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Zhang G.,Taiyuan University of Technology | Zhao Y.,Harbin University of Science and Technology | Liu C.,Shanxi Taigang Stainless Steel Co.
Communications in Computer and Information Science | Year: 2011

According to the function of recycled water in Center Air-condition Set and the run mode of recycle pumper, this paper proposes the method of power saving, discusses the corresponding structure of automation control system, draws up the control system block diagrams for the temperature control and pressure control, describes the system configuration for hardware, as well as provides the method in programming for the temperature data sampling, digital filter, digital controller and etc. © 2011 Springer-Verlag. Source

Li Q.,Shanxi Taigang Stainless Steel Co.
Kang T'ieh/Iron and Steel | Year: 2013

The relationships among rotation speed of main exhaust fan, air volume, sintering machine speed and FFS (front flame speed) was analyzed and the sinter production process was stabilized by adjusting the rotation speed of new adapted converter controlled main exhaust fan. A FFS-based automatic control system for rotation speed of main exhaust fan was developed. The stability of FFS was remarkably improved and burn-through point (BTP) was stabilized at the penultimate wind box. Under the assistance of this system in the sintering plant of TISCO, the stability rate of BTP in the penultimate wind box is up to 98.1%, which is 35.5% higher than manual control, while the rate of return fine was reduced by 3.46%. The advantage of the converter controlled main fan can be enhanced by the system. The power consumption of the main exhaust fan can be reduced by 28.6%, comparing to power frequency running. Source

Zhao H.-Y.,Shanxi Taigang Stainless Steel Co.
Journal of Iron and Steel Research | Year: 2012

Experiments of melting Inconel 690 by three different kinds of crucible material MgO, CaO, Al 2O 3 in 200 and 500kg VIM (Vacuum induction melting) were done. Sulfer and oxygen content ,oxidate sizes and number of the products were analyzed to study the effect of crucible material on purity of Ni-based alloy Inconel 690 melted by VIM. The results show that the oxygen content of product is lowest by melting in Al 2O 3 crucible, achieving (10 15) × 10 -6; There are 5 - 10μm D type oxidates amd less than 50 μm B type oxidates in the ingot, the purity is high. The sulfer content of product is lowest by melting in CaO crucible, achieving 10× 10 -6, the average oxygen content is 33×10 -6, there are lots of fine 5 -l0 μm D type oxidates and some 50 -100 μm Ca-aluminate oxidates; The oxygen and sulfer content in the ingot melted by MgO crucible is 28 × 10 -6 and 55 ×10 -6 respectively. There are lots of B type oxidates larger than 50 μm. Therefore, the Al 2O 3 crucible is the best choice to produce Inconel 690 by VIM. Source

Wang F.,Shanxi Taigang Stainless Steel Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2016

The composition inhomogeneity of certified reference materials/samples for instrumental analysis was mainly caused by macrosegregation in casting process. The prediction of possible macrosegregation in cast ingot was the precondition and foundation for the initial homogeneity inspection of certified reference materials/samples. Based on the analysis and discussion on basic conception of initial homogeneity inspection, the certified reference materials/samples for instrumental analysis were classified into four types according to casting and formation processes, i.e., cast ingot-forging rolling type, continuous casting-forging rolling type, multi-cast ingots type and multi-cast ingots cutting type. Under the guidance of redistribution theory of solute atoms in solidification process, the macrosegregation characteristics formed in various casting processes were analyzed and investigated. The segregation types which should be paid attention in initial homogeneity inspection were proposed. The study provided the basis for making sampling plan in initial homogeneity inspection. © 2016, CISRI Boyuan Publishing Co., Ltd. All right reserved. Source

Yang Z.-R.,Shanxi Taigang Stainless Steel Co.
Kang T'ieh/Iron and Steel | Year: 2015

Based on production, operational furnace profiles monitoring and maintenance of two blast furnaces (BFs) with volume of 4350 m3 in TISCO, it was found that there was the interaction between upper and lower operational furnace profiles. What's more, it had an influence on hearth life. The upper operational furnace profile was affected by bosh gas volume, shaft refractory selection and flow direction of shaft cooling water. It was helpful to formed reasonable upper furnace profile by appropriate bosh gas volume, decreased gas channel between cooling plates and lining bricks and divisional cooling of horizontal shaft cooling water. There was the interaction between shaft middle operational furnace profile and thickness of skull. The operational furnace profile above tuyere also had the interaction with erosion and accretion of hearth bottom. In order to improve and maintain reasonable operational furnace profiles, the breathability and permeability of deadman should be maintained. The hard extruding repairing and furnace protection of schreyerite could also be utilized. Therefore, The operation indicators of furnace condition could be improved and the hearth erosion could be constrained by above measures. For the long life of hearth bottom, some measures are taken including the design, material selection and masonry of hearth bottom based on the new. ©, 2014, Chinese Society for Metals. All right reserved. Source

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