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| Research and Practical Exploration on Cost Reduction and Efficiency Improvement of Iron Ore Raw Material Proportioning Design for Iraq's 6 000t/d Cement Clinker Production Line |
| LIANG Xuefeng, WANG Tie
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1 China Hydropower Fourth Engineering Bureau Co., Ltd. , Xining Qinghai 810007, China; 2 China Power Construction Corporation Overseas Investment Co., Ltd. , Beijing 100048, China
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Abstract Taking the 6 000t/d cement clinker production line of DCCP in Iraq as the research object, in view of the problems that the project's iron ore relies on imports from Turkey and Iran, with long transportation distances (about 323km and 281km respectively), high costs (average 75 US dollars /t), and unstable supply affected by seasons, the practice of reducing costs and increasing efficiency in the proportioning design of iron ore raw materials is carried out. By changing the traditional approach of solely relying on iron ore to meet the aluminum ratio in cement production, a proportioning scheme of "high-alumina clay + low-alumina clay" (in a ratio of 5:1) was adopted, with a reduction in iron ore usage. Combined with the physical properties and chemical composition analysis of raw materials, a series of tests such as grindability and flammability were carried out to optimize the proportioning parameters. The results show that after the commissioning, the average daily consumption of iron ore decreased by 0.11%, and the net savings in the annual comprehensive cost were 151 600 US dollars. The content of C4AF in clinker increased from 10.46% to 12.56%, effectively reducing the generation of fly sand during clinker calcination. Moreover, the compressive strengths of clinker at 2d and 28d increased by 3MPa and 2.5MPa respectively, and the quality met the EU cement standard (BS EN197-1:2011). This project is constructed overseas using Chinese technology, standards and equipment, providing a feasible technical reference solution for reducing raw material costs and improving efficiency for similar cement projects along the Belt and Road.
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Received: 11 August 2025
Published: 25 January 2026
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