CN1089237A - A kind of sinter process of directly producing white vanadium - Google Patents
A kind of sinter process of directly producing white vanadium Download PDFInfo
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- CN1089237A CN1089237A CN 92106861 CN92106861A CN1089237A CN 1089237 A CN1089237 A CN 1089237A CN 92106861 CN92106861 CN 92106861 CN 92106861 A CN92106861 A CN 92106861A CN 1089237 A CN1089237 A CN 1089237A
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Abstract
A kind of sinter process of directly producing white vanadium, characteristics are to adopt unslaked lime to replace conventional sodium agent to carry out roasting together, leach through solution then, and the carbide of calcium that is incorporated as grog weight 5-15% in leaching liquid precipitates, promptly directly make thick white vanadium, thick white vanadium gets the smart vanadium of sheet through the calcination of high temperature anoxybiotic.The present invention has shortened technical process greatly, has reduced the raw material consumption, thereby has reduced product cost significantly, improved product competitiveness, the transformation efficiency of vanadium improves 10-20% simultaneously, the also corresponding raising of product grade, and solved existing in prior technology " three wastes " pollution basically.
Description
The invention provides a kind of sinter process of from navajoite stone, directly producing white vanadium.
White vanadium (being Vanadium Pentoxide in FLAKES V205) is a kind of important chemical material, the method of producing white vanadium at present generally all is with addition of an amount of sodium agent such as yellow soda ash, sodium-chlor etc., then in rotary kiln in 700-800 ℃ of high-temperature roasting, grog after the roasting makes thick red vanadium through acidity leaching, post precipitation, thick red vanadium obtains white vanadium through ammonium chloride leaching technology, carry out continuous burning of the logical oxygen of high temperature again, obtain the smart vanadium (golden yellow) of the powdery of vanadiumcontent about 98%, this powdery vanadium needs just can obtain the sheet vanadium through the calcination of high temperature anoxybiotic again.The main drawback of this technology is the transformation efficiency of vanadium low (generally about 45-50%), need in the production with a large amount of sodium agent, ammonium chloride and hydrochloric acid, the production cost height, benefit is low, especially thick vanadium treating process is longer, and produce in the treating process a large amount of " three wastes ", serious environment pollution jeopardizes the human health and the eubiosis.Therefore, existing navajoite source mill has quite a few to be forced to stop production.
The novel roasting process that the purpose of this invention is to provide the white vanadium of a kind of direct extraction, grog after the roasting is the refining white vanadium of sheet that promptly obtains of high temperature after leaching, thereby shortened process reduces cost and reduces " three wastes " and pollute, to overcome the deficiencies in the prior art.
Technical solution of the present invention is: navajoite stone, coal (or bone coal), unslaked lime three are pulverized and mixing by a certain percentage, carry out roasting after the balling-up, navajoite, coal, unslaked lime three ratio are 1: 0.65-0.85: 0.1-0.25, maturing temperature 500-800 ℃, roasting time 1-2 hour, constant temperature made navajoite main component vanadous oxide (V203) be converted into vanadic acid calcium Ca(VO through roasting about 2 hours then
3)
2Grog after the roasting is pulverized the back and use water extraction, and adds an amount of carbide of calcium and promptly obtain thick white vanadium (powdery), and thick white vanadium only need be removed impurity and promptly be obtained higher-grade sheet essence vanadium (grade can reach 99.9%) through the high temperature anoxybiotic calcination about 1000 ℃
Below the present invention is described in further detail.
1, get the raw materials ready: navajoite stone contain under the 1-1.2%(weight with) vanadous oxide, coal helps internal combustion, fuel value is about the 1500-2000 card, unslaked lime provides reaction required calcium oxide (CaO), three's proportioning is a navajoite: coal: unslaked lime=1: 0.65-0.85: 0.1-0.25, by 70-120 order net, mix after three kinds of raw material pulverizing;
2, mechanical balling-up: above-mentioned getting the raw materials ready adds suitable quantity of water balling-up in shaper, and sphere diameter is between the 5-15 millimeter;
3, roasting: above-mentioned raw material ball carries out roasting in flat kiln or shaft kiln, maturing temperature 500-800 ℃, burns that constant temperature made navajoite major ingredient vanadous oxide be converted into vanadic acid calcium Ca(VO about 2 hours after 1-2 hour
3)
2, transformation efficiency is between 70-90%;
4, leaching: it is 1 that water extraction, solid-to-liquid ratio are used in the pulverizing of the grog after roasting back: 1-2.Advance grog when earlier water inlet is warming up to 70-100 ℃, stir on charging limit, limit, stops to stir when temperature rises to 90-110 ℃, slowly adds the 5-15%(agglomerate ratio) carbide of calcium precipitate.Remove waste residue and water, extract white Vanadium Pentoxide in FLAKES (being enriched on the liquid level), drying gets the thick white vanadium of powdery, and transformation efficiency is about 50-70%;
5, refining: the thick white vanadium of powdery is removed impurity under the high temperature anoxic condition about 1000 ℃, promptly obtain the thick vanadium of sheet, grade can reach 99.9%.
