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Volume 15 Issue 5
Oct.  2024
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QIU Zairong, PENG Changhong, ZHOU Kanggen, CHEN Wei. Current situation and prospect of comprehensive utilization of titanium white iron resources by sulfuric acid process[J]. Nonferrous Metals Science and Engineering, 2024, 15(5): 758-764. DOI: 10.13264/j.cnki.ysjskx.2024.05.016
Citation: QIU Zairong, PENG Changhong, ZHOU Kanggen, CHEN Wei. Current situation and prospect of comprehensive utilization of titanium white iron resources by sulfuric acid process[J]. Nonferrous Metals Science and Engineering, 2024, 15(5): 758-764. DOI: 10.13264/j.cnki.ysjskx.2024.05.016
shu

Current situation and prospect of comprehensive utilization of titanium white iron resources by sulfuric acid process

  • School of Metallurgy and Environment, Central South University, Changsha410083,China

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  • Received Date: October 17, 2023
  • Revised Date: November 22, 2023
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    • Abstract

  • During the production of titanium dioxide by sulfuric acid method, by-products containing a large amount of iron resources, such as ferrous sulfate heptahydrate slag and waste acid, are generated, For every 1.0 ton of titanium dioxide produced, approximately 5.0 m3 of free sulfuric acid and 4.0 ton of by-product ferrous sulfate are produced. The iron resources in these two types of waste have high utilization value. Currently, a mere fraction of the ferrous sulfate heptahydrate slag has undergone comprehensive repurposing, while the majority languishes in storage. Meanwhile, the waste acid is primarily used for lime neutralization, a procedure that not only results in the squandering of significant iron resources but also poses a substantial environmental risk. Based on the total amount of titanium dioxide resources and their distribution characteristics in the sulfuric acid process, this work clarifies that the utilization of iron-based resources is the bottleneck to restricting its clean production, and proposes a method for using iron resources in ilmenite to prepare battery-grade iron phosphate and iron-based pigments. With the new idea, the high-value utilization of titanium dioxide waste acid and by-product ferrous sulfate slag can be achieved, and its feasibility has been systematically analyzed.

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