Establishment and application of a determination method for van der Waals adsorption of organic matter in reduced iron powder in titanium dioxide industry and its quality detection system
A technology of reduced iron powder and determination method, which is applied in the directions of measuring device, chemical method analysis, preparation of test samples, etc., can solve problems such as blank, and achieves the improvement of control force, reduces the risk of difficult sedimentation, and shortens the production cycle. Effect
Active Publication Date: 2020-11-10
JINAN YUXING CHEM
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Problems solved by technology
However, at present, the titanium dioxide sulfate industry only monitors the main content of iron powder, that is, the content of elemental iron, while the monitoring of organic matter adsorbed on the surface of reduced iron powder is almost blank.
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Embodiment 1
[0028] (1) Take a sample of 20g of iron powder and dry it at 60°C for 2h;
[0029] (2) Then use one or more mixed solvents of toluene, ethyl acetate, benzene, ethanol, acrylic acid, methanol, styrene, chloroform, methylene chloride, acrylic acid, triethanolamine at a temperature of 60 ° C, 110 kHz frequency ultrasonic conditions The above-mentioned ore powder is leached for 1h;
[0030] (3) Separate the mixed slurry for 30 minutes under 3000Xg relative centrifugal field (RCF, relative centrifugal field);
[0031] (4) Then take the supernatant liquid and put it under 80℃, 95KPa vacuum pressure reduction, vacuum distillation for 2h, solvent distillation, condensation recovery;
[0032] (5) Add 5ml of double-distilled water, and continue for 0.5h at 70°C and 120kHz frequency ultrasonic conditions;
[0033] (6) Add 0.1~10ml Lianhua special D reagent for COD and 0.1~10ml Lianhua special E reagent in turn, mix well; then digest at 170°C for 0.5h and cool to room temperature, reage...
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The invention discloses a method for determining reduced iron powder van der Waals adsorption organic matter in titanium white industry, establishment of quality inspection system and application thereof. The COD value of the reduced iron powder van der Waals adsorption organic matter is determined by means of leaching-volatilization-re-leaching. In addition, the reduced iron powder is mixed by using a fluxing agent, carbon and sulfur are heated at a high temperature under oxygen blowing conditions, and the high-frequency induction heating furnace burns the reduced iron powder and burns to CO2and SO2 gas. After being treated, the high-temperature combustion gas enters the corresponding absorption pool, and absorbs the corresponding infrared radiation, so as to be forwarded by the detectoras a signal, and is processed by the computer to output the carbon and sulfur content of the reduced iron powder. In the above manner, the invention can easily and effectively detect COD and carbon and sulfur impurities caused by organic matters brought in by iron powder during the operations of production, packaging, transportation, etc., shorten the production cycle of black titanium liquid, reduce the risk of difficult settlement of black titanium liquid, and improve the control of COD value of organic matter in titanium sulfate white wastewater.
Description
technical field [0001] The invention belongs to the technical field of sulfuric acid production of titanium dioxide, and in particular relates to a method for determining van der Waals adsorption of organic matter in reduced iron powder in the titanium dioxide industry and the establishment and application of a quality detection system. Background technique [0002] At present in the world, titanium dioxide (TiO 2 ) The production process is mainly two kinds of titanium dioxide by chloride method and titanium dioxide by sulfuric acid method. The production of titanium dioxide by the sulfuric acid method has a history of 90 years. Because of its mature process route, low requirements for the strength of equipment and devices, and low requirements for the grade of raw materials, it can also produce two crystal forms of titanium dioxide, anatase and rutile. So far, titanium dioxide The sulfuric acid method still has strong vitality and will complement each other with the chlor...
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IPC IPC(8): G01N1/28G01N1/34G01N31/00G01N21/3563
CPCG01N1/28G01N1/34G01N21/3563G01N31/00G01N2021/3572
Inventor 仝宇杨艳梅王瑞李俊磊吴兆栋
Owner JINAN YUXING CHEM