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Titanium white waste acid utilization method

A technology for titanium dioxide waste acid and titanium dioxide, which is applied in phosphoric acid, phosphorus oxyacid and other directions, can solve the problems of increased production cost of phosphoric acid, high application cost, complicated process, etc., so as to increase treatment cost, reduce phosphorus content, and prolong cleaning. effect of cycles

Active Publication Date: 2012-06-20
ANHUI LIUGUO CHEM CO LTD
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Problems solved by technology

This process of concentrating and removing impurities is not only complicated in process, but also consumes a lot of energy, which leads to high application cost. It costs 1,000 yuan to process 1 ton of titanium dioxide waste acid, which leads to an increase in the production cost of phosphoric acid.

Method used

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  • Titanium white waste acid utilization method
  • Titanium white waste acid utilization method
  • Titanium white waste acid utilization method

Examples

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Embodiment Construction

[0010] Such as figure 1 As shown, the titanium dioxide waste acid containing sulfuric acid concentration of about 20% from the titanium dioxide production line is sent into the dilute acid tank 1 through the pipeline 11 through the pump 12 and the pipeline 13, and the process circulating water from the production of wet-process phosphoric acid is passed through the pipeline 14 Pass into the dilute acid tank 1, and the two are sent into the dilute acid tank 1 in proportion, so that the concentration of the dilute acid solution in the dilute acid tank 1 is controlled between 2% and 5%, preferably about 3%.

[0011] The dilute acid pump 15 pumps the dilute acid solution in the dilute acid tank 1 to the disc filter 2 through the pipeline 16 as washing water to perform countercurrent washing on the phosphoric acid filter cake. The washing steps are as follows: the dilute acid solution is sent to the third washing area 24 through the pipeline 16 as the third washing water; the washi...

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Abstract

The invention discloses a titanium white waste acid utilization method. A titanium white waste acid byproduct of titanium white powder of sulfuric acid process is diluted by water to obtain H2SO4 dilute acid liquid with percentage concentration, by weight percentage, lower than or equal to 5%, the dilute acid liquid is used as washing water for ardealite filter cakes prepared by the aid of wet-method phosphoric acid, and washing liquid is used as backflow phosphoric acid to enter a wet-method phosphoric acid reaction system after washing. The titanium white waste acid is used as the washing water for the filter cakes of wet-method phosphoric acid, and can enter the wet-method phosphoric acid production system to be utilized, the utilization method is simple, and phosphoric acid productioncost is lowered. Simultaneously, by the aid of the titanium white waste acid utilization method, scaling of a filtering system and a phosphoric acid backflow pipeline can be relieved, a washing period of the filtering system can be prolonged, running time can be prolonged, and production efficiency is improved.

Description

technical field [0001] The invention relates to a utilization method of titanium white waste acid. Background technique [0002] The sulfuric acid method is used to produce titanium dioxide, and the by-product titanium dioxide waste acid is 8 to 10 tons per ton of titanium dioxide produced. The main component of titanium dioxide waste acid is sulfuric acid with a concentration of about 20% by weight, which must be treated, otherwise it will pollute the environment. . However, the decomposition of phosphate rock in the production of wet-process phosphoric acid requires a large amount of sulfuric acid, and the production of 1 ton of phosphoric acid with a concentration of 21% requires 0.526 tons of sulfuric acid. It is a good choice to use titanium dioxide waste acid as raw material for wet-process phosphoric acid. However, due to the H in titanium dioxide waste acid 2 SO 4 The concentration is low and contains about 5-8% ferrous sulfate, so it cannot be directly applied t...

Claims

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Application Information

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IPC IPC(8): C01B25/22
Inventor 张斌郭晓彬钱勇马健沈浩
Owner ANHUI LIUGUO CHEM CO LTD
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