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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 5. Отображено 5.
18-07-2023 дата публикации

Method for ultralow-fluorine-content discharge of titanium dioxide production effluent water

Номер: CN116444099A
Автор: CHI YONGMING, CHEN BO, ZHONG XIAOYING, ZHOU YINGHUA, WU PENGSEN, ZHOU CHUNYONG
Принадлежит:

The invention relates to a method for ultralow-fluorine-content discharge of titanium dioxide production effluent water. The method comprises the following steps: 1) adjusting the pH value of the titanium dioxide production effluent water to 10-12 by using alkali; (2) adding an anionic flocculant to flocculate and precipitate, and carrying out solid-liquid separation to obtain filter residues and filtrate; and 3) reversely adjusting the pH value of the filtrate to 6-9 by using acid. When the fluorine-containing wastewater in titanium dioxide production is treated, the technological process is simple, and the requirement that the fluorine content is reduced to be smaller than or equal to 1.5 mg/L can be met only by adjusting the pH value of discharged water. A defluorination agent is not needed in the treatment process, so that the cost is low; the generated sludge amount is small, and the sludge treatment load is small.

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Номер записи: 1
08-08-2023 дата публикации

Method for recovering titanium in titanium gypsum

Номер: CN116553609A
Автор: CHI YONGMING, DAI TANGJUN, XIONG HUAIZHONG, LIN FARONG, WU PENGSEN, ZHOU CHUNYONG
Принадлежит:

The invention relates to a method for recovering titanium in titanium gypsum, which comprises the following steps: 1) neutralizing sulfate process titanium dioxide production wastewater with calcium hydroxide until the pH value is 3.0-3.5, and carrying out first solid-liquid separation to obtain a first filtrate and a first filter residue; and 2) performing acid dissolution on the primary filter residue by using sulfuric acid, performing secondary solid-liquid separation to obtain secondary filtrate and secondary filter residue, and recycling the secondary filtrate as leaching water during acidolysis. According to the method, titanium in the titanium gypsum can be recycled, the total yield of a sulfuric acid method titanium dioxide production process can be improved, good economic benefits can be generated, meanwhile, a part of white gypsum can be recycled, the output of the titanium gypsum is reduced, and the problem of solid waste stacking is solved.

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Номер записи: 2
21-07-2023 дата публикации

Method for recovering ferrotitanium from titanium dioxide byproduct yellow ferrous iron

Номер: CN116462234A
Автор: LIU QIQI, HE JUN, WEN JUN, CHI YONGMING, ZHOU CHUNYONG, WU PENGSEN, HE BENLIU
Принадлежит:

The invention relates to a method for recovering ferrotitanium from titanium dioxide by-product yellow ferrous, which comprises the following steps: 1) mixing sulfuric acid method titanium dioxide by-product yellow ferrous with an alkaline substance, pulping, controlling and neutralizing the pH value at 2.8-4.1, and carrying out solid-liquid separation to obtain precipitate and filtrate; and 2) dissolving the precipitate obtained in the step 1) with sulfuric acid to obtain a mixed solution, and returning the mixed solution to a hydrolysis process or an acidolysis process in the sulfuric acid method titanium dioxide process. According to the method, titanium-iron-sulfur resources in the titanium dioxide byproduct yellow ferrous iron can be recycled, environmental hazards are reduced, the titanium-containing solution can be returned to titanium dioxide production for hydrolysis or acidolysis, the titanium yield of a system is increased by about 1%, the purity of the byproduct ferrous sulfate ...

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Номер записи: 3
15-08-2023 дата публикации

Method for recovering titanium dioxide in titanium white waste acid

Номер: CN116588971A
Автор: CHI YONGMING, YIN LIHUA, ZHAO QIN, WU PENGSEN, HE BENLIU
Принадлежит:

The invention relates to a method for recovering titanium dioxide in titanium dioxide waste acid, which comprises the following steps: 1) adding 98% concentrated sulfuric acid into waste acid generated in a process for preparing titanium dioxide by a sulfuric acid method to prepare acid, and controlling the temperature not to exceed 50 DEG C in the acid preparation process; and 2) curing the mixed solution after acid preparation, filtering and separating, and returning the filtrate to an acidolysis process in a process for preparing titanium dioxide by a sulfuric acid method. According to the method disclosed by the invention, titanium can be recycled by controlling the temperature in the acid preparation process while waste acid in the titanium dioxide process is recycled, and the method is simple in process and easy to implement. In addition, the titanium content in the yellow ferrous iron obtained by recovering the filter cake can be reduced, and the purity quality of the yellow ferrous ...

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Номер записи: 4
15-08-2023 дата публикации

Titanium dioxide wastewater non-waste treatment method

Номер: CN116589127A
Автор: CHI YONGMING, HOU DAN, HE JUN, LIU QIQI, ZHAO QIN, ZHOU CHUNYONG, WU PENGSEN
Принадлежит:

The invention relates to a waste-free treatment method for titanium dioxide wastewater, which comprises the following steps: 1) neutralizing the titanium dioxide wastewater for the first time until the pH value is 2.0-3.0, and carrying out solid-liquid separation to obtain white gypsum and primary filtrate; 2) neutralizing the primary filtrate for the second time until the pH value is 3.5-4.5, adding a flocculating agent, and performing solid-liquid separation to obtain metatitanic acid and secondary filtrate; and 3) adding an oxidizing agent into the secondary filtrate to react, neutralizing for the third time until the pH value is 6.0-7.0, adding a flocculating agent, and carrying out solid-liquid separation to obtain iron oxyhydroxide and a third filtrate. According to the method disclosed by the invention, various resources in the titanium dioxide wastewater are completely recycled through step-by-step neutralization and control of the pH value in each step of neutralization, so that ...

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Номер записи: 5