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Method for preparing titanium oxysulfate solution by flotation of titanium concentrate

A technology of titanium oxysulfate and titanium concentrate, applied in the direction of titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of affecting the safety of employees' operation, hidden dangers of employee's operation safety, and intense leaching in the early stage, so as to improve environmental sanitation and improve The recovery rate and the effect of reducing labor operation intensity

Active Publication Date: 2014-05-07
PANZHIHUA DONGFANG TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following technical problems will occur in the process of preparing titanyl sulfate by using flotation titanium concentrate: the fatty acid flotation agent contained in the flotation titanium concentrate will decompose instantly under the conditions of aerobic, acid and certain temperature generate a lot of SO 2 , CO 2 The bubbles formed by water vapor and gas rapidly expand the volume of the reaction in a short time, up to 5 times the volume of the premix, and expand multiple times, lasting for 2 to 3 minutes, and form splashes in the later bubble rupture. A small amount of material is brought out of the acid hydrolysis pot from the opening of the lid. The temperature of this material is higher than 180°C and the content of sulfuric acid is >80%, which seriously affects the safety of employees.
This makes the reaction asynchronous, the magnetic separation titanium concentrate is reacted and solidified, the flotation titanium concentrate is still reacting, the heat generated accumulates and splashes from the weak point, and splashes out from the opening of the acid solution pot cover, resulting in During the curing process, there is a phenomenon that the dry material is sprayed out of the acid hydrolysis pot. In the worst case, an explosion occurs, which damages the acid hydrolysis pot and seriously affects the operation safety of employees.
In addition, because the temperature of the solid phase of the flotation titanium concentrate before leaching is higher than that of the magnetic separation titanium concentrate, the leaching of the solid phase of the flotation titanium concentrate is more intense at the initial stage, and the pressure generated by bumping makes the leaching material from weak Splashing out of the pot, so that the solid phase material also sprays out of the pot at the initial stage of leaching, which also causes hidden dangers to the safety of employees

Method used

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specific Embodiment approach

[0023] The specific embodiment of the present invention is as follows: utilize flotation titanium concentrate to prepare the method for titanyl sulfate solution, comprise the steps:

[0024] a. Mix titanium concentrate ore powder and concentrated sulfuric acid evenly;

[0025] b. Put the evenly mixed ilmenite ore powder and concentrated sulfuric acid in the acid hydrolysis pot, add the initiator solution to initiate the mineral acid reaction; blow high-pressure gas into the acid hydrolysis pot during the mineral acid reaction;

[0026] c. After the mixture after the mineral acid reaction is matured, add a leaching solution into the acid hydrolysis pot for leaching, and then filter to obtain a titanyl sulfate solution.

[0027] The method of the present invention blows high-pressure gas into the acidolysis pot during the mineral acid reaction, so that the bubbles generated by the reaction burst at an early stage, reducing the degree of material splashing, thereby also reducing ...

Embodiment 1

[0036] The flotation titanium concentrate is ground by air-sweeping mill, and the fineness of the ore powder reaches 325 mesh sieve, and the remaining 25% is sent to the post-grinding bin for cooling, and the temperature is lowered to 50°C, and then sent to the ore powder metering tank. When feeding, measure 30 tons of ore powder. The content of titanium dioxide in the ore powder is 46.1%. The temperature in the mixing tank is about 42°C, and it is sent to 140m after pre-mixing 3 In the acid hydrolysis pot, the heat generated by diluting the mineral acid mixture with 5.76 tons of 22.5% dilute waste sulfuric acid triggers the mineral acid reaction. When the temperature rises to 175°C, a large number of bubbles begin to be generated in the acidolysis pot, and high-pressure air is blown into the acidolysis pot, specifically, 4 air columns are injected from the top of the acidolysis pot, and the pressure of the compressed air used is 0.4MPa After 3 minutes, the material is solidi...

Embodiment 2

[0038] The flotation titanium concentrate is ground by wind sweeping mill, and the fineness of the ore powder reaches 325 mesh sieve, and the remaining 5% is sent to the post-grinding bin for cooling, and the temperature is lowered to 50°C, and then sent to the ore powder metering tank. When feeding, measure 30 tons of ore powder, the content of titanium dioxide in the ore powder is 46.2%, pre-mix the ore powder and 50.82 tons of 91.5% concentrated sulfuric acid in the pre-mixing tank for 10 minutes, and the temperature of the added concentrated sulfuric acid is 40°C. The temperature in the mixing tank is about 42°C, and it is sent to 140m after pre-mixing 3 In the acidolysis pot, the heat generated by diluting the mineral acid mixture with 4.21 tons of water initiates the mineral acid reaction. When the temperature rose to 175°C, a large number of bubbles began to be generated in the acid hydrolysis pot, and 75kg of D313 defoamer was added. The D313 defoamer came from Dow Cor...

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Abstract

The invention discloses a method for preparing a titanium oxysulfate solution by flotation of titanium concentrate, and belongs to the field of chemical engineering, wherein the method has characteristics of reduction of material spitting degree during the mineral acid reaction and avoidance of material spitting out of the acid hydrolysis pot during the mineral acid reaction. The method comprises the following steps: a, uniformly mixing titanium concentrate powder and concentrated sulfuric acid; b, placing the resulting mixture in an acid hydrolysis pot, adding an initiation liquid to initiate a mineral acid reaction, and blowing high pressure gas to the acid hydrolysis pot during the mineral acid reaction; c, carrying out ripening on the mixture after the mineral acid reaction, adding a leaching liquid to the acid hydrolysis pot to carry out leaching, and filtering to obtain the titanium oxysulfate solution. With the method of the present invention, the phenomenon of the material spitting out of the acid hydrolysis pot is avoided, the safety of the operator during the production process is ensured, the environmental sanitation is improved, and the labor operation intensity is reduced, such that the popular application of the titanium concentrate flotation in the titanium pigment production by the sulfuric acid method is promoted.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing titanyl sulfate solution by utilizing flotation titanium concentrate. Background technique [0002] Titanium concentrate is extracted from ilmenite or titanomagnetite, and is a very versatile raw material for titanium dioxide. To produce titanium dioxide with titanium concentrate, the first step is to prepare a titanyl sulfate solution. The method for preparing a titanyl sulfate solution from titanium concentrate usually includes the following process: send the titanium concentrate to a wind-swept mill for grinding, and the ground mineral powder is recycled The air is sent to the classifier for classification, and the coarse-grained ore powder that does not meet the requirements is sent to the air-swept mill for continuous grinding, and the ore powder that meets the required particle size is sent to the storage bin. Before acidolysis, first pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047
Inventor 景建林黄北卫陈新红吴建春刘小波
Owner PANZHIHUA DONGFANG TITANIUM IND
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