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Christopher Koroneos - One of the best experts on this subject based on the ideXlab platform.

  • utilization of steel slag for portland Cement Clinker production
    Journal of Hazardous Materials, 2008
    Co-Authors: P E Tsakiridis, G D Papadimitriou, Sotiris Tsivilis, Christopher Koroneos
    Abstract:

    Abstract The aim of the present research work is to investigate the possibility of adding steel slag, a by-product of the conversion of iron to steel process, in the raw meal for the production of Portland Cement Clinker. Two samples of raw meals were prepared, one with ordinary raw materials, as a reference sample ((PC) Ref ), and another with 10.5% steel slag ((PC) S/S ). Both raw meals were sintered at 1450 °C. The results of chemical and mineralogical analyses as well as the microscopic examination showed that the use of the steel slag did not affect the mineralogical characteristics of the so produced Portland Cement Clinker. Furthermore, both Clinkers were tested by determining the grindability, setting times, compressive strengths and soundness. The hydration products were examined by XRD analysis at 2, 7, 28 and 90 days. The results of the physico-mechanical tests showed that the addition of the steel slag did not negatively affect the quality of the produced Cement.

Lu Pu-guan - One of the best experts on this subject based on the ideXlab platform.

  • Research Progress of Calcinating Cement Clinker with Solid Waste
    Bulletin of the Chinese ceramic society, 2014
    Co-Authors: Lu Pu-guan
    Abstract:

    Disposing solid wastes by using rotary kiln is a widely used and obviously effect way,there were more than thirty years since western countries began to study the feasibility of calcinating Cement Clinker by solid waste. In China,as problems among resources,environment and development became more and more prominent in recent decades,people began to pay attention to the study of calcinating Cement Clinker by solid waste,calcinating Cement Clinker by solid wastes not only saves raw materials,it can also destroy the poisonous and harmful substances in the waste, however, in the study and application of this field,there is still a certain gap between our country and developed countries. The paper reviewed the research status of calcinating Cement Clinker by solid,such as metallurgical residue, waste concrete,incineration bottom ash and sludge,problems of using solid waste to produce Cement Clinker were introduced,and suggestions for research in the future were also put forward.

Yuyang Zhou - One of the best experts on this subject based on the ideXlab platform.

  • Addition of large amount of municipal sewage sludge as raw material in Cement Clinker production.
    Environmental Science and Pollution Research, 2017
    Co-Authors: Minrui Huang, Na Li, Dongsheng Shen, Huajun Feng, Yuyang Zhou
    Abstract:

    Two addition modes were used to explore the maximum addition of municipal sewage sludge as a raw material in Cement Clinker production. The Clinker and Cement product quality were determined by chemical analysis, Cement quality testing, characterization of the Clinker crystalline phases, and leaching tests. Municipal sewage sludge addition in the raw mix could be up to 30% based on the Cement Clinker moduli, and the Cement quality met the P.O 42.5 Cement standard (GB 175-2007). The amount of municipal sewage sludge added based on the direct addition mode should be less than 15% because of an insufficient early-term Cement strength (third day). The leaching concentrations of heavy metals in all Cements were below the threshold (GB 30760-2014) using the latest leaching procedure (GB 30810-2014). The municipal sewage sludge could be used with a high addition (30%) in the raw mix as a raw material in Cement Clinker production.

Yaowu Wei - One of the best experts on this subject based on the ideXlab platform.

  • Corrosion and adherence properties of Cement Clinker on porous periclase-spinel refractory aggregates with varying spinel content
    Ceramics International, 2017
    Co-Authors: Xiao Li Lin, Wen Yan, Qing Jie Chen, Bingqiang Han, Yaowu Wei
    Abstract:

    Abstract The corrosion and adherence properties of Cement Clinker on porous periclase-spinel refractory aggregates with varying spinel content were examined using a static crucible test and a sandwich test, respectively. The reaction characteristics of porous periclase-spinel aggregates and Cement Clinker and the effects of spinel content on the adherence property were investigated through scanning electron microscope (SEM), energy dispersive spectrometer (EDS), and FactSage ® thermo-chemical software. It was observed that the spinel content and pore characteristics strongly affected the corrosion results and thus affected the adherence ability of Cement Clinker on porous periclase-spinel aggregates. With an increase in the spinel content, the amount of glass phase formed from the reaction of the refractory and Cement Clinker increases because the rate of the spinel dissolution into the Cement Clinker is higher than that of periclase. The glass phase acts as a bridge between the Cement Clinker and the aggregate to enhance the adherence property, which depends on the amount, area distribution and viscosity of the glass phase and its penetration in aggregates. When the spinel content is 15–40 wt%, the refractory aggregate not only has a high Cement Clinker resistance but also a high adherence property. Once the spinel content exceeds 50 wt%, the skeletal structure of the aggregate will be destroyed, which will lead to a substantial decline in the Cement Clinker resistance.

