Acidified water glass in the selective flotation of scheelite from calcite, Part I: performance and impact of the acid type

• Autorzy: Kupka Nathalie , Möckel Robert , Rudolph Martin

Identyfikatory

DOI

10.37190/ppmp19101

• Języki publikacji: EN

Abstrakty

EN

To improve the performance of sodium silicate in scheelite flotation and allow the selective separation of scheelite from other semi-soluble salt-type minerals such as calcite, three acids, sulfuric, oxalic and for the first time hydrochloric are used to acidify sodium silicate (also called water glass). A literature review of previous usage of acidified water glass shows that no comparison between acids was made before, that comparisons with alkaline water glass were limited and that the idea that acidified water glass is more efficient at lower dosages has not been proven in scheelite flotation. As a consequence, the impact of the acid type, the ratio between acid and sodium silicate and acid dosage is tested in single mineral flotation and batch flotation experiments. All three acids allow a higher performance of acidified water glass compared to alkaline water glass at lower dosages and with little addition of acid: the tungsten recovery and grade are improved while silicates and to a lesser extent calcium-bearing minerals float less. The dosage of acid is less determining than the mass ratio of the acid to sodium silicate, except in the case of hydrochloric acid. Overall, the acid type does not matter as all three acids perform well in flotation, whereby oxalic and hydrochloric acid are better.

Słowa kluczowe

EN

acidified water glass; scheelite calcite separation; froth flotation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2020
• Tom: Vol. 56, iss. 2
• Strony: 238--251
• Opis fizyczny: Bibliogr. 28 poz., rys., wykr., wz.

