Method for preparing titanium solution by wet-processing on vanadium-titanium magnetite concentrates

A kind of vanadium titanomagnetite concentrate, wet processing technology

Active Publication Date: 2013-09-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the vast majority of titanium dioxide industries in the world use titanium slag and titanium concentrate as raw materials to prepare titanium liquid, and the widely used sulfuric acid method and chloride method prepare titanium liquid with high impurity content and complicated purification process. question
However, the method of preparing high-purity titanium liquid with vanadium-titanium magnetite concentrate as raw material is rarely reported, because the titanium content in the vanadium-titanium magnetite concentrate is low (about half of the titanium content in the titanium concentrate), and impurities The content is high, and it is difficult to prepare high-purity titanium liquid as a raw material

Method used

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  • Method for preparing titanium solution by wet-processing on vanadium-titanium magnetite concentrates
  • Method for preparing titanium solution by wet-processing on vanadium-titanium magnetite concentrates
  • Method for preparing titanium solution by wet-processing on vanadium-titanium magnetite concentrates

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The vanadium-titanium magnetite concentrate is leached in a closed container with 30% hydrochloric acid at 150°C. The liquid-solid ratio of hydrochloric acid to the concentrate is 2:1. The liquid-solid ratio of the leaching residue is 10:1, 80°C, 20min). Washing slag and NaOH are mixed at a ratio of 1:5 and then added to a stainless steel reactor for molten salt decomposition reaction at a reaction temperature of 550°C for 5 hours to obtain a molten salt reaction material. The molten salt reaction material is washed with water (temperature 70°C, time 90min, washing liquid to solid ratio 10:1), and then pickled (sulfuric acid concentration 100g / L, temperature 70°C, time 90min, pH value of the pickling slurry is 6.7) . The pickling material is acid-dissolved with 400g / L sulfuric acid at 90°C for 3 hours to obtain the acid-dissolved material, and the liquid-solid ratio of the sulfuric acid solution to the pickling material is 1:1. Add the acid-dissolved material to 200g / ...

Embodiment 2

[0041] The vanadium-titanium magnetite concentrate is leached in a closed container with 10% hydrochloric acid at 130°C. The liquid-solid ratio of hydrochloric acid to the concentrate is 10:1. The liquid-solid ratio of the leaching residue is 5:1, 80°C, 30min). Washing slag and NaOH are mixed at a ratio of 1:0.5 and then added to a stainless steel reactor for molten salt decomposition reaction. The reaction temperature is 550°C and the time is 1h to obtain molten salt reaction material. The molten salt reaction material is washed with water (temperature 30°C, time 60min, washing solution to solid ratio 5:1), and then pickled (sulfuric acid concentration 80g / L, temperature 30°C, time 60min, pH value of the pickling slurry is 3.2) . The pickling material is acid-dissolved with 500g / L sulfuric acid at 40°C for 3 hours to obtain the acid-dissolved material. The liquid-solid ratio of the sulfuric acid solution to the pickling material is 0.6:1. Add the acid-dissolved material to ...

Embodiment 3

[0046]The vanadium-titanium magnetite concentrate is leached with 20% hydrochloric acid at 110°C under normal pressure. The liquid-solid ratio of hydrochloric acid and concentrate is 5:1. The liquid-solid ratio is 3:1, 30°C, 60min). Washing slag and NaOH are mixed at a ratio of 1:1 and then added to a stainless steel reactor for molten salt decomposition reaction at a reaction temperature of 400°C for 2 hours to obtain a molten salt reaction material. The molten salt reaction material is washed with water (temperature 50°C, time 30min, washing liquid to solid ratio 3:1), and then pickled (sulfuric acid concentration 200g / L, temperature 50°C, time 30min, pH value of the pickling slurry is 4.8) . The pickling material is acid-dissolved with 500g / L sulfuric acid at 40°C for 4 hours to obtain the acid-dissolved material. The liquid-solid ratio of the sulfuric acid solution to the pickling material is 1.2:1. Add the acid-dissolved material to 250g / L sulfuric acid solution for lea...

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Abstract

The invention belongs to the wet-process metallurgical filed and in particular relates to a method for preparing titanium solution by wet-processing on vanadium-titanium magnetite concentrates. The method for preparing titanium solution by wet-processing on vanadium-titanium magnetite concentrates comprises the following steps of: (1), mixing the vanadium-titanium magnetite concentrate with hydrochloric acid, and leaching to obtain an intermediate sizing agent; (2), filtering the intermediate sizing agent to obtain leaching liquor and leaching residues; (3), carrying out water-washing on the leaching slag to obtain washing water and washing slag; (4), carrying out fused-salt reaction on the washing slag to obtain fused-salt reaction materials; (5), carrying out water-washing and filtering on the fused-salt reaction materials to obtain water-washing materials; (6), carrying out acid pickling on the water-washing materials to obtain sizing agent, and filtering to obtain the acid-pickled sizing agent; (7), carrying out acid dissolving on the acid-pickled materials by using a sulfuric acid solution to obtain acid-dissolved materials; and (8), adding the acid-dissolved materials to the sulfuric acid solution for extracting, and filtering to obtain extracting solution which is the titanium solution. According to the method for preparing titanium solution by wet-processing on vanadium-titanium magnetite concentrates disclosed by the invention, the titanium in the iron concentrate is sufficiently utilized, so that the titanium resource utilization rate is high and the recovery rate of the titanium in the titanium concrete is higher than 90%.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy. Specifically, the invention relates to a method for preparing liquid titanium by wet processing vanadium-titanium magnetite concentrate. Background technique [0002] Vanadium-titanium magnetite is a compound ore in which iron, vanadium, titanium and other valuable elements coexist. It is the main source of vanadium and titanium products in my country, and is mainly distributed in Panxi, Chengde and Ma'anshan areas of China. However, the comprehensive utilization rate of vanadium and titanium resources in the traditional steel-oriented blast furnace smelting technology system is very low. For example, the comprehensive utilization rate of vanadium and titanium in Panzhihua Iron and Steel (calculated from raw ore to product) is only 39% and 14.5%. Resources become waste, serious waste of resources, and serious environmental pollution. In recent years, with the development of my country's economy, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B34/12
CPCY02P10/20
Inventor 齐涛仲斌年王丽娜赵宏欣陈德胜赵龙胜刘亚辉胡国平薛天艳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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