Study On The Test And Mechanism Of New Pharmacy For Flotation

China is an agricultural country with a large population, making agriculture the foundation of national economy. Chemical fertilizer has always been an important material for the food production and increasing. It is also the key to maintaining the food supply for over one billion people in China. Phosphate rock resources is the important raw material for phosphate fertilizer production, so phosphate rock resources have become the strategic mineral resources of grain safety, even a factor determining the country’s stability. Since the nature of China’s phosphate is far less than desirable, mineral processing is highly depended upon. In addition to this, most phosphate resources of China is collophanite, which means separation is difficult, being of high processing cost, so our country enterprises of phosphate consume high grade phosphate, while the majority of middle-low grade phosphate rock resources have not been effective developed and utilized. At present, with the situation on resources tensed, the development and utilization of middle-low grade phosphate resources has become highly concerned by Chinese government.This thesis research project is the collophanite in Wengfu, Guizhou. Based on modern test and analysis methods, combined with the test of mineral processing, it has found out the characters of the mine and developed normal temperature direct floatation reagents and flotation flow of collophanite and analyzed mechanism of action between the new reagents and collophanite.The results of process mineralogy indicate that the raw ore is siliceous-calcareous collophanite, containing25.50%P2O5,19.31%SiO2and37.22%CaO. The useful minerals are mainly the collophanite, and gangue minerals are dolomite, hydromica, quartz, etc. Harmful components of A12O3and MgO exist in dolomite and hydromica respectively, SiO2mainly exist in quartz and hydromica.Combined with reagent compounding technology, a new type direct flotation collector was developed. It is used in normal temperature of collophanite, which was named EM-LP-01. The new reagent is used in actual mineral processing. Conclusions are as following:(1) The making of new reagent:firstly, saponification of the combination of Oleic acid, linoleic acid and linolenic acid at the ratio of3:2:1; Secondly, combine sodium dodecyl sulfate with the OP-10at1:1and made into composite synergistic agent; finally, compound combined fatty acid soap in combination with composite synergistic agent at100:20and got a new type direct flotation collector EM-LP-01.(2) In the combined fatty acid, the amount and proportions of oleic acid, linoleic acid and linolenic acid have a bigger influence on the collophanite flotation. The collecting ability of oleic acid is profoundly inferior to linoleic acid and linolenic acid, but relatively better selectivity. When the three work together, the flotation effect is superior to any single reagent results.(3) Under normal temperature conditions, using directly-reverse flotation flow and new type collector EM-LP-01, getting the P2O5concentrator, in which P2O5grade is30.86%and P2O5recovery rate is89.57%, MgO grade is only0.77%. Adjust the dosage of reagent and internal process, but also can obtain high quality phosphate concentrate in which P2O5grade is32.29%, P2O5recovery rate is84.22%and MgO grade is0.64%. The research results show that the dissolution and dispersion of EM-LP-01are satisfactory, its selectivity and collecting ability is strong, and it can effectively achieve flotation of collophanite in the normal temperature.In order to further study the nature of the new reagent for action, testing methods such as contact angle, surface tension of solution, TOC, Zeta potential, infrared spectroscopy, XPS are utilized. Through studying the mechanism action of combined fatty acid which is collecting component of new reagent EM-LP-01and synergy effect of synergistic agent respectively, following conclusions are drawn:at pH9.5, combined fatty acid can significantly reduce the solution surface tension. When the reagent concentration is more than half micelle concentration of30mg/L, the mineral surface hydrophobicity is improved obviously. Combined fatty acid on the collophanite mineral surface is mainly combined with calcium atoms, and then produced the chemical adsorption. After adding SDS, combined fatty acid solution reduces surface tension, SDS promoted the reagent in the gas/liquid interface adsorption, but SDS itself in collophanite surface adsorption is considerably weak, thus cannot be used independently as a collector. When adding the synergistic agent OP-10sequentially, reagent adsorption density increase further, the OP-10adsorption is exceedingly weak or mainly physical adsorption.Through the research conducted in this thesis, the mechanism of action between the direct flotation collector EM-LP-01used in normal temperature and the collophanite can be more comprehensively appreciated, useful in developing directly flotation collector used in normal temperature and the new flotation technology of collophanite. Through the research conducted in this thesis, the mechanism of action between the direct flotation collector EM-LP-01used in normal temperature and the collophanite can be more comprehensively appreciated, useful in developing new collector EM-LP-01and the new flotation technology of collophanite.