C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 13/02 (2006.01)
Patent
CA 2129441
A method of processing low grade lead-bearing materials where mostly simple and complex sulphates and oxides of metals are present, including higher iron oxides, such as for example, lead residues, dusts of matte converting and other similar materials. The starting material is mixed with fluxes, and powder sulphide and/or carboniferous material is inserted with a moisture content of resulting charge from about 2 to about 16%. The charge is dried, mixed with oxidized recycle dust, crushed carboniferous material and subjected to flash smelting in oxygen atmosphere. During smelting, the powder material reduces sulphate sulphur and higher iron oxides and, therefore a low melting oxide melt is produced and the crushed carboniferous material formes a heated bed under the torch of flame. Lead sulphate in this bed is reduced out of the melt and zinc stays in slag. Smelting off -gas is cleaned of oxidised dust which is returned to smelting. The following material is inserted to the charge as a powder material: either sulphide material (e.g. lead ore, low grade concentrate), which is added to the charge to obtain a mass ratio of the sum of sulphide, elemental and pyrite sulphur to a total sulphur content within the range from about 0.08 to about 0.87 or carboniferous material rated at about 4 to about 12 kg of uncombined carbon per 100 kg of ferric iron and from about 20 to about 140 kg of uncombined carbon per 100 kg of sulphate sulphur, or both materials are inserted at the same time in amounts indicated above
Grinin Yuri Aleksandrovich
Kasenov Nukezhan Satybaldievich
Klimov Vyacheslav Mikhailovich
Kljuev Gennady Fedorovich
Kulenov Akat Salemkhaovich
Blake Cassels & Graydon Llp
Otkrytoe Aktsionernoe Obschestvo "kazzinc"
Tecnicom-Ge S.r.i.
Vostochny Nauchno-Issledovatelsky Gorno-Metallurgichesky Insitut
LandOfFree
Method of processing lead-bearing materials does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of processing lead-bearing materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of processing lead-bearing materials will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1777577