CN111484077A - Method for recovering water bath black material in vanadium oxide cleaning production - Google Patents
Method for recovering water bath black material in vanadium oxide cleaning production Download PDFInfo
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- CN111484077A CN111484077A CN202010332348.6A CN202010332348A CN111484077A CN 111484077 A CN111484077 A CN 111484077A CN 202010332348 A CN202010332348 A CN 202010332348A CN 111484077 A CN111484077 A CN 111484077A
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- water bath
- black material
- vanadium oxide
- bath black
- recovering
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
- C01G31/02—Oxides
Abstract
The invention belongs to the technical field of vanadium oxide, and particularly relates to a method for recovering water bath black material in the clean production of vanadium oxide, which comprises the following steps: and after the water bath black material and the ammonium polyvanadate are uniformly mixed, returning the mixture to an ammonium polyvanadate drying and reducing production line for producing vanadium trioxide. The method of the invention is simple to operate, and does not need operations such as slurry pH control and the like; the process is short, the recovery can be completed in the process, and pulping, filter pressing and the like are not needed; the equipment failure rate is low, the continuous and stable operation can be realized, and the problems of blockage and corrosion of equipment such as pipelines and pumps caused by slurry transportation do not exist.
Description
Technical Field
The invention belongs to the technical field of vanadium oxide, and particularly relates to a method for recovering a water bath black material in the clean production of vanadium oxide.
Background
At present, the external combustion type rotary kiln is mainly adopted in industry to produce powdery vanadium trioxide, the reaction mechanism is that dried ammonium polyvanadate powdery raw material is reduced into powdery vanadium trioxide at high temperature and in a reducing atmosphere, tail gas generated in the reduction process contains dust such as low-valence vanadium oxide, ammonia gas, water vapor, reducing gas and the like, slurry is formed after treatment of a water bath device, different devices are adopted at home and abroad to carry out solid-liquid separation to obtain a recovered substance containing vanadium oxide, separated black water at the upper layer is discharged into a wastewater treatment system to be treated, and the black material at the lower layer is commonly called water bath black material due to color blackening of the recovered black material, and is a main byproduct in industrial production of vanadium trioxide. The water bath black material is melted to produce the flaky vanadium pentoxide, and because the water bath black material is sticky, has a higher melting point, has poor fluidity and is not easy to melt, the refractory material in a melting furnace is corroded and the material in the furnace is seriously burnt due to the control of the temperature of the high furnace, the overhaul period of the melting furnace is shortened by 1/3 after the black material is added, the yield of the molten vanadium is reduced by about 1.5 percent, and the service life and the production cost of equipment are directly influenced.
CN110064266A discloses a vanadium trioxide production tail gas dust removal device, and the method provides a vanadium trioxide production tail gas dust removal device with simple and convenient dust cleaning, tail gas is adopted for spraying dust removal, slurry is discharged into a sedimentation tank, upper layer water overflows to a clean water tank, black materials can be periodically grabbed out and recycled by a grab bucket, and dust removal water is recycled. The method effectively solves the problem of wastewater treatment after solid-liquid separation of the water bath slurry, but does not mention the subsequent treatment process of black material grabbing, and the method is further improved on the basis of the dust removal device.
Disclosure of Invention
The invention aims to provide a method for recovering water bath black materials in the clean production of vanadium oxide, which comprises the following steps: and after the water bath black material and the ammonium polyvanadate are uniformly mixed, returning the mixture to an ammonium polyvanadate drying and reducing production line for producing vanadium trioxide.
According to the method for recovering the water bath black material in the vanadium oxide clean production, the water content of the water bath black material is 40-50%.
According to the method for recovering the water bath black material in the vanadium oxide clean production, the water content of the ammonium polyvanadate is 18-25%.
According to the method for recovering the water bath black material in the vanadium oxide clean production, the water content of the mixed material is 25-28%.
According to the method for recovering the water bath black material in the vanadium oxide clean production, the addition amount of the water bath black material is 5-15% of the weight of ammonium polyvanadate.
According to the method for recovering the water bath black material in the vanadium oxide clean production, the addition amount of the water bath black material is 10% of the weight of the ammonium polyvanadate.
The invention has the beneficial effects that:
the method of the invention is simple to operate, and does not need operations such as slurry pH control and the like; the process is short, the recovery can be completed in the process, and pulping, filter pressing and the like are not needed; the equipment failure rate is low, the continuous and stable operation can be realized, and the problems of blockage and corrosion of equipment such as pipelines and pumps caused by slurry transportation do not exist.
Detailed Description
A method for recovering water bath black materials in the clean production of vanadium oxide comprises the following steps: and after the water bath black material and the ammonium polyvanadate are uniformly mixed, returning to an ammonium polyvanadate drying and reducing production line for producing vanadium trioxide. Wherein the water content of the water bath black material is 40-50%; the water content of the ammonium polyvanadate is 18-25%; the water content of the mixture is 25-28%.
In the method, the drying until the water content is 25-28% is to enable the mixed material to meet the quality requirement of the raw materials of the production line, and if the mixed material is too wet, the drying line is easily blocked, so that the smoothness of the production logistics is influenced.
In the method, in order to ensure that the water content of the mixture meets the requirements of a drying line, the addition amount of the water bath black material is set to be 5-15% of the weight of the ammonium polyvanadate; preferably, the addition amount of the water bath black material is 10% of the weight of the ammonium polyvanadate.