Technology of the present invention is raw materials used few, technical process is short, thereby greatly reduce production cost, increased the competitiveness of product in market, the transformation efficiency of vanadium improves about 10-20% than prior art simultaneously, product grade also has corresponding raising, especially use unslaked lime (calcium oxide) to replace conventional sodium agent, hydrochloric acid and ammonium chloride, not only greatly reduce product cost, and shortened the treating process of thick vanadium greatly, the thick vanadium that leaching obtains only needs once to make with extra care and just can directly obtain high-grade sheet vanadium, has solved " three wastes " that exist in the prior art simultaneously basically and has polluted.Therefore, the present invention is the sinter process that a kind of comparatively ideal directly extracts white vanadium.
Embodiment: get navajoite stone 200 grams, bone coal 150 grams, unslaked lime 37 grams, pulverize 100 order nets, mixed evenly, added suitable quantity of water balling-up in shaper again, getting sphere diameter is the raw material ball of 8-12mm, put into crucible and put into the electric furnace roasting, 750 ℃ of maturing temperatures, roasting 90 minutes, constant temperature took out after 2 hours then, and the transformation efficiency of vanadium is converted into Vanadium Pentoxide in FLAKES for the 78%(vanadous oxide).The grog ball is pulverized, added clear water in beaker, add chamotte powder 381 grams when being warmed up to 100 ℃ with 1: 1.5 solid-to-liquid ratio, stir while feeding in raw material, temperature recovery to 102 ℃ after 7 minutes stops to stir, slowly add carbide of calcium 4.5 grams, after 5 minutes, leaching liquid begins clarification, white vanadium enrichment is to the water surface, collect white vanadium, dry slightly white vanadium, the vanadium transformation efficiency is about 62%, thick white vanadium is again through the calcination of 1000 ℃ of high temperature anoxybiotics, refining 99.5% sheet vanadium.
Claims (5)
1, a kind of sinter process of directly producing white vanadium, comprise the roasting under high temperature of navajoite stone, coal and pharmacy response, the roasting grog is through solution leaching, the refining product that promptly makes, the invention is characterized in that the medicament in the roasting process is a unslaked lime, and the carbide of calcium that is incorporated as grog weight 5-15% in leaching liquid precipitates, dries and promptly directly make the thick white vanadium of powdery, and thick vanadium promptly get sheet essence vanadium through the calcination of high temperature anoxybiotic.
2, sinter process according to claim 1, the ratio that it is characterized in that roasting process navajoite stone, coal unslaked lime three is 1: 0.65-0.85: 0.1-0.25.
3, sinter process according to claim 1 is characterized in that maturing temperature is 500-800 ℃, and roasting time is a constant temperature 2 hours after 1-2 hour.
4, sinter process according to claim 1 is characterized in that the leaching process solid-to-liquid ratio is 1: 1-2.
5,, it is characterized in that used coal is a bone coal according to the described sinter process of one of claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106861 CN1089237A (en) | 1992-03-23 | 1992-03-23 | A kind of sinter process of directly producing white vanadium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106861 CN1089237A (en) | 1992-03-23 | 1992-03-23 | A kind of sinter process of directly producing white vanadium |
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| Publication Number | Publication Date |
|---|---|
| CN1089237A true CN1089237A (en) | 1994-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106861 Pending CN1089237A (en) | 1992-03-23 | 1992-03-23 | A kind of sinter process of directly producing white vanadium |
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| CN (1) | CN1089237A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074050C (en) * | 1999-06-12 | 2001-10-31 | 湖南省安化县碳化硅厂 | Pretreatment method for extracting vanadium pentoxide from vanadium-contained ore |
| CN100359025C (en) * | 2005-08-12 | 2008-01-02 | 岳阳市中湘实业有限公司 | Method of extracting vanadium pentoxide from vanadium ore |
-
1992
- 1992-03-23 CN CN 92106861 patent/CN1089237A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074050C (en) * | 1999-06-12 | 2001-10-31 | 湖南省安化县碳化硅厂 | Pretreatment method for extracting vanadium pentoxide from vanadium-contained ore |
| CN100359025C (en) * | 2005-08-12 | 2008-01-02 | 岳阳市中湘实业有限公司 | Method of extracting vanadium pentoxide from vanadium ore |
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