CN202379759U - Associated equipment for preparing molybdenum trioxide through high-pressure hydrothermal method and low-temperature roasting of sodium molybdate - Google Patents
Associated equipment for preparing molybdenum trioxide through high-pressure hydrothermal method and low-temperature roasting of sodium molybdate Download PDFInfo
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- CN202379759U CN202379759U CN2011205533856U CN201120553385U CN202379759U CN 202379759 U CN202379759 U CN 202379759U CN 2011205533856 U CN2011205533856 U CN 2011205533856U CN 201120553385 U CN201120553385 U CN 201120553385U CN 202379759 U CN202379759 U CN 202379759U
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- stirrer
- molybdic oxide
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Abstract
The utility model relates to associated equipment for preparing molybdenum trioxide through a high-pressure hydrothermal method and low-temperature roasting of sodium molybdate. According to the associated equipment, a raw material conveying belt and a water pipe are arranged on the upper side of a stirrer; a sodium molybdate aqueous solution which is uniformly stirred by the stirrer is introduced into a stainless steel high-pressure hydrothermal reaction kettle through a No.1 pump; semi-aqueous molybdenum trioxide slurry obtained by the stainless steel high-pressure hydrothermal reaction kettle is introduced into a vacuum filter through a No.2 pump; the slurry is subjected to filtering separation through the vacuum filter to obtain a semi-aqueous molybdenum trioxide filter cake and a mother solution; a crystallized mother solution which is obtained by performing evaporation concentration and cooling crystallization on the mother solution in a falling film evaporator is returned to the stirrer through a No.3 pump to prepare the sodium molybdate aqueous solution; and the semi-aqueous molybdenum trioxide filter cake obtained by performing filtering separation on the slurry is conveyed into a low-temperature roasting furnace through a filter cake conveying belt at the outlet of the vacuum filter and is roasted to obtain finished molybdenum trioxide. By the associated equipment and a process associated with the equipment, the decomposition rate of a sodium molybdate solution and the purity of a molybdenum trioxide product are improved; and the associated equipment is short in process flow, simple, low in energy consumption and light in pollution and has mild conditions.
Description
Technical field
The utility model relates to a kind of support equipment for preparing molybdic oxide, particularly relates to a kind of support equipment for preparing molybdic oxide through hydrothermal method processing sodium molybdate solution and low-temperature bake Sodium orthomolybdate.
Background technology
Molybdic oxide also can directly join in the molybdenum alloy as the addition agent of molybdenum element as the main raw material of producing molybdenum-iron and molybdenum compound, improves the performance of alloy.The main technique route of producing molybdic oxide at present has acid system route and alkaline process route, all has the long problem of technical process.Like the alkaline process route, need to soak-steps such as acidifying-roasting through ammonia, this method is as known technology, and main drawback is that flow process is long, required equipment is more, the various additives expense is higher, exists necessarily and pollute.
From sodium molybdate solution directly precipitate molybdenum element, further roasting to obtain molybdic oxide be that a kind of short flow process is smelted thinking, have only acid system to be expected to realize this imagination.But in existing acid technological process; Strong acid additives such as the general sulfuric acid that adopts, hydrochloric acid are easy to make solution to become acidity fast; And under this environment; Molybdenum oxide very easily generates water-soluble inorganic acid salt, is difficult to generate solid precipitation, needs a kind of method and equipment supporting with it that directly precipitates molybdenum element from sodium molybdate solution.
Summary of the invention
The technical problem that the utility model will solve provides the support equipment that a kind of high pressure hydro-thermal and low-temperature bake Sodium orthomolybdate prepare molybdic oxide.
For solving the problems of the technologies described above, the technical scheme of the utility model is: a kind of high pressure hydro-thermal and low-temperature bake Sodium orthomolybdate prepare the support equipment of molybdic oxide, comprise stirrer, reaction kettle, filter, vaporizer and stoving oven; It is the water pipe of 15%～60% sodium molybdate aqueous solution that the top of stirrer is provided with the raw material conveying belt and the allotment concentration that add Sodium orthomolybdate and organics additive, and 1# pump inlet pipe is communicated with the discharge gate of stirrer.
Said reaction kettle is that controllable temperature is 60～225 ℃ a stainless steel high-pressure hydrothermal reaction kettle, and the drainage conduit of 1# pump is communicated with the import of stainless steel high-pressure hydrothermal reaction kettle, and the sodium molybdate aqueous solution that stirrer stirs is imported the stainless steel high-pressure hydrothermal reaction kettle.
The inlet pipe of 2 # pumps is communicated with the discharge gate of stainless steel high-pressure hydrothermal reaction kettle; Said filter is a vacuum filter; The drainage conduit of 2# pump is communicated with the inlet of vacuum filter, and the half water molybdic oxide slip that stainless steel high-pressure hydrothermal reaction kettle hydro-thermal reaction obtains is imported vacuum filter; Vacuum filter filtering separation half water molybdic oxide slip obtains half water molybdic oxide filter cake and mother liquor.
