PL41897B1 - - Google Patents
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- Publication number
- PL41897B1 PL41897B1 PL41897A PL4189758A PL41897B1 PL 41897 B1 PL41897 B1 PL 41897B1 PL 41897 A PL41897 A PL 41897A PL 4189758 A PL4189758 A PL 4189758A PL 41897 B1 PL41897 B1 PL 41897B1
- Authority
- PL
- Poland
- Prior art keywords
- desulfurization
- lime
- pig iron
- electrode
- blast furnace
- Prior art date
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910000805 Pig iron Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 claims 1
- 239000010802 sludge Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- AGVJBLHVMNHENQ-UHFFFAOYSA-N Calcium sulfide Chemical compound [S-2].[Ca+2] AGVJBLHVMNHENQ-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Description
Opublikowano dal* 3t kwietat* M6» r £ ^ POLSKIEJ RZECZYPOSPOLITE) LUDOWEJ OPIS PATENTOWY Nr 41897 Wladyslaiu Kuczeiuski Czestochowa, Polaka Marian Janas Czestochowa, Polska /M/b,/!/OZ Sposób odsiarczania surówki poza wielkim piecem Patent trwa od dniia 11 pazdziernika 1958 r.Czesto surówka przeróbcza po spuscie z wiel¬ kiego pieca zawiera zbyt duzo siarka, aby z ta¬ kiej surówki w konwertorze toimasowskim, pie¬ cu majrtenowsMm lub elektrycznym mozna by¬ lo wytopic dobra stal bez ponoszenia dodatko¬ wych kosztów i bez znacznego uszczuplenia wy¬ dajnosci stalowni.Stosowane obecnie sposoby odsiarczania su¬ rówki po spuscie z wielkiego pieca — poza niedosc skutecznym a kosztownym odsiarcza¬ niem jej za pomoca sody lub innych zwiazków chemicznych — polegaja na tworzeniu w beb¬ nie (piecu) obrotowym mieszaniny metalu z roz¬ drobnionym wapnem, badz tez na wdmuchiwa¬ niu do metalu (znajdujacego sie w kadzi) za pomoca sprezonego azotu sproszkowanego wap¬ na. Kosztownosc i mala statecznosc powyzszych sposobów odsiarczania surówki poza wielkim piecem pochodzi stad, zie sam proces odsiarcza¬ nia, jako silnie endotermiczny, wymaga doply¬ wu ciepla i nie moze byc prowadzony w atmo¬ sferze utleniajacej, która kieruje reakcja w strone ponownego powstawania siarczku zelaza: FeS + CaO = CaS + FeO zamiast w strone tworzenia sie siarczku wap¬ nia. Dodatek mielonej elektrody weglowej po¬ zwala nie tylko na calkowite wyeliminowanie z produktów reakcji tlenku zelazawego (FeO) wedlug równania FeS + CaO + C = Cas .+ Fe + CO lecz jednoczesnie na wytwarzanie znacznych ilosci ciepla przez spalanie nadmiaru mielonej elektrody w sprezonym powietrzu wedlug wzo¬ ru: 2C + 02 = 2CO Z powyzszych rozwazan teioretyicznych wynikl nowy sposób odsiarczania surówki poza wiel-Mm piecem, który polega ma tym, ze na po¬ wierzchnie lub wglab surówki, nalanej do ka¬ dzi, wclmuchujer sie rurka stalowa silnie spre¬ zone powietrze wraz z dodatkiem sproszkowa¬ nego .wapnia i mielonej elektrody weglowej, wzietych w stosunku wagowym 1:1.Kadz moze byc przykryta staliwna pokrywa, wewnatirz wylozona cegla ogniotrwala. Nad po¬ wierzchnia lub w warstwie przypowierzchnio¬ wej surówki powstaje plomien plonacej elek¬ trody.Ilosc sproszkowanego wapnia i zmielonej elek¬ trody weglowej w sumie wynosi okolo 3% cie¬ zaru surówki.Do odkrzemiania surówki — zamiast zmie¬ lonej elektrody, która wobec egzotermicznosci reakcji Si + 2FeO = Si02 + 2Fe staje sie zbed¬ na — uzywa sie zmielonej rudy zelaza z dodat¬ kiem sproszkowanego wapna, wzdetych w sto¬ sunku wagowym 1:1. PLPublished on * 3t April * M6 »r £ ^ POLSKIEJ RZECZYPOSPOLITE) FOLK PATENT DESCRIPTION No. 41897 Wladyslaiu Kuczeiuski Czestochowa, Pole Marian Janas Czestochowa, Poland / M / b, /! / OZ Method of desulphurization of pig iron outside the blast furnace The patent lasts from October 11 1958 Often the pig iron after tapping from the blast furnace contains too much sulfur to allow such pig iron to be smelt good steel in a TIMASO convertor, factory or electric furnace without incurring additional costs and without significant costs. The currently used methods of desulphurization of the slurry after tapping the blast furnace - apart from the ineffective and costly desulphurization with soda or other chemical compounds - consist in creating a mixture of metal and metal in a rotary drum (furnace). with ground lime, or by blowing calcium into the metal (contained in the ladle) with compressed nitrogen. The cost-effectiveness and low stability of the above methods of pig iron desulphurization outside the blast furnace are due to the fact that the desulphurization process itself, being highly endothermic, requires a supply of heat and cannot be carried out in an oxidizing atmosphere which directs the reaction towards the re-formation of iron sulphide : FeS + CaO = CaS + FeO instead of towards the formation of calcium sulphide. The addition of a ground carbon electrode allows not only to completely eliminate ferrous oxide (FeO) from the reaction products according to the equation FeS + CaO + C = Cas. + Fe + CO, but at the same time to generate significant amounts of heat by burning excess ground electrode in compressed air according to from the formula: 2C + 02 = 2CO. From the above theoretical considerations, a new method of desulfurization of pig iron, outside a large-mm furnace, resulted in the fact that on the surfaces or in the depths of pig iron poured into the tub, a steel tube blown strongly The air is mixed with the addition of powdered lime and ground carbon electrode, taken in a weight ratio of 1: 1. The ladle may be covered with a steel cover, and inside with refractory brick. The flame of the burning electrode is formed above the surface or in the surface layer of the pig iron. The amount of powdered calcium and the ground carbon electrode in total is about 3% of the weight of the pig iron. the exothermicity of the reaction Si + 2FeO = SiO2 + 2Fe becomes unnecessary - ground iron ore is used with the addition of powdered lime, flattened in the ratio of 1: 1. PL
Claims (3)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL41897B1 true PL41897B1 (en) | 1959-02-15 |
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