Celestine dressing: lapis lazuli production is not to get a high grade concentrate for the purpose. Most of the world's lapis lazuli resource-owning countries have integrated the production of primary products (raw ore) with strontium- containing compounds (salt salts such as SrCo3). This determines the production of lapis lazuli and its strontium salt, including the two parts of mineral processing and strontium salt production and processing technology.
(1) Dressing method Re-election is the most commonly used method in lapis lazuli dressing. The most common structural process is the process of jigging-shaker. Jigging is used to process coarse materials and shakers are used to process fine grade materials. This process structure is adopted in the celestite re-election of the Xiangyang Aijingshan antimony ore plant in Jiangsu, China. Figure 3.21.7 Flow chart of the principle of ore dressing test in Aijingshan Mine
The principle course of the ore dressing test of the mine is shown in Figure 3.21.7. After the ore is crushed and crushed to less than 12mm, the granules of each group larger than 1mm are separately jigging, and each fine fraction of less than 1mm is separately selected by shaker. . The comprehensive index of re-election is: concentrate yield is 45.38%, concentrate grade (SrSo4) is 86.12%, and recovery rate is 83.31%. The middle mines of the jigging and shaker can be recovered by three methods such as magnetic separation, re-election and flotation after crushing and grinding, but the index of the flotation scheme is the best. Note that in the flotation sludge and dispersion suppressing limonite ore with Na2CO3 and Na2SiO3 after slurried, pH is preferably controlled at between 8 to 9.5, when using oleic acid as collector, the slurry temperature greater than 25 ° C. In addition, the structure of the flotation process has a greater impact on product quality. When the flotation feed is taken as 100%, the yield of flotation concentrate is 44.50%, and the concentrate grade (SrSO4) is 86.04%. 95.68%.
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