Method for preparing sodium antimonate from antimony oxide ore via alkaline approach

[0025] This embodiment includes the following steps:

[0026] (1) Antimony oxide ore leaching: crush antimony oxide ore to -150 mesh, take -150 mesh antimony oxide ore 100g (including Sb10.15wt%, As0.15wt%, Pb1.02wt%, Fe17.02wt%), add Add 1.5g of hydrazine sulfate to 1.1L sodium hydroxide solution (NaOH concentration is 300.2g / L), leaching temperature is 82±2℃, and leaching time is 60 minutes; then filter to obtain filter residue, which weighs 82g after drying (of which Sb0.51 %, Fe20.55%), filtrate 1.0L (of which Sb9.73g / L);

[0027] (2) Purification of filtrate: Add 2.0 g of copper sulfate to the filtrate obtained in step (1), stir for 30 minutes at room temperature, and filter to obtain 1.0 L of purified liquid and purified residue; the dry weight of the obtained purified residue is 3.0 g (Sb0.04%, Cu21.23%);

[0028] (3) Oxidation of the purification solution: raise the temperature of the purification solution to 62±2°C, add 30mL of hydrogen peroxide (mass concentration:...

[0031] This embodiment includes the following steps:

[0032] (1) Antimony oxide ore leaching: crush antimony oxide ore to -150 mesh, take -150 mesh antimony oxide ore 200g (including Sb16.45%, As0.25%, Pb2.51%, Fe16.73%), add 2.5L sodium hydroxide solution (NaOH content is 383.5g / L) leaching, adding 5.9g of hydrazine hydrate, leaching temperature 87±2℃, leaching time 70 minutes, and then filtering to obtain a filter residue, the weight after drying is 150g (of which Sb0.33 %, Fe22.15%), filtrate 2.3L (of which Sb14.21g / L);

[0033] (2) Purification of filtrate: Add 8.2 g of copper chloride to the filtrate obtained in step (1), stir and purify for 35 minutes at room temperature, filter to obtain 2.3 L of purified liquid and purified slag, the dry weight of which is 4.9 g (Sb0.08% , Cu55.08%);

[0034] (3) Oxidation of the purification solution: heat up the purification solution obtained in step (2) to 72±2°C, add 118mL of hydrogen peroxide (60wt% mass concentration), oxidize...

[0037] This embodiment includes the following steps:

[0038] (1) Antimony oxide ore leaching: crush antimony oxide ore to -150 mesh, take -150 mesh antimony oxide ore 250g (including Sb13.59%, As0.35%, Pb2.68%, Fe18.79%), add Leach in 3.4L sodium hydroxide solution (NaOH concentration is 358.9g / L), add 6.8g hydrazine hydrate, leaching temperature 95±2℃, leaching time 90 minutes, then filter to obtain filter residue, weight after drying is 195g (of which Sb0.56%, Fe23.85%), filtrate 3.1L (of which Sb10.65g / L);

[0039] (2) Purification of the filtrate: add 10.2 g of copper sulfate to the filtrate obtained in step (1), purify for 45 minutes under stirring at room temperature, and filter to obtain a purified residue with a dry weight of 8.5 g (Sb0.06%, Cu35.83%) , purification solution 3.1L;

[0040](3) Oxidation of the purification solution: heat up the purification solution obtained in step (2) to 82±2°C, add 139 mL of hydrogen peroxide (mass concentration: 27.5wt%), oxidize...