Novel method for enriching metal rhenium in high-temperature alloy waste recovery technology
A waste recycling and high-temperature alloy technology, which is applied in the recovery of rare metal rhenium and the enrichment of metal rhenium, can solve the problems of low direct recovery rate of rare metals, low ion exchange efficiency, and high cost of environmental protection treatment, so as to improve the primary recovery rate, The effect of high direct yield and simplified production process
Active Publication Date: 2014-09-24
昆明铂生金属材料加工有限公司
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Problems solved by technology
The process generally includes leaching, chemical pre-removal of impurities, extraction and removal of impurities, nickel-cobalt separation and other processes, but this process is long, high energy consumption, large acid consumption, high cost of environmental protection treatment, and low direct recovery rate of rare metals, easy to Lost in the process, the economic benefit is not obvious
Especially in the enrichment and separation process of metal rhenium, the ion exchange efficiency is low, the initial investment cost of strong base ion exchange resin is high, and regeneration is difficult
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] Concrete processing steps of the present invention are:
[0023] 1) Melt and cast nickel-based superalloy scraps into electrolytic plates.
[0024] 2) In the way of AC electrolysis, at 2-6V, frequency 2-50Hz, current density 10-100A / dm 2 , The solution system is 10-30% hydrochloric acid solution, the electrode distance is 1-5cm, the solution temperature is 20-40°C, the stirring speed is 20-60rpm, and the electrolysis time is 10-40 hours.
[0025] 3) The solution after electrolysis is filtered and washed to obtain metal-containing rhenium ions (HReO 4 ) filtrate and rhenium oxide (ReO 2 ) of the filter residue.
[0026] 4) Treat the filtrate with 10-50% (volume ratio) sodium hydroxide solution (volume ratio 1:2-4), and filter and separate to obtain Al(OH)-containing 3 , Cr(OH) 2 , Ni(OH) 2 , Co(OH) 2 Precipitation of hydroxide mixtures, and NaReO containing 4 and Na 2 MoO 4 In the filtrate, the concentration of metal rhenium ions is 0.5-50 g / l. The filter resi...
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Abstract
The invention relates to a method for enriching metal rhenium in a high-temperature alloy waste recovery technology. The method is characterized by comprising the following steps of: adopting kieselguhr for replacing strong basic resin adopted in wet-process metallurgy, treating filtrate containing metal rhenium ions, enriching the metal rhenium ions in the filtrate by using the characteristics such as large porosity, strong adsorbability and stable chemical property of the kieselguhr, and soon afterwards, purifying the rhenium. The method has the remarkable advantages that the strong adsorption capacity and selectivity of the kieselguhr on the metal rhenium ions are used for enriching the metal rhenium ions in the filtrate; compared with ion exchange adsorption, the kieselguhr has high adsorption efficiency on the metal rhenium ions, increases the direct yield of the metal rhenium and is easy to desorb; lots of inorganic acids do not need to be consumed; the technological process is greatly shortened; the production working procedure is simplified; the environmental friendliness pressure is reduced; and simultaneously, high economic benefits are achieved. The method is a comprehensive recovery technology which is concise, short in technological process, small in specific volume and low in cost and has little pollution; and reports related to the method are not found at home and abroad.
Description
technical field [0001] The invention relates to a method for metal rhenium enrichment in the recycling process of high-temperature alloy waste, especially in the field of comprehensive recovery of nickel-based high-temperature alloy waste containing rare and precious metals such as rhenium, ruthenium, tungsten, molybdenum, tantalum, etc. Recovery of rare metal rhenium with short process and high recovery rate. Background technique [0002] Nickel-based superalloys refer to austenitic alloys based on nickel (more than 50% nickel). In the range of 650-1100°C, it has comprehensive properties such as high strength, good oxidation resistance and corrosion resistance, good fatigue performance, and fracture toughness. It is widely used to manufacture the hottest parts of aviation jet engines and various industrial gas turbines. It can also be used as high-temperature components of rocket engines, nuclear reactors, petrochemical and energy conversion equipment, etc. [0003] Nick...
Claims
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IPC IPC(8): C22B3/24C22B61/00
CPCY02P10/20
Inventor 王玉天胡劲张维钧文劲松张庆林上官映泉
Owner 昆明铂生金属材料加工有限公司