is a key process in the production process of carbon for aluminum. The quality of the roasting process is directly related to the quality of carbon for aluminum itself and the quality of subsequent processes such as electrolysis. One of the main factors affecting the pros and cons of the roasting process is the filler in the carbon roasting furnace for aluminum. [0003] The filler is the substance covered on the surface of the aluminum carbon green block during the roasting process, which can play the following main functions: [0004] 1. Isolate the air, prevent the raw block from being in direct contact with the flame, and prevent it from being oxidized at high temperature; [0005] 2. Conduct the heat of the flame to the product and slow down the volatil...

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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