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How to Improve the Recovery Rate of Molybdenum?
Molybdenum is a rare metal, which is widely used in modern industry. Adding molybdenum to steel and iron can improve the strength, toughness and corrosion resistance, making it one of the best alloy additive elements; Adding 15%~30% molybdenum to nickel base alloy can greatly improve the corrosion resistance; Molybdenum-rhenium alloy seamless tubes containing 50% molybdenum and 50% rhenium have good high-temperature performance, which can be used in the situation near the melting point; Molybdenum wire is widely used in electronic industry (such as silicon chip support, new light source electrode lead wire); Molybdenum compounds can be used as catalysts and reagents, and pigments can also be prepared.
Molybdenum ore accounts for 97.5% of the total cost of ferromolybdenum production, so the maximum increase of molybdenum recovery rate is of great importance to reduce costs and improve economic benefits. The links that may cause molybdenum loss must be strictly controlled.
* The vapor pressure of molybdenum trioxide is low and easy to sublimate, so reducing the sublimation amount of MoO3(s) and recovering molybdenum-containing dust must be paid attention to.
* In the roasting of molybdenum concentrate, the roasting temperature should be accurately controlled to minimize the sublimation of MoO3(s), and the recovered molybdenum dust should be re-roasting with an efficient purification system.
* In smelting, sealed furnace body can not only reduce the heat loss and the amount of reducing agent aluminum, but also reduce the amount of molybdenum loss in slag, and is conducive to the purification and dust removal of flue gas. The molybdenum-containing dust collected by the dust collector can be returned to smelting after lumping. If the dust contains other metal elements, comprehensive utilization of the dust should be considered.
* Ferromolybdenum particles included in ferromolybdenum slag must be recovered, which can be recovered by magnetic separation method.
* Finishing chips and nodular iron at the bottom of the furnace are the largest amounts of molybdenum-containing return material, so it should be combined with mature molybdenum ore smelting.
Advanced Refractory Metals (ARM) supplies high-quality molybdenum products such as molybdenum tube, molybdenum sheet, molybdenum strip, etc. to meet our customers' R&D and production needs. Please visit https://www.refractorymetal.org for more information.
Post je objavljen 22.08.2019. u 12:19 sati.