Medium-grained carbon anode matched with 300KA aluminum electrolyzer

Abstract

The present invention relates to a carbon anode processing method, in particular to a medium-grained carbon anode matched with a 300KA aluminum electrolyzer, which solves the problem that the prior art for manufacturing carbon anodes matched with aluminum electrolyzers is low in gas reactivity, high in the air permeability of the carbon anodes produced through small-particle formulation, high in the unit consumption of primary aluminum anodes, and the like. The preparation method comprises raw material crushing, screening, proportioning, mixing-kneading, molding and roasting, and is characterized in that raw materials are 59 to 84 percent of screened calcined coke, 0 to 25 percent of residual pole pieces and 14 to 18 percent of coal tar pitch; the range of the particle size of the raw materials at each level in the formulation is 8 to 0 mm; the purity of the raw materials in each grain size is required to be between 50 and 100 percent; the mixing-kneading temperature is 135 to 185 DEG C; the molding temperature is 120 to 160 DEG C; and the roasting temperature is 1,050 to 1,300 DEG C. The method can reduce anode consumption by 10 kg / t-Al and then can reduce the production cost of primary aluminum.

Description

technical field [0001] The invention relates to a carbon anode processing method, in particular to a medium-sized carbon anode matched with a 300KA aluminum electrolytic cell. Background technique [0002] With the development of electrolytic cells towards large capacity and automation, the 300KA aluminum electrolytic cell has gradually become the preferred cell type for the replacement of domestic electrolytic aluminum enterprises. However, the production formula of the matching carbon anode still follows the traditional Large particle formula (15-0mm or 12-0mm or 10-0mm) or small particle formula (6-0mm or 4-0mm). The carbon anode produced by the large particle formula has low volume density, carbon dioxide reactivity and air reactivity, and the carbon anode produced by the small particle formula has high air permeability and high consumption of primary aluminum per unit anode. Therefore, in terms of the selection of carbon anode formulations, emphasis is placed on introd...

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Problems solved by technology

[0003] The present invention provides a 300KA aluminum electrolytic cell in order to solve the problems of low gas reactivity, high air permeability of carbon anode produced by small particle formula and high anode consumption per unit of raw aluminum in the existing technology of manufacturing aluminum electrolytic cell supporting carbon anode. Medium-sized carbon anode for the tank