Manufacturing method of once-formed graphite crucible

The technology of a graphite crucible and a manufacturing method, which is applied in the field of graphite crucible manufacturing, can solve the problems of high cost, large waste of materials, low production efficiency, etc., and achieve the effects of reducing the manufacturing cost, meeting the requirements for use, and improving the production efficiency.

Inactive Publication Date: 2017-09-08
吉林科工碳业有限公司
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 meta

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] The manufacturing method of the disposable graphite crucible of the present invention includes the following steps:

[0031] a. Raw material preparation: broken graphite, true density 2.13g / cm 3 , Ash content 0.03%, volatile matter 0.22%, moisture 0.09%; medium temperature coal pitch, ash content 0.20%, volatile matter 64.2%, moisture 0.06%;

[0032] b. Ingredients: Use a ball mill to grind graphite into graphite powder, the mass percentage is 80%, and the purity is 80% when sieved with a 200-mesh international standard sieve;

[0033] The mass percentage of medium temperature coal pitch is 20%;

[0034] The composition of graphite powder particle size and mass percentage is as follows:

[0035] 3% graphite powder with 1mm particle size;

[0036] 0.5-0.15 grain size graphite powder 39%;

[0037] -40% graphite powder with a particle size of 0.075;

[0038] Graphite powder of other particle size is 18%.

[0039] C. Kneading: Pour the graded ingredients into the kneadi...

Example Embodiment

[0043] Example 2

[0044] The manufacturing method of the disposable graphite crucible of the present invention includes the following steps:

[0045] a. Raw material preparation: broken graphite, true density: 2.14g / cm 3 , Ash content: 0.03%, volatile matter: 0.21%, moisture: 0.07%; medium temperature coal pitch, ash content: 0.19%, volatile matter: 63.2%, moisture: 0.05%;

[0046] b. Ingredients: Use a ball mill to grind graphite into graphite powder with a mass percentage of 90%. The purity of the graphite powder is 85% through a 200-mesh international standard sieve;

[0047] The mass percentage of medium temperature coal tar pitch is 10%;

[0048] The composition of the graphite powder particle size and mass percentage is as follows:

[0049] 1mm graphite powder 2%;

[0050] 37% graphite powder with 0.5-0.15 granularity;

[0051] -38% of graphite powder with a particle size of 0.075;

[0052] 23% graphite powder of other particle size;

[0053] C. Kneading: Pour the graded ingredients i...

Example Embodiment

[0057] Example 3

[0058] The manufacturing method of the disposable graphite crucible of the present invention includes the following steps:

[0059] a. Raw material preparation: broken graphite, density: 2.14g / cm 3 , Ash content: 0.03%, volatile matter: 0.20%, moisture: 0.07%; medium temperature coal pitch, ash content: 0.19%, volatile matter: 63.5%, moisture: 0.04%;

[0060] b. Ingredients: Use a ball mill to grind graphite into graphite powder, with a mass percentage of 70%. The purity of the graphite powder is 75% through a 200-mesh international standard sieve;

[0061] The mass percentage of medium temperature coal tar pitch is 30%;

[0062] The composition of the graphite powder particle size and mass percentage is as follows:

[0063] 1mm graphite powder 4%;

[0064] 42% graphite powder of 0.5-0.15 granularity;

[0065] -37% graphite powder with a particle size of 0.075;

[0066] 17% of graphite powder of other particle size;

[0067] C. Kneading: Pour the graded ingredients into th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
True densityaaaaaaaaaa
True densityaaaaaaaaaa
Densityaaaaaaaaaa
Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B35/532C04B35/622
CPCC04B35/522C04B35/532C04B35/622C04B2235/6562C04B2235/6567
Inventor 李伟邱庭举
Owner 吉林科工碳业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap