CN110697772B - Method for removing trace antimony oxide in crude bismuth oxide - Google Patents
Method for removing trace antimony oxide in crude bismuth oxide Download PDFInfo
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- CN110697772B CN110697772B CN201910962172.XA CN201910962172A CN110697772B CN 110697772 B CN110697772 B CN 110697772B CN 201910962172 A CN201910962172 A CN 201910962172A CN 110697772 B CN110697772 B CN 110697772B
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- bismuth oxide
- oxide
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- crude bismuth
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G29/00—Compounds of bismuth
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
Abstract
The invention discloses a method for removing trace antimony oxide from crude bismuth oxide, which comprises the steps of reacting the crude bismuth oxide with water or dilute alkali solution, filtering and washing to obtain impurity-removed bismuth oxide.
Description
Technical Field
The invention relates to a method for purifying crude bismuth oxide, in particular to a method for removing trace antimony oxide in crude bismuth oxide, and belongs to the technical field of bismuth oxide production.
Background
In the prior art, crude bismuth oxide is produced by a pyrogenic process, and a small amount of Sb is contained due to pollution of raw materials or processes2O3And other impurities are extremely low, the traditional method needs to enter a bismuth smelting process to remove antimony again, the process flow is long, and the raw material loss is large.
Disclosure of Invention
Aiming at the defects of the method for purifying crude bismuth oxide in the prior art, the invention aims to provide the method for deeply removing trace residual antimony oxide in bismuth oxide by water or dilute alkali with high selectivity, the method has short process flow, and single impurity element Sb (phase existing form Sb)2O3) The method has the advantages of strong pertinence, less auxiliary material consumption, low energy consumption and the like, and the purified bismuth oxide can be directly used as a raw material for preparing a bismuth compound.
In order to realize the technical purpose, the invention provides a method for removing trace antimony oxide in crude bismuth oxide.
In a preferred embodiment, the purity of bismuth oxide in the crude bismuth oxide is > 98%, mainlyThe impurity is Sb2O3，Sb2O3The content of the impurities is 0.05-1% by mass, and the content of other impurities is less than 10 ppm. The method of the invention is used for treating Sb in crude bismuth oxide2O3High adaptability and pertinence, Sb2O3The content of impurities has little influence on the purification effect of the bismuth oxide.
In a preferred scheme, the dilute alkali solution is a sodium hydroxide solution with the mass percentage concentration of 0.1-0.5%.
In a preferable scheme, the mass ratio of the reaction solid to the liquid of the crude bismuth oxide to the water or the dilute alkali solution is 1: 5-15. Most preferably 1: 10.
In the preferable scheme, the reaction temperature is 20-95 ℃, and the reaction time is 2-3 h. The most preferable reaction temperature is 80-90 ℃.
In the technical scheme of the invention, Sb in crude bismuth oxide2O3When the content is too high, the impurity removal process can be repeated for many times.
The invention can selectively dissolve the antimony oxide in the crude bismuth oxide by adopting pure water or dilute alkali under proper temperature conditions. Particularly, under the condition of proper temperature, the antimony oxide can be selectively dissolved in low-concentration alkali liquor or water, the small-particle-size bismuth oxide realizes phase inversion and particle enlargement under the alkaline condition, coarse crystalline bismuth oxide particles are obtained, the antimony oxide can be conveniently removed, the bismuth oxide particles are prevented from passing through and filtering due to undersize of the bismuth oxide particles, subsequent washing and separation are facilitated, high-purity bismuth oxide can be obtained, and the loss of bismuth oxide in the purification process of the coarse bismuth oxide is reduced.
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
the technical scheme of the invention uses pure water or dilute alkali to remove trace antimony oxide in crude bismuth oxide, so that impurity antimony oxide is selectively converted into soluble compounds, thereby achieving the separation of impurity antimony and bismuth oxide, and the content of antimony can be reduced to below 0.001%.
According to the technical scheme, the bismuth oxide crystal form conversion and growth are realized simultaneously in the impurity removal process of the crude bismuth oxide, and the loss of the bismuth oxide in the operation process is reduced.
The technical scheme of the invention has short process flow, and the process from crude bismuth oxide to high-purity bismuth oxide is completed in one step, so that the method has the advantages of economy, environmental protection, less consumption of auxiliary materials, low energy consumption and the like, and the purified bismuth oxide can be directly used for preparing raw materials of bismuth compounds.