Ya Li Wang - One of the best experts on this subject based on the ideXlab platform.

  • Calculation of Forming Heat of Cement Clinker Made from Calcium Carbide Slag
    DEStech Transactions on Materials Science and Engineering, 2017
    Co-Authors: Ya Li Wang, Su Ping Cui, Gui-ping Tian, Ming-zhang Lan
    Abstract:

    Calcium carbide slag can be a substitute for the natural limestone to produce Cement Clinker and also with a high portion of CaO as an excellent calcium raw material. Thus, it not only reduces the pollution that the calcium carbide slag brings to the environment, but also reduces the exploitation of non-renewable resource-limestone. The main mineral constituent of calcium carbide slag is Ca(OH)2,and there are many differences in decomposition temperatures between the calcium containing raw materials. When calcium carbide Slag is added, the forming process of Cement Clinker and the major reactions happened in that process changes. The empirical equation for calculating forming heat of Cement Clinker made of limestone is no longer applied for those made of calcium carbide slag. In this paper, the empirical equation for forming heat calculation of calcium carbide slag added Cement Clinker is researched and rebuilt under the principles of thermodynamics. Results show that the change of raw materials has a great influence on the forming heat of Cement Clinker. When the traditional raw materials are replaced by calcium carbide slag, the forming heat of Cement Clinker will be reduced. Calculating the forming heat by the revised empirical equation can help reduce errors and make calculation results near the reality and then convenient for evaluation of heat efficiency. The work provides some theoretical underpinnings for the process analysis and calculation of forming heat of Cement Clinker made from calcium carbide slag.

  • Utilization of Municipal Sludge in the Calcination of Cement Clinker
    Materials Science Forum, 2015
    Co-Authors: Qi Gang Zhao, Zuo Ren Nie, Hong Liu, Su Ping Cui, Ya Li Wang
    Abstract:

    Using the sludge of sewage treatment plant to calcine Cement Clinker is a new method and is confirmed on the international to utilize city sludge recycling and harmlessly. In this work the test of the raw material burnability, Cement Clinker mineral composition and petrographic analysis were used to study microscopic characteristics of Clinker, to analysis of the effect of sludge performance of Cement Clinker calcination. It was found that when sludge were as a raw material for calcining Cement Clinker, best city sludge content was around 15% ~ 20%. With an improvement of lime saturation coefficient, the burnability of raw material declined. The mineral composition of sludge Clinker was the same as that of the conventional Portland Clinker, while mineral structure and morphology of the sludge Clinker were better.

  • Theoretical Calculation and Experimental Study on the Forming Heat of Cement Clinker Made from Steel Slag
    Materials Science Forum, 2015
    Co-Authors: Ya Li Wang, Su Ping Cui, Gui-ping Tian, Ming-zhang Lan, Zhi Hong Wang
    Abstract:

    When steel slag, a by-product of steel making in impurity catching process, is added, the forming process of Cement Clinker and the major reactions in that process are changed. Since there are dramatic differences between the chemical components and mineral compositions of steel slag and that of natural Cement raw materials, the empirical equation for the calculating forming heats of Cement Clinker made of limestone and clay is no longer applied for those made of steel slag. In this paper, the empirical equation for forming heat calculation of steel slag added Cement Clinker was promoted, and testified by acid dissolution experiments. Results showed that the change of raw materials had great influence on the forming heat of Cement Clinker. When the traditional raw materials were replaced with steel slag, the forming heat of Cement Clinker reduced. Calculating the forming heat by our revised empirical equation can help reduce errors and bring great convenience for the calculation and evaluation of heat efficiency. This research provides theoretical underpinning for the study and calculation of forming heat of steel slag added Cement Clinker.