【摘要】：高爐煉鐵是我國最主要的一種煉鐵途徑,原料在進(jìn)入高爐之前,要先經(jīng)過一步叫做燒結(jié)的工藝。在燒結(jié)之前,需先進(jìn)行原料的制備。由于用于制備燒結(jié)原料的合金礦粒徑大小不一,無法直接用于生產(chǎn),故需要有一套粒度檢測裝置,可以快速地實現(xiàn)粒度的篩分。本文所述的合金礦粒度檢測系統(tǒng),就是一個可以實現(xiàn)多級篩分的裝置。文章首先介紹了該檢測裝置的結(jié)構(gòu)特點及工作原理,并對其中的關(guān)鍵技術(shù)作了相應(yīng)的闡述。該裝置上以三角形形式安裝三臺振動電機(jī),通過采用單個或者多個不同的振動電機(jī)加以組合,以提供多種激振方式和工作程序,進(jìn)而實現(xiàn)物料的篩分、剔卡和直線輸送三種工序。通過對振動時間的調(diào)整,可以盡可能地提高篩分效率和速度。文章根據(jù)檢測裝置的工作原理,明確了實現(xiàn)各個工序的電氣元件的動作順序,選取了相應(yīng)的控制元件,并編制了對應(yīng)的控制程序。通過控制系統(tǒng)的設(shè)計,不僅可以實現(xiàn)系統(tǒng)的自動運(yùn)行,也可以實現(xiàn)手動控制。自動控制,滿足了工業(yè)生產(chǎn)現(xiàn)場對時間成本的要求,同時,手動控制方式方便工人對設(shè)備進(jìn)行檢修和維護(hù)。文章詳細(xì)介紹了該檢測系統(tǒng)的重要組成部分—稱重系統(tǒng)。該系統(tǒng)中每一粒級的稱重系統(tǒng)包含三只同型號、近似等邊三角形分布的稱重傳感器。對該稱重系統(tǒng)進(jìn)行受力分析,建立了其數(shù)學(xué)模型,在simulink環(huán)境下,對系統(tǒng)在階躍信號激勵時進(jìn)行了仿真分析。在新鄉(xiāng)四達(dá)公司,模擬生產(chǎn)現(xiàn)場的實際狀況,以重量的階躍信號作為稱重系統(tǒng)的激勵,進(jìn)行了大量的燒結(jié)球團(tuán)實物試驗。試驗結(jié)果驗證了仿真結(jié)果的正確性,得到了準(zhǔn)確的采樣時間,為編寫物料采樣程序提供了依據(jù)。文章最后介紹了控制頁面的設(shè)計。本文中采用的是VB程序進(jìn)行控制界面的設(shè)計,同時用VB編寫了PLC與計算機(jī)通訊程序。在VB軟件中,利用各種自帶的控件可以快速地設(shè)計出界面友好的控制頁面,同時提供了通訊控件—MSComm。該控件提供了一系列標(biāo)準(zhǔn)通信命令的接口,它允許建立串口連接,可以連接到其他通信設(shè)備(如Modem)。該檢測系統(tǒng)可以滿足多級篩分的要求,效率快,精度高,設(shè)計的控制系統(tǒng)運(yùn)行穩(wěn)定。
[Abstract]:Blast furnace ironmaking is the most important way of ironmaking in our country. Before entering blast furnace, raw materials must go through a process called sintering. Before sintering, the raw materials need to be prepared. Because the size of gold deposit used to prepare sintered raw materials is different, it can not be directly used in production, so it is necessary to have a set of particle size detection device, which can quickly realize particle size screening. The alloy ore particle size detection system described in this paper is a device which can realize multi-stage screening. In this paper, the structural characteristics and working principle of the detection device are introduced, and the key technologies are described accordingly. Three vibration motors are installed on the device in the form of triangles, which are combined by using single or more different vibration motors to provide a variety of excitation modes and working procedures, so as to realize the screening of materials. There are three processes: card removal and straight line transportation. By adjusting the vibration time, the screening efficiency and speed can be improved as much as possible. According to the working principle of the detection device, this paper defines the action sequence of the electrical components in each process, selects the corresponding control elements, and compiles the corresponding control program. Through the design of the control system, not only the automatic operation of the system can be realized, but also manual control can be realized. Automatic control meets the requirements of time cost in industrial production site. At the same time, manual control is convenient for workers to repair and maintain the equipment. In this paper, the weighing system, which is an important part of the detection system, is introduced in detail. The weighing system of each grain size in this system consists of three weighing sensors of the same type, which are approximately equilateral triangle distribution. The force analysis of the weighing system is carried out, and its mathematical model is established. Under the environment of simulink, the system is simulated and analyzed when the step signal is excited. In Xinxiang Sida Company, a large number of physical tests of sintered pellets were carried out by simulating the actual situation of the production site and taking the weight step signal as the excitation of the weighing system. The experimental results verify the correctness of the simulation results and obtain the accurate sampling time, which provides the basis for compiling the material sampling program. At the end of the paper, the design of control page is introduced. In this paper, VB program is used to design the control interface, and the communication program between PLC and computer is written with VB. In VB software, the interface friendly control page can be designed quickly by using various self-contained controls, and the communication control-MSComm. is provided at the same time. The control provides an interface to a series of standard communication commands that allow serial port connections to be connected to other communication devices, such as Modem). The detection system can meet the requirements of multi-stage screening, fast efficiency, high accuracy, and the designed control system runs stably.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TF52;TP274

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