Preparation process of cold bonded pellets with iron-bearing dust and sludge from steel production process

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI:10.1051/metal/2021077

Rui Mao, Fei Wang, Yuan Xu, Kun Ren, Guangwei Wang

引用次数: 3

Abstract

Blast furnace dust (BFD) and converter sludge (CS) were used as raw materials for preparing of cold bonded pellets (CBPs). The results showed that BFD contained high content of C, Fe and harmful element of Zn. Conversely, the CS had more Fe and Ca content and less Zn. BFD particles are mostly large and irregular in shape with poor hydrophilicity, whereas CS particles are generally smaller spherical and could bond together easily. Additionally, the main factors influencing the performance of CBPs are the binder, moisture, and pressing pressure. By controlling the mixing ratio of BFD and CS, selecting the appropriate binder and binder amount, and controlling the moisture and pressure, CBPs with a compressive strength and a falling strength of up to 142.7 N and 8.34 times, respectively, can be prepared, thus meeting the requirements of the rotary hearth furnace and the OxyCup production process.

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用炼钢过程中产生的含铁粉尘和污泥制备冷粘结球团的工艺

以高炉粉尘(BFD)和转炉污泥(CS)为原料制备冷粘结球团(CBPs)。结果表明，BFD中含有较高的C、Fe和有害元素Zn。相反，CS的铁和钙含量较高，锌含量较低。BFD颗粒大多较大，形状不规则，亲水性较差，而CS颗粒一般较小，呈球形，容易结合。此外，影响CBPs性能的主要因素是粘合剂、水分和压制压力。通过控制BFD与CS的混合比例，选择合适的粘结剂和粘结剂用量，控制水分和压力，可制得抗压强度和抗落强度分别高达142.7 N和8.34倍的CBPs，从而满足转底炉和OxyCup生产工艺的要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.