Due to the wide application of molybdenum in the fields of steel, electronics, chemical industry, etc., the mining and beneficiation of molybdenum ore have also received more and more attention. Choosing the right beneficiation process is of great significance to improving the utilization rate of molybdenum ore resources and economic benefits. Flotation process is the core process of molybdenum ore beneficiation, which has the advantages of high selectivity and high recovery rate. The optimization of flotation process and the innovation of flotation reagents are directly related to the utilization level of molybdenum ore resources and the economic benefits of the beneficiation plant. The following article will introduce the flotation process of molybdenum ore and the use of beneficiation reagents to help you better understand the molybdenum ore beneficiation process.
1. Molybdenum ore flotation principle
The flotation process of molybdenum ore is based on the difference between the hydrophobicity and hydrophilicity of the mineral surface. After crushing and grinding, the ore is placed in the flotation equipment, and flotation reagents are added to adjust the surface properties of the mineral, so that molybdenite and bubbles are combined, thereby separating the molybdenum ore from the gangue minerals. The flotation process will be affected by many factors such as mineral particle size, reagent type and flotation time. Appropriately adjust the flotation process to reduce the impact of these factors and improve the flotation efficiency. Commonly used molybdenum ore flotation equipment includes mechanical stirring flotation machine and aerated stirring flotation machine, which are selected according to the specific process.
2. Molybdenum ore flotation process
The molybdenum ore flotation process mainly includes: crushing and grinding, flotation separation, dehydration and concentration.
Crushing and grinding: After the molybdenum ore is coarsely crushed, medium crushed and finely crushed, the mineral particle size meets the flotation requirements, and the ore is processed by a ball mill or a rod mill for the next step to ensure that the target mineral is separated into monomers.
Flotation separation: Molybdenum ore flotation generally adopts roughing, concentrating and scavenging. Roughing can quickly enrich molybdenite, concentrating can further improve the grade of concentrate, and scavenging is to recover the tailings in roughing and concentrating to avoid the waste of molybdenum ore resources.
Dehydration and concentration: The molybdenum concentrate after flotation needs to be concentrated and filtered to remove excess water and finally obtain qualified concentrate.
In the molybdenum ore flotation process, the selection of reagents is crucial to the flotation effect. Commonly used reagents include collectors, frothers and regulators.
Collectors: can enhance the hydrophobicity of the molybdenite surface, making it easier to adsorb on bubbles. Types of molybdenum ore flotation collectors include: xanthate, black medicine, alkyl sulfate, etc.
Frothers: mainly used to control the number, size and stability of bubbles. Commonly used frothers for molybdenum ore flotation include rosin oil, methyl isobutyl carbinol (MIBC) and alcohols.
Regulators: There are pH adjusters, inhibitors and activators. pH adjusters include lime, etc., which are mainly used to control the pH of the slurry. Inhibitors include water glass, which is mainly used to selectively inhibit the flotation of gangue minerals. The role of activators is to enhance the activity of molybdenum minerals.
How to choose flotation reagents?
The mineral composition of molybdenum ore is complex, and different types of molybdenum ore have different needs for flotation reagents. The flotation of complex and difficult-to-separate molybdenum ores requires the combined use of multiple chemicals. By adjusting the types of flotation reagents and optimizing the ratio of flotation reagents, the molybdenum recovery rate and concentrate grade can be significantly improved, and production costs and environmental pollution caused by reagents can also be reduced
Intelligent and automated flotation process
With the development of intelligent and automated mineral processing equipment, the flotation process can monitor parameters such as pulp concentration, pH value, bubble state, etc. in real time through sensors, and combine big data for data analysis to achieve precise control and optimization of the flotation process.
Green and efficient reagents
With the strengthening of environmental awareness, green and efficient reagents can ensure the flotation effect while reducing the negative impact on the environment. The design and development of new flotation reagents can meet the needs of green mine construction.
Cooperative optimization of flotation process and reagents
The optimization of flotation process and the selection of reagents are interdependent. The flotation efficiency of molybdenum ore can be effectively improved by adjusting the process conditions and combining efficient flotation reagents.
In summary, choosing a reasonable molybdenum ore flotation process, efficient flotation equipment and optimizing the use of chemicals can effectively improve the flotation effect. For different molybdenum ore types, optimizing the type and dosage of chemicals can significantly improve the concentrate grade and recovery rate. With the widespread application of intelligent and automated equipment, the molybdenum ore flotation process will be more efficient, environmentally friendly and intelligent, further assisting the efficient utilization of molybdenum ore resources and the construction of green mines.
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