| Along with large-scale and high efficient development, low cost operation, coal ratio improvement and increase of life-span of the blast furnace, the original fuel quality requirement is enhanced unceasingly. At the same time, along with change of mineral resources and development of domestic pellet technology, the charging structure is adjustment and optimization continually. The particle size of charging original fuel which becomes more and more important to improve the permeability of air and the utilization rate of gas affects the gas stream distribution of blast furnace.This paper analyzes and researches four sets of high precision DSP0740-the more step size inspection screen detection system which are designed by Zhengzhou University and Xinxiang Sida Company and used in Shougang Jingtang company. This equipment is used to test the particle size of the returned material1#and2#feeding systems of blast furnaces in Shougang. It is not only more convenient for works to examine and repair the feeding systems, but also can improve the utilization rate of resources. In this paper are the structure and principle of material particle size detection equipment and electric control procedure designed, are the weighing systems analyzed in theory combining with the actual working condition and the demand of the scene.The paper first introduces the structure characteristics and principle of DSP0740-the high precision step size inspection screen, analyzes the key technology and main technical indicators and provides the installation debugging method, this test equipment has the characteristics of screening high precision, compact structure, a small area covered, simple structure, easy to change screen plate etc. Through the different combination of three vibration motors to realize the three process of material screening, eliminating plugging material and conveying material, through adjusting the vibrating motors running time to improve screening efficiency.The part of automatic electric control is designed based on the working principle of inspection screen and motor operation sequence in this paper, the designs are mainly as follows:(1) the composition of material particle size detection screen control system to test returned coke and ore;(2) the design of PLC control program;(3) the excogitation of configuration picture;(4) the design of communication;(5) the way of data preservation.The theoretical analysis and simulation of the weighing system of material test equipment are finished in this paper, which provides a theoretical basis for programing and making the collected data accurate and reliable.Four sets of material particle size detection equipment has been finishing installation and debugging successfully. The system has been running at the ironmaking department of Shougang Jingtang company, automation degree is high, the program is readable, control operation is simple, data collection is accurate, and feeding system maintains convenience, which not only improves the operating efficiency of the workers, but also brings lots of benefits for the company especially feeding department. |
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