磷钨酸提纯天然鳞片石墨初稿.docVIP

摘 要 从设备、工艺技术上不是很成熟，钨酸、酸性弱于氢氟酸的强酸，了这与以质量比均匀搅拌.5h为较佳工艺条件将%的高碳石墨提纯到%的高纯石墨关键词：石墨；；钨酸Abstract Along with the development of science and technology, natural flake graphite is widely used in many fields such as chemical, mechanical, metallurgical, graphite products and its composite materials is more widely applied. In particular, the high requirement of graphite products and its composite material to the purity of graphite, carbon content above 99% mostly. Flotation method, though simple process and low cost, far short of taste requirements. Alkali acid and hydrofluoric acid and so on several commonly used ones are of high purity graphite production methods is not very mature from the equipment and process technology, so it is necessary for high purity graphite to study the preparation technology, safe and efficient green preparation of graphite materials. Tungsten acid , phosphotungstic acid and phosphorus is slightly weak acidic molybdate in hydrofluoric acid, non-toxic, corrosive small, the experiment respectively studied the several acid purified natural flake graphite, phosphotungstic acid at 90 ℃ and graphite to mass ratio of 1:1 mixed evenly mixing 3.5 h for better process conditions, high carbon graphite purification can be 97.28% to 99.05% of high purity graphite. In to solve the problems of the purity of graphite, and reduce the pollution to the environment and hurt human body, leading the graphite industry healthy and orderly and sustainable development. Keywords：Natural Flake Graphite, Purification, Tungsten Acid, Phosphotungstic Acid, Phosphomolybdic Acid 目 录 摘 要..……………………………………………………………….I Abstract………….………………………………………..………....II 第1章 绪论………………………………….…………...………….1 1.1石墨的晶体结构、性质与用途 2 1.1.1石墨的晶体结构 2 1.1.2石墨的工业分类 3 1.1.3石墨的性能特点 5 1.1.4石墨的应用 6 1.2石墨提纯工艺研究现状 6 1.2.1 浮选法 7 1.2.2 碱酸法 7 1.2.3 氢氟酸法 8 1.2.4 氯化焙烧法 9 1.2.5 高温法 9 1.3 天然鳞片石墨发展前景 10 1.4 实验目的及内容 10 1.4.1 实验目的及意义 10 1.4.2 实验内容 10 第2章 实验方法及材料……………………………………………11 2.1实验仪器及药品 11 2.1.1 实验仪器 11 2.1.2 实验药品