Molybdenum Concentrate Impurities

3 produced after roasting contains plenty of impurities (Wilkomirshy, 1979). The impurities ... (1973) have carried out the soda ash roasting of the molybdenum concentrate along with Fe 2O 3. Iron oxide in the presence of soda ash oxidize the concentrate to form a multi-variant compound i.e. Na 2MoO 4 as above. In this study, they converted ...

Molybdenite is the most important molybdenum concentrate, which is mainly recovered as a by-product from porphyry copper deposits. Due to the low efficiency of purification processes such as flotation in the reduction of copper content of molybdenum concentrate to a standard level (i.e., less than 0.5 wt.%), further purification by a hydrometallurgical method is …

Sulfides of other metals (FeS 2, Cu 2 S, ZnS, NiS, etc.) present as impurities in commercial molybdenum concentrates oxidize at the same time. ... Despite the seeming simplicity of roasting of molybdenum concentrate, industrial realization of the process to get concentrate suitable for smelting of standard ferromolybdenum is a complex process. ...

the potassium level in the roasted molybdenum concentrate prior the first treatment step is on average approximately 1600 weight- ppm and the level of copper is on average approximately 0.45 % by weight, compared to the total weight of RMC, nevertheless, the method according to the present invention reduces the concentration of impurities in ...

the solubilities of molybdenum in NaCl solutions are also given. 2．Experimental 2・1 Electro-oxidation experiment The molybdenum concentrate used in this study was ob-tained from Erdenet Mine of Mongolia, which contains 95 % of MoS2. Major impurities are iron and copper at the level between 1 and 2 mass%, and it contains about 40 mass ppm of ...

Potassium is present in molybdenum concentrate in the form of soluble potassium ions and four potassium minerals. During the roasting process of molybdenum concentrate, …

The invention relates to a method for purifying molybdenum disulfide by leaching molybdenum concentrate with chlorate, belonging to the field of wet-process metallurgy. The method comprises the steps of: removing metal sulfide impurities in the molybdenum concentrate used as raw material by heating a leaching solution, wherein the leaching solution is a mixed solution of …

The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling. Whether impurity minerals can be converted into soluble ions during roasting is important for the impurity removal by current water washing. In this work, the interaction between various impurity elements in the treatment process of …

Thermodynamic analysis indicated the feasibility of oxidation roasting of molybdenum concentrate. The effects of roasting temperature, holding time, and power-to-mass ratio on the oxidation product and leaching product sodium molybdate (Na2MoO4·2H2O) were investigated. ... Iron and aluminum impurities can be effectively separated by adjusting ...

In this research, purification of molybdenite concentrate (MoS 2) using a nitric acid leaching process was employed for the improvement of molybdenum xide morphology …

The impurity elements, such as P, S, Cu, As, Pb, Sn, in the molybdenum products are very low. ... The results show that the thermal decomposition process of molybdenum concentrate in vacuum is feasible when the temperature is in the range of 1773-2073 K and the furnace pressure is less than 100 Pa. Pb S, Sn S2 and As2S3 in the molybdenum ...

The molybdenum oxide containing 70.00% MoO 3, 2.49% Cu 2 O, 1.97% Fe 2 O 3 and 11.22% SiO 2 obtained after roasting of molybdenite concentrate was used for the experimental purpose. Major impurities such as copper and iron were leached out from molybdenum oxide using 1.5% H 2 SO 4 while maintaining a solid to liquid (S/L) ratio of 1 with …

Controllable chlorination of iron in molybdenum concentrate was achieved by a solid chlorination agent directly based on the order of reactions. Vacuum chlorination roasting …

Thermodynamic analysis indicated the feasibility of oxidation roasting of molybdenum concentrate. The effects of roasting temperature, holding time, and power-to-mass ratio on the oxidation product and leaching product sodium molybdate (Na 2 MoO 4 ·2H 2 O) were investigated. ... Iron and aluminum impurities can be effectively separated by ...

In the roasting process of molybdenum concentrate, K-containing minerals, such as muscovite and orthoclase, can be transformed into K+, Al3+ and other soluble ions, and then can be removed by...

molybdenum processing, preparation of the ore for use in various products.. Molybdenum (Mo) is a white platinum-like metal with a melting point of 2,610 °C (4,730 °F). In its pure state, it is tough and ductile and is characterized by moderate hardness, high thermal conductivity, high resistance to corrosion, and a low expansion coefficient.When alloyed with other metals, molybdenum …

low-grade molybdenum concentrate was provided. 2 Experimental 2.1 Materials The chemical composition of molybdenum concentrate is shown in Table 1. The molybdenum content is 39.27%, which is lower than that of standard-molybdenum concentrate with Mo content above 45%. The impurity substances mainly consist of SiO 2

When roasted at 650 °C for 90 min, the molybdenum retention rate and the sulfur-fixing rate of low-grade molybdenum concentrate reach and 92.92%, respectively, and the dissolution rate of ...

3 Technical Centre, Jinduicheng Molybdenum Co., Ltd., Xi'an 710077, China * Correspondence: [email protected] Abstract: The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling. Whether impurity minerals can be converted into

molybdenum concentrate, several stages of cleaner flotation followed ... concentrate impurity penalties are stringent and smelting terms can be expensive. Further, little if any credit for by ...

Keywords Low-grade molybdenite concentrate ·Impurities ·E-pH ·Purification Introduction Molybdenum (Mo) is an essential element that is widely used in the steel industry, chemical industry, non-ferrous metallurgy, and agriculture [1]. By 2015, the global molybdenum production had reached 235,000 metric tons, which is sixteen times

Based on previous research work, the impurities in the molybdenum concentrate raw material probably include sulfides and oxides [20, 21]. In this work, by calculating and analyzing the relation between the saturated vapor pressure and temperature of these substances, a vacuum distillation method was proposed to achieve the purification of MoS 2 .

Request PDF | Volatilization behavior of impurities in molybdenum concentrate through vacuum distillation | A method for separation of metal sulfides in molybdenum …

The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling. Whether impurity minerals can be …

DOI: 10.1016/j.vacuum.2022.110926 Corpus ID: 246460152; Volatilization behavior of impurities in molybdenum concentrate through vacuum distillation @article{Li2022VolatilizationBO, title={Volatilization behavior of impurities in molybdenum concentrate through vacuum distillation}, author={Yang Li and Xuquan Wang and Fei Wang and Yang Tian and Bin Yang}, …

The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling. Whether impurity minerals can be converted into soluble ions during … Expand [PDF] 1 Excerpt; Save. Study on reduction of MoS2 powders with activated carbon to produce Mo2C under vacuum conditions.

The maximum rate of soluble molybdenum was approximately 80% due to insoluble molybdate caused by the high impurity content in molybdenum concentrate. (2) With increasing roasting temperature and roasting time, the volatilization rate of rhenium increased but still lagged behind the oxidation efficiency of molybdenum. When molybdenum was ...

The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling. Whether impurity minerals can be converted into soluble ions ...

Molybdenum (Mo) is an essential element that is widely used in the steel industry, chemical industry, non-ferrous metallurgy, and agriculture [].By 2015, the global molybdenum production had reached 235,000 metric tons, which is sixteen times the level in 1950 [].As the demand for molybdenum is increasing rapidly, the high-grade molybdenite concentrate used to …

In this study, the deep purification of low-grade molybdenite concentrates have been investigated via both theory and experiments. E-pH calculation shows that acid system is beneficial to the …