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A production system and technology of titanium dioxide, applied in the direction of titanium dioxide, titanium oxide/hydroxide, fibrous filler, etc., can solve the problems of low production efficiency and large area, and achieve a high degree of automation, small area and production capacity big effect
Pending Publication Date: 2022-04-19
龙佰禄丰钛业有限公司
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Problems solved by technology
[0003] The existing single-batch coating equipment occupies a large area and has low production efficiency
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Embodiment 1
[0040] Continuous coating with low concentration titanium dioxide
[0041] (1) When the titanium dioxide slurry qualified by sand milling is injected into the No. 1 reaction tank, it is configured to be 230g / L, and the feed flow rate is controlled to be 10m 3 / h, feed saturated steam into the No. 1 reaction tank to ensure that the temperature of the slurry is stable at 60°C±2, adjust the pH to 10.5 by adding lye, and the actual measurement of the outlet online specific gravity analyzer is 1.16g / cm 3 , the corresponding concentration is 211.0g / L;
[0042] (2) The slurry in the No. 1 reaction tank is controlled by a pump to have a flow rate of 10m 3 / h into the No. 2 reaction tank, and open the sodium silicate (100g / L) feeding pump at the same time, the flow rate is 0.105m 3 / h, the pH is controlled at 7.5 by adjusting the amount of sulfuric acid added.
[0043] (3) The materials in the No. 2 reaction tank are pumped into the No. 3 reaction tank for aging, and the materials a...
Embodiment 2
[0049] Continuous coating with high concentration titanium dioxide
[0050] (1) When the titanium dioxide slurry qualified by sand milling is injected into the No. 1 reaction, it is configured to be 520g / L, and the feed flow rate is controlled to be 10m 3 / h, feed saturated steam into the No. 1 reactor to ensure that the slurry temperature is stable at 60 ° C ± 2, adjust the pH to 10.5 by adding lye, and the outlet online specific gravity analyzer measured 1.38g / cm 3 , the corresponding concentration is 501.2g / L;
[0051] (2) The slurry in the No. 1 reactor is controlled by a pump to have a flow rate of 10m 3 / h into the No. 2 reactor, and open the sodium silicate (100g / L) feeding pump at the same time, the flow rate is 0.251m 3 / h, the pH is controlled at 7.5 by adjusting the amount of sulfuric acid added.
[0052] (3) The materials in the No. 2 reactor are pumped into the No. 3 reaction tank for aging, and the materials are continuously stirred during this period.
[005...
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Abstract
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a titanium dioxide coating production system. The device comprises a base material storage tank, the base material storage tank is connected with a first reaction tank, a ventilation pipeline is arranged in the first reaction tank, the first reaction tank is connected with a second reaction tank, a stirring device and a sodium silicate pipeline are arranged in the second reaction tank, the second reaction tank is connected with a third reaction tank, and a stirring device is arranged in the third reaction tank. The third reaction tank is connected with a fourth reaction tank, a sodium metaaluminate pipeline and a concentrated sulfuric acid pipeline are arranged in the fourth reaction tank, the fourth reaction tank is connected with a fifth reaction tank, a stirring device is arranged in the fifth reaction tank, the fifth reaction tank is connected with a sixth pre-filter-pressing storage tank, and a sodium hydroxide pipeline and a concentrated sulfuric acid pipeline are arranged in the sixth pre-filter-pressing storage tank. The invention aims to quickly and effectively coat the inorganic compound on the surfaces of titanium dioxide particles, reduce the batch difference of titanium dioxide, improve the product stability, save the occupied area and reduce the investment cost.
Description
technical field [0001] The invention belongs to the technical field of titanium dioxide production, and in particular relates to a titanium dioxide coating production system. Background technique [0002] Titanium dioxide coating technology is to shield the photocatalytic activity of titanium dioxide. Generally, single zirconium, single silicon and single aluminum oxide units or multiple components are used for coating, which increases the hydrophilicity and powder resistance of titanium dioxide to a certain extent. and color retention. The traditional way of coating can be called single-batch coating. For single-batch coating, put the sand-milled slurry into the coating tank, adjust the concentration and pH, then raise the temperature to the required temperature for coating, then add the coating agent in sequence according to the coating formula, and adjust the final pH after aging. After the entire coating is completed, it is transferred to the next process, and the mate...
Claims
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