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Most special methods can be applied to molybdenum. Holes 1/8 in. diameter by 12 in. long can be electrical discharge machined using brass electrodes and machining from both ends. Holes, 7 to 1000 microns in diameter, have been made in molybdenum by micromachining with virtual electrode in a 10% potassium hydroxide electrolyte.
Molybdenum has a tendency to chip, so depth during threading should not be more than 50% 60%. Molybdenum can be rolled threaded, but this method is slow, and the preferred, faster methods consist of turning or chasing. Heat the moly and the die to 162°C for best results. Molybdenum can be heated to 162°C in
Molybdenum was discovered by Carl Wilhelm Scheele in 1778, and was isolated and named by Peter Jacob Hjelm in 1781. The most important ore source of molybdenum is the mineral molybdenite; a minor amount is recovered from the mineral wulfenite. Molybdenum commonly is recovered as a by product or co product from copper mining.
Molybdenum beneficiation and smelting technology. Commonly used methods for separation of copper and molybdenum and selection of molybdenum concentrates are sodium sulfide method and sodium cyanide method. The frequency of molybdenum beneficiation mainly depends on the total enrichment ratio of molybdenum. Generally, if the total enrichment ratio is high, the number of selections is usually more; if the total enrichment ratio is low, the number of selections is usually less.
Copper molybdenum separation and molybdenum concentrate mainly use sodium sulfide and sodium cyanide process . After processing the molybdenum ore will be 0.1% , enrichment ratio 430～520，concentrate 12 times . Molybdenum ore processing and equipment
June 10, 2020
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