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Process for preparing carbon forming powder

A molding powder and process technology, which is applied in the field of carbon molding powder preparation, achieves the effects of high airflow rotation speed and centrifugal force field strength, convenient fineness adjustment, and high powder selection efficiency.

Inactive Publication Date: 2011-02-16
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a preparation process of carbon molding powder, to solve the above-mentioned problems existing in the existing closed loop process, and effectively improve the prepared carbon molding powder The purity and stability of the system, improve the grinding efficiency and output of the system, reduce the power consumption per unit of product, and eliminate the dust pollution in the production workshop, significantly improve its working environment, optimize and simplify the system process flow, enhance the controllability of product fineness, and use Its operation is more convenient and stable

Method used

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  • Process for preparing carbon forming powder

Examples

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Effect test

Embodiment 1

[0041] Example 1 Double fan closed-circuit circulation process transformation

[0042] The invented process is applied to the transformation of the pulverizing system of Luoyang Longquan Tiansong Carbon Co., Ltd. with double blower closed-circuit circulation process. The whole system is an open-circuit system operating at -5860Pa. The raw materials are waste anodes and carbon petroleum coke. The rotor speed (223r / min) of the high-efficiency rotor classifier (NHMF-200) is adjusted, and the air box pulse bag filter ( Model LPM2×5C-920), main exhaust fan (model XY6B-SM1600D, air volume: 48000~63900m3 / h). Effects of the process transformation: 1. The output of the system is greatly improved. The current output of the system is 12t / h. After the transformation, the output of the system is increased by 20% while ensuring the original control fineness (the quality of <80μm is 80%), reaching the original design requirement of 10~12t / h. 2. The stability of the system ...

Embodiment 2

[0043] Embodiment 2 Process new project of the present invention

[0044] This invented process is applied to the newly-built project of grinding system in raw anode workshop of Shandong Nanshan Aluminum Industry Co., Ltd. The whole system is an open circuit system operating at -6500Pa, the raw material is carbon petroleum coke, the rotor speed (265r / min) of the high-efficiency rotor classifier (NHMF-240) is adjusted, and the air box pulse bag filter (model LPM2× 5C-920), main exhaust fan (model 7-29-11 №14.25D, air volume: 50000~70000m3 / h). After the project is completed, the output of the system will be 14t / h, meeting the original design requirement of 12~14t / h. The stability of the system is improved, and the uniformity of the finished powder is good. The average index (n) of its finished powder is 1.30. Adjusting the rotor speed of the high-efficiency rotor classifier through the stepless speed regulation of the frequency converter can easily adjust the finenes...

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Abstract

The invention relates to a process for preparing carbon forming powder, in particular to a new process for preparing carbon forming powder by adopting an air swept type ball milling system. In the invention, equipment mainly comprises a raw material bin, an air swept type ball mill, a high-efficiency rotor type grader, a gas tank pulse bag type dust collector, a main exhaust fan and a finished powder bin. In the main work process of the invention, a raw material is fed and added to the air swept type ball mill through a feeder and is subjected to rough and fine powder grading through the high-efficiency rotor type grader, rough particles are returned to the ball mill for pulverizing once again, and fine particles enter the gas tank pulse bag type dust collector for collection. The invention has the technological performance advantages of high systemic force supply, low power consumption for unit product, high finished powder purity, and good uniformity and stability, and completely eliminates the phenomena of air leakage and ash flying in the traditional process because of the operation in a negative pressure state. The process is not only suitable for the optimization and technological improvement on the traditional process in the production process of the carbon forming powder, but also suitable for new projects of a carbon forming powder preparation system.

Description

technical field [0001] The invention relates to a preparation process of carbon molding powder, in particular to a process for preparing carbon molding powder by adopting an air-swept ball mill system and a single blower airflow open circuit operation process. Background technique [0002] In the formula for producing carbon raw anode, the amount of carbon molding powder accounts for about 30% of the total dry powder, but its specific surface area accounts for more than 90% of the total specific surface area. Therefore, the purity and stability of carbon molding powder are the most important factors that affect the raw anode Key factor for paste and prebaked anode quality. However, in the current industrial production, due to the defects in the preparation process of carbon molding powder, the purity and stability of the prepared molding powder are poor, which in turn affects the quality of raw anode paste and prebaked anode. [0003] At present, the industrial preparatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C23/12C01B31/02B02C17/00
Inventor 方莹李镇张少明
Owner NANJING UNIV OF TECH
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