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Production method of novel environment-friendly anode carbon block

A technology of anode carbon block and production method, applied in the field of carbon industry, can solve the problems affecting the operation stability of electrolyzers, increase the labor intensity of employees, poor working environment, etc., so as to reduce the labor intensity of employees, reduce the labor intensity of employees, and reduce the cost. Effect

Pending Publication Date: 2021-11-05
河南中孚铝业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Production method of novel environment-friendly anode carbon block
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  • Production method of novel environment-friendly anode carbon block

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1, the total amount of material is 100000kg, according to the dry material accounted for 88%, lignin modified phenolic resin accounted for 12% formula, dry material includes calcined coke, residual pole and waste cathode carbon block; calcined coke medium particle size Coarse coke with a particle size of 6-12mm accounts for 7% of the total dry material weight, medium coke with a particle size of 3-6mm accounts for 19% of the total dry material weight, and fine coke with a particle size of 0-3mm accounts for 22% of the total dry material weight. Coke powder with particle size less than or equal to 0.8mm accounts for 28% of the total dry material weight; coarse residue with a particle size of 3-6mm accounts for 10% of the total dry material weight, and fine residue with a particle size of 0-3mm accounts for the total dry material weight 10% of 10%; spent cathode carbon blocks with a particle size of 0-3mm account for 4% of the total dry material weight, that is,...

Embodiment 2

[0030]Embodiment 2. The total amount of material is 100000kg. According to the formula that dry material accounts for 90% and pitch modified phenolic resin accounts for 10%, dry material includes calcined coke, residual pole and raw crushed; the particle size of calcined coke is 6- 12mm coarse coke accounts for 8% of the total dry material weight, medium coke with a particle size of 3-6mm accounts for 20% of the total dry material weight, fine coke with a particle size of 0-3mm accounts for 23% of the total dry material weight, and the particle size is less than or equal to Powder coke with a particle size of 0.8mm accounts for 28% of the total dry material weight; the coarse residue with a particle size of 3-6mm accounts for 8% of the total dry material weight, and the fine residue with a particle size of 0-3mm accounts for 10% of the total dry material weight ;Raw coke with a particle size of 0-3mm accounts for 3% of the total dry material weight, that is, weigh 7040kg of coa...

Embodiment 3

[0032] Embodiment 3, the total amount of material is 100000kg, accounts for 92% according to dry material, cardanol modified phenolic resin accounts for 8% formula, and dry material comprises calcined coke, residual pole and waste cathode carbon block; The particle size in calcined coke is 6 Coarse coke with a particle size of -12mm accounts for 11% of the total dry material weight, medium coke with a particle size of 3-6mm accounts for 20% of the total dry material weight, and fine coke with a particle size of 0-3mm accounts for 22% of the total dry material weight. The powder coke equal to 0.8mm accounts for 28% of the total dry material weight; the coarse residue with a particle size of 3-6mm accounts for 7% of the total dry material weight, and the fine residue with a particle size of 0-3mm accounts for 7% of the total dry material weight. %; The spent cathode carbon block with a particle size of 0-3mm accounts for 5% of the total dry material weight, that is, weigh 9680kg ...

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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...

Claims

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Application Information

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IPC IPC(8): C04B35/532C04B35/622C25C3/12
CPCC04B35/532C04B35/62204C25C3/125C04B2235/96C04B2235/6562C04B2235/6567
Inventor 覃海棠魏国阳夏训松黄智新翟红卫张晓辉
Owner 河南中孚铝业有限公司
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