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Comprehensive Utilization Method of Titanium White Waste Acid Wastewater

A technology of titanium white waste acid and waste water, which is applied in the direction of titanium compounds, chemical instruments and methods, rare earth metal compounds, etc., can solve the problem of not being able to make full use of titanium white waste acid waste water at low cost, and achieve significant economic and social benefits, Good promotion prospects and the effect of solving environmental pollution

Inactive Publication Date: 2011-12-14
攀枝花市尚亿科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention is to solve is the technical problem that the waste water of titanium dioxide cannot be fully utilized at low cost in the prior art, and a method for comprehensive utilization of waste water of titanium dioxide is provided

Method used

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  • Comprehensive Utilization Method of Titanium White Waste Acid Wastewater

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Embodiment 1

[0042] Embodiment 1 Treatment of titanium white waste acid with the method of the present invention

[0043] Raw material used in this embodiment: hydrochloric acid solution: mass fraction is 25% industrial waste hydrochloric acid, also contains free chlorine 18ppm, Ca 2+ : 20.8ppm, Mg 2+ : 12.25ppm, Fe 2+ : 2.3%, from Panzhihua Steel Enterprise Xinyu Chemical Co., Ltd. Limestone: The mass percentage of calcium carbonate is 90%, and it also contains trace amounts of silicon dioxide, aluminum oxide, ferric oxide and magnesium oxide, and is sourced from Panzhihua Xingzhong Titanium Industry Co., Ltd. Titanium white waste acid: sulfuric acid 21.12%, iron 5.4%, titanium 0.98%, vanadium 440g / t, scandium 26g / t, gallium 22g / t, sourced from Panzhihua Tianlun Chemical Co., Ltd. Commercially available 30% sodium hydroxide.

[0044] a, prepare calcium chloride solution: add limestone 388g in 1000g industrial waste hydrochloric acid, filter after fully reacting, collect filtrate, reco...

Embodiment 2

[0051] Embodiment two processing titanium white waste acid with the method of the present invention

[0052] Raw material used in this embodiment: hydrochloric acid solution: mass fraction is 16% industrial waste hydrochloric acid, also contains free chlorine 13ppm, Ca 2+ : 14.8ppm, Mg 2+ : 7.3ppm, Fe 2+ : 1.6%, from Panzhihua Steel Enterprise Xinyu Chemical Co., Ltd. Limestone: The mass percentage of calcium carbonate is 93.1%, and it also contains trace amounts of silicon dioxide, aluminum oxide, iron oxide and magnesium oxide, and is sourced from Panzhihua Xingzhong Titanium Industry Co., Ltd. Titanium white waste acid: 20.5% sulfuric acid, 5.1% iron, 0.95% titanium, 410g / t vanadium, 25g / t scandium, 21g / t gallium, sourced from Panzhihua Tianlun Chemical Co., Ltd. Commercially available 30% sodium hydroxide.

[0053] a, prepare calcium chloride solution: add limestone 275g excessively 15% in 1000g industrial waste hydrochloric acid, filter after fully reacting, collect f...

Embodiment 3

[0062] Embodiment three processing titanium white waste acid with the method of the present invention

[0063] Raw materials used in this embodiment (with embodiment two): hydrochloric acid solution: mass fraction is 16% industrial waste hydrochloric acid, also contains free chlorine 13ppm, Ca 2+ : 14.8ppm, Mg 2+ : 7.3ppm, Fe 2+ : 1.6%, from Panzhihua Steel Enterprise Xinyu Chemical Co., Ltd. Limestone: The mass percentage of calcium carbonate is 93.1%, and it also contains trace amounts of silicon dioxide, aluminum oxide, iron oxide and magnesium oxide, and is sourced from Panzhihua Xingzhong Titanium Industry Co., Ltd. Titanium white waste acid: 20.5% sulfuric acid, 5.1% iron, 0.95% titanium, 410g / t vanadium, 25g / t scandium, 21g / t gallium, sourced from Panzhihua Tianlun Chemical Co., Ltd. Commercially available 30% sodium hydroxide.

[0064] a, prepare calcium chloride solution: add limestone 275g excessively 15% in 1000g industrial waste hydrochloric acid, filter after ...

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Abstract

The invention discloses a comprehensive utilization method of titanium white waste acid wastewater, which belongs to the field of metallurgy. The method of the invention aims to solve the technical problem in the prior art that the titanium white waste acid wastewater cannot be fully utilized at low cost. The method for comprehensive utilization of titanium white waste acid waste water comprises the following steps: a. adding limestone to the hydrochloric acid solution, fully reacting to obtain a calcium chloride solution; b. adding titanium white waste acid or waste water to the calcium chloride solution, filtering after fully reacting Obtain calcium sulfate dihydrate and filtrate, described calcium sulfate dihydrate obtains product gypsum through drying process; c, the filtrate obtained in step b is used as the raw material for preparing calcium chloride solution and reacts with limestone, after repeating steps a and b more than once , adding sodium hydroxide solution to the filtrate obtained in step b, and filtering to obtain a sodium chloride solution and a precipitate rich in iron, titanium, vanadium, scandium and gallium after sufficient reaction. The method of the invention has low cost, can well solve the problem of environmental pollution caused by titanium dioxide waste acid and waste water, and has good promotion prospects.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a comprehensive utilization method of titanium white waste acid wastewater. Background technique [0002] At present, because our country mainly adopts the sulfuric acid method to produce titanium dioxide, and every ton of titanium dioxide produced will produce about 6 tons of 20% waste acid and about 60-80 tons of 3% waste water. The waste acid produced by sulfuric acid production of titanium dioxide is called titanium dioxide waste acid. The main material composition of titanium dioxide waste acid is: 18-25% sulfuric acid, about 5% iron, about 1% titanium, 300-500g vanadium per t, scandium and gallium at 20-30g / t, etc.; the wastewater produced by sulfuric acid production of titanium dioxide is called titanium dioxide wastewater, which mainly contains about 2-4% sulfuric acid, and other components are about One-sixth of sour. According to statistics, only the Panzhihua ar...

Claims

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Application Information

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IPC IPC(8): C01F11/46C01D3/04C01G49/02C01G23/00C01G31/02C01F17/00C25B1/20C25B1/26
Inventor 汤铁陈小丽张云军
Owner 攀枝花市尚亿科技有限责任公司
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