Comprehensive Utilization Technology of Steel Slag

2019 ◽  
pp. 305-356
Author(s):  
Fenglan Han ◽  
Laner Wu
Keyword(s):  
Steel Slag ◽  
Comprehensive Utilization

Study of Comprehensive Utilization on the Steel Slag

2014 ◽  
Vol 488-489 ◽  
pp. 137-140 ◽  
Author(s):  
Wei Pan Zhang ◽  
Su Ju Hao ◽  
Wu Feng Jiang ◽  
Qian Qian Ren ◽  
Yu Zhu Zhang
Keyword(s):  
Steel Industry ◽  
Rapid Development ◽  
Steel Slag ◽  
Present Situation ◽  
Development Trend ◽  
Comprehensive Utilization ◽  
The Development Trend

At present steel industry is obtained a rapid development in China. More and more steel slag is accumulated. How to deal with steel slag becomes a hot problem. In this paper, the source, composition and characteristics of steel slag are introduced firstly. Then the methods of comprehensive utilization on the steel slag are summarized. Finally the problems are put up and the development trend of steel slag utilization is prospected according to the present situation of comprehensive utilization of steel slag.

Utilization of Steel Slags in the Cement Industry

2014 ◽  
Vol 599 ◽  
pp. 98-102 ◽  
Author(s):  
Jiang Feng Li ◽  
Xiu Cheng Luo ◽  
Meng Ke Sun ◽  
Wei Guo Shen ◽  
Bing Cao ◽  
...  
Keyword(s):  
Steel Slag ◽  
Cementitious Materials ◽  
High Reactivity ◽  
Cement Industry ◽  
Cement Clinker ◽  
Chemical Compositions ◽  
New Approach ◽  
Volume Stability ◽  
Comprehensive Utilization ◽  
Steel Refining

The production of steel slag, a byproduct of the steel refining keeps increasing rapidly and it reached 90.42 million tons in 2011 in China, but its comprehensive utilization ratio is only 22% and far less than the ratio of 65% in Europe. Main chemical compositions of steel slag are CaO, SiO2, Al2O3, FeO, Fe2O3, MgO, MnO, P2O5 and so on, C3S, C2S, C3MS2, RO phase are its common minerals. Due to its high reactivity and Ferro content, steel slag has high potential utilization as supplementary hydraulic cementitious materials or cement clinker meal in cement industry. A method of multiple phased sintering was presented, it can break through the bottlenecks for the steel slag using in the cement industry, e.g. volume stability and grindability ,the carbon emission of cement industry is slashed, it is an effective new approach to massively utilize steel slag in cement industry.

Experimental Study on the Comprehensive Application of Steel Slag in Concrete

2016 ◽  
Vol 867 ◽  
pp. 157-161
Author(s):  
Shi Ran Zhao ◽  
Kai Feng Zhang ◽  
Gang Meng ◽  
Yuan Yao ◽  
Ning Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Coarse Aggregate ◽  
Steel Slag ◽  
Cementitious Material ◽  
Good Resistance ◽  
Volume Stability ◽  
Comprehensive Utilization ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Maximum Content

In this paper, the performance of steel slag composite cementitious material and the performance of steel slag concrete were studied, which provides reference for the comprehensive utilization of steel slag. The test shows that the activity of steel slag composite cementitious material with the specific surface area is greater than or equal to 400m2/kg to meet the use requirements; When the maximum content of coarse aggregate of steel slag was 25%, the volume stability of steel slag concrete was best. But when the content of steel slag powder was controlled within 30%, the concrete had good resistance to carbonation.

Experimental Study of the Soundness and Compatibility of Baosteel Steel-Slag Powder Applied in Cement Concrete

2011 ◽  
Vol 239-242 ◽  
pp. 679-682
Author(s):  
Jia Ying Sun ◽  
Fu Dan Chen
Keyword(s):  
Steel Slag ◽  
Fine Powder ◽  
Cement Concrete ◽  
Comprehensive Utilization ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Concrete Admixtures ◽  
The World ◽  
The Cost ◽  
Concrete Component

To reduce the cost and improve concrete performance, massive admixtures were needed to be added to the concrete. With the research going, the high quality mixture is increasingly becoming the indispensable concrete component. The steel slag powder is the steel-slag comprehensive utilization technical commanding point compared with the level of the steel slag application nowadays in the world. In order to develop the application of the steel slag fine powder in cement concrete domain, this article analyzes autoclaved soundness of the Baosteel steel-slag fine powder as well as the compatibility of it with the cement and the concrete admixtures.

scholarly journals Effect of binary basicity on chromium occurrence in stainless steel slag

