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Petroleum coke fine powder coke forming process

A molding process and technology of petroleum coke, which is applied in the preparation/purification of carbon, etc., can solve the problems of increasing the amount of fine powder coke and biomass waste oil, and achieve the problem of solving subsequent processing problems, reducing time consumption and increasing the actual yield. Effect

Pending Publication Date: 2022-05-17
GUIYANG AL-MG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new fine powder coke molding process to solve the anode production problem caused by the increase in the amount of fine powder coke in view of the huge impact of the fine powder coke of the anode raw material petroleum coke for aluminum electrolysis on the anode production and the follow-up treatment problems caused by waste biomass oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 100g of petroleum coke fine powder coke (particle size<1mm) and 3.1g of molding agent (biomass waste oil), and fully mix with a stirring mixer at normal temperature to obtain the material to be molded;

[0026] (2) Place the material to be molded in a twin-screw extrusion granulator, and obtain a columnar pellet with a diameter of Φ2 mm and a length of 5 mm under an extrusion pressure of 10 MPa;

[0027] (3) Put the shaped pellets into a sintering furnace and heat them up to 200°C at a heating rate of 20°C / min, keep the temperature for 1 hour, and cool down naturally to obtain finished pellets.

Embodiment 2

[0029] (1) Weigh 100g of petroleum coke fine powder coke (particle size<1mm) and 13.5g of molding agent (biomass waste oil), fully mix with a stirring mixer at normal temperature, and obtain the material to be molded;

[0030] (2) Place the material to be molded in a twin-screw extrusion granulator, and obtain a diameter of Φ15mm and a columnar pellet with a length of 15mm under an extrusion pressure of 30MPa;

[0031] (3) Put the shaped pellets into a sintering furnace and heat them up to 300°C at a heating rate of 30°C / min, keep them warm for 0.5h, and cool down naturally to obtain finished pellets.

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Abstract

The invention discloses a forming process of petroleum coke fine powder coke. The forming process comprises the following steps: taking fine powder coke which is screened from raw materials and has the moisture content of less than 10wt% as a forming raw material; biomass waste oil obtained by simply refining kitchen waste oil is adopted as a forming agent; mixing the fine coke powder with the biomass waste oil; after uniformly mixing, carrying out normal-temperature extrusion forming on the mixture through an extrusion forming machine to obtain columnar granules with the diameter of 2-15mm and the length of 5-15mm; the formed granules are placed in a sintering furnace to be dried and sintered, the sintering finishing temperature is 200-300 DEG C, the heating rate is 20-30 DEG C / min, and high-temperature heat preservation is conducted for 0.5-1 h; mixing the molded granules subjected to heating treatment into the screened petroleum coke granules, and carrying out a petroleum coke calcining process; and finally calcining to obtain finished product particles. The casting yield of the petroleum coke is increased, the production quality of the anode is guaranteed, and the problem that the anode raw material formula is limited by the fine coke powder amount is solved.

Description

technical field [0001] The invention relates to the problem of raw material preparation in the production process of carbon materials used in the aluminum electrolysis industry, in particular to a molding process of petroleum coke fine powder coke. Background technique [0002] Petroleum coke is the primary raw material of prebaked anodes, the "heart" of the aluminum electrolysis industry, and its quality has a crucial impact on the tank performance and practical life of prebaked anodes. [0003] In recent years, due to the change of petroleum refining process (transformation of kettle coking to delayed coking), the efficiency of petroleum refining has been greatly improved, but the proportion of the refined product - petroleum coke fine powder coke has increased. An increase in the amount of fine powder coke will lead to an imbalance in the formula in the production of prebaked anodes (from the previous large particle formula 12, 6, 3 to small particle formula 6, 3, 1), and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C25C3/12
CPCC01B32/05C25C3/125
Inventor 杨运川邓翔张嘉闫朝宁
Owner GUIYANG AL-MG DESIGN & RES INST
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