Rhenium ingot manufacturers tell you that the raw materials for rhenium production are mainly from the by-products of the molybdenum smelting process. Generally, the content of rhenium in molybdenite concentrate is between 0.001% and 0.031%. However, the molybdenum concentrate selected from porphyry copper ore contains rhenium up to 0.16%. In addition, some copper ore, platinum group metal ore, niobium ore, sphalerite smelting smoke, slag and waste liquid of low-grade molybdenum ore treatment and rhenium-containing waste such as platinum-rhenium catalyst and rhenium-containing waste alloy can also be used as Raw material for rhenium production.

The Rhenium ingot manufacturer tells you that the extraction method of rhenium needs to be determined according to the rhenium-containing raw materials and rhenium products. When extracting rhenium, the rhenium-containing solution is first prepared from the rhenium-containing raw material, and the solution is separated and purified to extract pure rhenium compounds, and then the rhenium powder is prepared by the hydrogen reduction method, the aqueous solution electrolysis method and the halide thermal dissociation method, and then the powder metallurgy method is used. processed into material. The Rhenium ingot manufacturer tells you that the metallurgical process of rhenium extraction mainly includes the preparation of rhenium-containing raw materials, the separation of rhenium and molybdenum, the preparation of rhenium intermediate compounds, the preparation of crude rhenium powder, and the refining and densification of rhenium.
There are two methods for industrial production of rhenium ingots or rhenium bars: high temperature sintering method and smelting method.
1. High temperature sintering method (also known as powder metallurgy method)
First, the rhenium powder is made into billets under the pressure of 6MPa, the billets are sintered at 1200 ℃ in vacuum or ammonia gas, and then the pre-sintered billets are sintered at 2700-2850 ℃ in a vertical melting furnace, and finally the theoretical density is obtained. Over 90% rhenium bars.
2. Smelting method
In this method, sintered bars are used as raw materials, and crude rhenium is purified and refined by arc melting, electron beam melting and zone melting. The manufacturer of Rhenium ingot tells you that the rhenium ingot obtained by the electron beam melting method is a columnar crystal with a purity of 99.99%; the product obtained by the regional melting is a rhenium single crystal with spectral purity.
At present, rhenium extraction metallurgy has formed a pattern of three major links: rhenium compound, rhenium powder and rhenium material. Rhenium ingot manufacturers tell you that the tasks for the future development of the rhenium smelting industry are to expand the source of rhenium raw materials, improve the recovery rate of rhenium in the smelting process of molybdenum and copper, develop and improve flash roasting furnaces and circulating fluidized roasting methods, and at the same time develop more New processes for efficient rhenium recovery, especially solvent extraction and ion exchange.