No abstract

Abstract. The purpose of this research is to recover slime waste from feldspar flotation plant at Attanee International Co., Ltd., Tak province. Slime waste with particle size less than 230 mesh, is found about 20% of the total ore feed. Since 1985, company has been producing slime waste approximately 200,000 tons, causing a huge pile of stock and obstructing the operation area. The mineral compositions of slime waste by X-Ray Diffraction (XRD) showed that it consisted of albite, orthoclase, quartz, and ferrous impurity minerals such as muscovite, biotite, mica, and garnet. The elemental analysis by X-Ray Fluorescent (XRF) showed that the percentage of grade contained 72.53% SiO2, 15.70% Al2O3, 1.56% Fe2O3, 0.16% TiO2, 0.40% CaO, 0.07% MgO, 4.87% K2O and 4.38% Na2O. After that, this slime waste was sent to the processes of dirt washing, classifying, attrition scrubbing, separating the ferrous impurity minerals, and preparing for flotation by washing drum, trommel, attrition scrubber, cone classifier, permanent drum magnetic separator, wet high intensity magnetic separator, and hydrocyclone. At this stage, the slime mainly consisted of albite, orthoclase, and quartz with 74.43% SiO2, 15.15% Al2O3, 0.12% Fe2O3, 0.04% TiO2, 0.43% CaO, 0.01% MgO, 4.73% K2O and 4.75% Na2O at a yield 35%. Study on fine feldspar flotation, which is for removing quartz from feldspar, showed that the optimum condition of 20% solids must be adjusted to pH 2 by hydrofluoric acid (HF), using A-TD as a collector at 1,400 grams per ton feed, conditioning time and flotation time of 5 minutes each. The results of the study showed that the recovery of feldspar attained 69.7% with 67.82% SiO2, 18.54% Al2O3, 0.14% Fe2O3, 0.03% TiO2, 0.52% CaO, 0.006% MgO, 6.88% K2O and 6.07% Na2O, which meet ceramic industry's specifications.

This is a repository copy of Encapsulation of Sr-loaded titanate spent adsorbents in potassium aluminosilicate geopolymer.

Gold is one of the precious metals used all over the world. It is used in various ways, such as in electrical and electronic equipment, as well as in jewelry. Gold is constantly depleted, so recycling is a very important process for recovering valuable materials as secondary raw materials. In this study, the residue from a jewelry waste recycling process was used. Shaking table separation and flotation as the pre-treatment before the hydrometallurgical processes were investigated. For shaking table experiments, the effects of table angle and water flow rate were investigated and a batch-type mechanical flotation was used for the flotation experiment. The results showed that for the shaking table separation, gold recoveries were high, while the purity of gold was higher, with lower recovery.

No abstract