Production method of novel environment-friendly anode carbon block

Abstract

The invention discloses a production method of a novel environment-friendly anode carbon block. The production method comprises the following steps of: respectively crushing and screening 88-92 parts of a dry material and 8-12 parts of phenolic resin; mixing and kneading the dry material for 20-25 minutes, adding phenolic resin, mixing and kneading for 20-25 minutes to obtain a paste material, uniformly putting the paste material into a mold in a vibration molding machine, performing compression molding by using a hydraulic machine, demolding and cooling to form a primary green anode carbon block; feeding the primary green anode carbon block obtained after demolding into a tunnel type electric heating kiln, and heating for 2-3 hours at the temperature of 150-200 DEG C to obtain a green anode carbon block; then putting the green anode carbon block into a roasting furnace for roasting, and raising the temperature of a flame path in the roasting furnace to 200 DEG C from the normal temperature at a heating rate of 3-4 DEG C / H; raising the temperature to 1100 DEG C from 200 DEG C at a heating rate of 8-10 DEG C / H; and keeping the temperature at 1100 DEG C for 48 hours to enable the anode temperature to uniformly reach 950-1000 DEG C, thereby obtaining a mature anode carbon block. The method is environment-friendly and low in use cost.

Description

technical field [0001] The invention relates to the technical field of the carbon industry, in particular to a production method of a novel environmentally friendly anode carbon block. Background technique [0002] The anode carbon block used in the electrolytic aluminum industry is used for electrolytic alumina and is an important raw material in the electrolytic alumina industry; the traditional anode carbon block production is to use dry material and binder pitch to combine, asphalt as a binder, will A large amount of asphalt smoke is produced, and environmental protection facilities such as an electric tar catcher are required, and the on-site operating environment is poor; and the dry material needs to be preheated before kneading, and a high-temperature heat transfer oil system is required, which poses a major safety hazard; the temperature of the paste after kneading is 160±5°C, a cooling system is required to produce asphalt fume containing water and gas, which is po...

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Problems solved by technology

[0002] The anode carbon block used in the electrolytic aluminum industry is used for electrolytic alumina and is an important raw material in the electrolytic alumina industry; the traditional anode carbon block production is to use dry material and binder pitch to combine, asphalt as a binder, will A large amount of asphalt smoke is produced, and environmental protection facilities such as an electric tar catcher are required, and the on-site operating environment is poor; and the dry material needs to be preheated before kneading, and a high-temperature heat transfer oil system is required, which poses a major safety hazard; the temperature of the paste after kneading is 160±5°C, a cooling system is required to produce asphalt fume containing water and gas, which is poor in environmental protection; the temperature of raw block production is 145±5°C, and a cooling water pool is required for about 3 hours of cooling to produce oily waste water; asphalt is generated during roasting The flue gas needs to be equipped with electricity and other environmental protection facilities such as an electric tar catcher. The on-site operating environment is poor and the environmental protection cost is high; the roasting curve is formulated according to the coking characteristics of the asphalt. The temperature is 1050-1080°C, the roasting cycle is longer, and the commonly used ones are 180h and 216h roasting curves, and the output of the system is low; there are different degrees of bonding fillers in the roasted cooked blocks, and a carbon block cleaning machine system is required. In addition, due to the sticking problem , the filling material can only choose calcined coke and metallurgical coke, which do not affect the quality of the carbon block, and the cost is high; there is a certain slag drop rate, which affects the operation stability of the electrolytic cell and increases the labor intensity of employees

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