Benefits of using steel slag in cement clinker production for environmental conservation and economic revenue generation

Gao Tianming; Dai Tao; Shen Lei; Jiang Li

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Benefits of using steel slag in cement clinker production for environmental conservation and economic revenue generation

机译：使用钢渣在水泥熟料生产中使用钢渣进行环境保护和经济收入

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Steel slag, the most discharged metallurgical slag in China, is rarely applied in the production of clinkers. The aim of this study is to analyze the maximum substitution amount of steel slag in raw meal and calculate the resources required as well as the environmental and economic benefits of the addition. Numerical studies show that 14.30% was the maximum amount of steel slag added to the raw meal, and this was mainly determined by its Fe2O3 content. Pilot runs revealed that the quality indices of the currently used iron ore-based raw meal cannot be transferred to steel-slag-based feeds because the physical properties of the latter induce several technical problems during the production process. However, by implementing optimized quality indices and operational processes, the plant was able to produce a steel slag clinker with excellent performance, whose indicators all met the national standard requirements. It is possible to substitute all the iron ore (26.35-125.42 kg/t) and part of the limestone (34.40-160.02 kg/t) with increasing amounts of steel slag (from 43.04 to 202.26 kg/t). Using steel slag also led to an additional reduction in energy consumption (2.32-11.38 kg/t). Lessened limestone dissociation and lowered sintering temperatures can also help decrease the process and fuel emissions by up to 72.28 kg/t and 24.16 kg/t, respectively. Moreover, the use of steel slag can decrease raw meal cost by up to 0.82 USD/t compared to using iron ore and potentially increase annual earnings up to 2.37 MUSD/a for a 2500 t/d cement plant. (C) 2020 Elsevier Ltd. All rights reserved.

机译：钢渣是中国最排出的冶金渣，很少应用于熟料的生产。本研究的目的是分析原始膳食中钢渣的最大替代量，并计算所需的资源以及添加的环境和经济效益。数值研究表明，14.30％是加入原料膳食的最大钢渣量，这主要由其Fe2O3含量决定。试点透露，目前使用的铁矿石的原料膳食的质量指标不能转移到基于钢渣的饲料，因为后者的物理性质在生产过程中诱导了几个技术问题。然而，通过实施优化的质量指标和运营过程，该工厂能够生产具有优异性能的钢渣熟料，其指标全部符合国家标准要求。可以用钢渣的增加（43.04至202.26kg / t）替换所有铁矿石（26.35-125.42 kg / t）和一部分石灰石（34.40-160.02 kg / t）。使用钢渣也导致能耗降低（2.32-11.38 kg / t）。减少的石灰岩解离和降低的烧结温度也可以帮助将过程和燃料排放量减少至多72.28kg / t和24.16 kg / t。此外，与使用铁矿石相比，使用钢渣可以将原始膳食降低至0.82美元/吨，并且可能会增加2500吨/迪水泥厂的2.37 Musd / A的年度收益。（c）2020 elestvier有限公司保留所有权利。

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《Journal of Cleaner Production》 |2021年第1期|124538.1-124538.11|共11页
作者
Gao Tianming; Dai Tao; Shen Lei; Jiang Li;
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作者单位

Chinese Acad Geol Sci Inst Mineral Resources MNR Key Lab Metallogeny & Mineral Assessment Beijing 100037 Peoples R China|Chinese Geol Survey Res Ctr Strategy Global Mineral Resources Beijing 100037 Peoples R China|Chinese Acad Sci Inst Geog Sci & Nat Resources Res IGSNRR Beijing 100101 Peoples R China;

Chinese Acad Geol Sci Inst Mineral Resources MNR Key Lab Metallogeny & Mineral Assessment Beijing 100037 Peoples R China|Chinese Geol Survey Res Ctr Strategy Global Mineral Resources Beijing 100037 Peoples R China;

Chinese Acad Sci Inst Geog Sci & Nat Resources Res IGSNRR Beijing 100101 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

Chinese Acad Geol Sci Inst Mineral Resources MNR Key Lab Metallogeny & Mineral Assessment Beijing 100037 Peoples R China|Chinese Geol Survey Res Ctr Strategy Global Mineral Resources Beijing 100037 Peoples R China;

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原文格式 PDF
正文语种 eng
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关键词
Clinker production; Resource conservation; Emission reduction; Steel slag;

机译：熟料生产;资源保护;减排;钢渣;

Benefits of using steel slag in cement clinker production for environmental conservation and economic revenue generation

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