PL13675B1 - A method of obtaining white cement from iron-containing raw materials. - Google Patents
A method of obtaining white cement from iron-containing raw materials. Download PDFInfo
- Publication number
- PL13675B1 PL13675B1 PL13675A PL1367530A PL13675B1 PL 13675 B1 PL13675 B1 PL 13675B1 PL 13675 A PL13675 A PL 13675A PL 1367530 A PL1367530 A PL 1367530A PL 13675 B1 PL13675 B1 PL 13675B1
- Authority
- PL
- Poland
- Prior art keywords
- raw materials
- iron
- containing raw
- white cement
- obtaining white
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 10
- 239000002994 raw material Substances 0.000 title claims description 7
- 239000004568 cement Substances 0.000 title claims description 6
- 229910052742 iron Inorganic materials 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 5
- 239000000571 coke Substances 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- AGVJBLHVMNHENQ-UHFFFAOYSA-N Calcium sulfide Chemical compound [S-2].[Ca+2] AGVJBLHVMNHENQ-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Description
Przedmiotem wynalazku niniejszego jest sposób otrzymywania bialego cemen¬ tu, wykazujacy w porównaniu z innemi sposobami te zalete, iz daje sie stosowac do wszelkich surowców, zawierajacych ze¬ lazo.Sposób niniejszy polega na tern, ze za¬ barwione, np. zawierajace zelazo surowce, przezinaiozioine do wypalenia na bialy ce¬ ment, wypala sie redukujaco z dodatkiem koksu lub innych srodków redukujacych, poczem otrzymany klinkier rozdrabia i u- suwa metaliczne zelazo znanym sposobem rozdzielania, a nastepnie stosuje sie utle¬ nianie rozdrobionych klinkierów w obec¬ nosci powietrza, tlenu lub srodków utle¬ niajacych.Np. zwykle surowce cementowe spieka sie lub stapia w piecu obrotowym z do¬ mieszka 6% koksu. W temperaturze okolo 700 do 900°C tlenki zelaza, w wytworzo¬ nej atmosferze tlenku wegla, ulegaja re¬ dukcji na metal, który w postaci drob¬ nych wyprysków lub kuleczek pozostaje w otrzymanym klinkierze. Po rozdrobieniu klinkieru czastki metalu usuwa sie zapo- moca magnesu, a nastepnie sproszkowana mase klinkieru ogrzewa sie przez pól go¬ dziny w przyblizeniu do 500°C, doprowa¬ dzajac powietrze. Przytem spala sie ewen¬ tualnie nadmiar koksu, a siarczek wapnia, wytworzony skutkiem domieszek siarki w paliwie, ulega utlenieniu na nieszkodliwy gips. Do surowców cementowych mozna o-czy wiscie dodawac jeszcze topników, w celu obiii££nia temperatury spiekania. PLThe subject of the present invention is a process for the preparation of white cement which, compared to other methods, has the advantage that it can be applied to all iron-containing raw materials. The present method consists of dyed, e.g. iron-containing raw materials, Thinning powder for firing into white cement, it burns reductively with the addition of coke or other reducing agents, then the obtained clinker is crushed and removed by a known separation method, and then oxidation of the fragmented clinkers in the presence of air, oxygen is used or oxidizing agents. usually the cement raw materials are sintered or melted in a rotary kiln with a mixture of 6% coke. At a temperature of about 700 to 900 ° C., the iron oxides, in the atmosphere of carbon monoxide formed, are reduced to metal, which remains in the obtained clinker in the form of small spots or balls. After grinding the clinker, the metal particles are removed by a magnet, and then the powdered mass of the clinker is heated for half an hour to approximately 500 ° C by the supply of air. Any excess coke is then burned, and the calcium sulphide produced by sulfur in the fuel is oxidized to form harmless gypsum. Fluxes can be added to the cement raw materials in order to lower the sintering temperature. PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL13675B1 true PL13675B1 (en) | 1931-05-30 |
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