Welcome to visit us!
Feb 15, 2019 The spent graphite was firstly obtained by the two-stage calcination, and it suffered acid leaching to get the leach residue of graphite and the leach liquor. Approximately 100% lithium, copper and aluminum enter the leach liquor by acid leaching under the conditions of 1.5 M HCl, 60 min and S/L = 100 g L −1 , thus obtaining regenerative ...Get Price
You can send a message to us by this email [email protected]
Your email will only for contact and not be shared with any third parties.
Keywords: graphite, nuclear material, INAA, acid leaching, element determination 1. Introduction Graphite which is a naturally occurring crystal carbon polymorphs is composed of a series of stacked parallel layer planes of the carbon structure. Graphite has been widely used in many application in various fields, such as metallurgy
Aug 17, 2016 The results showed that the alkali roasting pre-treatment and acid leaching process could enhance the fixed carbon of microcrystalline graphite to a higher level. Under the optimum conditions selected, a graphite product with fixed carbon content of 99.0% was obtained from microcrystalline graphite concentrate with carbon content of 90.keegan gold mine in chad.2%.
Jan 31, 2019 The obtained graphite concentrates with an enriched carbon content above 90% after flotation was subjected to chemical treatment process including alkali roasting and acid leaching…
For microcrystalline graphite purification, the alkali-acid leaching process is an appropriate choice [5,6]. The dissolution behavior and phase transition of sericite in alkali-acid leaching are of great significance to understanding the chemical purification process of microcrystalline graphite.
The obtained graphite concentrates with an enriched carbon content above 90% after flotation was subjected to chemical treatment process including alkali roasting and acid leaching, which yielded ...
Apr 18, 2017 —The leaching that we did at Clifton, for something over 20 years, was the simple process of an acid leach, with iron precipitation, and the wasting of all liquors. The modern leaching which you are about to attempt is something which you have developed and proven to your entire satisfaction and until such time as it is working out ...
Mar 01, 2021 Distilled water leaching of the microwave-treated product was carried out at a S/L ratio of 1:50, room temperature (25 C), and 1000 rpm for 10 min. The water leach solution was subjected to carbonation (CO 2 purging, 0.05 L/min) for 30 min, and vacuum filtration, and then evaporation for the recovery of Li 2 CO 3 values.
May 11, 2020 The acid leaching process is an effective method to remove the thin film iron from non-metallic minerals. The common leaching agents used in the acid leaching process are dilute sulfuric acid, concentrated sulfuric acid, hydrochloric acid, nitric acid and aqua regia, which can be used for gold, silver, copper, phosphorus, molybdenite and so on.
The leaching process for producing high-purity graphite from 87–93.5% to 99.4% carbon content was studied by using many factors, such as concentrated sodium hydroxide (NaOH, 15–35%) at 250 C, sulfuric acid concentration H 2 SO 4 of 10%, water washing, and finally drying.
A combined process was investigated to recover valuable metals from LiNi x Co y MnzO 2 cathode materials of spent lithium-ion batteries. In this approach, the cathode materials were first roasted with graphite which recycled from anode materials, and then conducted to a reductant-free sulfuric acid leaching for efficient recovery of valuable metals.
In the present study, a sulfuric acid leaching process in the presence of manganese(IV) oxide (MnO2) as oxidant and graphite as catalyst has been developed to augment metal recoveries from CAS. The leaching efficiencies of copper, nickel, tellurium, selenium and silver from CAS, and manganese from MnO2 achieved were 99.9%, 98.2%, 90.8%, 81.9% ...
The method for purification was acid leaching with acid variation of HF, H 2 SO 4 + HNO 3 with 1:1 ratio and HF+HCl+H 2 SO 4 with 1:1:1 ratio. Graphite and acid were mixtured for leaching at a 1:5 weight ratio. The mixtures were stirred for 3 hours and washed by aquadest for several times until free-acid graphite was obtained.
Aug 04, 2021 When Liu Yuhai et al.  used alkali melting and acid leaching to purify fine flake graphite in a place in Heilongjiang Province, by discussing the appropriate process parameters, the fixed carbon content of graphite was increased from 95.89% to 99.94% by alkali melting roasting water leaching acid leaching process.