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JPH09279265A |
To provide an equipment, in which zinc content in recovered dust is concentrated to about ≥50% and iron in zinc-containing dust can be recovered as molten iron by reducing vaporizing and recovering zinc oxide in the zinc- containing du...
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JPH09268330A |
To manufacture briquettes of crude zinc oxide sinter stably having the strength to obviate degradation again by adjusting the crude zinc oxide sinter to a specific grain size distribution and subjecting the sinter to press molding while ...
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JPH09241773A |
To recover zinc at a low cost by roasting the dust in an oxidizing atmosphere and extracting zinc with a sulfuric acid aq. solution. The dust is roasted at 700-950°C at first. As a result, iron and zinc in the dust are converted into a ...
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JPH09241718A |
To provide a method for efficiently recovering dust having a high canon. from zinc oxide-contg. dust, such as iron making dust. The oxide-contg. dust is agglomerated and is charged into a melting furnace in which molten iron is housed. I...
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JPH09227961A |
To provide a method for treating zinc oxide-contg. waste capable of recovering metallic zinc having high purity from the waste contg. zinc oxide and executing the on-site treatment. Mixed treating materials are obtd. by mixing the waste ...
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JP2625140B2 |
Citric acid partial esters corresponding to the following general formula (I) in which R1, R2 and R3 represent hydrogen or a straight-chain or branched C4-C20 alkyl radical or a metal atom, with the proviso that at least one but at most ...
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JPH09506349A |
Compounds of formula (I), wherein R<1> is an optionally substituted 2-alkylphenoxy group, each of R<2>, R<3> and R<4> is a group selected from optionally substituted 2-alkylphenoxy, optionally substituted phenyl, optionally substituted a...
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JP2622413B2 |
PURPOSE:To separate and recover a high purity Zn compd. at a high yield by bringing the dust which is collected from an electric furnace, etc., and contains Zn, Fe and other metals into contact with an acid in the presence of an oxidizin...
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JP2619254B2 |
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JPH09125169A |
To efficiently and cost effectively produce high-purity zinc sintered ore by roasting crude zinc oxide at a specific temp. in a continuous type rotary furnace of a gas atmosphere of a specific steam concn. and specific quantitative ratio...
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JPH0987755A |
To widen the range of utilizing iron scrap to steel products where the steel scrap is heretofore unusable as the raw material by efficiently and cost-effectively removing the impurities, such as copper, tin or antimony accompanying the s...
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JPH0953129A |
To reduce iron making dust contg. zinc at a high temp. by using coal and oxygen to separate this dust from iron, further, to prevent oxidation at the time of cooling, to recover metallic zinc, to recover the formed gases and to use these...
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JPH0925504A |
To execute dephosphorization of molten iron by using the zinc-contg. dust generated in an electric furnace and simultaneously to thicken and recover the zinc-component in the zinc-contg. dust. Iron oxide as an oxidizing agent together wi...
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JP2572609B2 |
In conjunction with an electrolytic production of zinc, the residues are processed so that the residue is leached with cell acid at a temperature from 50 DEG to 100 DEG C. in such a manner that a concentration of free acid from 10 to 100...
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JPH08512092A |
A process for recovering zinc and iron from zinc- and iron-containing sulphidic material, which also contains lead and silver, in which the sulphidic material is leached under oxidizing conditions in a two stage countercurrent pressure l...
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JPH08311570A |
To economically and environmentally safely reprocess zinc- and iron oxide-containing residual material. A granular body is granulated from zinc- and iron oxide- containing residual material in the presence of water, this granular body an...
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JPH08295956A |
PURPOSE: To provide a method, by which dust and reducing slag poor in utilizing value in both of steelmaking waste materials are changed into available materials in the steelmaking process and further, zinc oxide containing many quantity...
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JPH08295957A |
PURPOSE: To easily produce high purity zinc by adding an element with the ratio of the vapor pressure to that of zinc specified at the zinc distillation temp. to zinc and distilling the mixture. CONSTITUTION: In the refining of metallic ...
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JPH08260066A |
PURPOSE: To recover high-purity Zn at a good yield from electric furnace dust contg. Zn, etc., by blowing the dust, etc., into a vertical furnace packed with a solid carbon based reducing agent and forming the Zn into metal Zn vapor, the...
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JP2528388B2 |
PURPOSE: To provide a cleaning method and an apparatus which remove a quantity of liquid and solid stuck on the surface of a solid efficiently at a low running cost without oxidizing the material to be treated and can recover the liquid ...
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JPH08209211A |
PURPOSE: To recover the zinc included in the dust discharged from a furnace top at a high concn. by utilizing scrap of zinc plating, etc., or blowing zinc- contg. dust from tuyeres at the time of producing molten iron by melting the scra...
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JPH08188837A |
PURPOSE: To improve the condenser efficiency of an equipment by allowing a reducing furnace flue gas contg. zinc vapor to contact with the splashed molten lead and placing an impingement plate(s) in a gas space where the molten lead drop...
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JPH08505902A |
A continuous hydrometallurgical process for conversion of ore derived copper and zinc sulfides into recoverable water soluble sulfates is provided. The process comprises: i) contacting the ore derived copper and zinc sulfides with sulfur...
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JPH08143347A |
PURPOSE: To provide a device for recovering dross which is hardly broken down as the dross falls at one time in the form of nearly one lump by forming such dross into lumps of a suitable size. CONSTITUTION: This dross dispersing device h...
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JPH08134557A |
PURPOSE: To provide an operational method of reusing dust as iron source by recovering dust through separation while simultaneously achieving dezinc ratio and metallic iron ratio at ≥90% in a vacuum reaction furnace without applying a ...
