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Method for recovering titanium in wastewater

A waste water and titanium recovery technology, which is applied in metallurgical waste water treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of reducing the recovery rate of titanium, low compound recovery rate, environmental problems, etc.

Active Publication Date: 2014-06-25
CNMC GUANGXI PGMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the technological process of sulfuric acid production of titanium dioxide, the discharge of waste acid and waste water has caused serious environmental problems. At the same time, due to the discharge of these waste acids and waste water, some titanium-containing compounds have been taken away to varying degrees, reducing the recovery and utilization of titanium. Therefore, the treatment of wastewater and the recovery of titanium will have very important economic and social benefits
Waste water and waste acid are mainly produced during the suction filtration and washing process of the hydrolyzed titanium-containing compound. To produce one ton of titanium dioxide, the amount of waste water produced is about 60 to 100 tons, and the range of acid content fluctuates greatly, ranging from several From mg / L to dozens of g / L, because it contains a certain amount of titanium-containing compounds, it brings great difficulties to post-treatment and discharge, and the recovery rate of titanium-containing compounds is very low, and the loss is very serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a recovery method of titanium in waste water, is characterized in that, comprises the following steps:

[0018] 1) Material preparation: measure 4 liters of titanium-containing wastewater, and detect the TiOSO at this time 4 The concentration is 2.3g / L, weigh 0.3kg of neutralizing agent calcium carbonate ore powder, pump the waste water into the slurry storage tank, and place the neutralizing agent calcium carbonate ore powder in a cool place;

[0019] 2) One-time neutralization: turn on the stirring device, and carry out uniform stirring treatment at 25°C and 100KPa pressure at 60 revolutions per minute, and add calcium carbonate ore powder to the waste water for the first time during the stirring process. The second pH value neutralization adjustment, the pH value of the wastewater is adjusted to 1, the neutralization time is controlled within 30 minutes, and the neutralization reaction is stopped;

[0020] 3) Primary filtration: pump the waste water af...

Embodiment 2

[0024] Embodiment 2, a recovery method of titanium in waste water, is characterized in that, comprises the following steps:

[0025] 1) Material preparation: measure 4 liters of titanium-containing wastewater, and detect the TiOSO at this time 4 The concentration is 2.5g / L, weigh 0.3kg of neutralizing agent calcium carbonate ore powder, pump the waste water into the slurry storage tank, and place the neutralizing agent calcium carbonate ore powder in a cool place;

[0026] 2) Primary neutralization: Turn on the stirring device, and carry out the uniform stirring treatment at 80 rpm at 26°C and 105KPa pressure in the slurry storage tank, and add calcium carbonate ore powder to the waste water during the stirring process. The second pH value neutralization adjustment, the pH value of the wastewater is adjusted to 1, the neutralization time is controlled within 30 minutes, and the neutralization reaction is stopped;

[0027] 3) Primary filtration: pump the wastewater after prima...

Embodiment 3

[0031] Embodiment 3, a recovery method of titanium in waste water, is characterized in that, comprises the following steps:

[0032] 1) Material preparation: measure 4 liters of titanium-containing wastewater, and detect the TiOSO at this time 4 The concentration is 2.3g / L, weigh 0.35kg of neutralizing agent calcium carbonate ore powder, pump the waste water into the slurry storage tank, and place the neutralizing agent calcium carbonate ore powder in a cool place;

[0033] 2) One-time neutralization: turn on the stirring device, and carry out uniform stirring treatment at 80 revolutions per minute at 28°C and a pressure of 110KPa, and add calcium carbonate ore powder to the waste water for the first time during the stirring process. The second pH value neutralization adjustment, the pH value of the wastewater is adjusted to 1.6, the neutralization time is controlled within one and a half minutes, and the neutralization reaction is stopped;

[0034] 3) Primary filtration: pum...

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PUM

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Abstract

The invention discloses a method for recovering titanium in wastewater, which comprises the following steps of: 1, material preparation, i.e. weighing materials according to a feed liquid ratio for later use; 2, primary neutralization, i.e. starting a stirring device, carrying out uniform-speed stirring treatment on the weighed wastewater in a slurry storage tank and in the stirring process, adding calcium carbonate mineral powder to carry out first PH value neutralization debugging on the wastewater; 3, primary filtering, i.e. pumping the wastewater which is subjected to primary neutralization filtering into a filtering system to carry out filtering treatment, taking filtrate and pumping back filter residues into a wastewater tank; 4, secondary neutralization; 5, secondary filtering; and 6, acid hydrolysis. A neutralizer used in the method is low in price; the production cost is reduced; the provided method is simple to operate; the energy consumption is reduced; the titanium recovery rate is high; and the method has a wide market prospect.

Description

technical field [0001] The invention relates to a method for recovering metals in waste water, in particular to a method for recovering titanium in waste water. Background technique [0002] In the technological process of sulfuric acid production of titanium dioxide, the discharge of waste acid and waste water has caused serious environmental problems. At the same time, due to the discharge of these waste acids and waste water, some titanium-containing compounds have been taken away to varying degrees, reducing the recovery and utilization of titanium. Therefore, treating the wastewater and recovering the titanium will have very important economic and social benefits. Waste water and waste acid are mainly produced during the suction filtration and washing process of the hydrolyzed titanium-containing compound. To produce one ton of titanium dioxide, the amount of waste water produced is about 60-100 tons, and the range of acid content fluctuates greatly, ranging from severa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C02F1/66C02F1/62C22B34/12C02F101/20C02F103/16
CPCY02P10/20
Inventor 黄桂永
Owner CNMC GUANGXI PGMA