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JP3176560B2 |
To eliminate the metal with a low melting point in the molten bath of cast iron which is molten in a crucible induction furnace. In a crucible induction furnace which melts the raw material of cast iron containing the steel sheet plated ...
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JP2001158924A |
To provide a new technique, in which zinc-containing iron base waste material and aluminum dross are simultaneously treated and the harmlessness of both waste materials and the recovery of useful metals are carried out at a low cost with...
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JP2001149891A |
To provide a method for melting a heavy metal-containing substance 4 by charging the heavy metal-containing substance 4 in a converter or rotary kiln useful as a melting furnace to melt the same by a burner 2 operated by gas containing o...
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JP2001107123A |
To improve the reducing rate of iron and the removing rate of zinc when zinc-containing dust is reduced. High zinc dust containing 5-30 wt.% zinc and low zinc dust containing ≤5 wt.% zinc, are separately granulated and mixed, or separa...
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JP3155985B2 |
PURPOSE: To provide a distillation column tray and a distillation column provided with the same capable of improving heat efficiency by modifying a shape of a tray used in the distillation column for distilling metals and extremely reduc...
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JP2001501255A |
The present invention relates to a process for obtaining metals from oxides using shuttle alloys, particularly titanium metal from titanium dioxide in the form of illmenite rutile. The process can be adapted to obtain elemental metal or ...
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JP2001011543A |
To provide a method of manufacturing coarse zinc/lead oxide sintered lumps, in which a sintered material of ≥30 wt.% sintered lump ratio is obtained even if raw materials to be sintered are sintered at a conventional sintering temperat...
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JP2000345248A |
To change steelmaking dust as an industrial waste material into resource recovery without charging new resource by mixing carbonization composition of a shredder dust into the steelmaking dust, applying the heat treatment to the mixture,...
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JP2000309831A |
To efficiently remove zinc component by restraining the elution of the iron component from steelmaking dust produced in a steelmaking furnace, such as a converter, molten iron pretreating furnace and containing a low concn. of zinc. This...
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JP3093067B2 |
PURPOSE:To efficiently remove and collect zinc by heating scrap of galvanized steel sheet in a vacuum treatment furnace, evaporating the galvanized layer, and introducing the evaporated zinc into a collecting chamber in the atmosphere of...
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JP2000239758A |
To provide a method for recovering zinc from zinc-containing powdery material by which the recovered material having high zinc concn. and little variation of the concn. in a day can be obtd. by using a vertical type smelting reduction fu...
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JP3080947B1 |
To provide a recovering method of zinc, by which pure zinc and/or zinc oxide can efficiently be recovered from a raw material containing zinc or a zinc compound, and a treating method of electric furnace dust, by which metals can efficie...
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JP2000510528A |
PCT No. PCT/GB96/02785 Sec. 371 Date Jul. 16, 1998 Sec. 102(e) Date Jul. 16, 1998 PCT Filed Nov. 12, 1996 PCT Pub. No. WO97/18338 PCT Pub. Date May 22, 1997Finely divided material, such as flue dust from a steel making furnace, is proces...
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JP2000212654A |
To provide a method for recovering heavy metal contents from a substance containing copper, lead, zinc and other heavy metal contents, and chlorine in which the heavy metal is directly separated and recovered from chlorine in an initial ...
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JP2000212656A |
To reduce heating energy required for recovering metal by heating the material to be treated contg. deposition metal removed by a mechanical means from steel deposited with metal under the reduced pressure, evaporating the deposition met...
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JP2000509104A |
A method of stabilizing a fluidized bed in a fluidized bed roasting process for metal sulphide concentrate comprises the step of controlling the particle size distribution of the particulate material in the bed so that a minimum amount o...
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JP2000192128A |
To provide an operating method of a furnace, in which the perfect separation can be performed in the case of separating and recovering from electric furnace dust. In the operating method of a solid reducing material filling layer type fu...
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JP2000192165A |
To provide a producing method of a crude zinc oxide sintered ore having sufficient strength even if the sintering temp. and time of the conventional method are kept intact. In the producing method of the crude zinc oxide sintered ore by ...
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JP2000192125A |
To improve and stabilize the concentration of zinc recovered from furnace top gas when the zinc and iron are separated and recovered from an electric furnace dust. In the case of recovering the zinc, by using two stages of tuyeres at the...
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JP3052706B2 |
PURPOSE: To efficiently reduce and evaporate the zinc in zinc-contg. dust and recover the zinc and iron in the dust at a high recovery rate. CONSTITUTION: The zinc-contg. dust is charged in the form of agglomerate 61 onto the molten iron...
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JP3050720B2 |
PURPOSE: To recover a good-quality steel sheet scrap for a melting raw material as the main product and metallic zinc as the by-product by preheating a galvanized steel sheet scrap and then heating the scrap to a specified temp. in a spe...
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JP2000128530A |
To provide an efficient continuous treating method of crude zinc oxide powder remarkably reduced in halogen element content in a process for recovering crude zinc oxide powder by using steel making flue cinder as a raw material and roast...
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JP2000119761A |
To efficiently recover zinc and lead contained in fly ash by including a process for recovering zinc using a zinc solubilizing agent, a pH adjusting agent and an insolubilizing agent and a process for recovering lead using a lead solubil...
