【作者】 钱玉鹏；

【导师】 朱瀛波；

【作者基本信息】 武汉理工大学 ， 矿物加工工程， 2009， 硕士

【摘要】 长期以来,云母深加工制品是云母应用的主要途径,但云母深加工仍然存在一定的问题,在云母纸方面,传统的粉碎设备无法保证粉碎后云母晶型,而正在使用的水力制浆机装置是引进日本70年代的技术,处理量低下,同时还存在产品粒度不稳定,石英掺杂等问题;而在云母粉方面,特别是高档云母粉领域,产品的粒度不均匀,径厚比不大,表面形态不完整等问题制约着我国云母工业的发展。针对这一现状,本论文主要是利用自主研制的高、低压两台水射流磨进行云母粉碎实验研究,以期解决云母粉碎工艺存在的问题,分析各因素对云母粉碎效果的影响,从而获得较为合理的水射流磨工作参数,以此改善云母粉碎工艺,提升云母深加工行业水平。通过WJM-A型低压水射流实验研究,确定其为云母原矿粗碎设备,其主要用于造纸云母浆料的生产,其考察指标为粉碎后大于0.15mm（100目）云母粉累积含量和小于0.15mm云母粉的平均粒径,选择使用扇形喷嘴,控制射流水压6MP,侧面补充水26.7 L·min^-1,底部补充水8.0 L·min^-1时处理量可达60kg/h,粉碎后云母粉浆料0.15mm以上含量可达82.36%,0.15mm以下云母粉平均粒径d₅₀=137.58μm,利用此浆料在纸样抄取器上进行造纸试验,纸张抗张强度达到2.018N/cm,击穿强度达到18.41KV/mm,与工业现场浆料造纸对比发现,纸张强度提高了近7倍,击穿电压提高了59.3%,大大提升浆料质量。通过HWJM-A型高压水射流磨实验研究,确定其为云母超细粉碎设备,主要用于生产高档湿磨云母粉,其考察指标为粉碎后20～50μm云母粉百分含量和20～30μm云母粉的径厚比,利用正交实验获得了较好的工作参数:3#喷嘴,孔径2.60mm,处理量5kg/h,射流水压20MPa,冲击距离18mm,粉碎后云母粉20～50μm含量可达58.91%,20～30μm云母粉径厚比可达118.43。水射流磨有效的解决了云母粉碎工艺存在的问题,得到了较为合理的云母纸、云母粉深加工工艺参数,具有一定的工业推广意义。更多还原

【Abstract】 The main way application of mica is further processing products. For now, there are still lots of problems in mica further processing. In mica paper, traditional comminuting equipment often destroy the crystal of mica, the water pulping machine installations which still been used is introduced of Japan’s 70th technology, with the issues of low capacity, particle size instability and quartz mixing; for mica powder, especially in the field of high-grade mica powder, the product with non-uniform particle size, low diameter-thickness ratio and incomplete Surface morphology are the problems restricting the development of our mica industries.In response to this situation, we have self-researched two water-jet mills with the support of the "11^th·5" national scientific and technological plan, one with high pressure, the other with low pressure. This paper is studying on the effect of comminuting mica with the water-jet mill, and obtains a more reasonable water-jet mill operating parameters to enhance the level of mica processing industries.By the research of the WJM-A low-pressure water-jet mill, we found it is better for produce the mica paper pulp, and the index is above 0.15mm accumulation and below 0.15mm d₅₀. The best operating parameters is choose the fan-shaped nozzle, control the jet pressure 6MPa, side added water 26.7 L·min^-1, bottom added water 8.0 L·min^-1 and the deal capacity 60kg/h, the above 0.15mm accumulation will up to 82.36% and the below 0.15mm d₅₀=137.58μm. Take this mica pulp to produce the mica paper with the experimental paper device, tensile strength reached 2.018N/cm, breakdown strength reached 18.41KV/mm, compared with the industrial-site pulp, paper strength increased by nearly 7 times the breakdown voltage was increased by 59.3%, significantly enhance the quality of the pulp.By the research of the HWJM-A high-pressure water-jet mill, it is better for superfine mica, the index is the percentage content of 20～50μm and the diameter-thickness ratio of 20～30μm. The best operating parameters is 3^rd nozzle with the aperture of 2.60mm, the deal capacity 5kg/h, the water-jet pressure 20MPa, the impact of distance 18mm. Under this situation, the comminuted mica 20～50μm percentage content will up to 58.91%, and the diameter-thickness ratio will be 118.43.After a series research, we obtain a useful operating parameters for the mica comminuting, and the data has a certain significance of industrial promotion.更多还原