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Qinhuangdao, China

Tian Y.,Northeastern University China | Tang S.,Northeastern University China | Wang G.,Northeastern University China | Wang P.,Shouqin Metal Materials Co.
Applied Mechanics and Materials | Year: 2012

A successful ultra fast cooling (UFC) technology has been applied to the plate rolling production line in Shouqin Metal Materials Co. Ltd. Industrial trials are reported for the production of X70 pipeline steels (about 70000 t) under UFC conditions. Pipeline steels with reasonably good properties have been produced on an industrial scale. UFC improves the temperature uniformity, the mechanical properties and the plate profile of X70 pipeline steel. The impact values of X70 pipeline steel at UFC mode exceed the standard requirements of X80 pipeline steel. The productivity is enhanced because cutting quantity of head and tail of the plate is reduced. The enhancement of control accuracy of the red back temperatures is favorable for industrial production of X70 pipeline steel. The reduced production of the steel-making has been industrialized achieved, since a new composition was designed by reducing the vanadium content to less than 0.045wt.%.

Shao T.-F.,University of Science and Technology Beijing | Wu K.,University of Science and Technology Beijing | Ding R.-C.,Shouqin Metal Materials Co. | Wang C.-M.,University of Science and Technology Beijing | And 2 more authors.
Kang T'ieh/Iron and Steel | Year: 2012

The cyclone dust of the second stage contains plenty of oxides-containing iron and carbon. Thus, it can be an efficient utilization to inject the cyclone dust back into the furnace as the additive, which can improve the combustion rate of the pulverized coal. The size distribution and chemical compositions of the dedusting ash of Shouqin BF was analyzed, which demonstrated the feasibility of adding cyclone dust as the additive of pulverized coal. Afterwards, the effects of adding different proportions of cyclone dust on the combustion of pulverized coal were determined. The optimum combustion results can be reached when the oxygen enrichment is 3% and the proportion of added cyclone dust is 6%. The experimental results of BF at Shouqin Company shows that the PCI system runs well and the production is stable when the proportion of added cyclone dust is below 3%. Therefore, adding the BF cyclone dust as the additive of pulverized coal is feasible, which will bring good economic and social benefits.

Zhang Q.,Northeastern University China | Gu Y.-L.,Shouqin Metal Materials Co. | Ti W.,Northeastern University China | Cai J.-J.,Northeastern University China
Dongbei Daxue Xuebao/Journal of Northeastern University | Year: 2010

With the blast furnace gas (BFG) system of an iron and steel works taken as an object, the relationship between the gas throughput and influencing factors on BFG generation/consumption was analyzed by grey correlation. A prediction model of BFG was developed on the basis of BP neural network for forecasting the supply and demand of BFG in the whole iron/steel-making process. The reasonability of the forecasting of BFG generation and consumption was discussed on various working conditions including normal operation and troubleshooting. The results showed that the forecasting model developed is of high precision with small errors and available to predict actually the BFG supply and demand so as to decrease the unnecessary BFG emission. The model is therefore able to lay a theoretical foundation to schedule the BFG utilization reasonably.

Yi Z.,Northeastern University China | Hu L.-H.,Shouqin Metal Materials Co. | Li G.-J.,Northeastern University China | Chen H.-G.,Northeastern University China
Dongbei Daxue Xuebao/Journal of Northeastern University | Year: 2011

Three kinds of relationships between characteristic parameters of gas radiation and mean beam lengths were found by using exponential wide band model, mean beam length calculation and Beer law. The emissivity, absorption coefficient and corresponding mean beam length in a non-gray gas system were obtained by coupling calculation, thus avoiding the absorption coefficient indispensable to inversely calculate a mean beam length. The results showed that compared with Hottel's chart and formula for mean beam lengths, the method presented in this paper is accurate enough to solve the problem of radiative heat transfer in engineering. Taking a zone of ternary reheating furnace model as an example, the emissivity and mean beam length for the slab and wall surfaces are calculated, which provides necessary conditions of calculating radiative heat transfer.

Tang S.,Northeastern University China | Liu Z.-Y.,Northeastern University China | Wang G.-D.,Northeastern University China | He Y.-C.,Shouqin Metal Materials Co.
Journal of Iron and Steel Research | Year: 2010

With the development of high-rise buildings, the demand of the steel plates for high-rise constructional steel and its performance requirement continues to upgrade. The performance requirement of steels for high-rise buildings was introduced and the developing trend in terms of high strength, heavy thickness and high performance were pointed out. The production situation, microstructural mechanisms and processing routes of the high performance steels for high-rise buildings with special characteristics such as low yield ratio, narrow yield fluctuation, laminar tearing resistance, low yield point, large heat input welding, fire resistance and so on were especially stated. Meanwhile, the advanced producing technologies of the steels for high-rise buildings in the steel enterprises at home and abroad were summarized.

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