A continuous acid hydrolysis production process of sulfuric acid titanium dioxide

A production process, technology of sulfuric acid method, applied in the direction of titanium and titanyl sulfate, titanium dioxide, titanium compounds, etc., can solve the problems of severe instantaneous reaction and ineffective treatment of acidolysis tail gas, so as to improve the acidolysis rate and reduce the treatment Difficulty, Narrow Effects

Active Publication Date: 2022-04-05
安徽迪诺环保新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the traditional intermittent acidolysis reacts violently instantaneously, and a large amount of acidolysis tail gas cannot be effectively treated. Therefore, a continuous acidolysis production process of sulfuric acid method titanium dioxide is provided

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  • A continuous acid hydrolysis production process of sulfuric acid titanium dioxide

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Embodiment 1

[0009] Embodiment 1: A continuous acid hydrolysis production process of sulfuric acid titanium white, which comprises the following steps: (1), pre-mixing: the fineness after crushing is 325 mesh sieve ≤ 6% ore powder and 98% concentrated sulfuric acid The mass ratio is 1:1.55 for pre-mixing; (2), cooling: cool the pre-mixture with cold water at 10°C, control the temperature of the mixture at 24°C, and put the pre-mixture into the transfer tank; (3), adjust Speed: Start the two stirring shafts of the main reactor, adjust the rotating speed of the stirring shafts to 12rpm for the first shaft, and 14rpm for the second shaft; (4), intermittent feeding: open the discharge valve of the transfer tank, and control the flow rate of the premixed material to 8m 3 / h into the main reactor, open the 20% sulfuric acid feed valve at the same time, control the flow of acid feed to 1m 3 / h, after feeding for 8 minutes, close the transfer tank discharge valve and 20% sulfuric acid feeding valv...

Embodiment 2

[0010] Embodiment 2: A continuous acid hydrolysis production process of sulfuric acid titanium white, which includes the following steps: (1), pre-mixing: the crushed ore powder with a fineness of 325 mesh sieve ≤ 6% and 98% concentrated sulfuric acid The mass ratio is 1:1.55 for pre-mixing; (2), cooling: cool the pre-mixture with cold water at 12°C, control the temperature of the mixture at 20°C, and put the pre-mixture into the transfer tank; (3), adjust Speed: Start the two stirring shafts of the main reactor, adjust the rotating speed of the stirring shafts to 12rpm for the first shaft, and 14rpm for the second shaft; (4), intermittent feeding: open the discharge valve of the transfer tank, and control the flow rate of the premixed material to 8m 3 / h into the main reactor, open the 20% sulfuric acid feed valve at the same time, control the flow of acid feed to 1m 3 / h, after feeding for 9 minutes, close the transfer tank discharge valve and 20% sulfuric acid feed valve at...

Embodiment 3

[0011] Embodiment 3: A continuous acid hydrolysis production process of sulfuric acid titanium white, which includes the following steps: (1), pre-mixing: the crushed ore powder with a fineness of 325 mesh sieve ≤ 6% and 98% concentrated sulfuric acid The mass ratio is 1:1.55 for pre-mixing; (2), cooling: cool the pre-mixture with cold water at 15°C, control the temperature of the mixture at 15°C, and put the pre-mixture into the transfer tank; (3), adjust Speed: Start the two stirring shafts of the main reactor, adjust the rotating speed of the stirring shafts to 12rpm for the first shaft, and 14rpm for the second shaft; (4), intermittent feeding: open the discharge valve of the transfer tank, and control the flow rate of the premixed material to 8m 3 / h into the main reactor, open the 20% sulfuric acid feed valve at the same time, control the flow of acid feed to 1m 3 / h, after 10 minutes of feeding, close the transfer tank discharge valve and 20% sulfuric acid feeding valve...

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Abstract

The invention discloses a sulfuric acid method titanium white continuous acidolysis production process, which comprises the following steps: (1), pre-mixing: crushed ore powder with a fineness of 325 mesh sieve ≤ 6% and 98% concentrated sulfuric acid The mass ratio is 1:1.55 for pre-mixing; (2). Cooling: Cool the pre-mixture with cold water at 10°C-15°C, control the temperature of the mixture to <25°C, and put the pre-mixture into the transfer tank; (3 ), speed regulation; (4), intermittent feeding; (5), continuous feeding: repeat step (4) until the temperature of the reaction system is 120‑130 °C, then open the transfer tank discharge valve and 20% sulfuric acid feed valve , start continuous feeding; (6), discharge dilution. The beneficial effect of the present invention is that the entire acidolysis reaction of the production process is carried out continuously in a small amount, which is different from the concentrated reaction of a large amount of materials in a short time in the traditional intermittent acidolysis reaction. It reduces the difficulty of acidolysis tail gas treatment and the potential safety hazards caused by excessive reaction. At the same time, the acid hydrolysis rate has been improved to a certain extent, and the distribution range of the acid hydrolysis rate is narrow.

Description

technical field [0001] The invention relates to the field of producing titanium dioxide by a sulfuric acid method, in particular to a continuous acidolysis production process of titanium white by a sulfuric acid method. Background technique [0002] At present, titanium dioxide has increasingly become an irreplaceable best inorganic chemical pigment. With the wide application of titanium dioxide in daily life, its total production has gradually become an important reference standard for social consumption. The production process of titanium dioxide mainly includes chloride process and sulfate process. The latter is more perfect than the former, and titanium dioxide is widely used in ceramics, plastics, elastomers, inks, coatings and fluxes. Its production process is also highly valued in industrially developed countries. [0003] According to the concentration of sulfuric acid involved in the reaction and the loading of the final reactant, the sulfuric acid method can be di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C01G23/00
CPCC01G23/0532C01G23/008
Inventor 荚玉冬赵义凯
Owner 安徽迪诺环保新材料科技有限公司
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