攀钢铁矿粉高温性能及优化配矿研究

胡鹏; 唐文博; 黄楚; 饶家庭; 杨明睿

doi:10.7513/j.issn.1004-7638.2022.03.019

攀钢铁矿粉高温性能及优化配矿研究

doi: 10.7513/j.issn.1004-7638.2022.03.019

1.
攀钢集团攀枝花钢铁研究院有限公司, 钒钛资源综合利用国家重点实验室, 四川攀枝花 617000
2.
攀钢集团西昌钢钒有限公司, 四川西昌 615000

详细信息

作者简介:
胡鹏（1988-），男，四川苍溪人，高级工程师，研究方向：钒钛矿造块及高炉冶炼， E-mail：hupeng526417@163.com

中图分类号: TF046
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- 被引次数: 0
出版历程
- 收稿日期: 2022-02-25
- 刊出日期: 2022-06-30

Study on high temperature properties and optimal ore blending of Pangang iron ore powder

1.
Panzhihua Iron and Steel Research Institute Co., Ltd., Pangang Group,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China
2.
Pangang Group Xichang Steel & Vanadium Co., Ltd., Xichang 615000, Sichuan, China

摘要

摘要: 通过微型烧结试验对攀钢铁矿粉高温性能进行了检测，结果表明攀钢所用高钛型钒钛磁铁矿同化温度达到1320 ℃以上，液相流动性指数仅0.1，粘结相强度大于3 500 N，需要通过优化配矿来改善烧结混匀矿性能。因此，根据高温性能进行了优化配矿，并开展了高温性能和烧结杯验证试验，结果表明：TiO₂含量对铁矿粉烧结高温性能影响较大。随着TiO₂含量从7.0%降低至3.0%时，混匀矿的同化温度从1305 ℃降低至1280 ℃，液相流动性指数从0.42提高至0.78，粘结相强度则从2 640 N降低至1 915 N，烧结矿成品率、转鼓强度和中低温性能显著提高，且烧结过程中TiO₂与CaO反应生成的结构致密、熔点较高的钙钛矿物相减少，铁酸钙物相增加。
- 钒钛磁铁矿 /
- 烧结 /
- 配矿 /
- 高温性能
Abstract: The results from micro sintering test on high temperature properties of Pangang iron ore power show that the assimilation temperature of high V-Ti magnetite used in Pangang exceeds 1 320 ℃, while the liquid phase fluidity index is only 0.1 and the bonding phase strength is greater than 3 500 N. It is necessary to improve the performance of sinter blending by optimizing ore blending. Therefore, the ore blending was optimized based on high temperature performance, and the sintering verification tests had been conducted. It is found out that the content of TiO₂ has a great influence on the high temperature sintering properties of iron ore powder. When TiO₂ content decreases from 7.0% down to 3.0%, the assimilation temperature of mixed ore decreases from 1 305 ℃ to 1 280 ℃, the liquid phase fluidity index is increased from 0.42 to 0.78, and the bonding phase strength decreases from 2 640 N to 1 915 N. The sinter yield, drum strength, and medium and low temperature properties are significantly improved. During the sintering process, the calcium titanium mineral phase with dense structure and high melting point formed by the reaction of TiO₂ and CaO decreases, and the calcium ferrite phase increases.
- vanadium-bearing titanomagnetite /
- sinter /
- ore blending /
- high temperature properties

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图 1 铁矿粉同化温度测定试验示意

Figure 1. Schematic diagram of determination test on iron ore powder assimilation temperature

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图 2 铁矿粉液相流动性试验示意

Figure 2. Schematic diagram of iron ore powder liquid phase fluidity test

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图 3 铁矿粉粘结相强度试验示意

Figure 3. Schematic diagram of iron ore powder bond phase strength test

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图 4 铁矿粉同化性试验结果

Figure 4. Assimilation test results of iron ore powder

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图 5 铁矿粉的液相流动性指数

Figure 5. Liquid phase fluidity index of iron ore powder

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图 6 铁矿粉的粘结相强度

Figure 6. Bond phase strength of iron ore powder

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图 7 混匀矿同化温度和液相流动性指数随TiO₂含量变化规律

Figure 7. Variation of assimilation temperature and liquid phase fluidity of mixed ore with TiO₂ content

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图 8 混匀矿粘结相强度和综合得分随TiO₂含量变化规律

Figure 8. Variation of bond phase strength and comprehensive score of mixed ore with TiO₂ content

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图 9 不同配矿方案下烧结矿矿物形貌

Figure 9. Mineral morphology of sinters obtained from different ore blending schemes

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表 1 试验用原料化学成份和烧损

Table 1. Chemical compositions and burning loss of raw iron ore for test

矿粉名称	化学成分/%								Ig/%
矿粉名称	TFe	FeO	CaO	SiO₂	MgO	Al₂O₃	TiO₂	V₂O₅	Ig/%
攀精矿	53.90	32.55	0.40	3.80	2.80	3.80	12.25	0.56	−1.36
白马精矿	56.36	27.30	0.37	3.79	3.36	3.28	10.51	0.71	−1.50
南非矿	62.21	0.72	0.27	6.22	0.05	1.91			2.00
国高粉	59.61	17.69	2.42	4.36	3.80	0.86	0.50		3.00
中粉	44.03	2.64	2.29	20.82	1.62	5.33	0.30	0.04	4.32

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表 2 铁矿粉配矿试验方案

Table 2. Iron ore powder blending test scheme

配矿方案	矿粉比例/%
配矿方案	攀精矿	南非矿	国内高粉	国内中粉
JZ	56	10	23	11
S1	47.5	10	32	10.5
S2	39	10	40.5	10.5
S3	30.5	10	49.5	10
S4	22	10	58.5	9.5

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表 3 混匀矿化学成分检测结果

Table 3. Chemical compositions of mixed ore

配矿方案	化学成分/%
配矿方案	TFe	SiO₂	CaO	MgO	Al₂O₃	V₂O₅	TiO₂
JZ	54.96	6.04	1.06	2.63	3.10	0.32	7.00
S1	55.52	6.01	1.23	2.72	2.83	0.27	6.01
S2	56.01	6.06	1.40	2.81	2.58	0.22	5.01
S3	56.57	6.02	1.58	2.90	2.31	0.17	4.01
S4	57.13	5.99	1.75	3.00	2.04	0.13	3.00

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表 4 烧结矿性能检测结果

Table 4. Sinter performance test results

配矿方案	成品率/%	转鼓强度/%	利用系数/[t·(m²·h)⁻¹]	RDI_{(+3.15 mm)}/%	RI/%
JZ	70.75	52.60	1.442	54.37	86.77
S1	75.91	56.27	1.437	55.92	87.15
S2	79.35	58.27	1.360	57.39	87.72
S3	85.78	61.53	1.391	61.80	88.50
S4	85.43	63.13	1.622	62.80	90.87

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表 5 典型烧结矿物相体积分数组成

Table 5. Volume fractions of typical sintered mineral phases

矿物方案	矿物组成/%
矿物方案	钛赤铁矿	钛磁铁矿	铁酸钙	钙钛矿	镁铝尖晶石	硅酸盐
JZ	18～22	23～27	19～23	7～11	0～2	22～26
S2	18～21	24～27	25～30	5～9	0-2	20～23
S4	16～20	24～28	28～32	2～6	0～2	16～20

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