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JPH0892664A |
PURPOSE: To provide a method and device for refining zinc capable of selectively and inexpensively removing aluminum from a zinc alloy. CONSTITUTION: Zinc dross is mixed with the zinc alloy in a molten state contg. aluminum and an interm...
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JPH0885831A |
PURPOSE: To efficiently remove the Sn type plating layer, applied to the surface of a Zn-containing alloy, by an extremely simplified treatment and to recover and reclaim the Zn-containing master alloy in the state of almost original com...
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JPH0885895A |
PURPOSE: To repeatedly use a refined zinc electrolyte freed from such impurities as Mg as a starting electrolyte without loss of zinc by extracting the zinc in the tail zinc electrolyte with an acidic extractant and stripping the zinc wi...
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JPH0826418B2 |
PURPOSE:To efficiently recover zinc oxide in dust by blowing the dust collected from a waste gas and a carbon material into the slag remaining in the electric arc furnace, collecting the dust from the waste gas generated therefrom and re...
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JPH0835020A |
PURPOSE: To recover zinc from a waste material such as a dust recovering from a waste gas of a metallurgy process as smelting. CONSTITUTION: A particulate zinc-containing material is agglomerated together with a carbonaceous reduction ma...
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JPH086153B2 |
In a process for recovering zinc from zinc-containing sulphidic material which comprises leaching the sulphidic material under pressurized oxidizing conditions at a temperature in the range of from 130 to 170 DEG C with aqueous sulphuric...
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JPH07331353A |
PURPOSE: To change dust and reduced slag, both of which are steelmaking waste materials and have low utilization value, to materials having high utilization value and also to separate and recovery zinc oxide incorporated in large quantit...
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JPH07331346A |
PURPOSE: To change dust and reduced slag having poor utility value in a steelmaking waste material into the material having rich utility value in the steelmaking process and if necessary, further, to separate and recover zinc oxide conta...
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JPH07116530B2 |
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JPH07316678A |
PURPOSE: To prevent the temp. drop of molten brass, to eliminate the reaction between a covering flux and the alloy component and the entrainment of the flux by the molten brass and to obtain the ingot having a low content of nonmetallic...
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JPH07316679A |
PURPOSE: To recover zinc in a soln. and to crystallize off fluorine by treating the raw material contg. zinc and fluorine by the fully wet process. CONSTITUTION: The raw material contg. zinc and fluorine is leached with sulfuric acid, an...
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JPH07300631A |
PURPOSE: To inexpensively recover zinc oxide powder with high purity by charging zinc-contg. iron materials into an oxygen burner type rotary melting furnace and introducing waste gases to a physical powder capturing means in the limited...
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JPH07103428B2 |
A process for recovering valuable metals from an iron dust using a shaft furnace is disclosed. The iron dust is agglomerated and supplied into a the shaft furnace together with a lump coke and a flux. Valuable metal oxides contained in t...
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JPH07292451A |
PURPOSE: To quickly and surely separate a zinc stuck to dross and to recover the zinc at high recovery ratio by extracting the dross produced in a hot dip galvanizing bath and heating and vaporizing the dross at the temp. above the b.p. ...
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JPH07286220A |
PURPOSE: To excellently remove a deposit by uniformly heating a scrap. CONSTITUTION: The substance depositing on the surface of a scrap is vaporized and removed at high temps. under reduced pressure. In this case, the scraps are introduc...
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JPH0784623B2 |
Temperature control in a pressurised oxidation leach for the recovery of non-ferrous metals from a sulphidic material is exercised by carrying out the leach in a multi-compartment autoclave (12), the first compartment (14) of which conta...
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JPH07238328A |
PURPOSE: To provide a lead splash condenser and a cleaning method using the lead splash, by which stuck material in the condenser can be removed without stopping the operation. CONSTITUTION: This condenser is constituted with a tube body...
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JPH07239192A |
PURPOSE: To provide a method and a smelting furnace wherein when slug in a molten state is fed into a furnace, the slug is formed into liquid droplets in a simple and easy manner without using a method of atomizing high pressure and the ...
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JPH07224331A |
PURPOSE: To lower the consumption units of carbonaceous materials and limestone by adding and mixing reduced iron pellet powder of iron and steel dust residues after recovery of Zn and Pb to and with iron and steel dust, pelletizing the ...
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JPH0776391B2 |
A process for recovery of zinc values from aqueous ammoniacal solutions employing certain alkylsalicylaldoximes or acetophenoximes as the extractant. The method also provides a means for separation of the zinc and copper values present i...
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JPH07216464A |
PURPOSE: To execute treatment safe in terms of environmental conservation without being affected by the zinc and lead content in raw materials by specifying operation conditions, such as specification of an oxygen quantity in a furnace a...
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JPH07207353A |
PURPOSE: To assist the smooth discharge of condenser dross to a sump. CONSTITUTION: In the operation method of a lead splash condenser to recover zinc vapor as molten zinc from the discharge gas of a reduction furnace containing zinc vap...
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JPH07197136A |
PURPOSE: To provide a plated material treating device capable of rapidly heating plated materials, removing plating metal with high efficiency from these plated materials, suppressing generation of harmful materials such as zinc oxide, r...
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JPH07188790A |
PURPOSE: To recover plating metals and iron scrap having good purity with high efficiency by rotating a cylindrical barrel arranged obliquely in a reduced pressure vessel body and charging plated materials together with heated and fluidi...
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JPH07188792A |
PURPOSE: To prove a plated material treating device which is capable of rapidly heating plated materials and is efficient. CONSTITUTION: This treating device is provided with a vacuum heating furnace 2 which is equipped with radiation tu...
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