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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 2. Отображено 2.
18-07-2023 дата публикации

Method for extracting lithium from lepidolite by using composite salt roasting-water leaching process

Номер: CN116445736A
Автор: CHEN WEI, ZHOU KANGGEN, PENG CHANGHONG, PEI ZHANLIN, LEI QINGYUAN, ZHANG GUOPENG
Принадлежит:

The invention discloses a method for extracting lithium from lepidolite by using a composite salt roasting-water leaching process, which comprises the following steps of: mixing lepidolite mineral powder and composite salt consisting of calcium chloride, calcium sulfate, sodium chloride and potassium chloride, performing chloridizing roasting, performing water leaching on roasted clinker, and precipitating calcium ions by using sodium carbonate to obtain calcium-removed purified liquid; adjusting the pH value of the calcium-removed purified liquid, concentrating and crystallizing to separate out sodium chloride and potassium chloride crystals, and adding sodium carbonate into the crystallized mother liquid to precipitate lithium ions, thereby obtaining lithium carbonate precipitate. According to the method, the lepidolite can be chlorinated and converted into water-soluble chlorine salt at a lower temperature by using the special composite salt, so that efficient extraction of lithium is ...

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Номер записи: 1
28-04-2023 дата публикации

Preparation method of battery-grade hydrated iron phosphate

Номер: CN116022757A
Автор: ZHOU KANGGEN, LEI QINGYUAN, PENG CHANGHONG, CHEN WEI, QIU ZAIRONG
Принадлежит:

The invention discloses a preparation method of battery-grade ferric phosphate hydrate. The method comprises the following steps: adjusting the pH value of a ferrous sulfate solution to be less than 2, then adding monocalcium phosphate, maintaining the total phosphorus concentration in the ferrous sulfate solution to be less than 1mol/L, carrying out precipitation reaction for 1.0-3.0 hours at the temperature of 50-90 DEG C, and carrying out liquid-solid separation to obtain calcium sulfate slag and a ferrous phosphate solution; and adjusting the pH value and the iron/phosphorus ratio of the ferrous phosphate solution, adding hydrogen peroxide to carry out oxidation reaction, and carrying out solid-liquid separation and washing to obtain the battery-grade hydrated iron phosphate. According to the method, the cheap monocalcium phosphate is used as a phosphorus source and the ferrous sulfate wet slag is used as an iron source, so that the production cost of the battery-grade iron phosphate ...

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Номер записи: 2