Class / Patent application number | Description | Number of patent applications / Date published |
075693000 | Lead(Pb) | 6 |
20160201160 | TREATMENT OF HIGH SULPHUR SOLIDS | 07-14-2016 |
075695000 | Reduction | 1 |
20100107821 | SWIRLING COLUMN NOZZLE, SWIRLING COLUMN SMELTING EQUIPMENT USING THE SAME, AND SWIRLING COLUMN SMELTING METHOD - A swirling column nozzle comprises a nozzle body with an air chamber defined therein; an outlet portion, a feed pipe penetrating through the air chamber and extending to the outlet portion, an oxygen supplying portion disposed on the nozzle body, the outlet portion is formed with a swirling guide part for moving a mixture of the oxygen gas and the concentrate downwardly in the form of a swirling column. Further, a swirling column smelting equipment and a method thereof are disclosed. The air flow moves downwardly in a substantially swirling column, so the chemical reaction path and reaction time are extended remarkably, allowing the reduction of the height of the reaction shaft. | 05-06-2010 |
075697000 | Treating molten Lead(Pb) | 4 |
20100132508 | Process for separating and refining impurities from lead bullion - The Razor Process™ is a unique pyrometallurgical lead refining process. Benefits from the Razor process™ include: lower energy costs; improved working environment; reduced recycling costs; increased refining productivity; reduced cycle time and labor requirements; and production of secondary recyclable products, therefore yielding unique and immediate benefits. | 06-03-2010 |
20100229686 | PROCESS FOR REFINING LEAD BULLION - A unique pyrometallurgical lead refining process includes adding a Lewis acid component and an Arrhenius base compound to a molten lead bullion. The Lewis acid component and Arrhenius base compound are added in stoichiometric amounts that preferentially remove lighter amphoteric elements from the molten lead bullion, and promote reactions with amphoteric p-block elements in the lead bullion to form over the lead a slag of Lewis bases, thereby forming a slag layer incorporating the metal salts of the amphoteric p-block elements. | 09-16-2010 |
20120227544 | PROCESS FOR REFINING LEAD BULLION - A unique pyrometallurgical lead refining process includes adding a Lewis acid component and an Arrhenius base compound to a molten lead bullion. The Lewis acid component and Arrhenius base compound are added in stoichiometric amounts that preferentially remove lighter amphoteric elements from the molten lead bullion, and promote reactions with amphoteric p-block elements in the lead bullion to form over the lead a slag of Lewis bases, thereby forming a slag layer incorporating the metal salts of the amphoteric p-block elements. | 09-13-2012 |
20140238198 | Apparatus and Methods For Purifying Lead - Disclosed is an exemplary method of purifying lead which includes the steps of placing lead and a fluoride salt blend in a container; forming a first fluid of molten lead at a first temperature; forming a second fluid of the molten fluoride salt blend at a second temperature higher than the first temperature; mixing the first fluid and the second fluid together; separating the two fluids; solidifying the molten fluoride salt blend at a temperature above a melting point of the lead; and removing the molten lead from the container. In certain exemplary methods the molten lead is removed from the container by decanting. In still other exemplary methods the molten salt blend is a Lewis base fluoride eutectic salt blend, and in yet other exemplary methods the molten salt blend contains sodium fluoride, lithium fluoride, and potassium fluoride. | 08-28-2014 |