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Raw anode formula experiment method for increasing volume density of raw anode
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A technology of volume density and experimental method, which is applied in the experimental field of raw anode formulations to increase the volume density of green anodes, can solve the problems of reducing the volume density of green anodes and destroying the most closely packed state, and achieve the effect of increasing the volume density of green anodes
Inactive Publication Date: 2014-05-28
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology
When the above method is used to produce anodes, after dry mixing evenly, the dry material is in the most tightly packed state. After adding asphalt and kneading and forming, according to the rubber material theory, it can be known that the asphalt is wrapped on the surface of the powder material to form an asphalt layer. The total volume of the rubber material is greater than The volume of the powder, thus destroying the most compact packing state, reduces the bulk density of the green anode to a certain extent
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Embodiment 1
[0012] Using a certain kind of calcined coke, by measuring the tap density of the mixed dry material, the formula of the dry material at the maximum tap density is obtained, and the amount of powder in the formula is 40%. On the basis of the formula, reduce the amount of powder by 0.1%, 3%, 6%, 9%, and 12% (the percentage of powder in the total weight of the dry material) to obtain formulas 1, 2, 3, 4, and 5, respectively. Formulas 1, 2, 3, 4, and 5 were used as ingredients, and 16%, 15.4%, 14.8%, 14.2%, and 13.6% of asphalt were added and kneaded evenly, and then molded under the same conditions. After molding, the bulk density of the green anode was measured. The formula 1, 2, 3, 4, and 5 correspond to a green bulk density of 1.62g cm -3 , 1.64g·cm -3 , 1.67g·cm -3 , 1.62g·cm -3 , 1.57g·cm -3 , so formula 3 is a better formula.
Embodiment 2
[0014] Using a certain kind of calcined coke, by measuring the tapped bulk density of the mixed dry material, the dry material formula at the maximum tapped bulk density is obtained, and the powder content in the formula is 33%. On the basis of the formula, reduce the amount of powder by 0.1%, 3%, 6%, 9%, and 12% (the percentage of powder in the total weight of the dry material) to obtain formulas 1, 2, 3, 4, and 5, respectively. Formulas 1, 2, 3, 4, and 5 were used as ingredients, and 14.4%, 13.8%, 13.2%, 12.6%, and 12% asphalt were added and kneaded evenly, and then molded under the same conditions. After molding, the green anode volume density was measured. The formula 1, 2, 3, 4, and 5 correspond to a green bulk density of 1.62g cm -3 , 1.64g·cm -3 , 1.66g·cm -3 , 1.63g·cm -3 , 1.58g·cm -3 , so formula 3 is a better formula.
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Abstract
A raw anode formula experiment method for increasing the volume density of a raw anode relates to a method for increasing the volume density of the raw anode and determining the best formula for the raw anode. The method is characterized in that a method of measuring the compaction bulk density of a uniformly blended dry material is firstly adopted to obtain a dry material formula with the highest compaction bulk density, the amount of powder is reduced on the basis of the formula, that is, the powder accounts for 0.1%-12% of the total weight of the dry material, then a plurality of formulas are obtained, 12%-16% of pitch is added into the material of each of the formulas and is uniformly blended and pinched, the mixture is formed under the same condition, the volume density of the raw anode is measured after forming, and the formula X with the highest volume density of the raw anode is the formula capable of effectively increasing the volume density of the raw anode. According to the experiment method provided by the invention, the formula with the highest volume density of the raw anode is chosen from the plurality of formulas, and a guarantee is provided for effectively increasing the volume density of the raw anode.
Description
technical field [0001] The invention discloses an experimental method of green anode formulation for increasing the volume density of the green anode, relating to a method for determining the best formulation of the green anode for increasing the volume density of the green anode. Background technique [0002] In the production process of aluminum electrolytic anodes, increasing the volume density of raw anodes helps to increase the volume density of anode cooked blocks, thereby increasing its strength, reducing resistivity, reducing air permeability, and improving air and CO 2 Therefore, it is of great significance to increase the volume density of the green body to increase the rate of qualified and first-class anode products, reduce the consumption of anodes, and reduce the energy consumption of aluminum electrolysis. [0003] At present, it is mainly through adjusting the dry material formula, increasing the amount of asphalt added, and improving the molding conditions t...
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