PL29680B1 - Method of desulfurization and purification of pig iron and steel - Google Patents
Method of desulfurization and purification of pig iron and steel Download PDFInfo
- Publication number
- PL29680B1 PL29680B1 PL29680A PL2968038A PL29680B1 PL 29680 B1 PL29680 B1 PL 29680B1 PL 29680 A PL29680 A PL 29680A PL 2968038 A PL2968038 A PL 2968038A PL 29680 B1 PL29680 B1 PL 29680B1
- Authority
- PL
- Poland
- Prior art keywords
- soda
- lime
- pig iron
- desulfurization
- mixture
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- 229910000805 Pig iron Inorganic materials 0.000 title claims description 6
- 229910000831 Steel Inorganic materials 0.000 title claims description 4
- 238000006477 desulfuration reaction Methods 0.000 title claims description 4
- 230000023556 desulfurization Effects 0.000 title claims description 4
- 239000010959 steel Substances 0.000 title claims description 4
- 238000000746 purification Methods 0.000 title claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 19
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 13
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 13
- 239000004571 lime Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims 1
- 240000006909 Tilia x europaea Species 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000015142 cultured sour cream Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Description
Znane jest odsiarkowywanie cieklej su¬ rówki bezposrednio po spuscie jej z wiel¬ kiego pieca za pomoca sody. Próbowano równiez stosowac wapno jako srodek od- siarkowujacy.Dodanie sody w postaci znajdujacej sie zwykle w handlu do kapieli metalowej po¬ woduje burzliwy przebieg reakcji oraz tak duze rozpylenie sody wskutek wzrostu tem¬ peratury, ze czesc sody zostaje bezuzytecz¬ nie rozproszona i uniesiona przez gazy.Strata sody jest tym wieksza, im bardziej jest ona rozdrobniona. Próbowano usunac te wade przez zastosowanie sody w stanie cieklym. Jednak topienie sody powoduje dodatkowe znaczne zwiekszenie kosztów, zwiazanych ze stosowaniem dodatkowego paliwa oraz urzadzenia odpowiednich zbiorników.Wedlug wynalazku usuwa sie te niedo¬ godnosci latwo i bez duzych kosztów w ten sposób, ze do odsiarkowywania i oczyszcza¬ nia cieklej surówki lub stali stosuje sie tak dokladna mieszanine rozdrobnionej so¬ dy i wilgotnego wapna tluczocego, ze soda otacza poszczególne szczatki wapna i two¬ rzy na nich skorupe, wskutek czego lekka soda jest mocno przyczepiona do ciezkiego wapna. Soda, w razie potrzeby, przed zmie¬ szaniem z tluczonym wapnem moze byc równiez nieznacznie zwilzona. Krystalicz¬ na soda nie odpowiada tym wymaganiom, poniewaz wskutek zawartosci w niej wody krystalicznej" przy zetknieciu z ciekla su-rówka lub stala rozpadalaby sie, ilosc zas wprowadzonej wody bylaby tak duza, iz kapiel metalowa za bardzo ochlodzilaby sie i nie osiagnietoby zadanego wyniku.Sposób wedlug wynalazku ma duze za¬ lety. Umozliwia on zaoszczedzenie sody, po¬ niewaz tanie tluczone wapno wspóldziala w odsiarkowywaniu. Usuwanie zuzla z kadzi odlewniczej jest równiez latwiejsze, ponie¬ waz zwykle bardzo rzadki (wodnisty) zu¬ zel sodowy zostaje zgeszczony wprowadzo¬ nym wapnem. Zwiazanie sody z tluczonym wapnem wstrzymuje zbyt samorzutna re¬ akcje i powoduje równomierne, ciagle przemieszanie kapieli metalowej. Wskutek rozlozenia tylko nieznacznej ilosci wody re¬ dukuja sie zanieczyszczenia zawieszone w surówce w postaci zuzli i tlenków, które nastepnie wyplywaja z kapieli na powie¬ rzchnie i moga byc latwo usuniete.Okazalo sie, ze surówka traktowana sposobem wedlug wynalazku niniejszego jest niezwykle czysta i moze byc dzieki te¬ mu przerabiana na wysoko wartosciowe stale.Sposób wedlug wynalazku posiada szczególne zalety przy oczyszczaniu surów¬ ki wytwarzanej z rud, zawierajacych malo manganu, z których zwykle otrzymuje sie surówke, zawierajaca wiecej siarki, i stale mniej czysta. PLIt is known to desulphurize liquid sour cream directly after tapping it from the blast furnace with the aid of soda. Attempts have also been made to use lime as a desulphurizing agent. The addition of soda in the form usually commercially available to a metal bath causes a turbulent reaction and