BG111737A - METHOD FOR THE PROCESSING OF COTTON SALTS - Google Patents
METHOD FOR THE PROCESSING OF COTTON SALTSInfo
- 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
Links
Landscapes
- 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
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 |
Family
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) |
-
2014
- 2014-04-09 BG BG111737A patent/BG66863B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
BG66863B1 (en) | 2019-04-15 |
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