摘要:
A molten bath-based direct smelting process comprises controlling the process conditions in a direct smelting vessel so that molten slag in a molten bath of metal and slag in the vessel has a viscosity in a range of 0.5-5 poise when the slag temperature is in the range of 1400-1550° C. in the molten bath in the vessel.
摘要:
The present invention relates to a slag discharge door device for an electric furnace, wherein slag is prevented from flowing out via a slag discharge port by making a discharge control door body move up and down to and from the upper surface of a supporting body where slag is discharged by flowing to the upper surface, and the discharge of slag is controlled, such that during steel-making work in the electric furnace, the outflow of slag is prevented and heat losses are reduced, the efficiency of arc heat due to the formation of foamed slag is increased, and valuable metals are recovered from the molten slag thereby increasing the percentage of molten steel recovered.
摘要:
The disclosure is directed to a process for producing separable iron and titanium oxides from an ore containing titanium oxide and ferric oxide, comprising: (a) forming agglomerates comprising carbon-based materials and the ore, the quantity of carbon of the agglomerates being sufficient for, at an elevated temperature, reducing ferric oxide to ferrous oxide and forming a ferrous oxide-rich molten slag, (b) introducing the agglomerates onto a carbon bed of a moving hearth furnace; (c) heating the agglomerates in the moving hearth furnace to a temperature sufficient for reducing and melting the agglomerates to produce a ferrous oxide-rich molten slag; (d) metallizing the ferrous oxide of the molten slag by reaction of the ferrous oxide and the carbon of the carbon bed at a furnace temperature sufficient for maintaining the slag in a molten state; and (e) solidifying the slag after metallization of the ferrous oxide to form a matrix of titanium oxide-rich slag having a plurality of metallic iron granules distributed there through; and (f) separating the metallic iron granules from the slag, the slag comprising greater than 85% titanium dioxide based on the entire weight of the matrix after separation of the metallic iron. The disclosure is also directed to a metallization product of a ferrous oxide-rich molten slag.
摘要:
A method for producing liquid ferroalloy by direct processing of manganese and chromium bearing iron compounds, by the steps: of mixing carbonaceous reductant, fluxing agent, and a binder with materials such as iron sands, metallic oxides, manganese-iron ore concentrates and/or chromium-iron ore concentrates and silica sands, to form a mixture; forming agglomerates from the mixture; feeding the agglomerates to a melting furnace with other materials; melting the feed materials at a temperature of from 1500 to 1760 C and forming a slag and hot metal; removing the slag; and tapping the hot metal as liquid ferroalloy.
摘要:
Apparatus and process for producing metal products, in which a metal-containing charge material is melted in a melting unit, and a working gas, in particular an at least partially reducing working gas, is additionally produced in the melting unit. The working gas produced is extracted and if appropriate after cleaning, is used as a carrier gas, at least in part for—preferably pneumatic—transport of an at least partially reduced metal-containing material in the form of fine particles.
摘要:
A dross compression apparatus and method includes one or more air nozzles for directing cooling air across the top of a compression head for cooling the compression head. The air may be vented through air vents in a wall of the apparatus after passing across the top of the compression head. Also a plurality of ribs may extend across the top of the compression head in the direction of the air vents in the wall of the apparatus for directing the air across the top of the compression head and out the air vents.
摘要:
The method of the present invention involves recycling or reprocessing small-sized metallic or non-metallic by-products by enclosing them in a binder prior to melting. The binder can be a steel drum or other suitable steel enclosure. Melting is then accomplished by a cupola but can be also effected by an electric furnace, such as an arc or coreless furnace.
摘要:
The present invention provides a method for efficiently manufacturing a titanium oxide-containing slag from a material including titanium oxide and iron oxide, wherein a reduction of titanium dioxide is suppressed and the electric power consumption is minimized. The method includes the steps of: heating a raw material mixture including titanium oxide, iron oxide, and a carbonaceous reductant, or the raw material mixture further including a calcium oxide source, in a reducing furnace; reducing the iron oxide in the mixture to form reduced iron; feeding the resultant mixture to a heating melting furnace; heating the resultant mixture in the heating melting furnace to melt the reduced iron and separate the reduced iron from a titanium oxide-containing slag; and discharging and recovering the titanium oxide-containing slag out of the furnace.
摘要:
The dross pot comprises a generally conical vessel with a plurality of internal upstanding ribs which divide the dross pot into a plurality of segments and also provide a plurality of draining holes for molten metal.
摘要:
A process is disclosed for working up combustion residues or slags from waste incineration plants or steel works slags in a converter by reacting the molten slag with a metal bath while injecting carbon and oxygen into the metal bath. The converter is subdivided into three adjacent openly communicating zones. An afterburning zone including at least one lance for afterburning directed onto the slag bath is arranged in the vicinity of the slag feed. The lance generates a circulating flow above the slag bath. Following the afterburning zone, a metal bath sump zone is formed for reacting the metal bath with the slag bath. Next, a settling zone is formed, from which the hot combustion gases and the slag melt are drawn off.