Process for producing titanium dioxide through sulfuric acid method as well as titanyl sulfate solution reduction device and method

A technology of titanium dioxide and sulfuric acid method, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high iron consumption for reduction, increased iron sheet consumption, and long reduction time, and achieves simple equipment, easy implementation, and reduced The effect of the amount of oxygen

Active Publication Date: 2014-03-19
PANGANG GROUP RESEARCH INSTITUTE CO LTD +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the existing operation method, the consumption of iron powder is usually more than 2 times of the theoretical consumption, and the reaction speed is relatively slow, and the reduction time is long. Due to the need to feed a large amount of compressed air from the bottom of the acidolysis pot for stirring, the increase of Iron sheet consumption due to air oxidation
Therefore, the consumption of iron for reduction is relatively high, and the consumption of iron powder for reduction of ton of titanium dioxide is about 100Kg

Method used

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  • Process for producing titanium dioxide through sulfuric acid method as well as titanyl sulfate solution reduction device and method
  • Process for producing titanium dioxide through sulfuric acid method as well as titanyl sulfate solution reduction device and method
  • Process for producing titanium dioxide through sulfuric acid method as well as titanyl sulfate solution reduction device and method

Examples

Experimental program
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Effect test

example 1

[0035] The volume is 130m 3 28t of titanium concentrates are dropped into the acid hydrolysis pot 7 to react with concentrated sulfuric acid. During the acid hydrolysis and leaching process, the compressed air valve 6 is opened, and the first valve 3 and the second valve 5 are closed to ensure that the pipeline is unblocked. After leaching, close the compressed air valve 6, open the first valve 3 and the second valve 5, and then open the feeding pump 4, and pump the suspension made of iron powder and water in the mixing kettle 2 into the acid Solve the bottom in the pot 7. After the suspension is added, close the feeding pump 4, close the first valve 3 and the second valve 5, and open the compressed air valve 6. At the same time, reduce the flow rate of the compressed air used for stirring from the bottom of the acidolysis pot 7 to 200m 3 / h, keep the acid hydrolysis titanium solution flowing slightly, and the reduction ends after 1.5h.

example 2

[0037] The volume is 130m 3 28t of titanium concentrates are dropped into the acid hydrolysis pot 7 to react with concentrated sulfuric acid. During the acid hydrolysis and leaching process, the compressed air valve 6 is opened, and the first valve 3 and the second valve 5 are closed to ensure that the pipeline is unblocked. After leaching, close the compressed air valve 6, open the first valve 3 and the second valve 5, and then open the feeding pump 4, and pump the suspension made of iron filings and water in the mixing kettle 2 into the acid Solve the bottom in the pot 7. After the suspension is added, close the feeding pump 4, close the first valve 3 and the second valve 5, and open the compressed air valve 6. At the same time, turn down the flow of compressed air for stirring from the bottom of the acidolysis pot 7 to 100m 3 / h, keep the acid hydrolysis titanium solution flowing slightly, and the reduction ends after 1.5h.

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Abstract

The invention provides a process for producing titanium dioxide through a sulfuric acid method as well as a titanyl sulfate solution reduction device and method. The device comprises a compressed air supply pipe, a first valve, a second valve, a compressed air valve and a mixing kettle, a delivery pump and a reactor which are connected in order through a pipeline, the mixing kettle is used for preparing an iron reducing agent and water into suspension by mixing, the first valve is arranged on a first part between the mixing kettle and the delivery pump, the second valve is arranged on a second part between the delivery pump and the reactor; the compressed air supply pipe is connected with a third part between the second part of the pipeline and the reactor so as to supply the compressed air to the reactor through the pipeline; the compressed air valve is arranged on the compressed air supply pipe, the reactor is filled with a to-be-reduced titanyl sulfate solution, and the bottom thereof is provided with a compressed air distribution plate; and one end of the pipeline connected with the reactor extends to the bottom of the reactor and is higher than the compressed air distribution plate and below the liquid level of the titanyl sulfate solution.

Description

technical field [0001] The invention relates to a process for producing titanium dioxide by a sulfuric acid method, and more specifically, relates to an acidolysis titanium liquid reduction device and method in the process for producing titanium dioxide by a sulfuric acid method. Background technique [0002] The production of titanium dioxide by sulfuric acid method is a mature production method. The raw materials used are titanium-containing materials such as ilmenite or titanium slag. It mainly includes the following steps: raw ore preparation; decomposing titanium-containing materials with sulfuric acid to prepare titanium sulfate solution; Purification and removal of iron; hydrolysis and analysis of metatitanic acid from titanium sulfate solution; calcining of metatitanic acid to produce titanium dioxide and post-treatment procedures, etc. [0003] When using ilmenite as raw material, since iron exists in two different states of divalent and trivalent in ilmenite, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 王斌杜剑桥吴健春任亚平程晓哲杨仰军秦兴华
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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