a large spray of the soda due to the temperature rise that a part of the soda is dispersed and carried away without use. The greater the loss of baking soda, the finer it is crushed. Attempts have been made to remove these disadvantages by using liquid soda. However, the melting of soda causes an additional significant increase in costs associated with the use of additional fuel and the installation of suitable tanks. According to the invention, these inconveniences are eliminated easily and without great expense in that the desulfurization and purification of liquid pig iron or steel is used in such a way an exact mixture of ground soda and wet grinding lime, where the soda surrounds the individual limes of lime and forms a crust on them, whereby the light soda firmly adheres to the heavy lime. The soda, if desired, may also be slightly moist before mixing with the crushed lime. Crystalline soda does not meet these requirements because, due to its content of crystalline water, it would disintegrate on contact with liquid soda or solid, and the amount of water introduced would be so large that the metal bath would cool too much and would not achieve the desired result. The method according to the invention has great advantages: it saves soda, because cheap crushed lime contributes to the desulfurization. Removal of the slag from the pouring ladle is also easier because the usually very thin (watery) sodium gel is condensed into The binding of the soda with the crushed lime stops the reaction from being too spontaneous and causes an even, continuous stirring of the metal bath. ¬ Cough and can be easily removed. It turned out that the pig iron treated according to the invention This method is extremely pure and can therefore be processed into high-quality steels. The process according to the invention has particular advantages in the treatment of pig iron produced from ores containing little manganese, from which pig iron is usually obtained, containing more sulfur, and constantly less. clean. PL
Claims (3)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL29680B1 true PL29680B1 (en) | 1941-04-30 |
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100543153C (en) | Composite sphere for desulfurization and removal of fine inclusions in out-of-furnace refining and its preparation method | |
| PL29680B1 (en) | Method of desulfurization and purification of pig iron and steel | |
| US2662819A (en) | Production of transformer and dynamo steels | |
| JPS5816007A (en) | Dephosphorizing and desulfurizing method for molten iron | |
| US1717153A (en) | Method of desulphurizing steel | |
| US2146926A (en) | Method for the removal of sulphur from molten ferrous metal | |
| US1594424A (en) | Method of refining metals | |
| DE837705C (en) | Calcium cyanamide as a desulphurizing agent | |
| GB460138A (en) | Improvements in and relating to the manufacture of iron | |
| US2345222A (en) | Production of steel | |
| JPH06279817A (en) | Sulfur-containing aqueous solution for reduction and neutralization extracted from sulfur-containing slag | |
| US2462871A (en) | Treating agent | |
| DE699673C (en) | Process for desulphurising and cleaning iron baths | |
| US2104890A (en) | Process of separating from pig-iron the vanadium contained therein | |
| GB508539A (en) | Improvements in processes and apparatus for desulphurising pig iron | |
| CN110616320B (en) | A kind of method for desilication from siliceous ore or slag | |
| US226143A (en) | Dephosphorizing iron in the puddling process | |
| US2147206A (en) | Process for dephosphorizing and desulphurizing steel | |
| US2021159A (en) | Method of increasing carbon content of iron | |
| DE767917C (en) | Process for desulphurising pig iron with soda or masses containing soda | |
| SU106290A1 (en) | The method of desulfurization and dephosphorization of iron and steel by blowing metal with oxygen | |
| US2730442A (en) | Method of dephosphorizing and refining thomas and bessemer steels | |
| DE895606C (en) | Desulfurization of blast furnace pig iron and cupola iron | |
| Gavanescu | Refining of steel by using synthetic slag | |
| JPS58213811A (en) | Preliminary treatment of molten iron |