碱度对生球质量和球团矿抗压强度的影响

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基金项目:

华北理工大学杰出青年基金资助项目(JP201508)

河北省钢铁联合基金资助项目(E2015209073)

河北省重点研发计划自筹项目(162176440)

The Impact of Basicity on the Green Ball Quality and Cruslring Strength of Pellets

1. College of Metallurgy and Engineering, North China University of Science and Engineering and Technology, Tangshan 063009, Hebei, China;
2. Hebei Iron and Steel Group Co., Ltd., Handan 056015, Hebei, China;
3. College of Metallurgy, Northeastern University, Shengyang 110004, Liaoning, China;
4. College of Foreign Language, North China University of Science and Engineering and Technology, Tangshan 063009, Hebei, Chinay

摘要: 通过改变A矿粉和B矿粉的配比来研究碱度对生球质量和球团矿抗压强度的影响。研究发现:随着碱度的提高,生球的落下强度、抗压强度逐渐降低,热爆裂温度逐渐升高;随着碱度提高,在焙烧过程中赤铁矿晶粒不断发育长大,但球团矿中产生的低熔点硅酸盐矿物增多并相互聚集在一起,恶化了赤铁矿晶粒间的连晶程度,同时增加了球团矿中的孔隙,导致球团的抗压强度逐渐降低。
- 球团矿 /
- 碱度 /
- 成球性 /
- 硅酸盐矿物 /
- 抗压强度
Abstract: In this paper the impact of basicity on the green ball quality and cruslring strength of pellets had been investigated by changing the ratio of A fine powder and B mineral powder. When the basicity is increased, the incidence strength and the compression strength of the green ball gradually decrease, but thermal explosion temperature increases. At the same time hematite crystal grains develops and grows up continuously in the process of roasting,however, the low melting point silicate minerals producing in the pellets increases in volume and aggregate together, which will worsen the connection degree of hematite crystal, at the same time, the ratio of pore in pellets increases, causing the decrease in compressive strength of pelletsgradually.
- pellet /
- basicity /
- spheronization /
- silicate minerals /
- the strength of compression