Analysis of Basic Properties and Comprehensive Utilization of the Hot Braised Slag

Zhao, Fei; Ju, Jian Tao; Liao, Jie Long; Kong, Wei Ming; Dang, Yao Jun

doi:10.4028/www.scientific.net/amr.753-755.623

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…This is mainly due to the large interaction between the SSP particles. When the SSA is too large, the active components in SSP agglomerate, reduces the contact surface between SSP and water, and reduces the hydration reaction rate and final strength [88][89][90]. It is not advisable to increase the SSA to obtain higher strength.…”

Section: Effect Of Specific Surface Area (Ssa) On Strengthmentioning

confidence: 99%

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Effects of Steel Slag Powder as A Cementitious Material on Compressive Strength of Cement-Based Composite

Guohua

Jin

et al. 2023

Minerals

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The utilization rate of steel slag in China is far behind that of developed countries. The annual output of steel slag is still increasing, resulting in a large amount of accumulation, causing environmental pollution. This paper summarizes and analyzes the relevant research on steel slag powder (SSP) as a cementitious material, studies the effect of SSP replaces cement as single or multiple admixtures, with different specific surface areas, and the amount of activator on the compressive strength of cement-based material. The results show that due to the lower content of active substances in SSP compared to cement, the strengths decrease with the increase of the replacement ratio R, which is the ratio of SSP to cement. R = 30% is important for replacing cement with single SSP. When replacing cement with the mixture of SSP and slag/fly ash, the strengths of most groups decrease with the increase of the mix replacement ratio Rc. The decreasing trend is not obvious due to the pozzolanic effect. There is an optimal dosage for using a single activator to activate SSP. The effect of using multiple activators in combination is better than that of single one. The strength increases with the increase of the specific surface area (SSA) of SSP. However, if the SSA is too high, it will not only increase the preparation cost, but also reduce the increase in strength due to the agglomeration effect of SSP. The optimal range of specific surface area SSA is 400 m2/kg~500 m2/kg. With the increase of age t, the compressive strength increases. The effect of the curing methods on the compressive strength is hot and heat curing > standard curing > natural curing.

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Section: Effect Of Specific Surface Area (Ssa) On Strengthmentioning

confidence: 99%

“…Using chemical activators to activate SSP is another important method to improve the strength. In recent years, research on the types and dosages of chemical activators has been carried out [64,[88][89][90][91][92][93][94]. Details of common chemical activators are shown in Table 7.…”

Section: Effect Of Chemical Activated Ssp On Strengthmentioning

confidence: 99%

Effects of Steel Slag Powder as A Cementitious Material on Compressive Strength of Cement-Based Composite

Guohua

Jin

et al. 2023

Minerals

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“…[ 30 , 31 ] In recent years, China’s research on the utilization of steel slag has mainly focused on the treatment of steel slag by the thermal braising method. [ 32 – 34 ] The thermal braising method is to heat the steel slag under the conditions of steam and high pressure. Through the thermal braising treatment, the unstable mineral phase contained in it is converted into stable minerals.…”

Section: Introductionmentioning

confidence: 99%

Three-Stage Method Energy–Mass Coupling High-Efficiency Utilization Process of High-Temperature Molten Steel Slag

Chen

Wang

Liu

et al. 2021

Metall Mater Trans B

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High-temperature molten steel slag is a large amount of industrial solid waste containing available heat energy and resources. This paper introduces an efficient and comprehensive utilization process of high-temperature molten steel slag. The waste heat energy in the high-temperature molten steel slag can be fully recovered through the three-stage heat exchange. Through mass balance and energy balance, the theoretical heat recovery rate can reach 81.42 pct when the waste heat stored in steel slag is converted into usable heat energy, and the exergy efficiency of the overall system is 27.93 pct. When the waste heat stored in the steel slag is converted for electric energy, the theoretical heat recovery rate can reach 24.49 pct, and the exergy efficiency of the overall system is 33.83 pct. When the waste heat stored in steel slag is used for cogeneration, the theoretical heat recovery rate can reach 83.98 pct, and the exergy efficiency of the overall system is 38 pct. The normal-temperature solid steel slag produced by the process is easy for iron selection and subsequent high value-added utilization. The solidification of steel slag in this process consumes a large amount of CO 2 so that the free calcium oxide (f-CaO) in the steel slag is fixed, which is more conducive to subsequent utilization, thereby achieving the purpose of energy saving and emission reduction. Compared with the utilization of traditional steel slag, this process can better utilize the energy and resources contained in steel slag and provides a new method for fully utilizing the waste heat energy and resource attributes of high-temperature molten steel slag. Supplementary Information The online version of this article (10.1007/s11663-021-02213-7).

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Analysis of Basic Properties and Comprehensive Utilization of the Hot Braised Slag

Cited by 2 publications

References 4 publications

Effects of Steel Slag Powder as A Cementitious Material on Compressive Strength of Cement-Based Composite

Effects of Steel Slag Powder as A Cementitious Material on Compressive Strength of Cement-Based Composite

Three-Stage Method Energy–Mass Coupling High-Efficiency Utilization Process of High-Temperature Molten Steel Slag

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