SU990880A1 - Bottom composition for aluminium electrolyzers - Google Patents

Description

Catalyst I polymerization and polycondensation of carbonaceous waters with the following ratio of 1 component, wt.% t Solvent - anthracene fraction | 7-9 Binder - coal tar 7-9 Catalyst of polymerization of hydrocarbons 0.05-15.0 Carbon seech Remaining B As a catalyst for the condensation and polymerization of hydrocarbons, it contains carbon black with an amount of S-15 weight or iron with | organic acid (for example, pearate or iron benzoate :) in an amount of 0.15-0.1 wt.% or 5% chlorine. -10 wt.%. as a carbon charge (filler), the mass contains,%: thermoanthracite 42%; foundry coke - the rest; graphite return 4; coal return 13. The catalysts of the condensation process and polymerization increase the yield of coke from the pitch, involve the solvent in the coking process, increase the mechanical strength of the coke from the pitch, reduce the porosity and shrinkage of the sintered interlock block. To obtain the mass, several compositions have been prepared, containing each and every one of the components of the carbon filler and differing from each other in the content of the catalyst for the polymerization of hydrocarbons. The compositions are given in table. one.

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The powdered carbon mixture is loaded into a periolic mixer, molten binder (a mixture of coal tar pitch and anthracene fraction in a 1: 1 ratio) is added and stirred for 40 minutes.

From tab. 2, it follows that the introduction of catalysts of the precursors into the hearth mass significantly reduces porosity and shrinkage in the sintered form,

In addition, with the introduction of catalysis, the tori are significant, but other quality indicators of the furnace bottom mass are also improved, which gives an annual economic effect on 1 electrolyte. Prepared batches of bottom mass in a cold state are stuffed into the casing, burned in accordance with TU-48-12-25 -74 and determine the porosity and shrinkage. The results of the study of the bottom mass are given .. in table. 2

table 2

grain in the operation and overhaul of about 2000 rubles.

Claims (4)

1. Bottom mass for aluminum electrolytic cells containing carbon charge, coal tar pitch and 65 dissolve, characterized in that, in order to improve the quality of the bottom welds, it additionally contains a catalyst for the polymerization and tt-condensation of hydrocarbons, and the anthracene fraction in the following is the solvent the ratio of components, wt.%: Coal pitch 7-9 Anthracene fraction 7-9 Catalyst for polymerization and polycondensation of hydrocarbons 0.05-15.0 Carbon blend Rest 2. A mass according to claim 1, characterized in that it contains carbon black in an amount of 5 to 15 wt.% As a catalyst for the polymerization and polycondensation of hydrocarbons. 3. The mass according to claim 1, characterized in that as a catalyst for the polymerization and polycondensation of hydrocarbons it contains the iron salt of an organic acid, preferably stearate or iron benzoate in an amount of 0.10-0, IS by weight. 4. A mass according to claim 1, characterized in that it contains aluminum chloride in an amount of 510 wt.% As a katapi of a mash of polymerization and polycondensation of hydrocarbons. SOURCES of information taken in. examination at examination 1. A.A. Kostyukov. A Reference Manual of a Metallurgist on Nonferrous Metals. Production Atamin, M., Metallurgists, 1971, p. 241-242. 2. For Germany FRG 2509550, cl. C 25 C 3/08, published. 1980