本文選題：片狀鋅粉 + 助磨劑�。� 參考：《華東理工大學(xué)》2014年碩士論文

【摘要】：在對(duì)現(xiàn)有攪拌磨機(jī)濕法制備納米片狀鋅粉的工藝進(jìn)行分析后,指出目前存在于該工藝中的兩大問(wèn)題：一是工藝的危險(xiǎn)性,即工藝中所選擇的助磨劑有毒、易燃、易爆,對(duì)人體、環(huán)境及生命安全存在著較大的危害；二是工藝優(yōu)化方法的問(wèn)題,由于國(guó)內(nèi)對(duì)攪拌磨機(jī)的研究較晚,目前沒(méi)有相應(yīng)的科學(xué)原則,在利用攪拌磨機(jī)生產(chǎn)片狀鋅粉時(shí),其工藝參數(shù)的選擇只能依賴于經(jīng)驗(yàn)法和試驗(yàn)法,一方面速度緩慢、浪費(fèi)人力物力,另一方面在磨機(jī)結(jié)構(gòu)變化時(shí),還需再次試驗(yàn),進(jìn)程緩慢。而后針對(duì)這兩個(gè)問(wèn)題逐個(gè)分析,提出解決方案,優(yōu)化工藝參數(shù),并通過(guò)試驗(yàn)以及與現(xiàn)有工藝的對(duì)比進(jìn)一步完善工藝。 研究表明：選用去離子水作為助磨劑不僅能解決目前工藝中存在的危險(xiǎn),而且去離子水具有較好的分散助磨作用,能預(yù)防制備過(guò)程中的團(tuán)聚現(xiàn)象,獲得粒徑符合國(guó)標(biāo)要求的片狀鋅粉；離散元分析軟件PFC3D能夠較好地仿真模擬攪拌磨機(jī)的運(yùn)動(dòng)狀態(tài),并將其筒體內(nèi)介質(zhì)的運(yùn)動(dòng)形態(tài)、速率分布等參數(shù)展現(xiàn)出來(lái),將工藝參數(shù)的變化和微觀力學(xué)參數(shù)聯(lián)系起來(lái),為工藝參數(shù)的選擇提供較好的理論支撐,解決了只能依靠經(jīng)驗(yàn)和試驗(yàn)法優(yōu)化工藝參數(shù)的問(wèn)題；將新工藝和現(xiàn)有工藝對(duì)比,新工藝在經(jīng)濟(jì)性、環(huán)保性、生產(chǎn)效率、工藝優(yōu)化方法及片狀化程度上均優(yōu)于現(xiàn)有工藝,唯一不足的是金屬鋅含量問(wèn)題；針對(duì)新工藝的缺陷,做了進(jìn)一步的完善,使得在最終工藝條件下制得的片狀鋅粉不僅滿足國(guó)標(biāo)要求,而且能媲美于德國(guó)愛(ài)卡鋅粉。 論文的研究解決了目前攪拌磨機(jī)濕法制備納米片狀工藝存在的問(wèn)題,并對(duì)現(xiàn)有工藝進(jìn)行了真正意義上的創(chuàng)新,創(chuàng)新后的工藝滿足“綠色環(huán)保,節(jié)能減排”的新型經(jīng)濟(jì)發(fā)展模式。同時(shí),論文針對(duì)攪拌磨機(jī)的研究現(xiàn)狀提出的PFC3D軟件工藝優(yōu)化方法同樣適用于攪拌磨機(jī)制備其他粉體行業(yè)。
[Abstract]:After analyzing the technology of preparing nano flake zinc powder by wet process of existing mixing mill, it points out two problems existing in the process: one is the danger of process, that is, the grinding agent selected in the process is poisonous, flammable and explosive, and it has great harm to the human body, environment and life safety; two is the question of process optimization. Because of the late research on stirred mill in China, there is no corresponding scientific principle at present. When using a mixing mill to produce flaky zinc powder, the selection of its technological parameters can only depend on the experience method and test method. On the one hand, the speed is slow and the manpower and material resources are wasted. On the other hand, when the mill structure changes, it needs to be tested again and the process is slow. After analyzing these two problems one by one, the solutions are put forward, the process parameters are optimized, and the process is further improved through experiments and comparison with existing technologies.
The study shows that the use of deionized water as a grinding aids can not only solve the existing danger in the process, but also the deionized water has a good dispersing effect, can prevent the agglomeration in the process of preparation, and obtain the flake zinc powder which meets the requirements of the national standard. The discrete element analysis software PFC3D can simulate the simulated mixing mill better. The motion state of the medium is displayed and the parameters of the medium are displayed, the changes of the process parameters and the micromechanical parameters are linked, which provide a better theoretical support for the selection of the process parameters, and the problem that the process parameters can only be optimized by experience and test method can be solved, and the new process and the existing process are used. The new technology is superior to the existing technology in economic, environmental protection, production efficiency, process optimization and flaky degree. The only deficiency is the content of metal zinc, and the defects of the new process have been further improved so that the flake zinc powder produced under the final process is not only satisfied with the national standard, but also comparable to Germany. National love card zinc powder.
The research of this paper solves the existing problems in the wet process of stirring mill to prepare the nanoscale technology, and makes a real innovation on the existing technology. The new technology after the innovation meets the new economic development model of "green environmental protection, energy saving and emission reduction". At the same time, the paper puts forward the PFC3D software technology of the research status of mixing mill. The method is also suitable for the preparation of other powder industry by mixing mill.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB44

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