Large-size isostatic pressing graphite cylinder material and preparation method thereof: Fid-Bau Portal

Large-size isostatic pressing graphite cylinder material and preparation method thereof

ZHU GANG / ZHU RUIJIE / GAO YIN / HE WEIDAN / LI HUI / ZHANG YANYAN

The invention relates to a large-size isostatic pressing graphite cylinder material and a preparation method thereof. The large-size isostatic pressing graphite cylinder material comprises the following raw materials in parts by weight: 50-80 parts of secondary coke, 30-60 parts of a binder and 0-10 parts of high-purity crystalline flake graphite powder. After secondary coke and high-purity crystalline flake graphite powder are mixed, a binder optimized by raw materials is added for mixing and kneading, then a product is cooled, granulated, ground and put into a rubber sleeve of a special structure, and the rubber sleeve can guarantee that isostatic pressure in the inner direction and the outer direction is borne in the subsequent isostatic pressing forming process, so that the quality of the product is improved. According to the preparation method, the isostatic pressing graphite is added, so that the internal and external uniformity of the isostatic pressing graphite is improved, the product quality is improved, and finally, the structural compactness, uniformity, volume density, mechanical strength and isotropy are improved on the basis that an isostatic pressing graphite cylinder material with a larger size is obtained by using an optimized roasting and graphitizing process.

本发明涉及一种大规格等静压石墨筒料及其制备方法，其原料为二次焦50‑80份、粘结剂30‑60份、高纯鳞片石墨粉0‑10重量份。通过将二次焦与高纯鳞片石墨粉混合后，加入经过原材料优化的粘结剂进行混捏，再将产物经过冷却造粒后研磨，置入特殊结构的橡胶套中，该橡胶套可以保证后续等静压成型过程中，受到内外两个方向的等静压力，从而提高等静压石墨内外均匀性，提高产品质量，最后通过使用优化的焙烧与石墨化工艺，得到了尺寸更大的等静压石墨筒料的基础上，还使结构致密、均匀性、体积密度、机械强度、各向同性度得到提高。

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