DE702627C - Procedure to prevent the coloration during setting - Google Patents
Procedure to prevent the coloration during settingInfo
- Publication number
- DE702627C DE702627C DE1939D0080197 DED0080197D DE702627C DE 702627 C DE702627 C DE 702627C DE 1939D0080197 DE1939D0080197 DE 1939D0080197 DE D0080197 D DED0080197 D DE D0080197D DE 702627 C DE702627 C DE 702627C
- Authority
- DE
- Germany
- Prior art keywords
- sulfur
- procedure
- prevent
- during setting
- coloration during
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims 2
- 239000000126 substance Substances 0.000 claims 2
- 239000011400 blast furnace cement Substances 0.000 claims 1
- 238000003801 milling Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 150000003464 sulfur compounds Chemical class 0.000 description 6
- 239000002893 slag Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920001021 polysulfide Polymers 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 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
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- -1 polysulphides Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
Verfahren zur Verhinderung der während des Abbindens von Hochofenschlackenzementen eintretenden Blaufärbung Es ist bekannt, daß sich Hochofenschlakkenzemente während ihres Abbindens blau färben. Diese Verfärbung wird verursacht durch die Reaktion der in der Schlacke enthaltenen Schwefelverbindungen mit den in den Bestandteilen enthaltenen Eisenverbindungen. Wenn das Abbinden dieser Zemente in Gegenwart von Luft vor sich geht, oxydiert sich das gebildete Schwefeleisen schnell, und die Blaufärbung verschwindet. Gleichwohl zeigen die in Formen hergestellten oder unter Luftabschluß aufbewahrten Erzeugnisse die besagte Färbung und behalten sie so hinreichend lange, daß es schwierig ist, sie zu verkaufen.Method for preventing the setting of blast furnace slag cements occurring blue coloration It is known that blast furnace slag cements during color their setting blue. This discoloration is caused by the reaction the sulfur compounds contained in the slag with those in the constituents contained iron compounds. If the setting of these cements in the presence of In the presence of air, the sulphurous iron formed is rapidly oxidized, and the blue coloration disappears. Nonetheless, those produced in molds or in the absence of air show stored products have the said color and retain it for a sufficiently long time, that it is difficult to sell.
Der Zweck der Erfindung ist die Beseitigung dieses Nachteils. Man hat festgestellt, daß, wenn die niedrigen Schwefelverbindungen im basischen Medium eine Verbindung von dunkler Färbung ergeben, dies bei höher geschwefelten Verbindungen nicht der Fall ist. Es genügt daher, die niedrigen Schwefelverbindungen in höher geschwefelte Verbindungen überzuführen, um das Eintreten der Blaufärbung zu verhindern.The purpose of the invention is to eliminate this drawback. Man has found that when the low sulfur compounds are in the basic medium result in a compound of darker color, this with higher sulfur compounds is not the case. It is therefore sufficient to put the low sulfur compounds in higher transferring sulphurized compounds in order to prevent the occurrence of the blue coloration.
Um die niedrige Schwefelverbindung in eine höher geschwefelte Verbindung überzuführen, genügt es, während des Mahlens des Zements oder eines seiner Bestandteile oder in irgendeinem Augenblick seiner Verwendung Schwefel oder eine Schwefel leicht in Freiheit setzende Verbindung, wie Polysulfide, beispielsweise Calcium- oder Natriumpolysulfid, hinzuzufügen. i % freier Schwefel, bezogen auf die Menge der Hochofenschlacke, genügt in den meisten Fällen. Dies hängt ab von ihrem Schwefelgehalt.To convert the lower sulfur compound into a higher sulfur compound transfer, it is enough while grinding the cement or one of its components or at any moment of its use sulfur or a sulfur easily liberating compounds, such as polysulphides, for example calcium or sodium polysulphide, to add. i% free sulfur, based on the amount of blast furnace slag, is sufficient in most cases. This depends on their sulfur content.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1939D0080197 DE702627C (en) | 1939-04-05 | 1939-04-05 | Procedure to prevent the coloration during setting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1939D0080197 DE702627C (en) | 1939-04-05 | 1939-04-05 | Procedure to prevent the coloration during setting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE702627C true DE702627C (en) | 1941-02-12 |
Family
ID=7063196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1939D0080197 Expired DE702627C (en) | 1939-04-05 | 1939-04-05 | Procedure to prevent the coloration during setting |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE702627C (en) |
-
1939
- 1939-04-05 DE DE1939D0080197 patent/DE702627C/en not_active Expired
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