辽西钒钛磁铁矿氧化球团制备实验

韩通; 肖顺鑫; 程功金; 杨合; 薛向欣

doi:10.3969/j.issn.1000-6532.2023.03.002

辽西钒钛磁铁矿氧化球团制备实验

东北大学冶金学院，辽宁　沈阳　110819

基金项目: 国家自然科学基金辽宁联合基金项目（U1908226）；国家自然科学基金青年基金项（21908020）

详细信息

作者简介: 韩通（1995-），男，硕士研究生，从事炼铁工艺研究

通讯作者: 薛向欣（1954-），男，博士，教授，研究方向为钢铁冶炼。

中图分类号: TD981

收稿日期: 2021-06-22

刊出日期: 2023-06-25

Preparation of Vanadium Titano-Magnetite Oxide Pellets from Western Liaoning Province

School of Metallurgy, Northeastern University, Shenyang, Liaoning, China

More Information

Corresponding author: Xue Xiangxin, xuexx@mail.neu.edu.cn

Received Date: 22 June 2021

Publish Date: 25 June 2023

摘要

摘要:
这是一篇冶金工程领域的论文。以辽西钒钛磁铁精矿为原料制备球团，研究球团的预热特性和焙烧特性。结果表明，在900 ℃下预热15 min，预热球强度可达819 N；在较佳预热制度下，1100 ℃焙烧15 min，焙烧球强度达到了3020 N。该球团不难氧化，在900 ℃、15 min下，其氧化度达97%，且温度对氧化度的影响强于时间。随预氧化温度的提高，球团物相由磁铁矿和钛铁矿最终转变为赤铁矿和铁板钛矿。随着焙烧温度的提高，球团内晶体不断长大，气孔减少，结构更致密。
- 冶金工程 /
- 钒钛磁铁矿 /
- 氧化球团 /
- 预热 /
- 焙烧 /
- 抗压强度
Abstract:
This is a paper in the field of metallurgical engineering. Pellets were prepared from vanadium and titanium magnetite concentrates from Liaoxi, and the preheating characteristics and roasting characteristics of the pellets were studied. Results show that the strength of preheating ball can reach 819 N when preheating for 15 min at 900℃, and the strength of the ball reached 3020 N at 1100℃ for 15 min under the optimum preheating system. The oxidation degree of the pellet is 97% at 900℃ for 15 min, and the temperature has a stronger influence on the oxidation degree than time.With the increase of oxidation temperature, with the increase of preoxidation temperature, magnetite in the pellets changes into hematite and ilmenite into ferrobrookite. With the increase of calcination temperature, the crystal in pellet grows up, the porosity decreases and the structure becomes denser.
- Metallurgical engineering /
- Vanadium titano-magnetite /
- Oxidized pellets /
- Preheat /
- Roasting /
- Compressive strength

HTML全文

图 1 钒钛磁铁精矿XRD

Figure 1.

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图 2 预热温度与预热球强度的关系

Figure 2.

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图 3 预热时间与预热球强度的关系

Figure 3.

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图 4 预热球团的微观结构

Figure 4.

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图 5 焙烧温度与焙烧球强度的关系

Figure 5.

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图 6 焙烧时间与焙烧球强度的关系

Figure 6.

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图 7 预热温度和时间对球团氧化度的影响

Figure 7.

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图 8 不同氧化温度下球团的XRD

Figure 8.

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图 9 不同焙烧温度下球团的微观结构

Figure 9.

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图 10 不同焙烧时间下球团的矿相组成

Figure 10.

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表 1 钒钛磁铁矿的主要化学成分/%

Table 1. Chemical compositions of raw materials

TFe V FeO MgO CaO SiO₂ Al₂O₃ TiO₂

43.62 0.97 17.58 0.57 4.17 7.19 1.87 21.92

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表 2 膨润土的主要化学成分/%

Table 2. Chemical composition of binder

SiO₂ CaO MgO Al₂O K₂O Na₂O

44.88 4.08 2.88 12.88 1.03 4.18

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