BG111737A - METHOD FOR THE PROCESSING OF COTTON SALTS - Google Patents

METHOD FOR THE PROCESSING OF COTTON SALTS

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Publication number
BG111737A
BG111737A BG111737A BG11173714A BG111737A BG 111737 A BG111737 A BG 111737A BG 111737 A BG111737 A BG 111737A BG 11173714 A BG11173714 A BG 11173714A BG 111737 A BG111737 A BG 111737A
Authority
BG
Bulgaria
Prior art keywords
subjected
liquid phase
degrees
temperature
gel
Prior art date
Application number
BG111737A
Other languages
Bulgarian (bg)
Other versions
BG66863B1 (en
Inventor
Стойко ГЮРОВ
Чавдар ГЕОРГИЕВ
Антон АСЕНОВ
Георги ГЮРОВ
Митко БЕЛОМОРСКИ
Петър АСЕНОВ
Original Assignee
"Еко Рикавъри" Оод
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by "Еко Рикавъри" Оод filed Critical "Еко Рикавъри" Оод
Priority to BG111737A priority Critical patent/BG66863B1/en
Publication of BG111737A publication Critical patent/BG111737A/en
Publication of BG66863B1 publication Critical patent/BG66863B1/en

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  • Processing Of Solid Wastes (AREA)

Abstract

Методът се използва за получаване на полезни продукти от промишлен отпадък от медното производство, с което се решава екологичен проблем, свързан с намаляване на количеството на отпадъчните продукти и разходите за тяхното депониране. Съдържащият се в шлаката фаялит се окислява и разпада до железни оксиди и силициев диоксид при температура от 800 до 850 градуса С и времетраене от 3 до 5 h. Окислената шлака се смесва с разтвор на натриев хидроксид във вода с концентрация 30 - 90 g/l и се подлага на извличане в автоклав при температура от 160 до 250 градуса C, автогенно налягане на водните пари от 0.6 до 4 МРа, при непрекъснато разбъркване и продължителност на процеса 3 - 9 h, при което силициевият диоксид се разтваря в натриевия хидроксид до получаване на реакционна течна фаза, съдържаща натриев силикат. Течната фаза се отделя, а твърдата фаза от железни оксиди се подлага на повторно извличане в автоклав, като се промива с вода при температура от 150 до 250 градуса C, автогенно налягане на водните пари от 0.6 до 4 МРа и при непрекъснато разбъркване. Получената суспензия се подлага на вакуумно филтруване, като твърдата фаза се отделя за пелетизиране, а течната фаза, представляваща разтвор на натриев силикат, се смесва с реакционната течна фаза от първото извличане и се подлага на обработка чрез подкиселяване със солна киселина до отделяне на колоиден силициев хидроксид, който полимеризира и кондензира до гел. Получената колоидна система се центрофугира, промива за отстраняване на разтворимите соли и филтрува за отделяне на гела, който се подлага на сушене до получаване на аморфен силициев оксид (силикагел) със зададени размери на зърната и повърхност. 4 претенции, 1 фигураThe method is used to obtain useful industrial copper waste products, which solves an ecological problem related to the reduction of the quantity of waste products and the cost of their disposal. The slag containing wool is oxidized and decomposed to iron oxides and silica at a temperature of 800 to 850 degrees C and a duration of 3 to 5 hours. The oxidized slag is mixed with a sodium hydroxide solution in 30-90 g / l water and subjected to an autoclave at a temperature of 160 to 250 degrees C, an autogenous vapor pressure of 0.6 to 4 MPa with continuous stirring, and a process duration of 3-9 hours, whereby the silicon dioxide is dissolved in the sodium hydroxide to form a reaction liquid phase containing sodium silicate. The liquid phase is separated and the solid phase of the iron oxides is subjected to re-extraction in an autoclave, washing with water at a temperature of 150 to 250 degrees C, autogenous vapor pressure of 0.6 to 4 MPa and with continuous stirring. The resulting suspension is subjected to vacuum filtration, the solid phase being separated for pelletization, and the liquid phase being a sodium silicate solution is mixed with the reaction liquid phase from the first extraction and subjected to acidification by hydrochloric acid to remove colloidal silicon hydroxide which polymerises and condenses to a gel. The resulting colloidal system is centrifuged, washed to remove soluble salts and filtered to remove the gel which is subjected to drying to give amorphous silica (silica gel) of defined grain size and surface area. 4 claims, 1 figure

BG111737A 2014-04-09 2014-04-09 Method for recycling slag from copper production BG66863B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BG111737A BG66863B1 (en) 2014-04-09 2014-04-09 Method for recycling slag from copper production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BG111737A BG66863B1 (en) 2014-04-09 2014-04-09 Method for recycling slag from copper production

Publications (2)

Publication Number Publication Date
BG111737A true BG111737A (en) 2015-10-30
BG66863B1 BG66863B1 (en) 2019-04-15

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ID=56847687

Family Applications (1)

Application Number Title Priority Date Filing Date
BG111737A BG66863B1 (en) 2014-04-09 2014-04-09 Method for recycling slag from copper production

Country Status (1)

Country Link
BG (1) BG66863B1 (en)

Also Published As

Publication number Publication date
BG66863B1 (en) 2019-04-15

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