Method for treating material formed/found at the bottom of a ladle furnace is provided. The material includes white slag containing lime or lime-based compounds and also includes a metal alloy in the molten or semi-molten/viscous state. The material at the outlet of the ladle furnace cools for a period of time less than about 30-45 minutes.

A roller treatment process and a treatment device suitable for a total-amount steel slag treatment. The treatment process is: firstly, a slag tank (2) with the molten slag is tightly held by a slag tank tilting mechanism and moved to a slag inlet position, the slag tank (2) is tilted to pour the molten slag with good fluidity into a rotary roller device (5) through a feeding chute (51), so that a roller treatment is achieved; secondly, when the steel slag (3) without fluidity in the slag tank (2) cannot flow out, a slag removal machine (4) is used for pushing the high-viscosity slag or the solid slag into the roller device (5); and thirdly, the slag tank (2) is reversed by a large angle tilting to make the slag at the bottom of the tank drop into the roller device (5), so that the total-amount steel slag treatment of the same roller device (5) is achieved. The treatment device comprises a feeding system, the roller device (5), a particle slag conveying and storage system (7), a tail gas emission and purification system (6), a cooling water circulation system (8), a cold steel cleaning mechanism (10) and an electric control system (9); and the feeding system comprises the slag tank tilting mechanism (1), the slag tank (2), the molten slag (3) and the slag removal machine (4).

A method and apparatus for direct drying of inorganic sludge with a drum drawing process, comprising the following steps: 1) drum mixed drying of slag and sludge: respectively conveying the slag and sludge into a drum (1) in proportion, completing mixing, heat exchange, dehydration, cooling and crushing of the slag and sludge under the rolling action of the drum (1) and a steel ball to achieve cooling, crushing and drying of the slag and sludge, and directly discharging the obtained mixture; 2) slag and sludge separation: separating the steel slag and dry sludge in a manner of combining screening and rotary separation; 3) tail gas treatment: treating dusts, sulfides and organic compounds in tail gas generated by the dry sludge by using wet alkali washing and activated carbon adsorption, and discharging the treated tail gas; and 4) tailing sludge treatment: generating steam and dusts in the drum treatment of the slag and sludge, allowing dusts to enter a tail gas treatment device (4) with steam, aggregating the dusts after wet washing or spraying, and then conveying into a tailing sludge blending device (5) by means of a conveying device, mixing and stirring the tailing sludge and original sludge, conveying the obtained mixture into the drum (1), and drying the mixture to realize zero discharge of undried sludge.

A plant for the treatment and recovery of white slag resulting from steelmaking processes. The plant including at least one basic frame; at least one work chamber, movable in rotation around a relevant axis and configured to receive and treat the white slag, the latter being moved forward along at least one direction of treatment. The work chamber including at least one loading portion through which said white slag is loaded; at least one cooling portion arranged downstream of said loading portion and comprising at least one treatment channel of said white slag; and cooling device/structure/component/or the like comprising at least one coolant to cool said white slag to obtain at least one recovery powder; and at least one sorting and separation portion of the recovery powder arranged.

A liquid slag granulating system includes a granulator (1), a granulator connecting part and a granulator drive part. The granulator (1) is disc-shaped or cup-shaped, and a diversion cone is arranged at a center of the granulator (1). The granulator drive part drives the granulator to rotate, thus granulating liquid slag. The system further includes an air supply part.

A method and apparatus for direct drying of inorganic sludge with a drum drawing process, comprising the following steps: 1) drum mixed drying of slag and sludge: respectively conveying the slag and sludge into a drum (1) in proportion, completing mixing, heat exchange, dehydration, cooling and crushing of the slag and sludge under the rolling action of the drum (1) and a steel ball to achieve cooling, crushing and drying of the slag and sludge, and directly discharging the obtained mixture; 2) slag and sludge separation: separating the steel slag and dry sludge in a manner of combining screening and rotary separation; 3) tail gas treatment: treating dusts, sulfides and organic compounds in tail gas generated by the dry sludge by using wet alkali washing and activated carbon adsorption, and discharging the treated tail gas; and 4) tailing sludge treatment: generating steam and dusts in the drum treatment of the slag and sludge, allowing dusts to enter a tail gas treatment device (4) with steam, aggregating the dusts after wet washing or spraying, and then conveying into a tailing sludge blending device (5) by means of a conveying device, mixing and stirring the tailing sludge and original sludge, conveying the obtained mixture into the drum (1), and drying the mixture to realize zero discharge of undried sludge.

A nozzle, a tundish arrangement used for the production of granulated material, and a method and apparatus for the production of a granulated material with an improved size distribution are provided. The grain size and grain size distribution is controlled by a nozzle having a specific design. The nozzle comprises an upper inlet opening, sidewalls forming a channel, a bottom and at least one outlet opening or at least one row of outlet openings at the lower end of the channel. The outlet opening(s) in the channel have a size of at least 5 mm in the smallest dimension. A cross sectional area of the channel at the inlet A.sub.C is at least 3 times bigger than the total area of the outlet openings A.sub.T.

A method for the treatment of black slag, which contains lime (CaO) or lime-based compounds, and which is generated in an electric furnace that produces steel from scrap, includes indirectly cooling the black slag immediately after the black slag exits from the electric furnace or after collection of the black slag in a cauldron, for a period of time between about 10 minutes and about 45 minutes.

A roller treatment process and a treatment device suitable for a total-amount steel slag treatment. The treatment process is: firstly, a slag tank (2) with the molten slag is tightly held by a slag tank tilting mechanism and moved to a slag inlet position, the slag tank (2) is tilted to pour the molten slag with good fluidity into a rotary roller device (5) through a feeding chute (51), so that a roller treatment is achieved; secondly, when the steel slag (3) without fluidity in the slag tank (2) cannot flow out, a slag removal machine (4) is used for pushing the high-viscosity slag or the solid slag into the roller device (5); and thirdly, the slag tank (2) is reversed by a large angle tilting to make the slag at the bottom of the tank drop into the roller device (5), so that the total-amount steel slag treatment of the same roller device (5) is achieved. The treatment device comprises a feeding system, the roller device (5), a particle slag conveying and storage system (7), a tail gas emission and purification system (6), a cooling water circulation system (8), a cold steel cleaning mechanism (10) and an electric control system (9); and the feeding system comprises the slag tank tilting mechanism (1), the slag tank (2), the molten slag (3) and the slag removal machine (4).

A method for the treatment of black slag, which contains lime (CaO) or lime-based compounds, and which is generated in an electric furnace that produces steel from scrap, includes indirectly cooling the black slag immediately after the black slag exits from the electric furnace or after collection of the black slag in a cauldron, for a period of time between about 10 minutes and about 45 minutes.