金属铬冶炼及铬收率的影响因素研究

叶明峰; 师启华; 余彬; 陈海军

doi:10.7513/j.issn.1004-7638.2021.03.016

金属铬冶炼及铬收率的影响因素研究

doi: 10.7513/j.issn.1004-7638.2021.03.016

叶明峰^{1, 2,},
师启华^{1, 2},
余彬^{1, 2},
陈海军^{1, 2}

1.
攀钢集团研究院有限公司，四川攀枝花 617000
2.
钒钛资源综合利用国家重点实验室，四川攀枝花 617000

详细信息

作者简介:
叶明峰（1992—），湖北黄冈人，硕士，工程师，主要从事粉状物料造块及钒铬资源火法冶金方面的研究，E-mail：csuymf@163.com

中图分类号: TF791
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- 被引次数: 0
出版历程
- 收稿日期: 2020-12-05
- 刊出日期: 2021-06-10

Metal chromium preparation and the factors influencing chromium yield

Ye Mingfeng^{1, 2
,},
Shi Qihua^{1, 2},
Yu Bin^{1, 2},
Chen Haijun^{1, 2}

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

摘要

摘要: 研究了攀钢自产高纯三氧化二铬冶炼98级金属铬的配料参数和铬收率的影响因素。结果表明：配加的还原剂金属铝会有一部分进入到产物金属铬中，为确保金属铬成分会间接限制铬收率的提高；金属铬冶炼过程较优的参数为单位炉料热量取值为3150 kJ/kg、配铝系数为0.96；添加氧化钙能显著提高铬元素收率，在CaO/Cr₂O₃为0.125时，铬收率最高为89.24%。采用攀钢自产高纯三氧化二铬可以冶炼出含V约0.043%的JCr98级金属铬，可满足下游用户的个性化要求。
- 金属铬 /
- 三氧化二铬 /
- 杂质 /
- 收率 /
- 分配规律
Abstract: In this paper the burden parameters and influencing factors of chromium yield in preparing Grade 98 metal chromium with high purity chromium trioxide were studied. The results showed that part of the added reducing agent metal aluminum will enter the product metal chromium. In order to satisfy with composition requirements for metal chromium, the improvement of chromium yield will be limited indirectly. The optimal parameters of chromium smelting process are as follows: unit charge heat value is 3150 kJ/kg and aluminum distribution coefficient is 0.96. When CaO/Cr₂O₃ is 0.125, the highest chromium yield of 89.24% can be obtained is.The high-purity chromium trioxide produced by Panzhihua Iron and Steel Co. can be used to smelt JCr98 metal chromium containing 0.043% vanadium, which can meet the personalized requirements of downstream users.The high-purity chromium trioxide produced by Panzhihua Iron and Steel Co. can be used to smelt JCr98 metal chromium containing 0.043% vanadium, which can meet the personalized requirements of downstream users.
- metal chromium /
- chromium trioxide /
- impurity /
- yield /
- distribution ratio

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图 1 铝热法冶炼金属铬流程

Figure 1. Process flow of metal chromium by aluminothermic

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图 2 Cr₂O₃-Al₂O₃二元相图

Figure 2. Phase diagram of Cr₂O₃-Al₂O₃

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图 3 Cr₂O₃-Al₂O₃-CaO三元相图

Figure 3. Phase diagram of Cr₂O₃-Al₂O₃-CaO

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图 4 单位炉料热量对元素分配规律的影响

Figure 4. Effect of heat per unit charge on element distribution

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图 5 配铝系数对元素分配规律的影响

Figure 5. Effect of aluminum addition coefficient on element distribution

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图 6 石灰用量对元素分配规律的影响

Figure 6. Effect of CaO/Cr₂O₃ on element distribution

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图 7 CaO/Cr₂O₃分别为0.062 5和0.125时的冶炼情况

Figure 7. Smelt products with CaO/Cr₂O₃=0.062 5 and 0.125

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图 8 炉渣成分的三元相图

Figure 8. Ternary Phase diagram of slag

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图 9 铝铬渣的微观结构分析

（a、c为不含氧化钙的铝铬渣的显微照片；b、d为含氧化钙的铝铬渣的显微照片）

Figure 9. Microstructure of aluminum chromium slag

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表 1 主要原料和目标产品的化学成分

Table 1. Chemical compositions of main raw materials and target products %

项目	Cr₂O₃	TFe	SiO₂	V₂O₅	Cr	Cu	Si	P	S	Al
氧化铬	96.85	<0.1	<0.1	0.56				<0.01	0.019
铝粉								<0.1	0.003	99.70
国标JCr98					≥98	≤0.06	≤0.40	≤0.01	≤0.03	≤0.80

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表 2 铝铬渣的点成分分析

Table 2. Compositions of aluminum chromium slag indicated in Figure 9

能谱点	Al	Cr	O	Ca	Na	Si
c-Spectrum1	0.66	93.83
c-Spectrum2	57.88	1.39	40.74
c-Spectrum3	46.92	14.67	37.85
d-Spectrum1	0.65	98.31
d-Spectrum2	49.86	1.63	39.09	6.77
d-Spectrum3	36.09	1.20	36.08	28.56	0.59	1.30

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表 3 合格金属铬产品的成分分析

Table 3. composition analysis of chromium metal %

炉次	元素成分/%
炉次	Cr	Al	Si	S	P	V
202001	98.24	0.78	0.038	0.005	0.01	0.031
202002	98.31	0.51	0.025	0.004	0.02	0.045

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