Drawings
FIG. 1 is SEM images of crude bismuth oxide before and after purification in example 1;
FIG. 2 is SEM images of crude bismuth oxide of example 2 before and after purification.
Detailed Description
The following examples are intended to illustrate the present disclosure in further detail in conjunction with the drawings attached to the specification, and the present disclosure is not limited to the examples.
Example 1
Crude bismuth oxide (not less than 99.0%) and Sb2O3: 0.064%, and other impurities (such as Zn, Ca, Pb, Cu, and the like) less than 10ppm, wherein at the temperature of 90 ℃, the ratio of crude bismuth oxide: water was stirred for 2h 1:10, filtered 1 time, and Sb was reduced to 0.019%, and the above procedure was repeated, and Sb was reduced to 0.001%.
Example 2
Crude bismuth oxide (not less than 99.0%) and Sb2O3: 0.96% and less than 10ppm of other impurities (Zn, Ca, Pb, Cu, etc.), wherein at a temperature of 80 ℃, the ratio of crude bismuth oxide: alkali liquor (sodium hydroxide concentration 0.5%): 0.0008%, Na: 0.0007 percent.
Claims (2)
1. A method for removing trace antimony oxide in crude bismuth oxide is characterized by comprising the following steps: reacting the crude bismuth oxide with water or a dilute alkali solution, filtering, and washing with water to obtain impurity-removed bismuth oxide; wherein the reaction temperature is 80-90 ℃, and the reaction time is 2-3 h; the dilute alkali solution is a sodium hydroxide solution with the mass percentage concentration of 0.1-0.5%; the mass ratio of the reaction solid to the liquid of the crude bismuth oxide to the water or the dilute alkali solution is 1: 5-15.
2. A stripper as defined in claim 1The method for removing trace antimony oxide in crude bismuth oxide is characterized by comprising the following steps: the main impurity of the crude bismuth oxide is Sb2O3，Sb2O3The content of (B) is 0.05-1% by mass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910962172.XA CN110697772B (en) | 2019-10-11 | 2019-10-11 | Method for removing trace antimony oxide in crude bismuth oxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910962172.XA CN110697772B (en) | 2019-10-11 | 2019-10-11 | Method for removing trace antimony oxide in crude bismuth oxide |
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| Publication Number | Publication Date |
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| CN110697772A CN110697772A (en) | 2020-01-17 |
| CN110697772B true CN110697772B (en) | 2022-04-12 |
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| CN201910962172.XA Active CN110697772B (en) | 2019-10-11 | 2019-10-11 | Method for removing trace antimony oxide in crude bismuth oxide |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1349041A (en) * | 1971-12-30 | 1974-03-27 | Occidental Petroleum Corp | Hydro metallurgical preparation of the oxides of antimony and antimonic acid |
| CN1955325A (en) * | 2006-09-26 | 2007-05-02 | 郴州市三和有色金属有限公司 | Impurity removing refining process of high pure bismuth |
| CN102534257A (en) * | 2012-02-15 | 2012-07-04 | 四会市鸿明贵金属有限公司 | Novel bismuth smelting separation method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3933057A1 (en) * | 2014-01-31 | 2022-01-05 | Goldcorp Inc. | A process for separation of antimony and arsenic from leach solution |
| AU2015240414B2 (en) * | 2014-03-30 | 2019-05-02 | Alchemides Pty Ltd | Purification of copper concentrate by removal of arsenic and antimony with concomitant regeneration and recycle of lixiviant |
-
2019
- 2019-10-11 CN CN201910962172.XA patent/CN110697772B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1349041A (en) * | 1971-12-30 | 1974-03-27 | Occidental Petroleum Corp | Hydro metallurgical preparation of the oxides of antimony and antimonic acid |
| CN1955325A (en) * | 2006-09-26 | 2007-05-02 | 郴州市三和有色金属有限公司 | Impurity removing refining process of high pure bismuth |
| CN102534257A (en) * | 2012-02-15 | 2012-07-04 | 四会市鸿明贵金属有限公司 | Novel bismuth smelting separation method |
Non-Patent Citations (3)
| Title |
|---|
| "提高精铋质量的生产实践";李春旺;《有色金属》;19980131(第1期);9-11，19 * |
| 李春旺."提高精铋质量的生产实践".《有色金属》.1998,(第1期), * |
| 铋渣冶炼回收铋的新工艺研究;黄建勇等;《湖南有色金属》;20180815(第04期);全文 * |
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