Microemulsion method of molybdenum ore collecting agents
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A collector and micro-emulsification technology, applied in solid separation, flotation and other directions, can solve the problems of reduced probability of molybdenite particle collision, reduced flotation efficiency, poor dispersibility, etc., to achieve a transparent and clear appearance and improve dispersibility. , good stability
Inactive Publication Date: 2013-04-10
SHANDONG UNIV OF SCI & TECH
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[0003] Hydrocarbon oils are insoluble in water, poorly dispersible in water, and can only exist in the form of oil droplets (>1mm), while the particle size of flotation molybdenite particles is generally below 0.5mm, and the particle size of dispersed oil droplets Larger oil droplets will reduce the probability of collision with molybdenite particles and reduce flotation efficiency. In addition, too large oil droplets will be excessively adsorbed by smaller molybdenite particles, resulting in waste of reagents
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Embodiment 1
[0023] Raw materials: 1.5 g of No. 0 light diesel oil, Tween 80 (1.07 g) and Span 60 (0.68 g) were mixed to obtain 1.75 g of the main emulsifier (HLB value 11), 1.55 g of n-amyl alcohol, and 2.0 g of water.
[0024] Preparation method: Mix No. 0 light diesel oil, a mixture of Tween 80 and Span 60, and n-amyl alcohol, and add water while stirring with a magnetic stirrer until it becomes transparent and clear.
[0025] The particle size distribution of oil droplets in the prepared molybdenite collector was detected by a dynamic light scattering instrument, and the results are shown in the attached figure 1 , The average particle size of the microemulsion is 25.44nm, the particle size is uniform, and the appearance is clear.
Embodiment 2
[0027] Raw materials: 1g of No. 10 light diesel oil, Tween 60 (0.87g) and Span 80 (0.33g) were mixed to obtain 1.2g of the main emulsifier (HLB value 12), 1g of n-amyl alcohol, and 2.5g of water.
[0028] Preparation method: same as Example 1.
[0029] The particle size distribution of oil droplets in the prepared molybdenite collector was detected by a dynamic light scattering instrument, and the results are shown in the attached figure 2 , The average particle size of the microemulsion is 21.59nm, the particle size is uniform, and the appearance is clear.
Embodiment 3
[0031] Raw materials: 1g of No.-35 light diesel oil, Tween 80 (1.06g) and Span 80 (0.24g) were mixed to obtain 1.3g of main emulsifier (HLB value 13), 1.1g of n-hexanol, and 2.6g of water.
[0032] Preparation method: same as Example 1.
[0033] The particle size distribution of oil droplets in the prepared molybdenite collector was detected by a dynamic light scattering instrument, and the results are shown in the attached image 3 , The average particle size of the microemulsion is 17.08nm, the particle size is uniform, and the appearance is clear.
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Abstract
The invention discloses a microemulsion method of molybdenite collecting agents. The microemulsion method adopts the following required substances in percentage by mass: 6 percent to 30 percent of hydrocarbon oil, 10 to 30 percent of main emulsifying agents, 5 to 30 percent of cosurfactants and the balance water, wherein the hydrocarbon oil is light diesel oil, the main emulsifying agents are mixtures of polyoxyethylene water loss sorbierite aliphatic ester (tweens) and dehydration sorbierite aliphatic ester (spans), the hydrophile-lipophile balance (HLB value) is 10 to 15, and the cosurfactants are C4 to C8 alcohol. The molybdenite collecting agents prepared by the method have transparent and clear appearance, wherein the grain diameter of oil drips is less than 50nm, the dispersity of the hydrocarbon oil in water is obviously improved, in addition, the preparation method is simple, the stability is good, no obvious change is caused after the placement for more than six months, and on the premise that the flotation concentrate grade is basically equal to the concentrate recovery rate, the oil saving rate can reach higher than 50 percent. The microemulsion method has the advantages that the collecting agents are applied to molybdenite flotation, the energy saving and the emission reduction are favorably realized, and the economic benefit is improved.
Description
Technical field [0001] The patent of the present invention relates to the technical field of molybdenite flotation, in particular to a microemulsification method of a molybdenite collector, and the prepared collector is mainly used for flotation of molybdenite. Background technique [0002] Because molybdenite has good natural buoyancy, flotation is the most widely used technology for molybdenite separation. Flotation is based on the differences in the physical and chemical properties of the mineral surface to achieve separation. In the molybdenite flotation process, non-polar neutral hydrocarbon oils, such as kerosene and diesel oil, are usually added, which are used as collectors to adsorb on the surface of molybdenite to form an oil film to enhance the hydrophobicity of the molybdenite surface. Make it firmly adhere to the surface of the bubbles to form mineralized bubbles, and then separate from the hydrophilic gangue minerals to achieve the purpose of separation. [0...
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