Manufacturing method of once-formed graphite crucible

Abstract

The invention relates to a manufacturing method of a once-formed graphite crucible. The manufacturing method is characterized by comprising the following steps: (1) batching: preparing the following components in percentage by mass: 70%-90% grinding powder prepared by grinding graphite scrap and 10%-30% of medium temperature coal pitch; (2) mixing kneading; (3) compression; (4) roasting; and (5) processing. The major material adopted in the manufacturing method is the graphite scrap which is waste obtained during the production of an electrode, so that the waste reutilization is realized, the average cost of each same-scale product is lowered by 800-1000 yuan, the energy source is saved, the environment is protected, and meanwhile, the manufacturing cost of the graphite crucible is lowered. Compared with a graphite crucible produced from a traditional graphite electrode, two procedures of impregnation and graphitization in which the environmental pollution may be caused and the energy sources are greatly consumed are reduced; and compared with a graphite electrode crucible, the average production cycle is shortened by 30-40 days, the energy conservation and emission reduction are achieved, and the production efficiency is greatly improved. According to the graphite crucible produced by virtue of the technical scheme, the longitudinal layout of aggregate particles is avoided, the structure of a product is isotropic, an anti-seepage effect is achieved, and the smelting use requirements of heavy and noble metals are well met.

Description

technical field [0001] The invention belongs to the technical field of graphite crucible manufacture, and in particular relates to a graphite crucible manufacturing method for one-time molding by regenerated graphite. Background technique [0002] Due to the high temperature resistance, oxidation resistance and stable chemical properties of graphite, the crucible container made of graphite is widely used in the purification of lithium battery negative electrode powder, rare earth smelting, precious metal smelting and other industries that require high temperature heat treatment. [0003] At present, the way to manufacture graphite crucibles is usually to use high-quality graphite electrode blanks through machining. There are following problems in graphite electrode processing production crucible method: [0004] 1. The crucible processed with artificial graphite electrodes needs to cut off the core of the electrode, and the yield is only 20-30%. The material waste is huge a...

AI Technical Summary

Problems solved by technology

[0004] 1. The crucible processed with artificial graphite electrodes needs to cut off the core of the electrode, and the yield is only 20-30%. The material waste is huge and the production cost is high, which is not conducive to the large-scale use of crucible downstream enterprises

[0005] 2. Restricted by the electrode forming method and formula, the product structure of the crucible processed with artificial graphite electrodes is anisotropic, with defects in physical indicators and unstable quality

Especially when used for precious metal smelting, the crucible leaks seriously and often cannot meet the requirements of use.

[0006] 3. The production of graphite electrodes requires coal-based or petroleum-based calcined coke, and the manufacturing process of these cokes pollutes the environment and also has high costs. The graphitization process consumes about 6000kw.h of electricity per ton, resources and energy Serious waste

[0007] 4. The graphite electrode production method has a long manufacturing cycle and low production efficiency, which cannot meet the needs of users