In the method, if too many materials are mixed at one time, the mixture can be baked and aired by using the waste heat of the melting furnace, so that the problem of overhigh local water content caused by uneven manual mixing can be avoided, and the water content of the mixture can be ensured to meet the requirements of a drying line.
The method of the invention is simple mixing of two solid materials, does not need to adjust pH, does not react with each other, and only physically mixes, thereby reducing the comprehensive water content of the mixture and meeting the production requirements of a drying line.
The scheme of the invention will be explained with reference to the examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The raw materials are not indicated by manufacturers, and are all conventional products which can be obtained commercially.
Example 1
Regularly snatch the water bath blackness material of sedimentation tank, put into on-the-spot stockpiling room after the waterlogging caused by excessive rainfall, natural sunning, 320 kilograms of loading bucket, sample detection moisture 43.2%, dry area falls to the ground ammonium polyvanadate 3.1t, moisture 23.6%, send the artifical homogeneous mixing of two kinds of materials above-mentioned, send the sample to detect simultaneously and synthesize moisture 26.7%, the material satisfies the raw materials quality requirement of dry production line after the mixture, after this batch of material is brought the feed bin, track batch vanadium trioxide quality and do not appear the abnormal fluctuation, satisfy next process production demand.
Example 2
The method comprises the steps of periodically grabbing the water bath black materials of a sedimentation tank, draining, putting the drained materials into a field stockpiling room, naturally airing, loading 290 kilograms of materials, sampling and detecting 40.7 percent of water content, falling to the ground in a drying area, 2.97t of ammonium polyvanadate and 22.7 percent of water content, manually and uniformly mixing the two materials, simultaneously sending a sample to detect comprehensive water content of 25.9 percent, enabling the mixed materials to meet the raw material quality requirement of a drying production line, and tracking the quality of a batch of vanadium trioxide without abnormal fluctuation after the batch of materials are brought into a storage bin to meet the production requirement of the next process.
Claims (6)
1. The method for recovering the water bath black material in the clean production of the vanadium oxide is characterized by comprising the following steps of: and after the water bath black material and the ammonium polyvanadate are uniformly mixed, returning the mixture to an ammonium polyvanadate drying and reducing production line for producing vanadium trioxide.
2. The method for recovering the water bath black material in the clean production of the vanadium oxide according to claim 1, which is characterized by comprising the following steps of: the water content of the water bath black material is 40-50%.
3. The method for recovering the water bath black material in the clean production of the vanadium oxide according to claim 1 or 2, which is characterized by comprising the following steps of: the water content of the ammonium polyvanadate is 18-25%.
4. The method for recovering the water bath black material in the clean production of vanadium oxide according to claim 3, characterized by comprising the following steps: the water content of the mixed materials is 25-28%.
5. The method for recovering the water bath black material in the clean production of the vanadium oxide according to any one of claims 1 to 4, which is characterized by comprising the following steps of: the addition amount of the water bath black material is 5-15% of the weight of the ammonium polyvanadate.
6. The method for recovering the water bath black material in the clean production of vanadium oxide according to claim 5, characterized in that: the addition amount of the water bath black material is 10 percent of the weight of the ammonium polyvanadate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010332348.6A CN111484077A (en) | 2020-04-24 | 2020-04-24 | Method for recovering water bath black material in vanadium oxide cleaning production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010332348.6A CN111484077A (en) | 2020-04-24 | 2020-04-24 | Method for recovering water bath black material in vanadium oxide cleaning production |
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| CN111484077A true CN111484077A (en) | 2020-08-04 |
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| CN202010332348.6A Pending CN111484077A (en) | 2020-04-24 | 2020-04-24 | Method for recovering water bath black material in vanadium oxide cleaning production |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470459A (en) * | 2003-06-24 | 2004-01-28 | 攀枝花钢铁有限责任公司钢铁研究院 | Vanadium sesquioxide reduced tail gas dust treating method |
| NZ587969A (en) * | 2008-11-18 | 2012-12-21 | Pangang Group Steel Va & Ti Co | Clean production method of vanadium oxide |
| CN109205673A (en) * | 2018-11-09 | 2019-01-15 | 成都先进金属材料产业技术研究院有限公司 | The method for preparing vanadium trioxide |
| CN110064266A (en) * | 2019-05-31 | 2019-07-30 | 攀钢集团钒钛资源股份有限公司 | Vanadium trioxide produces tail gas dust cleaning apparatus |
-
2020
- 2020-04-24 CN CN202010332348.6A patent/CN111484077A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470459A (en) * | 2003-06-24 | 2004-01-28 | 攀枝花钢铁有限责任公司钢铁研究院 | Vanadium sesquioxide reduced tail gas dust treating method |
| NZ587969A (en) * | 2008-11-18 | 2012-12-21 | Pangang Group Steel Va & Ti Co | Clean production method of vanadium oxide |
| CN109205673A (en) * | 2018-11-09 | 2019-01-15 | 成都先进金属材料产业技术研究院有限公司 | The method for preparing vanadium trioxide |
| CN110064266A (en) * | 2019-05-31 | 2019-07-30 | 攀钢集团钒钛资源股份有限公司 | Vanadium trioxide produces tail gas dust cleaning apparatus |
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Application publication date: 20200804 |
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| RJ01 | Rejection of invention patent application after publication |