Provided are a method and an arrangement for adjusting characteristics of a furnace process in a furnace space limited by a furnace shell of a metallurgical furnace. The arrangement comprises an injection unit having a frame mounted by means of a mounting means on the metallurgical furnace outside the furnace space of the furnace shell. Also provided is an injection unit for use in the method and in the arrangement.

Provided are a method and an arrangement for adjusting characteristics of a furnace process in a furnace space limited by a furnace shell of a metallurgical furnace. The arrangement comprises an injection unit having a frame mounted by means of a mounting means on the metallurgical furnace outside the furnace space of the furnace shell. Also provided is an injection unit for use in the method and in the arrangement.

A metal scrap submergence device comprising an open top chamber including walls of a heat resistant material, an inlet positioned in the chamber, an outlet positioned in the base of the chamber, and a ramp adjacent the side wall of the chamber. The device further including a removable vane, an inwardly or outwardly sloped ramp surface, and/or diverter.

A metal scrap submergence device comprising an open top chamber including walls of a heat resistant material, an inlet positioned in the chamber, an outlet positioned in the base of the chamber, and a ramp adjacent the side wall of the chamber. The device further including a removable vane, an inwardly or outwardly sloped ramp surface, and/or diverter.

Equipment for the measurement and control of load material and scrap metal feeding into an electrical arc furnace includes an automatic control device for feeding control of load material or scrap according to the energy supplied to the bath, and a measuring device for the added load material, in correlation with the automatic control device, and a weighing device for the furnace shell, its contents and any other components it may support.

The invention relates to the field of metallurgy and can be used in the making of steel in a single installation that encompasses all of the stages of the making and refining of steel as well as the casting of steel from the installation. The present installation comprises: a casting ladle with two slide gates; a water-cooled roof with electrodes, which is docked to the ladle and is connected to a gas cleaner; a slag runner; dosing bins for adding fluxes and deoxidizers; charging pipes for adding charge materials; a hot metal pouring-in funnel; a jet for injecting natural gas and air or oxygen, which is comprised of coaxial pipes and is mounted in pouring nozzle of the slide gate which is intended for melting process; and, connected to an injection apparatus, a tubule for injecting slag-forming reagents together with an inert gas or nitrogen. The installation is provided with a conveyor, which has a fuel burner and is connected to the roof. In the installation, cavities formed during melting are filled by the adding of grinded scrap and/or pre-reduced pellets, which are heated by furnace exhaust gases and/or additional natural gas flames during their motion on the conveyor covered by the roof and water-cooled. The invention makes it possible to avoid heat loss, reduce fuel consumption and also increase the stability of the process of melting and treating a metal in a single modernized installation under automated conditions without deactivating the installation and removing the furnace roof.

The invention relates to the field of metallurgy and can be used in the making of steel in a single installation that encompasses all of the stages of the making and refining of steel as well as the casting of steel from the installation. The present installation comprises: a casting ladle with two slide gates; a water-cooled roof with electrodes, which is docked to the ladle and is connected to a gas cleaner; a slag runner; dosing bins for adding fluxes and deoxidizers; charging pipes for adding charge materials; a hot metal pouring-in funnel; a jet for injecting natural gas and air or oxygen, which is comprised of coaxial pipes and is mounted in pouring nozzle of the slide gate which is intended for melting process; and, connected to an injection apparatus, a tubule for injecting slag-forming reagents together with an inert gas or nitrogen. The installation is provided with a conveyor, which has a fuel burner and is connected to the roof. In the installation, cavities formed during melting are filled by the adding of grinded scrap and/or pre-reduced pellets, which are heated by furnace exhaust gases and/or additional natural gas flames during their motion on the conveyor covered by the roof and water-cooled. The invention makes it possible to avoid heat loss, reduce fuel consumption and also increase the stability of the process of melting and treating a metal in a single modernized installation under automated conditions without deactivating the installation and removing the furnace roof.

A scrap steel preheating type electric arc furnace and a method for improving a heating cold region of a side wall charging electric arc furnace are provided. The scrap steel preheating type electric arc furnace includes an electric arc furnace body and an inclined scrap steel preheating chamber. An included angle between the scrap steel preheating chamber and a horizontal plane is 30? to 65?. The scrap steel preheating chamber is connected with the electric arc furnace body. A dust removal pipe chamber is at an upper end. A material blocking tooth rake is on the scrap steel preheating chamber. A driving mechanism is below the material blocking tooth rake. Flue gas enters the scrap steel preheating chamber, penetrates through the material blocking tooth rake and the scrap steel and is sucked out by the dust removal pipe chamber. The scrap steel is preheated; then, the material blocking tooth rake is opened; and the preheated scrap steel slides to a center of the electric arc furnace body along a slot bottom of the inclined scrap steel preheating chamber. A falling angle of the scrap steel is changed through a method of matching the scrap steel preheating chamber with a large inclined angle and the material blocking tooth rake, thereby overcoming a problem of lateral stacking of the side wall charging electric arc furnace, reducing impact force of the scrap steel to the device and greatly enhancing reliability of the device.

A scrap steel preheating type electric arc furnace and a method for improving a heating cold region of a side wall charging electric arc furnace are provided. The scrap steel preheating type electric arc furnace includes an electric arc furnace body and an inclined scrap steel preheating chamber. An included angle between the scrap steel preheating chamber and a horizontal plane is 30? to 65?. The scrap steel preheating chamber is connected with the electric arc furnace body. A dust removal pipe chamber is at an upper end. A material blocking tooth rake is on the scrap steel preheating chamber. A driving mechanism is below the material blocking tooth rake. Flue gas enters the scrap steel preheating chamber, penetrates through the material blocking tooth rake and the scrap steel and is sucked out by the dust removal pipe chamber. The scrap steel is preheated; then, the material blocking tooth rake is opened; and the preheated scrap steel slides to a center of the electric arc furnace body along a slot bottom of the inclined scrap steel preheating chamber. A falling angle of the scrap steel is changed through a method of matching the scrap steel preheating chamber with a large inclined angle and the material blocking tooth rake, thereby overcoming a problem of lateral stacking of the side wall charging electric arc furnace, reducing impact force of the scrap steel to the device and greatly enhancing reliability of the device.

An example embodiment of the present invention provides a system for preheating ferromagnetic scrap. The system can include a preheating unit that is configured to hold ferromagnetic scrap and to receive hot gases. The preheating unit may include a removable cover that can include an electrical magnet system. The electrical magnet system can comprise an electrical magnet, a lifting device configured to lower and raise the electrical magnet, a power system configured to provide electrical power to the electrical magnet, and an electrical control system configured to operate the magnet. A hot gases cleaning system may be fluidly connected to the preheating unit.