The invention relates to a method for the granulation of a metallurgical slag, wherein liquid slag (1) is atomized by blowing air (2) onto it and the slag particles (3) granulated in this way are collected. In order to ensure a high quality of the granulate and operate in the most energy-efficient manner possible, the invention provides that the atomization is done by blowing heated air jet (2) free from the addition of water onto the liquid slag (1) and the slag is supplied to a working chamber (4), wherein the granulated slag particles (3) are collected in the floor region of the working chamber (4), wherein the air (5) escaping from the working chamber (4) is either supplied to a heat exchanger (6), which preheats the air jet blown onto the liquid slag (1), or directly recirculated in order to atomize the liquid slag (1).

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.

The present invention provides a method of simultaneously recycling plastics and detoxifying chromite ore processing residue with residual heat from a steel slag. By heating and gasifying plastics with steel slag, followed by catalytically split-decomposing the plastics with catalysts such as chromite ore processing residue, the plastics are thoroughly converted into a energy gas under water vapor gasification. The surface coking of Chromite Ore Processing Residue is avoided. Meanwhile, the energy gas reduces Cr.sup.6+ in Chromite Ore Processing Residue into Cr.sup.3+, and the energy gas is cooled, and CO.sub.2 and Cl in the energy gas are adsorbed by alkaline substances in Chromite Ore Processing Residue. With this method, chromite ore processing residue is detoxified, and steel slag is cooled, furthermore, energy is saved and a energy gas is obtained.

A control system and method for dry centrifugal granulation of liquid slag are provided. The control system includes a granulator cold-air control unit and a feeding unit. The granulator cold-air control unit includes a granulator, a rotating shaft, a motor, and a cold-air supply unit. The granulator is fixed to the motor; the cold-air supply unit includes a shaft cooling air channel and an annular cooling air channel; the shaft cooling air channel consists of an inner duct sleeve and a shaft sleeve; the annular cooling air channel consists of the inner duct sleeve and an outer duct sleeve arranged at periphery of the inner duct sleeve, which have different external diameters; the feeding unit includes a slag dropping pipe arranged above the granulator; a sliding gate is arranged at a lower section of the slag dropping pipe, and an accident diversion spout is equipped.

A method of continuous manufacturing of solidified steelmaking slag including the steps of solidifying molten steelmaking slag comprising at least 2% in weight of free lime so as to produce solidified slag particles having a diameter below 1 mm, the molten steelmaking slag being put in contact with at least a first carbonation gas during such solidification, cooling the solidified slag particles down to a temperature below or equal to 300 C., in a closed chamber, the solidified slag particles being put in contact with at least one second carbonation gas during such cooling. The invention is also related to an associated device.

A method for controlling a particle size of dry centrifugal granulated slag from liquid slag, which is based on a dry centrifugal granulation system for liquid slag, wherein the dry centrifugal granulation system for the liquid slag includes: a temperature control unit, a flow control unit, and a granulator control unit; wherein the temperature control unit is configured to control a high-temperature slag in the liquid slag buffer device to maintain a first set temperature range, and control a temperature of an outflow slag of the buffer device to maintain a second set temperature range; a flow control unit configured to control a flow rate of the high-temperature slag flowing out of the buffer device in a set range to ensure smoothness of the flow; a granulator control unit configured to ensure a smooth operation of the granulator during high-speed rotation.

A system and method for recovering a high yield of low carbon ferrochrome from chromite and low carbon ferrochrome produced therefrom. A stoichiometric mixture of feed materials including scrap aluminum granules, lime, silica sand, and chromite ore are provided into a plasma arc furnace. The scrap aluminum granules are produced from used aluminum beverage containers. The feed materials are heated, whereupon the aluminum in the aluminum granules produces an exothermic reaction reducing the chromium oxide and iron oxide in the chromite to produce molten low carbon ferrochrome with molten slag floating thereon. The molten low carbon ferrochrome is extracted, solidified and granulated into granules of low carbon ferrochrome. The molten slag is extracted, solidified and granulated into granules of slag.

A method and system for recovering a high yield of low carbon ferrochrome from chromite and low carbon ferrochrome produced by the method. A stoichiometric mixture of feed materials including scrap aluminum granules, lime, silica sand, and chromite ore are provided into a plasma arc furnace. The scrap aluminum granules are produced from used aluminum beverage containers. The feed materials are heated, whereupon the aluminum in the aluminum granules produces an exothermic reaction reducing the chromium oxide and iron oxide in the chromite to produce molten low carbon ferrochrome with molten slag floating thereon. The molten low carbon ferrochrome is extracted, solidified and granulated into granules of low carbon ferrochrome. The molten slag is extracted, solidified and granulated into granules of slag.

A method for manufacturing thin-specification high-Ti wear-resistant steel NM450 comprises the steps of preparing melted iron in a blast-furnace, preprocessing the melted iron, smelting the melted iron in a converter, refining the melted steel in a LF furnace, refining the melted steel in a RH furnace, conventional slab continuous casting, heating the slab in a heating furnace, dephosphorizing the slab by high-pressure water, heating the slab in a hot continuous rolling mill, performing ultra fast cooling, reeling, flattening, heating, quenching, tempering and finishing.

Systems and methods for producing a blasting medium from a slag and using the blasting medium. A slag produced during steel making processes is poured at a high temperature. The poured slag is then further processed to produce the blast medium. The blasting medium is used to clean a surface via blasting.