DE511520C - Process for rendering sulfur compounds harmless in melt fluids from rock phosphates, especially in melt cements - Google Patents

Process for rendering sulfur compounds harmless in melt fluids from rock phosphates, especially in melt cements

Info

Publication number
DE511520C
DE511520C DEK108532D DEK0108532D DE511520C DE 511520 C DE511520 C DE 511520C DE K108532 D DEK108532 D DE K108532D DE K0108532 D DEK0108532 D DE K0108532D DE 511520 C DE511520 C DE 511520C
Authority
DE
Germany
Prior art keywords
melt
cements
rendering
sulfur compounds
fluids
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
Application number
DEK108532D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WLADIMIR KYBER DIPL ING
Original Assignee
WLADIMIR KYBER DIPL ING
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WLADIMIR KYBER DIPL ING filed Critical WLADIMIR KYBER DIPL ING
Priority to DEK108532D priority Critical patent/DE511520C/en
Application granted granted Critical
Publication of DE511520C publication Critical patent/DE511520C/en
Expired legal-status Critical Current

Links

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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/60—Methods for eliminating alkali metals or compounds thereof, e.g. from the raw materials or during the burning process; methods for eliminating other harmful components
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
    • C04B7/42—Active ingredients added before, or during, the burning process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (AREA)
  • Toxicology (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

Verfahren zum Unschädlichmachen von Schwefelverbindungen in Schmelzflüssen aus Rohphosphaten, insbesondere in Schmelzzementen Bei Schlacken, die zur Weiterverarbeitung auf Zemente bestimmt sind, aber auch bei gewissen Sorten von Schmelzzementen ergibt sich. der Nachteil, :daß bei diesen Schlacken oder Schmelzzementen beim Anmachen mit Wasser eine sich unangenehm bemerkbar machende Schwefelwasserstoff entwicklung stattfindet. Die Schwefelwasserstoff entwickelnden Verbindungen haben außerdem noch den Nachteil, daß durch sie die Festigkeit der Zemente ungünstig beeinflußt wird.Process for rendering sulfur compounds harmless in melt rivers from rock phosphates, especially in molten cements are intended for cements, but also results in certain types of molten cement themselves. the disadvantage: that with these slags or molten cements when mixing with water an unpleasantly noticeable evolution of hydrogen sulfide takes place. The compounds that evolve hydrogen sulfide also have the disadvantage that they adversely affect the strength of the cements.

Es hat sich nun gezeigt, daß man :diese Schwefelwasserstoff entwickelnden Verbindungen so umlagern kann, ,daß die Schwefelwasserstoffentwicklung fast vollkommen vermieden wird.It has now been shown that: these evolve hydrogen sulphide Can rearrange compounds in such a way that the evolution of hydrogen sulfide is almost complete is avoided.

Zu dem Zweck mischt man entweder vor dem Schmelzfluß der Beschickung selbst oder aber, was noch wirksamer ist, dem fertigen Schmelzfluß Magnesiumoxyd zu, so daß sich dieses mit der Schmelze verbindet.To this end, either mixing is carried out prior to the melt flow of the charge itself or, what is still more effective, the finished melt flow magnesium oxide to, so that this connects to the melt.

Versuche ergaben, daß beispielsweise ein Zusatz von 3 Prozent Magnesiumoxyd, welcher der aus dem Prozeß einer gleichzeitigen Herstellung von. Phosphorsäure und Schmelzzement entstammenden flüssigen Schlacke hinzugefügt wurde, die Schwefelwasserstoffentwicklung beim Anmachen :der Schlacke mit Wasser um 17 Prozent herunterdrückte, während eine Reduktion um 30 Prozent nachzuweisen war, wenn diese 3 Prozent Magnesiumoxyd vor dem Schmelzfluß der Beschickung selbst hinzugefügt wurden.Tests have shown that, for example, an addition of 3 percent magnesium oxide, which is the result of the process of simultaneous production of. Liquid slag derived from phosphoric acid and molten cement was added, which produced hydrogen sulphide during mixing: the slag was lowered by 17 percent with water, while a reduction of 30 percent was demonstrated when this 3 percent magnesium oxide was added to the feed itself before the melt flow.

Die Schwefelwasserstoffentwicklung wird noch weiter unterdrückt :durch erhöhte Zugabe von Magnesiumoxyd.The evolution of hydrogen sulfide is suppressed even further: by increased addition of magnesium oxide.

Claims (1)

PATENTANSPRUCI3: Verfahren zum Unschädlichmachen von Schwefelverbindungen in Schmelzflüssen aus Rohphosphaten, insbesondere in Schmelzzementen, dadurch gekennzeichnet, .daß man entweder der betreffenden Beschickung oder aber dem entstandenen Schmelzfluß Magnesiumoxyd zugibt.PATENT CLAIM3: Process for rendering sulfur compounds harmless in melt flows from rock phosphates, in particular in melt cements, characterized in that .that either the relevant charge or the resulting melt flow Magnesium oxide admits.
DEK108532D 1928-03-20 1928-03-20 Process for rendering sulfur compounds harmless in melt fluids from rock phosphates, especially in melt cements Expired DE511520C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK108532D DE511520C (en) 1928-03-20 1928-03-20 Process for rendering sulfur compounds harmless in melt fluids from rock phosphates, especially in melt cements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK108532D DE511520C (en) 1928-03-20 1928-03-20 Process for rendering sulfur compounds harmless in melt fluids from rock phosphates, especially in melt cements

Publications (1)

Publication Number Publication Date
DE511520C true DE511520C (en) 1930-10-30

Family

ID=7241440

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK108532D Expired DE511520C (en) 1928-03-20 1928-03-20 Process for rendering sulfur compounds harmless in melt fluids from rock phosphates, especially in melt cements

Country Status (1)

Country Link
DE (1) DE511520C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1051713B (en) * 1956-04-16 1959-02-26 Herbert A R Zehrlaut Process for the treatment of calcium aluminate cement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1051713B (en) * 1956-04-16 1959-02-26 Herbert A R Zehrlaut Process for the treatment of calcium aluminate cement

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