Metallurgical technology with multiple closed cycles for tungsten mineral raw materials
A mineral raw material and process technology, applied in the field of tungsten smelting, can solve the problems of non-recycling, difficult continuous production, high production cost, etc., and achieve the effects of reducing energy consumption and cost, easy industrial application, and reducing processing costs
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Embodiment 1
[0104] Embodiment 1: by CaO / WO 3 Molecular ratio is 3.3, a certain scheelite (WO 3 The mass percentage content is 49.53%, the Fe mass percentage content is 0.43%) and clinker leaching residue (the main component is CaCO 3 ) and mineralizer calcium fluoride are ground and mixed to obtain the raw meal, the addition of calcium fluoride is 5.2% (mass percentage) of the dry tungsten mineral raw material amount, and the particle size of the raw meal is ≤40 μm. Then, in the roasting furnace In the air atmosphere, the clinker was obtained by roasting at 800°C for 2.0h. After the clinker is cooled to room temperature, it is ground with a vibrating mill, and the clinker particle size is ≤45 μm. Weigh 5.0g of finely ground clinker and add it to the reaction kettle with ventilation and mechanical stirring device, and add 50g-(NH 4 ) 2 CO 3 / 100g-H 2 O ammonium carbonate solution 50mL and sealed, and then into CO 2 gas, control the absolute pressure of the reaction system to 2atm, a...
Embodiment 2
[0105] Embodiment 2: by (CaO+FeO) / WO 3 Molecular ratio is 4.5, a black and white tungsten mixed ore (WO 3 The mass percent content is 63.75%, the Fe mass percent content is 5.90%) and the clinker leaching slag are ground and mixed to obtain raw meal, the raw meal particle size is ≤45μm, and then, in the shaft furnace, the weak reducing atmosphere At 950°C for 3.0 hours, clinker was obtained. After the clinker is cooled to room temperature, it is ground with a ball mill, and the particle size of the clinker is ≤45 μm. Take by weighing 20.0g clinker and join in the reaction kettle of band ventilation and mechanical stirring device, add 35g-(NH 4 ) 2 CO 3 / 100g-H 2 O ammonium carbonate solution 100mL and sealed, and then into CO 2 Gas, control the absolute pressure of the reaction system to 2atm, and react at 70°C for 4h. After the reaction, the leached pulp is vacuum filtered, and the filter cake is washed three times with pure water. The leaching rate of tungsten in cli...
Embodiment 3
[0106] Embodiment 3: press (CaO+FeO+MnO) / WO 3 Molecular ratio is 3.4, a wolframite (WO 3 The mass percentage content is 62.40%, the Fe mass percentage content is 14.08%, the Mn mass percentage content is 2.25%) and the clinker leaching residue and calcium fluoride are ground and mixed to obtain the raw meal, and the calcium fluoride The amount of addition is 7% (mass percentage) of the dry tungsten mineral raw material, and the particle size of the raw material is ≤40 μm. Then, in a tubular roaster, under a neutral atmosphere, roast at 800°C for 6.0 hours to obtain clinker, and the clinker is cooled After reaching room temperature, use a rod mill to grind finely, the clinker particle size is ≤45μm; the leaching equipment selects a ball mill leaching device with a built-in ammonium carbonate saturated solution, and adds ammonium bicarbonate according to 1.0 times the theoretical amount; put the clinker into the leaching equipment, Reaction at 80°C for 4h. After the reaction, ...
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