2021 ◽  
pp. 43-43
Author(s):  
Q. Zeng ◽  
J.-L. Li ◽  
G.-J. Ma ◽  
H.-Y. Zhu
Keyword(s):  
Stainless Steel ◽  
Steel Slag ◽  
Calcium Content ◽  
Synthetic Slag ◽  
Leaching Behavior ◽  
Stainless Steel Slag ◽  
Comprehensive Utilization ◽  
Precipitation Occurrence ◽  
The Relationship ◽  
Lower Basicity

Comprehensive utilization of stainless-steel slag (SSS) is restrained due to the risk of Cr6+ leaching. Based on the studying the microstructure of synthetic slag (SS) containing Cr2O3with XRD, SEM-EDS?and Image pro, the effect of binary basicity on the chromium occurrence in SSS was investigated. The results indicated that the binary basicity had a significant impact on the properties of spinel crystals. There was a positive correlation between the calcium content in spinel crystals and the SS basicity. The size of spinel crystals varied from large to small and the precipitation occurrence changed with the basicity increase. Furthermore, the chromium occurrences changed with basicity. The chromium was produced in spinel crystals at lower basicity, but as the basicity increased to 3.0, the chromium precipitated as calcium chromate. In view of the relationship between the chromium leaching behavior and its occurrence, increasing basicity raised the Cr6+ leaching.

scholarly journals An overview of resource utilization of steel slag as absorbent material for waste water treatment

2020 ◽  
Vol 199 ◽  
pp. 00017
Author(s):  
Chan Yu ◽  
Wei Zhang ◽  
Fei Gao ◽  
Huawei Huang ◽  
Liangyuan Zhao
Keyword(s):  
Waste Water ◽  
Sustainable Development ◽  
Water Treatment ◽  
Resource Utilization ◽  
Rapid Development ◽  
Waste Water Treatment ◽  
Steel Slag ◽  
Research Progress ◽  
Utilization Rate ◽  
Comprehensive Utilization

With the rapid development of the steel industry, the accumulation of steel slag increases year by year, occupying a large amount of farm land and leading the problem of environmental pollution and safety hazards. The current comprehensive utilization rate of steel slag is still very low in China, far behind the developed countries. The low comprehensive utilization rate of steel slag is a stumbling block to the green and sustainable development of the Yangtze River Economic Belt. Improving the comprehensive utilization rate of steel slag is an imperative way to resolve these problems and to realize sustainable development for the steel enterprise. Steel slag presents porous structure and large surface area; in addition, it is easy to separate from water due to its high density. Therefore, the application of steel slag in industrial waste water treatment has received intensive attention in recent years. This paper systematically introduced the research progress of steel slag resource utilization as absorbent materials for waste water and proposed the important improved method and critical problems for steel slag as absorbent materials.

scholarly journals Effect of Basicity on Precipitation of Spinel Crystals in a CaO-SiO2-MgO-Cr2O3-FeO System

2019 ◽  
Vol 38 (2019) ◽  
pp. 867-872
Author(s):  
Jianli Li ◽  
Qiang Zeng ◽  
Qiqiang Mou ◽  
Yue Yu
Keyword(s):  
Crystal Size ◽  
Solid Phase ◽  
Spinel Phase ◽  
Steel Slag ◽  
Solid Particles ◽  
Particle Diffusion ◽  
Spinel Crystal ◽  
Stainless Steel Slag ◽  
Comprehensive Utilization ◽  
Key Factor

AbstractThe comprehensive utilization of stainless steel slag is one of major problems to be solved at “green steelworks”. Precipitation of spinel crystals can effectively detoxify residue. The effect of basicity defined by ω(CaO)/ ω(SiO2) ratio on precipitation of spinel crystals in a CaO-SiO2-MgO-Cr2O3-8 wt% FeO system has been determined with such tools as FactSage 7.1, SEM-EDS, IPP 6.0 and XRD. The FactSage 7.1 results showed that the rate of spinel phase enrichment with chromium was about 98% for the system basicity less than 1.4 and about 78% above this value. The precipitation of solid particles in solution appeared to be significantly influenced by basicity. With its increase the solid phase grew, the liquid one reduced, the particle diffusion was limited, and the growth of spinel crystals was inhibited. The spinel crystal size increased rapidly with decrease of basicity. When basicity increased from 0.6 up to 1.0, the crystal size decreased sharply from 12.30 μm down to 6.22 μm, and the reduction constituted as much as 49.43%. When basicity increased from 1.0 up to 2.2, the spinel crystal size moderately decreased from 6.22 μm down to 4.47 μm. Therefore, reduction of basicity is conducive to spinel crystal enrichment with chromium what appears to be a key factor to control basicity at detoxification of the chromium-containing steel slag.

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