本文選題：X射線 + 選煤廠�。� 參考：《安徽理工大學(xué)》2017年碩士論文

【摘要】：煤和矸石的分選始終是煤炭資源開(kāi)發(fā)利用首先要解決的問(wèn)題,綠色選煤要求對(duì)環(huán)境的影響盡可能的小,對(duì)于粒度較小(50mm)的煤采用重介旋流器入洗很流行,其中極細(xì)的煤(0.045mm)可以通過(guò)浮選的方式處理,但對(duì)于大塊的煤和矸石,現(xiàn)在仍有很多選煤廠采用傳統(tǒng)方式,通過(guò)選矸工在原煤準(zhǔn)備環(huán)節(jié)的皮帶上通過(guò)生產(chǎn)經(jīng)驗(yàn),付出幸苦的勞動(dòng),將大塊的矸石和雜物去除。這個(gè)環(huán)節(jié)是很重要的,在煤和矸石分選前將大塊矸石去除,可以大大降低入選原煤的灰分,節(jié)約了破碎分選過(guò)程的能耗,提高生產(chǎn)效率。論文通過(guò)對(duì)來(lái)自淮北楊莊煤場(chǎng)的煤樣實(shí)驗(yàn)分析。首先選取大塊適合加工的煤樣,先用鉆孔取樣機(jī)對(duì)大塊的煤矸取樣,得到圓柱體的樣品,使用石材切割機(jī)對(duì)圓柱體樣品大概高度進(jìn)行加工,使每組樣品中高度有所區(qū)別,對(duì)這些切割后的樣品使用磨礦機(jī)進(jìn)一步加工的到規(guī)整的圓柱體,同時(shí)使每組樣品的高度盡可能的按照"3、4、5、6、7、8、9、10"的高度排列。完成了制樣工作后采用X射線檢測(cè)儀對(duì)所制得的樣品檢測(cè),調(diào)整不同的參數(shù)值,主要是調(diào)整不同的電流電壓,獲得一系列的檢測(cè)圖像,對(duì)于這些圖像,將其轉(zhuǎn)化為灰度圖片,分析它們對(duì)應(yīng)的歸一化灰度直方圖,在軟件matlab的環(huán)境下編寫(xiě)一些函數(shù)來(lái)計(jì)算一個(gè)特征值來(lái)表示對(duì)于某個(gè)特定樣品在一定的電壓電流的條件下,在檢測(cè)儀所產(chǎn)生的圖片,據(jù)此來(lái)研究如何在辨別矸石的過(guò)程中應(yīng)用用X射線。對(duì)于物料的分散排列機(jī)構(gòu)和自動(dòng)排矸機(jī)構(gòu)進(jìn)行了一定的研究,分別應(yīng)用了開(kāi)環(huán)的和帶有反饋的控制規(guī)律,對(duì)于硬件機(jī)構(gòu)做了一定的設(shè)想,并對(duì)于該機(jī)構(gòu)的正常運(yùn)行,通過(guò)PLC結(jié)合傳感器和執(zhí)行器,初步完善了這些設(shè)想,對(duì)于PLC做了選型和梯形圖程序的編寫(xiě)。
[Abstract]:The separation of coal and gangue has always been the first problem to be solved in the development and utilization of coal resources. Green coal preparation requires that the impact on the environment be as small as possible. For coal with a smaller particle size of 50 mm), it is very popular to use heavy medium cyclone for washing coal. The extremely fine coal can be treated by flotation, but for large blocks of coal and gangue, there are still many coal preparation plants that adopt the traditional way, through the production experience on the belt of the raw coal preparation link, to work happily and painstakingly. Remove large pieces of gangue and debris. This link is very important. Removing large gangue before coal and gangue separation can greatly reduce ash content of raw coal, save energy consumption in crushing and sorting process, and improve production efficiency. This paper analyzes the coal samples from Yangzhuang coal farm in Huaibei. First of all, select the large coal sample suitable for processing, first, sample the bulk coal gangue by drilling the prototype, get the sample of the cylinder, use the stone cutting machine to process the cylinder sample about height, so that the height of each group of samples is different. These cut samples are further processed into regular cylinders by a mill, and the height of each set of samples is arranged as high as possible according to the height of "3'4'4'5'5'6'7'7'/ 8'/ 9'10". After the sample preparation was finished, the sample was detected by X-ray detector, and different parameter values were adjusted, mainly by adjusting different current and voltage to obtain a series of detection images. For these images, the images were transformed into grayscale images. By analyzing their corresponding normalized gray histograms, we write some functions in the software matlab environment to calculate an eigenvalue to represent the images generated by the detector under the condition of a certain voltage and current for a particular sample. The application of X-ray in the identification of gangue is studied. In this paper, the dispersing and arranging mechanism of materials and the automatic gangue mechanism are studied. The open loop and feedback control laws are applied, and the hardware mechanism is envisaged, and the normal operation of the mechanism is also discussed. Through the combination of sensors and actuators with PLC, these ideas are preliminarily perfected, and the PLC is selected and the program of ladder diagram is compiled.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TD94

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本文編號(hào)：2015270