A method for synergistically extracting potassium and rubidium from potassium-containing rocks
A potassium rock and ore technology, applied in the field of mineral processing and hydrometallurgy, can solve the problems of poor economic benefits, low added value, and single product, and achieve the effect of less equipment, less impurities, and easy technology
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Embodiment 1
[0064] The embodiment uses potassium-containing shale and analytically pure CaO as raw materials. Among them, the potassium-bearing rock samples come from the potassium-bearing sand shale mining area in Pingshun area, Changzhi City, Shanxi Province, and the analytically pure CaO contains 98% CaO. The chemical analysis results of the ore are shown in Table 1.
[0065] Table 1 Main components and content (%) of potassium-bearing rock ores
[0066] component SiO 2
K 2 O
CaO Na 2 O
TFe Al 2 O 3
MgO TiO 2
Rb 2 O
content% 66.26 10.48 1.44 0.081 1.78 14.01 1.12 0.48 0.022
[0067] Specific steps include:
[0068] Step 1: crush 500 grams of potassium-containing rock, add 400 ml of water, grind in a ball mill for 15 minutes, filter, and dry to obtain a potassium-containing rock sample that has passed a 200-mesh sieve;
[0069] Step 2: Take 50 grams of potassium-containing rock sample, add 70 grams of alkaline ad...
Embodiment 2
[0074] Example 2: Influence of molten salt thermal activation temperature on potassium activation rate and rubidium leaching rate
[0075] The steps of the method described in Example 1 were adopted, but the reaction temperatures for thermal activation of molten salt in step 2 were adjusted to be 160°C, 200°C, 240°C, 260°C and 280°C respectively, and experiments were carried out at different reaction temperatures. The results are shown in figure 2 .
[0076] from figure 2 It can be seen that with the increase of temperature, the effective potassium activation rate and the rubidium leaching rate both increase gradually. The higher the temperature, the more intense the reaction. At 260 °C, the effective potassium activation rate was 91%, and the rubidium leaching rate was 42%. The activation rate growth then slowed down. Excessive temperature requires high equipment material and high energy consumption. Taking into account comprehensively, the optimal temperature is chosen...
Embodiment 3
[0077] Example 3: Influence of molten salt thermal activation reaction time on potassium activation rate and rubidium leaching rate
[0078] Using the steps of the method described in Example 1, the reaction temperature of the thermal activation of molten salt is set to be 260 ° C, but the reaction times of thermal activation of molten salt in the adjustment step 2 are respectively 1h, 2h, 3h, 4h, 5h and 6h. Experiments were carried out at different reaction times, and the results are shown in image 3 .
[0079] from image 3 It can be seen that the effective potassium activation rate and the rubidium leaching rate increase with the increase of time, and remain basically unchanged after 4 hours with the extension of the reaction time. The phase of the hydrothermal system is complex. In order to save costs, reduce energy consumption, and avoid side reactions, the time should not be too long, and the optimal reaction time is 4h.
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