Method for short-term production of isotropic superfine structure isostatic pressing formed graphite

Abstract

The invention relates to a method for short-term production of isotropic superfine structure isostatic pressing formed graphite. The method comprises the following steps: crushing mixed coke, performing primary powder milling, blending materials, melting asphalt, kneading and cooling, performing secondary powder milling, bagging and vacuuming, performing isostatic pressing formation, performing primary roasting, performing high-pressure soaking, performing secondary roasting, and performing graphitization, wherein the step of melting asphalt refers to that high-temperature modified asphalt is adopted as an adhesive. The preparation procedures of the method are greatly shortened, the production period is shortened by 90 days when being compared with that of a conventional domestic production procedure, and a short-term process is achieved. Unique positive pressure roasting of a bogie hearth furnace is adopted for the primary roasting, the temperature uniformity of the positive pressure roasting is greatly improved when being compared with that of conventional negative pressure roasting of an annular furnace, the pass percentage of the primary roasting is as high as 99.5%, and meanwhile the yield of the primary roasting is up to 94% or greater.

Description

Technical field [0001] The invention creates a technology for manufacturing isostatic ultrafine structure isostatic graphite of a new type of special graphite material, and is a method for producing isostatic ultrafine structure isostatic graphite in a short process. Background technique [0002] With the rapid development of nuclear power, photovoltaics, optical fiber manufacturing, semiconductor manufacturing, rocket and missile launching, EDM and other fields, the demand for special graphite-isostatic graphite with isotropic ultrafine structure is increasing, especially It is the high-end ultra-fine structure isostatic graphite that all relies on imports. The reason is that the raw materials, process technology and equipment systemization technology have not broken through. Among them, the raw materials and stand-alone equipment can also be imported from abroad at a high price, but the manufacturing process is used by foreign carbon giants. Seal the lock tightly. Domestic man...

AI Technical Summary

Problems solved by technology

Domestically produced 8μm EDM graphite has an isotropy of 1.15--1.25, a flexural strength of 45--53MPa, a compressive strength of 98--108MPa, a Shore hardness of 53-62, and a resistivity of 13-14μΩm , high discharge consumption, low processing finish, not suitable for ultra-fine finishing processing

Domestically manufactured products have high costs due to multiple processes and long cycle times, and low pass rates, making them uncompetitive

Images