The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 1989
Filed:
Sep. 16, 1988
Bengt O Gustafsson, Falun, SE;
Nils B Johansson, Hofors, SE;
SKF Plasma Technologies AB, Hofors, SE;
Abstract
To separate zinc out of a hot gas containing zinc vapour, a flow of lead is circulated in counterflow to the gas in a condenser. Heat from the lead flow from the condenser is transmitted to a chamber from which lead is transferred to the condenser. The lead flow from the condenser is cooled in known manner to a temperature at which its zinc saturation solubility is lower than its zinc content, thus causing precipitatioin of the zinc. The precipitated zinc is then separated off. The cooled flow of lead, poor in zinc, is transferred to the chamber for heating by the heat transmitted thereto so that the lead flow heated in this way and supplied to the condenser acquires a zinc saturation solubility higher than its zinc content. An apparatus for putting the method into effect comprises a lead-circulation circuit including a condenser, a cooling channel and means for separating zinc out of the lead, and has the lead-circulation circuit upstream of the condenser provided with a lead chamber with means being arranged to transmit heat from the lead flow leaving the condenser to the lead, poor in zinc, flowing through the chamber.