Optimization of alkali metals discharge performance of blast furnace slag and its extreme value model

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI:10.1515/htmp-2022-0013

Yan-bo Chen, Yong Deng, Ran Liu, Li-da Chen, Xingfeng Guo

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引用次数: 1

Abstract

Abstract In order to improve the alkali metals discharge capacity of slag, the gas-slag balance method was used to carry out the slag alkali metals discharge experiments, the effect of slag composition on alkali metals discharge performance of slag was studied, some suggestions were put forward to optimize the alkali metals discharge performance of slag and the extreme value model was established. The results show that the alkali metals discharge ratio of slag decreased with the increase in the binary basicity and mass fraction of TiO2, and increased with the increase in the mass fraction of MgO, Al2O3 and MnO. The change in slag composition led to the change in the solubility of alkali metal oxides in liquid slag, decomposition of alkali metal silicates, structure of the slag in liquid state and viscosity of the slag, and then affected the alkali metals discharge performance of slag. The ability of slag to absorb alkali metals was certain under the condition of fixed composition. With the help of slag alkali metals discharge extreme value model, whether the current slag meets the needs of blast furnace alkali metals discharge could be evaluated. The alkali metals discharge capacity of slag could be improved by optimizing the alkali metals discharge performance of slag combined with experiments and actual production.

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高炉炉渣碱金属排放性能优化及其极值模型

摘要为了提高炉渣的碱金属排放能力，采用气渣平衡法进行了炉渣碱金属排放试验，研究了炉渣成分对炉渣碱金属排出性能的影响，提出了优化炉渣碱金属排放性能的建议，并建立了极值模型。结果表明，炉渣的碱金属排放率随二元碱度和TiO2质量分数的增加而降低，随MgO、Al2O3和MnO质量分数的增大而增加。炉渣成分的变化导致碱金属氧化物在液态炉渣中的溶解度、碱金属硅酸盐的分解、液态炉渣的结构和炉渣的粘度发生变化，进而影响炉渣的碱金属排放性能。在成分固定的条件下，矿渣对碱金属的吸收能力是一定的。借助炉渣碱金属排放极值模型，可以评估当前炉渣是否满足高炉碱金属排放的需要。结合试验和实际生产，通过优化炉渣的碱金属排放性能，可以提高炉渣的碱合金排放能力。

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来源期刊

High Temperature Materials and Processes 工程技术-材料科学：综合

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

3.9 months

期刊介绍： High Temperature Materials and Processes offers an international publication forum for new ideas, insights and results related to high-temperature materials and processes in science and technology. The journal publishes original research papers and short communications addressing topics at the forefront of high-temperature materials research including processing of various materials at high temperatures. Occasionally, reviews of a specific topic are included. The journal also publishes special issues featuring ongoing research programs as well as symposia of high-temperature materials and processes, and other related research activities. Emphasis is placed on the multi-disciplinary nature of high-temperature materials and processes for various materials in a variety of states. Such a nature of the journal will help readers who wish to become acquainted with related subjects by obtaining information of various aspects of high-temperature materials research. The increasing spread of information on these subjects will also help to shed light on relevant topics of high-temperature materials and processes outside of readers’ own core specialties.