Influence of biocoke on iron ore sintering performance and strength properties of sinter

IF 2.8 Q2 MINING & MINERAL PROCESSING Mining of Mineral Deposits Pub Date : 2022-06-30 DOI:10.33271/mining16.02.055
L. Kieush, A. Koveria, M. Boyko, Maksym Yaholnyk, A. Hrubiak, L. Molchanov, V. Moklyak
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引用次数: 8

Abstract

Purpose. The research purpose is to substantiate the use of biocoke as a fuel in the iron ore sintering, as well as its influence on the performance and properties of the resulting sinter. To completely replace conventional coke breeze, biocoke is produced using 5 wt.% biomass wood pellets at different carbonization temperatures of 950 or 1100°C. Further, the influence of biocoke on the sintering process and the sinter quality is studied at a high proportion of biomass pellets of 10, 15, 30, 45 wt.% and a carbonization temperature of 950°C. Methods. Carbonization is performed in shaft-type electric furnaces to produce laboratory coke or biocoke. Afterward, the sintering of iron ores is conducted on a sinter plant. To assess the sintering process and the quality of the resulting sinter, the filtration rate is determined on a laboratory sinter plant using a vane anemometer designed to measure the directional flow average velocity under industrial conditions. The sinter reducibility is studied using a vertical heating furnace to assess the effect of coke and biocoke on the sinter’s physical-chemical properties. Findings. It has been determined that biocoke, carbonized at a temperature of 950°C, has good prospects and potential for a shift to a sustainable process of iron ore sintering. Originality. It has been proven that biocoke with a biomass pellet ratio of up to 15 wt.%, obtained at a temperature of 950°C, does not affect the parameters characterizing the sintering process. The sinter strength indicators correspond to the use of 100 wt.% conventional coke breeze. Biocoke used with a high proportion of biomass pellets of 30 and 45 wt.% causes a deterioration in the sinter quality. Practical implications. The results of using biocoke with the addition of 5-15 wt.% biomass pellets and at a temperature of 950°C are within the standard deviation, which makes it possible to use biocoke with 15 wt.% biomass pellets instead of industrial coke breeze.
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生物焦对铁矿石烧结性能及烧结矿强度性能的影响
目的。研究的目的是证实生物焦作为燃料在铁矿石烧结中的使用,以及它对烧结矿性能和性能的影响。为了完全取代传统的焦炭,在950或1100°C的不同碳化温度下,使用5wt .%的生物质木屑颗粒生产生物焦。此外,在生物质球团添加量为10、15、30、45 wt.%,炭化温度为950℃的条件下,研究了生物炭对烧结过程和烧结质量的影响。方法。碳化是在轴式电炉中进行的,以生产实验室焦或生物焦。然后,在烧结厂对铁矿石进行烧结。为了评估烧结过程和最终烧结矿的质量,在实验室烧结厂使用用于测量工业条件下定向流动平均速度的叶片风速计来确定过滤速率。采用立式加热炉对烧结矿的还原性进行了研究,考察了焦炭和生物焦对烧结矿理化性质的影响。发现。在950°C的温度下碳化的生物焦具有良好的前景和潜力,可以转变为铁矿石烧结的可持续过程。创意。经证明,在950℃温度下获得的生物质颗粒比高达15 wt.%的生物焦,不影响表征烧结过程的参数。烧结强度指标对应于使用100wt .%常规焦炭微风。使用生物炭时,生物质颗粒的比例高达30%和45%,会导致烧结质量的恶化。实际意义。在950℃的温度下,添加5-15 wt.%生物质颗粒的生物炭的使用结果在标准偏差范围内,这使得使用15 wt.%生物质颗粒的生物炭代替工业焦渣成为可能。
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来源期刊
Mining of Mineral Deposits
Mining of Mineral Deposits MINING & MINERAL PROCESSING-
CiteScore
5.20
自引率
15.80%
发文量
52
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