Research on making micro-beads by gas quenching from re-melted modified BOF steelmaking slag

Abstract

The influence of the addition amount of conditioning agent, gas quenching pressure, nozzle type and slag temperature on gas quenching effect of basic oxygen furnace (BOF) steelmaking slag were studied through the gas quenching system. The results show that the gas quenching rate basically increased with the increase in the amount of the conditioning agent by using BF slag as a conditioning agent. High gas quenching pressure and high Mach number of nozzle had a slight promotion effect on gas quenching rate. While the modified slag temperature had a significant influence on the gas quenching rate. The higher the slag temperature and the superheat degree, the higher the gas quenching rate. Gas-quenched steel slag micro-beads property is related to the amount of the conditioning agent. The granulation effect became worse and the mineral phases gradually changed to the glass phase with the increasing amount of the conditioning agent.

Get full access to this article

View all access options for this article.

References

Gao

Zhang

et al. Process of re-resourcing of converter slag. J Iron Steel Res Int. 2011;18(2):32–39. doi: 10.1016/S1006-706X(12)60006-5

Guo

Bao

Wang

Steel slag in China: treatment, recycling, and management. Waste Manage. 2018;78:318–330. doi: 10.1016/j.wasman.2018.04.045

Cheng

et al. An overview of utilization of steel slag. Procedia Environ Sci. 2012;16:791–801. doi: 10.1016/j.proenv.2012.10.108

Kamboleab

Paige-Greena

Kupolatia

et al. Basic oxygen furnace slag for road pavements: a review of material characteristics and performance for effective utilization in Southern Africa. Constr Build Mater. 2017;148:618–631. doi: 10.1016/j.conbuildmat.2017.05.036

Murphy

Meadowcroft

Barr

PV.

Enhancement of the cementitious properties of steelmaking slag. Can Metall Quart. 1997;36:315–331. doi: 10.1179/cmq.1997.36.5.315

Qasrawi

Shalabi

Asi

Use of low CaO unprocessed steel slag in concrete as fine aggregate. Constr Build Mater. 2009;23:1118–1125. doi: 10.1016/j.conbuildmat.2008.06.003

Zhang

Liao

et al. Steel slag treatment process and utilization technology of steel slag in China and abroad. J Iron Steel Res. 2013;25(07):1–4. Chinese.

Jiang

YX.

Treatment and complex utilization of steelmaking slag at Masteel New Area. Iron Steel. 2011;46(5):89–92 + 96. Chinese.

Xue

et al. Research on the sintering process and characteristics of belite sulphoaluminate cement produced by BOF slag. Constr Build Mater. 2016;122:567–576. doi: 10.1016/j.conbuildmat.2016.06.098

10.

Bodor

Santos

Cristea

et al. Laboratory investigation of carbonated BOF slag used as partial replacement of natural aggregate in cement mortars. Cement Concrete Comp. 2016;65:55–66. doi: 10.1016/j.cemconcomp.2015.10.002

11.

XL.

Shasteel Group's million tons of steel slag is abandoned on the riverside. China Environment News. 2018 July 29(002). Chinese.

12.

Gas blowing grinding technology of BOF slag and its industrialization. Chongqing: Chongqing University; 2003. Chinese.

13.

Chen

JX.

Metallurgy of iron and steel (steelmaking section). Beijing: Metallurgical Industry Press; 2009. Chinese.

14.

Liu

Pandelaers

Jones

et al. Effect of Al2O3 and SiO2 addition on the viscosity of BOF slag). Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts; 2016 May 22–25; Washington, USA. Switzerland: Springer International Publishers; 2016. p. 439–446.

15.

Zhang

Liu

et al. Quenched and tempered blast furnace slag as fiber raw materials. Chin J Environ Eng. 2013;7(12):4971–4977. Chinese.