| 1 | Study on the optimization of the combined blown converter process in Chongqing Iron and Steel Company显示文摘The effects of lance height and bottom blown flowrate on the mixed time,the splashing amount,the penetrating depth,and the level fluctuation of an 85 t combined blown converter have been studied using a water model.The results show that the maximal stirring energy is provided to the bath at the top lance height of about 50-100 mm.When the top lance height is in the range of 90- 110 mm,the splashing amount caused by the top jet can reach the maximal value.The appropriate operational parameters of Chongqing Iron and Steel Company(CISC)converter have been established that the top lance height is 1600-1760 mm and the bot- tom blowing flowrate is 240-480 Nm^3/h in the primary phase of a heat,1100-1300 mm and 160-200 Nm^3/h in the second phase,and 1040-1120 mm and 200-350 Nm^3/h in the end phase.Also,the trial shows that the metallurgical result of the studied blow pattern is better than that of the former pattern.At the starting 3-4 min of a heat,the strong splashing is eliminated. | Ping Tang Yangyang Yu Guanghua Wen Mingmei Zhu Liang Zhou Yiju Long Qing Liang | 2008 | Journal of University of Science and Technology Beijing2008，15，1： | 2 |
| 2 | Joint inversion of gravity and vertical gradient data based on modified structural similarity index for the structural and petrophysical consistency constraint显示文摘Joint inversion is one of the most effective methods for reducing non-uniqueness for geophysical inversion.The current joint inversion methods can be divided into the structural consistency constraint and petrophysical consistency constraint methods,which are mutually independent.Currently,there is a need for joint inversion methods that can comprehensively consider the structural consistency constraints and petrophysical consistency constraints.This paper develops the structural similarity index(SSIM)as a new structural and petrophysical consistency constraint for the joint inversion of gravity and vertical gradient data.The SSIM constraint is in the form of a fraction,which may have analytical singularities.Therefore,converting the fractional form to the subtractive form can solve the problem of analytic singularity and finally form a modified structural consistency index of the joint inversion,which enhances the stability of the SSIM constraint applied to the joint inversion.Compared to the reconstructed results from the cross-gradient inversion,the proposed method presents good performance and stability.The SSIM algorithm is a new joint inversion method for petrophysical and structural constraints.It can promote the consistency of the recovered models from the distribution and the structure of the physical property values.Then,applications to synthetic data illustrate that the algorithm proposed in this paper can well process the synthetic data and acquire good reconstructed results. | Sheng Liu Xiangyun Wan Shuanggen Jin Bin Jia Quan Lou Songbai Xuan Binbin Qin Yiju Tang Dali Sun | 2023 | Geodesy and Geodynamics2023，14，5： | 0 |
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