Mechanical Engineering Science

Design and Engineering Application of Direct Mixing Lubrication System for Emulsion Pipeline in Secondary Cold Rolling Mill

DONGHangzhe, ZHANGYazhen, HUWantong, BAZhenhua, ZHANGYanyan

Abstract


With the benefit fierce competition in the steel industry market in recent years, double cold reduction products have been developed towards strength improvement and thickness reduction. The traditional cold-rolling lubrication process with a fixed flow rate and concentration cannot solve the problems which cover uncontrollable shape of strip product and the excessive consumption of lubricating oil. Moreover,based on the analysis of the traditional direct application lubrication system of double cold reduction, a set of design scheme suitable for the emulsion pipeline direct mixing lubrication system of double cold reduction unit is proposed.The design complete the selection of key components which include the static mixer and atomization nozzle selection, pump and oil pump design selection, pipeline design selection, flow type selection, pressure gauge selection, electronic control cabinet design selection and other aspects. Equipment of the emulsion pipeline direct mixing lubrication system of double cold reduction has been developed. Comparing with characteristics of the traditional direct aplication lubrication system, the emulsion pipeline direct mixing lubrication system was better applied to the production practice of a 1220 double cold reduction mill. The consumption of ton of steel was reduced by 9.6%. The rolling energy consumption and oil consumption comprehensive costs decreased by 10.7%, and the strip steel section thickness difference was reduced by 19.3%. In addition, the plate shape quality defect rate decreased by 25.6 %, otherwise creating a large economic benefit for the unit and promoting the application value.

Keywords


double cold reduction; emulsion; direct mixing lubrication system; static mixer; plate thickness

Full Text:

PDF

References


BAI Zhen-hua; SONG He-chuan. Research development of double cold reduction equipment and process. Journal of Plasticity Engineering, 2016, 23(06), pp. 87-93.

ZHANG Hong-bo; FENG Xiao-yong. Research progress and application status of double reduced materials for tin-plate. Hebei Metallurgy, 2017, (04), pp. 1-5.

JI Jiang; HU Hong. Development and application of skin pass and double cold-reduced mill processing for high quality ultra-thin uncoated tin-plated sheet. Steel Rolling, 2018, 35(01), pp. 49-51.

CUI Ya-ya; LI Bo-yang. Comprehensive optimization setting of emulsion flowrate and concentration for double cold reduction mill. Iron and Steel, 2018, 53(02), pp. 40-44.

WEI Li-qun; DAI Zhi-fang. Research of vibration and strategy in high speed cold-rolling mill. Journal of Mechanical Engineering, 2016, 52(11), pp. 88-94.

Kimura Y; Fujita N. High-speed rolling by hybrid-lubrication system in tandem cold rolling mills. Journal of Materials Processing Technology, 2015, 216, pp. 357-368.

Das P K; Legrand J. Drop Breakage Model in Static Mixers at Low and Intermediate Reynolds Number. Chemical Engineering Science, 2005, 60(1), pp. 231-238.

LI Xiu-jun; CUI Ya-ya. Model of plate-out oil film thickness on strip surface of direct application system in double cold rolling and its influence factors. Journal of Plasticity Engineering,2018, 25(4), pp. 285-290.

WANG Xiu-gang; GUO Wa-li. Experimental and numerical study on liquid-liquid dispersion in static mixer. Journal of Chemical Industry and Engineering, 2012, 63(03), pp. 767-774.

Lobry E; Theron F. Turbulent liquid–liquid dispersion in SMV static mixer at high dispersed phase concentration. Chemical Engineering Science, 2011, 66(23), pp. 5762-5774.

XU Bao-dong. Chemical Pipeline Design Manual, 1st ed. Chemical Industry Press: Beijing, China, 2011: pp. 7-8.




DOI: https://doi.org/10.33142/mes.v2i1.2619

Refbacks

  • There are currently no refbacks.


Copyright (c) 2020 Hangzhe DONG, Yazhen ZHANG, Wantong HU, Zhenhua BA, Yanyan ZHANG

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.