Method for Handling A Slag Pot Or Ladle and Pyrometallurgical Tools
AssigneeS. A. Lhoist Recherche et Developpement
InventorGuillaume DENOLLIN
Life of this patent
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Abstract
A method is shown for handling a slag pot or ladle and pyrometallurgical tools made form steel or cast iron, comprising the steps of spraying a mineral suspension onto a wall and bringing said slag pot or ladle or the pyrometallurgical tool into service, wherein said mineral suspension comprises calcic particles in suspension in an aqueous phase forming a calcic particle milk having a calcic particle content of between 20% and 60% by weight with respect to the weight of said calcic particle milk, said mineral layer being a fine layer.
Claims22
A method for handling a slag pot or ladle being a steel or cast-iron pot or ladle comprising an internal wall and an external wall, said method comprising the steps of:
- a) collecting slag in said slag pot or ladle of a pyrometallurgic tool,
- b) transporting said slag pot or ladle from said pyrometallurgic tool to said slag deposition site,
- c) emptying said pot or ladle at said slag-deposition site in order to eliminate the slag that it contains,
- d) spraying of a mineral suspension on said internal wall of said slag pot or ladle, prior to at least one step of said collection of said slag, so as to line said internal wall with a mineral layer, and
- e) bringing said slag pot or ladle lined with said mineral layer into service with a view to the collection of the slag set out in paragraph a) above,
- wherein said mineral suspension comprises calcic particles in suspension in an aqueous phase forming a calcic-particle milk, said calcic particles being chosen from the group consisting of slaked lime, at least partially slaked decarbonated dolomite, limestone and mixtures thereof, and having a calcic particle content of between 20% and 60% by weight with respect to the weight of said calcic-particle milk, said calcic particles in the calcic particle milk of said mineral suspension having a mean particle size d50 of between 1.5 μm and 10 μm and wherein said mineral layer is a fine layer coated on the internal wall, the layer having a layer thickness of between 0.1 and 5 mm.
(canceled)
A method for lining an internal wall of a slag pot or ladle made from steel or cast iron with a mineral layer of calcic particle milk using a milk, wherein the milk of calcic particles is selected from the group consisting of slaked lime, at least partially slaked decarbonated dolomite, limestone and mixtures thereof in which said calcic particle milk is sprayed to form a fine mineral layer of calcic particles and has a calcic particle content of between 20% and 60% by weight with respect to the total weight of the calcic particle milk, said fine mineral layer of calcic particles having a layer thickness of between 0.1 and 5 mm and said calcic particles of said mineral suspension having a mean particle size d50 of between 1.5 μm and 10 μm.
13-15. (canceled)
22-42. (canceled)
A milk of calcic particles selected from the group consisting of slaked lime, at least partially slaked decarbonated dolomite, limestone and mixtures thereof in which said milk of calcic particles is sprayed and has a calcic particle content of between 20% and 60% by weight with respect to the total weight of the calcic particle milk, the sprayed milk of calcic particles forming a fine mineral layer of calcic particles having a layer thickness of between 0.1 and 5 mm, and said calcic particles forming said mineral layer having a mean particle size d50 of between 1.5 μm and 10 μm.
Dependencies are inferred from the claim text.