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

A technology for preparing sodium antimonate and antimony oxide is applied in the direction of improving process efficiency, which can solve the problem of low recovery rate and achieve the effects of less environmental pollution, non-toxic and harmless waste residue, and high recovery rate

Active Publication Date: 2014-06-18
锡矿山闪星锑业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the low recovery rate existing in the prior art when treating antimony oxide ore with a grade of 10-20%, and to provide an antimony oxide ore with higher recovery rate and less pollution Alkali method prepares the method for sodium antimonate

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[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:...

Embodiment 2

[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...

Embodiment 3

[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...

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Abstract

The invention discloses a method for preparing sodium antimonate from an antimony oxide ore via an alkaline approach. The method comprises the following steps: (1) leaching the antimony oxide ore, (2) purifying filtrate, and (3) oxidizing the purified filtrate. The method is high in recovery rate, the leaching rate of antimony is 95-99%, the direct recovery rate of sodium antimonate is 90-95%, the whole process is performed under an alkaline environment, the requirement on corrosion resistance of equipment is not high, no complicated pretreatment is required in the process, the needed raw materials are nontoxic and harmless, the alkaline liquid is recyclable, neither waste water nor waste gas is generated in the process, and waste residues are nontoxic and harmless.

Description

technical field [0001] The invention relates to a method for preparing sodium antimonate, in particular to a method for preparing sodium antimonate by antimony oxide alkali method. Background technique [0002] Antimony oxide ore is a difficult ore to process. When low-grade antimony oxide ore is processed, its recovery rate is low. When the grade of 10-20% antimony oxide ore is increased to above 30% through ore dressing, the recovery rate is about 60%; therefore, the general treatment of 10-20% antimony oxide ore is often carried out by fire method . If the antimony oxide ore with a grade of 10-20% is directly smelted in a vertical shaft furnace, the volatilization rate of antimony is 50-60%; if the antimony oxide ore is finely ground to less than 2mm, it is mixed with coal to form a honeycomb-shaped artificial type Lump ore, after drying, is volatilized and smelted in a vertical shaft furnace at 900-1050 ° C, and the recovery rate is 70-80%. In the process of this metho...

Claims

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Application Information

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IPC IPC(8): C22B3/12C22B3/44C22B30/02
CPCY02P10/20
Inventor 刘鹊鸣单桃云廖光荣邓卫华戴永俊曾雁
Owner 锡矿山闪星锑业有限责任公司
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