Twórcy

autor

Kupka Nathalie

• Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany

autor

Möckel Robert

• Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany

autor

Rudolph Martin

• Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany

Bibliografia

• BERLINSKII, A.I., KLYUEVA, N.D., 1972. Interaction of alkaline and acidic water glass with some calcium minerals studied by infrared spectroscopic method. Obogashchenie Rud, 17, 16-18.
• CHINBAT, D., 2017. Investigation of the depression mechanism of acidified water glass in scheelite flotation. Master Thesis. In: Helmholtz Institute Freiberg for Resource Technology, Helmholtz Center Dresden-Rossendorf, Germany, 96 pages.
• DENG, J., LIU, C., YANG, S., LI, H., LIU, Y., 2019. Flotation separation of barite from calcite using acidified water glass as the depressant. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 579, 123605.
• DONG, L., JIAO, F., QIN, W., ZHU, H., JIA, W., 2018. Effect of acidified water glass on the flotation separation of scheelite from calcite using mixed cationic/anionic collectors. Applied Surface Science, 444, 747-756.
• FENG, B., LUO, X., WANG, J., WANG, P., 2015. The flotation separation of scheelite from calcite using acidified sodium silicate as depressant. Minerals Engineering, 80, 45-49.
• FOUCAUD, Y., FILIPPOVA, I.V., FILIPPOV, L.O., 2019. Investigation of the depressants involved in the selective flotation of scheelite from apatite, fluorite, and calcium silicates: Focus on the sodium silicate/sodium carbonate system. Powder Technology, 352, 501-512.
• FUERSTENAU, M., GUTIERREZ, G., ELGILLANI, D.A., 1968. The influence of sodium silicate in nonmetallic flotation systems. In Transactions. AIME, New York, pp. 319-323.
• GAO, Y., GAO, Z., SUN, W., HU, Y., 2016. Selective flotation of scheelite from calcite: A novel reagent scheme. International Journal of Mineral Processing, 154, 10-15.
• HAN, H., HU, Y., SUN, W., LI, X., CAO, C., LIU, R., YUE, T., MENG, X., GUO, Y., WANG, J., GAO, Z., CHEN, P., HUANG, W., LIU, J., XIE, J., CHEN, Y., 2017. Fatty acid flotation versus BHA flotation of tungsten minerals and their performance in flotation practice. International Journal of Mineral Processing, 159, 22-29.
• ILHAN, S., KALPAKLI, A.O., KAHRUMAN, C., YUSUFOGLU, I., 2013. The investigation of dissolution behavior of gangue materials during the dissolution of scheelite concentrate in oxalic acid solution. Hydrometallurgy, 136 (Supplement C), 15-26.
• KANG, J., HU, Y., SUN, W., LIU, R., YIN, Z., TANG, H., MENG, X., ZHANG, Q., LIU, H., 2018. A significant improvement of scheelite flotation efficiency with etidronic acid. Journal of Cleaner Production, 180, 858-865.
• KUPKA, N., BABEL, B., CHINBAT, D., RUDOLPH, M., 2017. Performance of acidified water glass in scheelite flotation against calcite. In: Flotation '17, ed. MEI, Cape Town, South Africa.
• KUPKA, N., RUDOLPH, M., 2018a. Froth flotation of scheelite - A review. International Journal of Mining Science and Technology, 28, 373-384.
• KUPKA, N., RUDOLPH, M., 2018b. Role of sodium carbonate in scheelite flotation – A multi-faceted reagent. Minerals Engineering, 129, 120-128.
• LIU, C., FENG, Q., ZHANG, G., CHEN, W., CHEN, Y., 2016. Effect of depressants in the selective flotation of scheelite and calcite using oxidized paraffin soap as collector. International Journal of Mineral Processing, 157, 210-215.
• MARTINS, J.I., AMARANTE, M.M., 2012. Scheelite Flotation From Tarouca Mine Ores. Mineral Processing and Extractive Metallurgy Review, 34, 367-386.
• MIESSLER, FISCHER, TARR, 2019. 6.3.2 Brønsted-Lowry Superacids and the Hammett Acidity Function. In: Inorganic Chemistry. US Department of Education.
• PATIL, D., NAYAK, U., 1985. Selective Flotation of Scheelite and Calcite. In: Proceeedings of National Seminar on Mineral Processing and IX Annual Technical Convention of Indian Institute of Mineral Engineers, March 11th/12th 1985, National Metallurgical Laboratory (CSIR), Jamshedpur., pp. 272-281.
• SUTHERLAND, K.L., 1948. Physical chemistry of flotation. XI: Kinetics of the flotation process. Journal of Physical and Colloid Chemistry, 52, 394-425.
• TIAN, J., XU, L., SUN, W., ZENG, X., FANG, S., HAN, H., HONG, K., HU, Y., 2019. Use of Al2(SO4)3 and acidified water glass as mixture depressants in flotation separation of fluorite from calcite and celestite. Minerals Engineering, 137, 160-170.
• VAZQUEZ, L.A., RAMACHANDRAN, S., GRAUERHOLZ, N.L., 1976. Selective flotation of scheelite. In Flotation - A.M. Gaudin Memorial AIME, New York, pp. 580-596.
• WEI, Z., HU, Y., HAN, H., SUN, W., WANG, R., WANG, J., 2018. Selective flotation of scheelite from calcite using Al. Na2SiO3 polymer as depressant and Pb-BHA complexes as collector. Minerals Engineering, 120, 29-34.
• XUIN, G.H., YU, D.Y., SU, Y.F., 1986. Leaching of scheelite by hydrochloric acid in the presence of phosphate. Hydrometallurgy, 16, 27-40.
• YANG, X., ROONASI, P., & HOLMGREN, A. (2008). A study of sodium silicate in aqueous solution and sorbed by synthetic magnetite using in situ ATR-FTIR spectroscopy. Journal of colloid and interface science, 328(1), 41-47.
• YANG, Y., XU, L., TIAN, J., LIU, Y., HAN, Y., 2016. Selective flotation of ilmenite from olivine using the acidified water glass as depressant. International Journal of Mineral Processing, 157, 73-79.
• YONGXIN, L., CHANGGEN, L., 1983. Selective flotation of scheelite from calcium minerals with sodium oleate as a collector and phosphates as modifiers. I. Selective flotation of scheelite. International Journal of Mineral Processing, 10, 205-218.
• ZHOU, Q., LU, S., 1992. Acidized sodium silicate - an effective modifier in fluorite flotation. Minerals Engineering, 5, 435-444.
• ZHOU, W., MORENO, J., TORRES, R., VALLE, H., SONG, S., 2013. Flotation of fluorite from ores by using acidized water glass as depressant. Minerals Engineering, 45, 142-145.