Study On The Synthesis And Phosphate Flotation Performance Of Collector Cotton Oil Acid Apple Ester

To make the latest direct collector based on the better dispose of low and medium grade refractory collophanite in Qingping region of Sichuan province,the purpose of the experiment is to gain a new kind of excellent performance direct flotation collector.First,we can get a poly functional compound fatty acid collector–cotton oil acid apple ester collector through the chemical modification of cotton oil fatty acid.And then we compound it with a certain amount of mixed polyethenoxy ether surfactant,the compound product is the new kind of collector,which will be used in collophanite flotation.A series of single direct flotation tests were carried out to study the affect of pharmaceutical synthesis way;ratio of materials;reaction temperature and synthesis time on the flotation performance of new collector preliminary evaluated by flotation index.The synthetic method is:the mass ratio of anhydrous malic acid and cotton oil acid is 0.6:1,anhydrous malic acid and cotton oil acid join in the reactor,control temperature at 100-120 centigrade and react for 45mins.Then we will get light yellow transparent homogeneous liquid,totally saponifying it with 20%sodium hydroxide solution,controlling temperature at 80-90 centigrade.And then the mass ratio of saponification product and the two kinds of compound surfactant OP-4 and NP-5 is100:6.25:6.25,heating and stirring to uniformity.After that we get the compound collector MPON-135.With syntheticand compound medicament MPON-135 as direct and reverse flotation collector,at the grinding fineness of-0.074mm content 91.6%,flotation temperature control in 10 centigrade,under reagent regime of roughing sodium carbonate dosage of 6.0 kg/t,sodium silicate dosage of 2.0kg/t,collector MPON-135dosage of 1.3 kg/t,concentration without reagent,scavenging add MPON-135dosage of 0.3kg/t,reverse roughing sulfuric acid dosage of 6.0 kg/t,citric acid dosage of 0.6 kg/t and collector MPON-135 dosage of 0.45kg/t,scavenging sulfuric acid dosage of 3.0 kg/t,gain a concentrate rate of 62.90%,P₂O₅grade of 30.70%,MgO content of 0.75%,recoveryof 88.86%for the flotation indexthrough closed-circuit test with the ore grade of 21.96%of collophanite in Qingping region of Sichuan province.Zeta potential test,infrared spectrum analysis,surface tension test and single mineral flotation test showed that the mechanism of the MPON-135 is acting on the surface of collophanite by physical adsorption and the surface of dolomite by chemical adsorption,which increase the floatability by the means of reducing mineral dynamic potential to weaken hydration.By reducing the surface tension of the solution system,the mineral surface gets more hydrophobic and floatable.Thestrong-to-weak sequence of adsorption ability on single mineral is collophane>dolomite>quartz when the synthetic reagent MPON-135 is in pulp of pH=9.Synthetic reagent showed selective adsorption and best floatability on collophane surfaces,for quartz almost does not float,thus suitable for desilication in the positive flotation.Infrared spectrum testing data showed that the synthesized reagent has functional groups of carboxyl,hydroxyl and ester.Hydrophilic group of hydroxyl and esterincreased watersolubility of collector.Synthetic modification made cotton oil fatty acid formation a long carbon chain structure of ester carboxylic acid,which increased hydrophobic,collectivity and selectivity.With the advantage of stronger collectivity and better selectivity,low-temperature resistance,andwide raw material sources and low price cost,the synthetic and compound reagent has great significance on cutting flotation cost and enhancing recovery with a broad application prospect.