Fluorite is a CaF2 crystal in which the fluoride ion is more soluble than calcium ion, thus producing a surface having a higher calcium concentration than the fluorine concentration. At a higher pH, the adsorption of OH- in the solution neutralizes the positive charge on the surface. . Studies have shown that carboxylate anion collectors (such as oleic acid, palmitic acid and sodium oleate) are chemically adsorbed on the surface of fluorite and calcite. The sulfonate is specifically adsorbed on the mineral surface, and the cationic collector (RNH3+) Physically adsorbed on the mineral surface, oleic acid and sodium oleate are adsorbed on the surface of fluorite and calcite at different pH values ​​with different adsorption amounts. The flotation of such fine mineral salts as fluorite and fatty acids as collectors is mostly controlled by chemical action, and monolayer coverage and chemical bond formation occur between the adsorbate and the adsorbent. After complex solution chemistry, surface reaction, precipitation formation and heterogeneous agglomeration of weak electrolyte, oleic acid is adsorbed on the surface of fluorite by free COO- or (R-COO)2Ca, and the band of infrared spectrum is oleic acid. Caused by C=O stretching vibration peaks in the structure. In the low pH range, no absorption peak exists, and as the pH increases, the absorption peak becomes apparent, indicating that chemisorption becomes stronger. In the weakly acidic pH range, fatty acid calcium coagulated colloidal particles are formed on the surface of the fluorite, increasing the floatability of the fluorite. Oleic acid collectors are popular among fluorite producers because of their low price and wide range of sources, but there are also obvious shortcomings in the flotation, namely, low selectivity, poor antifreeze ability, and poor dispersion; The modified product has the disadvantages of easy decomposition and long-term delamination, which leads to good and bad use effects and is difficult to stabilize. The use of these agents requires the heating of the slurry, which not only requires an increase in construction investment, an increase in floor space, an increase in production costs, but also poisoning agents such as oxidized paraffin soap, and its application is limited. Aiming at the different ore-bearing properties, climatic characteristics and the shortage of fatty acid collectors, the development of new fluorite collectors and their mechanisms has become one of the hot spots in the development of fluorite ore dressing technology . The fluorite was recovered from the Shizhuyuan floating tungsten tailings by the new H06 collector. The sorting efficiency was 61%, which was 24% higher than that of oleic acid. The new collector H06 developed utilizes the difference in crystal structure between fluorite and garnet and the steric hindrance effect of the agent, so that it has good selective adsorption capacity. The selective order of several fluorite collectors is H06> Modified oleic acid > saponified oleic acid > oleic acid. At the same time, H06 has the characteristics of easy solubility, low temperature resistance and excellent stability, and has good adaptability to the ore properties of Shizhuyuan floating tungsten tailings. W series collectors are developed using new chemical raw materials. They can be used at room temperature. They have strong harvesting performance, good selectivity, strong applicability, wide pH range, and can be acidic or alkaline according to different ore properties. Used under sexual conditions. An activator can be added for activation to comprehensively improve the recovery index. W Series collector in Zhangbei Baimiao Beach fluorite ore, fluorite mine in Shandong Hongxing triple circle, Inner Mongolia fluorite ore Aohanqi, Inner Mongolia Xilinhot Xinyuan fluorite ore, Zhejiang Juhua Group fluorite processing plant applications , the effect is good. At room temperature application, there is no other modification to the process. The recovery index is higher than the recovery index of oxidized paraffin soap, and the recovery rate can be increased by 2% to 5%, which reduces the production cost. The matrix of GY-2 collector is a by-product of petroleum refining process, containing 33.13% of total organic matter, 14.07% of unsaponifiable matter, and less than 1% of free base. The appearance of matrix at room temperature is brownish black thick liquid. GY-2 collector is a mixture of matrix and synergist (5:1) used as collector flotation fluorite. At 600g/t, fluorite concentrate contains 98.34% CaF2, and the recovery rate is 85.61%. Y Zhang et al. used strong naphthenate (GY-2) as a collector, and copper sulfate as an inhibitor to inhibit phosphate minerals. The test results show that the use of strong naphthenic acid instead of ordinary fatty acids can not only float at low temperature, but also improve the separation efficiency and reduce the cost of the medicament. The use of strong naphthenate as a collector at 10 ° C when the grade and recovery of fluorite concentrate are higher than the fatty acid 35 ° C; copper sulfate has a good inhibitory effect on phosphate minerals. Young Jin Lin and other studies using a new collector XJD-01 fluorite flotation achieved under normal temperature conditions, the use of coarse flotation tailing - Coarse regrinding selection - selection process in a single mine, Two grades of fluorite concentrate with CaF2 recovery rate of 49.20% and four grades of fluorite concentrate with CaF2 recovery rate of 37.94% were obtained. The flotation effect is obviously better than the oleic acid warming flotation, and the content of impurities in the concentrate is effectively reduced by adding sodium sulfide in the selective cycle. headphones display stand, acrylic headphone display, headphone display rack, acrylic headphone display stand, earphone display stand, acrylic earphone display stand Shenzhen Apex Artcrafts Co,.LTD , https://www.apexdisplaycn.com
Flotation technology is an important means of fluorite recovery. It has been widely used in fluorite extraction and recovery process and is a relatively mature mineral processing technology. Fluorite flotation collectors generally use fatty acid agents, and oleic acid and its modified products are the most commonly used in industrial flotation processes. Since fluorite, calcite and apatite minerals belonging sparingly soluble salt minerals, studies show that: fluorite samples from different areas of its dissolution properties different point of zero charge can cause a great difference fluorite, fluorite as The zero point can vary from 2.2 to 10.6, which will result in different pH conditions for controlling flotation.