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JP3033411B2 |
PURPOSE: To efficiently remove the Zn-plating in the solid condition at a low cost by heating the galvanized steel under the oxidizing atmosphere at the prescribed temperature to oxidize the Zn-plating without deteriorating the working e...
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JP3014614B2 |
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JP2000501779A |
PCT No. PCT/FR96/01265 Sec. 371 Date Apr. 6, 1998 Sec. 102(e) Date Apr. 6, 1998 PCT Filed Aug. 8, 1996 PCT Pub. No. WO97/06283 PCT Pub. Date Feb. 20, 1997Method for upgrading waste material comprising sheet metal with a zinc plating on a...
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JP2000026923A |
To perfectly burn carbon floated on a refining material by feeding steam and/or oxygen-enriched gas in almost parallel to the surface of the refining material into an oven chamber and making the total quantity of oxygen used in the oven ...
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JP2000017346A |
To provide a method for separating a zinc portion contained in dust in a high temp. discharged gas from various steel making furnaces such as a convertor or an electric furnace in a reduction reaction furnace while utilizing sensible hea...
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JP2000008127A |
To provide a method, by which coarse zinc and lead oxides sintered block can be produced in good productivity from granulated material obtd. by increasing the mixing ratio of a sulfide concentrate containing zinc and lead. In the method ...
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JPH11310834A |
To provide a method for recovering zinc oxide in high purity by separating the zinc oxide contained in dust generated at the time of melting and refining iron and steel from the other components in an exhaust gas. A reducing material is ...
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JPH11310832A |
To recover iron separated from zinc and lead with high concentration by adding fine particulate coke into a mixture of an iron and steel waste oxide and sludge to form a briquette and firing the briquette in a rotary furnace hearth. The ...
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JP2972524B2 |
PURPOSE:To successively precipitate the lead and zinc in an incinerated ash as the sulfides and to fractionally recover the lead and zinc efficiently by supplying sodium sulfide to a soln. containing eluted heavy metals from the ash and ...
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JPH11293351A |
To provide a preheating and melting method of scrap, with which dust having high zinc concn. developed at the time of preheating and melting the scrap containing the zinc can be separated and recovered. In an apparatus for preheating and...
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JPH11292620A |
To provide a production process for hot briquette that relates to the production process for zinc oxide briquettes as a feedstock for zinc blast furnace smelting, particularly relates to production process for zinc oxide briquettes accor...
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JP2946136B2 |
PURPOSE:To provide the dezincification method for galvanized steel sheet scrap which evaporates and removes zinc by heating a high-temp. reducing gas prior to melting of the galvanized steel sheet scrap and provides cast iron sources. CO...
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JP2944466B2 |
PURPOSE: To classify and recover heavy metals intended to be separated, classified and recovered as sulfides with high purity and high recovery rate always without increasing sulfur component content in treated waste water even when kind...
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JPH11222634A |
To improve the workability of zinc smelting and the yield of a product by continuously feeding granular ammonium chloride near to the drop port run-down molten zinc and converting the zinc oxide of dross to zinc chloride, thereby erasing...
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JPH11218387A |
To prevent mixing of bulk matter into a floor laid hopper upon treating bulk matter in a sintered material in refining zinc and improve working efficiency by feeding the collected bulk matter into a main mineral hopper automatically with...
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JPH11193424A |
To provide a method and a device for separating and recovering a metal source containing a plurality of kinds of metal oxides where the purity of the recovered metal of high vapor pressure is high. The metals of low vapor pressure separa...
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JPH11189832A |
To provide a treating method of zinc-containing powdery material, with which the variation of zinc concn. in recovered material is restrained and also, this zinc concn. can be stabilized at a high level, at the time of recovering the zin...
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JPH11181535A |
To provide a zink recovering method from zinc-containing powder, by which the recovered material having high zinc concn. and little daily variation can be obtd. by using a vertical type smelting reduction furnace. Packed layer 5 of carbo...
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JP2894477B2 |
PURPOSE:To use the molten fly ash contg. zinc, lead, mercury and chlorine as the secondary material for nonferrous metal refining without discarding the fly ash to reclamation. CONSTITUTION:The molten fly ash is leached with water in the...
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JPH11504985A |
A process for recovering iron from an iron oxide bearing mass. The process includes forming a bed of lump coke in a vertical shaft furnace, feeding the iron oxide bearing mass and scrap metal onto the bed of lump coke and combusting the ...
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JP2879691B2 |
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JP2879688B2 |
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JP2879689B2 |
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JP2879690B2 |
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JPH11503202A |
A method and apparatus for treatment of the fly ash are described wherein heavy metals are separated and wherein there is formed a leaching resistant slag; the fly ash is introduced into a reactor into an oxidizing gas stream which is he...
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JPH11502566A |
PCT No. PCT/SE96/00264 Sec. 371 Date Sep. 3, 1997 Sec. 102(e) Date Sep. 3, 1997 PCT Filed Mar. 1, 1996 PCT Pub. No. WO96/27556 PCT Pub. Date Sep. 12, 1996A process for the purification of solutions containing metals comprising neutraliza...
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JPH1160228A |
To provide a method for producing a highly pure polycrystal silicon, stable in quality for a solar battery use and matching to price cutting. This method for producing a highly pure silicon combines a zinc-smelting process comprising a s...
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