PL29144B1 - The method of briquetting silica burners. - Google Patents
The method of briquetting silica burners. Download PDFInfo
- Publication number
- PL29144B1 PL29144B1 PL29144A PL2914436A PL29144B1 PL 29144 B1 PL29144 B1 PL 29144B1 PL 29144 A PL29144 A PL 29144A PL 2914436 A PL2914436 A PL 2914436A PL 29144 B1 PL29144 B1 PL 29144B1
- Authority
- PL
- Poland
- Prior art keywords
- burners
- briquetting
- silica
- containing carbohydrates
- binders containing
- Prior art date
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims description 8
- 239000000377 silicon dioxide Substances 0.000 title claims description 4
- 239000011230 binding agent Substances 0.000 claims description 5
- 150000001720 carbohydrates Chemical class 0.000 claims description 4
- 235000014633 carbohydrates Nutrition 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 235000000346 sugar Nutrition 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 230000000717 retained Effects 0.000 claims 1
- 150000008163 sugars Chemical class 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 241000272201 Columbiformes Species 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N D-sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229960004793 Sucrose Drugs 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- -1 beetroot sugar Chemical class 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 150000004676 glycans Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013379 molasses Nutrition 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 150000004804 polysaccharides Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
Description
Wyzyskiwaniu wypalków krzemionko¬ wych w przemysle hutniczym dotychczas staly na przeszkodzie niekorzystne wlasci¬ wosci tych materialów, zwlaszcza ich kru¬ chosc.Wprawdzie próbowano juz usunac te niedogodnosc przez brykietowanie lub ksztaltowanie w inny sposób wypalków po zmieszaniu ich z innymi odpadkami, za¬ wierajacymi zelazo.Jednakze powyzsze zabiegi nie daly po¬ zadanych wyników, poniewaz otrzymywa¬ ne przy tym ksztaltki nie odpowiadaly wy¬ maganiom pod wzgledem swego skladu, kruszenia sie podczas przewozu oraz wy¬ trzymalosci na dzialanie ciepla w wyso¬ kiej temperaturze.Obecnie stwierdzono, ze wady te moz¬ na usunac w prosty sposób, jezeli przy za¬ stosowaniu znanego sposobu brykietowa¬ nia wypalków po uprzednim oddzieleniu, w razie potrzeby, znajdujacych sie w nich metali zanieczyszczajacych, jak miedzi, cynku itd., oraz po ewentualnym wylugo¬ waniu soli rozpuszczalnych w wodzie, u- zywa sie srodków wiazacych, zawieraja¬ cych weglowodany. Otrzymane ksztaltki poddaje sie nastepnie obróbce cieplnej w umiarkowanie podwyzszonej temperatu¬ rze.Jako srodki wiazace wedlug wynalaz¬ ku niniejszego stosuje sie przede wszyst¬ kim jedno- i wielocukry, jak cukier bura¬ czany, cukier trzcinowy, dekstryny itd.,ewentualnie zmieszane z innymi materia¬ lami wiazacymi.W ten sposób otrzymuje sie brykiety, które daja sie przechowywac bez zmian i sa odporne na sciskanie. Takie brykie¬ ty przy uzyciu ich w wielkich piecach po¬ mimo swej porowatosci nie krusza sie wcale, lecz rozpadaja sie tylko na grubsze kawalki.Przyklad. Wyplawione wypalki krze¬ mionkowe, zawierajac Fe — 65%, Cu — 0,2%, Zn — 0,4%, As — 0,03%, Mn — 0,06% i S — 0,8%, wylugowuje sie roz¬ cienczonym kwasem siarkowym w pod¬ wyzszonej temperaturze. Nastepnie sole wymywa sie. 100 kg otrzymanych w ten sposób wy- palków, wysuszonych do zawartosci w nich 3 — 5% wody, miesza sie dokladnie % roz¬ tworem, skladajacym sie z 4 kg cukru lub 8 kg melasy i 4 1 wzglednie 2 1 wody. Na¬ stepnie otrzymana mieszanine ksztaltuje sie za pomoca prasy brykietowej na bry¬ kiety o wielkosci np. golebich jaj i suszy sie je, az do skarmelizowania sie weglo¬ wodanowych srodków wiazacych, w cia¬ gu okolo 2 godzin w temperaturze okolo 200 — 300°C.Brykiety, otrzymane w ten sposób, wy¬ kazuja duza wytrzymalosc na sciskanie, daja sie przechowywac bez zmian i wyka¬ zuja w wysokiej temperaturze, panujacej w wielkich piecach, duza twardosc, przy czym sa porowate, a jednoczesnie prze¬ puszczaja gazy. PLUntil now, the unfavorable properties of these materials, especially their brittleness, have prevented the exploitation of silica burners in the steel industry, although attempts have been made to remove this inconvenience by briquetting or otherwise shaping the burnouts after mixing them with other waste containing iron. However, the above treatments did not give the desired results, because the resulting shapes did not meet the requirements with regard to their composition, crumbling during transport and resistance to heat at high temperature. these can be removed in a simple manner, if using the known method of briquetting the burnout after separating, if necessary, the contaminating metals contained therein, such as copper, zinc, etc., and, if necessary, pouring out soluble salts in water, binders containing carbohydrates are used. The resulting shapes are then subjected to heat treatment at a moderately elevated temperature. The binders according to the present invention are primarily monosaccharides and polysaccharides such as beetroot sugar, cane sugar, dextrins, etc., optionally mixed with others. In this way, you get briquettes that can be stored without changes and are resistant to compression. Such briquettes when used in blast furnaces, despite their porosity, do not crumble at all, but break up only into thicker pieces. Example. Weathered silica burners, containing Fe - 65%, Cu - 0.2%, Zn - 0.4%, As - 0.03%, Mn - 0.06% and S - 0.8%, With thinned sulfuric acid at an elevated temperature. The salts are then washed away. 100 kg of the inclusions obtained in this way, dried to a water content of 3-5%, are mixed with an exactly% solution consisting of 4 kg of sugar or 8 kg of molasses and 4 l or 21 of water. The resulting mixture is then shaped with a briquette press into briquettes of the size of, for example, pigeons and dried until the caramelization of the carbohydrate binders is carried out in about 2 hours at a temperature of about 200-300 ° C C. The briquettes obtained in this way exhibit high compressive strength, can be stored unchanged, and exhibit a high temperature in blast furnaces, high hardness, being porous and gas-permeable at the same time. PL
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL29144B1 true PL29144B1 (en) | 1940-07-31 |
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