Method for recovering and purifying platinum from platinum-tungsten alloy
A platinum-tungsten alloy and physical method technology, applied in the field of platinum-tungsten alloy recovery and purification of platinum, can solve the problems of high energy consumption, low platinum recovery rate, complex recovery conditions, etc., to increase the contact area, improve recovery efficiency and recovery rate, The effect of accelerating the dissolution efficiency
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Embodiment 1
[0032] A method for recovering and purifying platinum from a platinum-tungsten alloy, comprising the steps of:
[0033] (1). Take 100g of Pt-W8, and use physical methods to crush it into blocks with a diameter of less than 0.5mm or flakes with a thickness of less than 0.5mm; the mass ratio of aqua regia and the crushed platinum-tungsten alloy is 4:1 Mix, heat for 1 hour at a temperature of 80°C, and filter to obtain a primary leachate and a primary leach residue;
[0034] (2).Physical drying and ball milling are carried out on the primary leaching slag. The physical drying temperature is 110°C, the drying environment is atmospheric environment, and the drying time is 1h. The drying slag is ball milled and crushed for 20 minutes to obtain the ball milled powder. the leaching residue;
[0035] (3). Mix aqua regia with the leaching slag after drying and ball milling at a mass ratio of 4:1, heat for 1 hour at a temperature of 100° C., and filter to obtain a secondary leaching sol...
Embodiment 2
[0038] A method for recovering and purifying platinum from a platinum-tungsten alloy, comprising the steps of:
[0039] (1). Take 150g of Pt-W40, and use physical methods to crush it into blocks with a diameter of less than 0.5mm or flakes with a thickness of less than 0.5mm; the mass ratio of aqua regia and the crushed platinum-tungsten alloy is 4:1 Mix, heat for 2 hours at a temperature of 100°C, and filter to obtain the primary leachate and primary leach residue;
[0040] (2).Physical drying and ball milling are carried out on the primary leaching slag. The physical drying temperature is 120°C, the drying environment is an atmospheric environment, and the drying time is 1h. The drying slag is ball milled and crushed for 30 minutes to obtain a dry ball mill. After leaching residue;
[0041] (3). Mix aqua regia with the leaching slag after drying and ball milling at a mass ratio of 4:1, heat for 2 hours at a temperature of 100° C., and filter to obtain the secondary leaching...
Embodiment 3
[0044] A method for recovering and purifying platinum from a platinum-tungsten alloy, comprising the steps of:
[0045] (1). Take 100g of Pt-W60, and use physical methods to crush it into blocks with a diameter of less than 0.5mm or flakes with a thickness of less than 0.5mm; the mass ratio of aqua regia and the crushed platinum-tungsten alloy is 4:1 Mix, heat for 2 hours at a temperature of 100°C, and filter to obtain the primary leachate and primary leach residue;
[0046] (2).Physical drying and ball milling are carried out on the primary leaching slag. The physical drying temperature is 110°C, the drying environment is the atmospheric environment, and the drying time is 1h. The drying slag is ball milled and crushed for 30 minutes to obtain a dry ball mill. After leaching residue;
[0047] (3). Mix aqua regia with the leaching slag after drying and ball milling at a mass ratio of 4:1, heat for 2 hours at a temperature of 100° C., and filter to obtain the secondary leachin...
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