Method for deeply purifying sodium stannate liquor
A deep purification, sodium stannate technology, applied in chemical instruments and methods, tin compounds, inorganic chemistry, etc., to achieve the effect of improving chemical activity
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Embodiment 1
[0047] Firstly, 5 g of CaO was placed in a ball milling jar for ball milling activation, so that the average particle size of CaO reached 0.5 μm. After that, weigh 120g tin electrolytic anode slime (Sn 81%, Pb 0.8%, As 0.1%) and 70g NaOH, 20gNaNO 3 and 5g of ball-milled activated CaO were mixed, and the ball-milled activation was continued for 3 minutes. Afterwards, 20ml of distilled water was mixed with the above mixture and stirred evenly. The homogeneously mixed material was matured at 250°C for 10 minutes. After the aging, add 50ml of distilled water to stir the aging material evenly, then raise the temperature of the material to 800°C and keep it warm for 60min. After the reaction, the material was immersed in distilled water at a temperature of 60° C. for 30 minutes at a liquid-solid ratio (volume (ml) / mass (g)) of 4:1. After the water immersion reaction is finished, liquid-solid separation is carried out, and the obtained solution is evaporated, concentrated and crys...
Embodiment 2
[0049] Firstly, 20g of BaO and 30g of MgO are placed in a ball milling jar for ball milling activation, so that the average particle size reaches 0.3 μm. After that, weigh 1000g crude tin (Sn 98%, Pb 1.4%, As 0.2%) and 600g NaOH, 180gNaNO 3 Mix with impurity remover (20gBaO and 30g MgO) after ball milling activation, and continue ball milling activation for 10min. Afterwards, 200ml of sodium stannate crystallization mother liquor (Sn85g / L, As0.08g / L, Pb0.06g / L, Sb0.04g / L) was mixed with the above mixture and stirred evenly. The homogeneously mixed material was matured at 280°C for 15 minutes. After the aging, add 420ml of distilled water to stir the aging material evenly, then raise the temperature of the material to 870°C and keep it warm for 90min. After the reaction, the material was immersed in distilled water at a temperature of 50° C. for 50 minutes at a liquid-solid ratio (volume (ml) / mass (g)) of 5:1. After the water immersion reaction is finished, liquid-solid sepa...
Embodiment 3
[0051] 3g of ZnO was placed in a ball mill jar for ball milling activation, so that the average particle size of ZnO reached 0.8 μm. After that, weigh 100g tin dross (Sn 89%, Pb 0.6%, As 0.12%) and 65g NaOH, 18g NaNO 3 and 3g of ZnO activated by ball milling, and continue ball milling for 2 minutes. Afterwards, 30ml of sodium stannate crystallization mother liquor was mixed with the above-mentioned mixture and stirred evenly. The homogeneously mixed material was matured at 180°C for 5 minutes. After the aging, add 40ml of distilled water to stir the aging material evenly, then raise the temperature of the material to 600°C and keep it warm for 60min. After the reaction, the material was immersed in distilled water at a temperature of 80° C. for 30 minutes at a liquid-solid ratio (volume (ml) / mass (g)) of 6:1. After the water immersion reaction, liquid-solid separation was carried out, and the obtained solution was evaporated, concentrated and crystallized, and the crystalli...
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