Disclosed is a comprehensive recovery method for a complex material containing arsenic and valuable metal slags, comprising passing the materials containing arsenic through a primary rotating kiln to volatilize the arsenic, and through a secondary rotating kiln to purify the arsenic, so that an arsenic product containing 99.5% As₂O₃ is produced; reduction smelting slags from the primary and secondary rotating kilns in a blowing volatilization furnace, with the resultant highly arsenious dust being returned to the primary rotating kiln for treatment, and the slags being used as a raw material in a cement manufactory and a raw material for zinc after undergoing strongly reductive dearsenization and volatilization of zinc in a fuming furnace; the resultant alloy containing arsenic being subjected to basic oxidizing refinement, and the oxidized/refined alloy after dearsenizations containing Pb > 72%, Sb > 12%, As₂O₃ <0.02%, being sold as a lead-antimony alloy; the basic slags from the refinement, containing As₂O₃ 10%-20%, being subjected to crushing, dissolution in base, and filtration, with the slags thereof being returned to a blowing volatilization furnace for treatment; precipitating tin from the basic solution containing tin and arsenic by blowing in CO₂, with the filtered tin oxide being sold as a raw material for tin; adding Ca(OH)₂ into the basic filtrate containing arsenic to precipitate arsenic, returning the filtered slags of calcium arsenate to the primary rotating kiln for treatment, and evaporating the remaining basic solution to concentrate and recover the base.

The invention relates to steel production in the steel and iron industry. The inventive method consists in dividing a solid slag stream which flows from a metallurgical vessel and falls down, into individual streams along the solid stream, in forcedly cooling the thus obtained individual streams, in dividing the individual streams into parts (pieces) by cutting across the movement thereof, in forcedly cooling said parts and transferring to a belt conveyor, on which said separate parts/pieces are forcedly cooled and transported away from the vessel. A shaped (with containers) conveyor belt, on which the slag pieces are crushed by means of a cylindrical roll, is used for additional crushing. The inventive device for carrying out the totality of the above-listed operations, comprises at least three throat grates which are horizontally positioned in an assembled body and one of which is provided with a drive for carrying out reciprocating motion. The device also comprises a drive for displacing to/from the vessel. In the position closet to the vessel, the device is fed with air and water from a stationary plant for forcedly cooling the individual slam streams and the parts (pieces) of slam. The throat grate displacing drives and a conveyor belt drive are mounted on the device assembled body, and the roll and a drive for rotating it, when the shaped belt is used, are fastened thereto. The ribs of the throat grate are made from tensioned steel ropes.

This invention relates to a process and system for treating ultra fine powder steel slag, which comprises: collecting the steel slag into a tank and carrying the tank onto a tipping device by a hoisting equipment; operating the tipping device to transport the steel slag to a granulating device and granulating the steel slag in the granulating device to form granulated slag; transporting the granulated slag into a drying room with a conveyor, wherein the granulated slag is continuously dried in the drying room at a temperature between 200 - 300°C for 30-60 seconds using exhaust heat from a converter; and transporting dried granulated slag, with the conveyor, to a magnetic separation device to separate carbon metal grains from nonmetal grains contained in the granulated slag.

Bei einem Verfahren zur Abreicherung von Alkalien und/oder Schwermetallen in oxidischen Schmelzen, bei welchen die Schmelzen, wie z.B. schmelzflüssige Müllverbrennungsschlacken, Stahlschlacken und/oder Hochofenschlacken versprüht und anschließend gekühlt werden, wird die Temperatur der flüssigen Schmelzen am Austritt einer Sprühdüse wenigstens 50°C, vorzugsweise etwa 150°C über dem Liquidus-Temperatur-Bereich der zu versprühenden Schmelzen eingestellt, wobei die im Anschluss an das Versprühen erstarrten Partikel einem mechanischen Trennverfahren zur Trennung von faserartigen und tropfen- bzw. kugelförmigen Strukturen unterworfen werden.

There are described methods and apparatus for aging steel-making slag, in which slag is crushed to a predominant particle size of 25 mm or less and hydrated with saturated steam under controlled conditions.

Verfahren zur Herstellung von Aluminiumoxid-Kalzinaten, gekennzeichnet durch die folgenden Schritte: Bereitstellen eines Aluminiumoxid-haltigen Ausgangsmaterials, insbesondere eines Aluminiumoxid-haltigen Konzentrates einer aufbereiteten Aluminiumsalzschlacke, und Kalzinieren des Aluminiumoxid-haltigen Ausgangsmaterials in einem kippbaren Drehtrommelofen (10) zu einem teilweise oder vollständig kalzinierten Material.