Said vaporizer is a falling film evaporator; The mother liquor vent pipe of vacuum filter is communicated with falling film evaporator; The inlet pipe of 3 # pumps is communicated with the relief outlet of falling film evaporator; The drainage conduit of 3# pump is communicated with the top of stirrer, and the mother liquor crystalline mother solution that evaporation concentration, crystallisation by cooling obtain in falling film evaporator is transported to stirrer, returns the preparation sodium molybdate aqueous solution.
Said stoving oven is that controllable temperature is 130～400 ℃ a low-temperature bake stove, and the vacuum filter outlet is provided with the filter cake conveying belt, and the half water molybdic oxide filter cake that filtering separation half water molybdic oxide slip obtains is imported the low-temperature bake stove.
The low-temperature bake outlet of still is provided with product conveyor, output molybdic oxide finished product.
In the said stainless steel high-pressure hydrothermal reaction kettle acid proof ball is housed; Be provided with at least one acid proof whisking appliance in the stainless steel high-pressure hydrothermal reaction kettle, can not be corroded during the acidic solution of the inwall of said autoclave and the ball of being adorned contact pH=3.5.
Said filter also comprises gravity filter or pressure filter.
The beneficial effect of the utility model is:
1. the utility model and high pressure hydro-thermal and low-temperature bake Sodium orthomolybdate prepare the process matching of molybdic oxide,
The method that this process using circulation is decomposed has effectively improved the rate of decomposition and the molybdic oxide product gas purity of sodium molybdate solution, and the molybdic oxide product gas purity is higher than 99.5%.
2. this technology and support equipment are compared with traditional production technique, and technological process of production weak point, mild condition, equipment is simple, energy consumption is low, pollute few.
Description of drawings
Fig. 1 prepares the system diagram of the support equipment of molybdic oxide for high pressure hydro-thermal and low-temperature bake Sodium orthomolybdate.
Embodiment
Embodiment 1:
A kind of high pressure hydro-thermal and low-temperature bake Sodium orthomolybdate prepare the support equipment of molybdic oxide, comprise stirrer, reaction kettle, filter, vaporizer and stoving oven; It is the water pipe 13 of 15%～60% sodium molybdate aqueous solution that the top of stirrer 2 is provided with the raw material conveying belt 1 and the allotment concentration that add Sodium orthomolybdate and organics additive, and 1# pump 8 inlet pipes are communicated with the discharge gate of stirrer 2; Said reaction kettle is that controllable temperature is 60～225 ℃ a stainless steel high-pressure hydrothermal reaction kettle 3; The drainage conduit of 1# pump 8 is communicated with the import of stainless steel high-pressure hydrothermal reaction kettle 3, and the sodium molybdate aqueous solution that stirrer 2 stirs is imported stainless steel high-pressure hydrothermal reaction kettle 3.
The inlet pipe of 2 # pumps 9 is communicated with the discharge gate of stainless steel high-pressure hydrothermal reaction kettle 3; Said filter is a vacuum filter 4; The drainage conduit of 2# pump 9 is communicated with the inlet of vacuum filter 4, and the half water molybdic oxide slip that stainless steel high-pressure hydrothermal reaction kettle 3 hydro-thermal reactions obtain is imported vacuum filter 4; Vacuum filter 4 filtering separation half water molybdic oxide slip obtains half water molybdic oxide filter cake 12 and mother liquor.
Said vaporizer is a falling film evaporator 10; The mother liquor vent pipe of vacuum filter 4 is communicated with falling film evaporator 10; The inlet pipe of 3 # pumps 7 is communicated with the relief outlet of falling film evaporator 10; The drainage conduit of 3# pump 9 is communicated with the top of stirrer 2, and the mother liquor crystalline mother solution that evaporation concentration, crystallisation by cooling obtain in falling film evaporator 10 is transported to stirrer 2, returns the preparation sodium molybdate aqueous solution.
Said stoving oven is that controllable temperature is 130～400 ℃ a low-temperature bake stove 5, and vacuum filter 4 outlets are provided with filter cake conveying belt 11, and the half water molybdic oxide filter cake 12 that filtering separation half water molybdic oxide slip obtains is imported low-temperature bake stoves 5.
5 outlets of low-temperature bake stove are provided with product conveyor 13, output molybdic oxide finished product.
In the said stainless steel high-pressure hydrothermal reaction kettle 3 acid proof ball is housed; Be provided with three acid proof whisking appliances in the stainless steel high-pressure hydrothermal reaction kettle 3.
Embodiment 2:Embodiment 1 said filter also comprises gravity filter or pressure filter.
Claims (4)
1. high pressure hydro-thermal and low-temperature bake Sodium orthomolybdate prepare the support equipment of molybdic oxide; Comprise stirrer, reaction kettle, filter, vaporizer and stoving oven; It is characterized in that: it is the water pipe (13) of 15%～60% sodium molybdate aqueous solution that the top of stirrer (2) is provided with the raw material conveying belt (1) and the allotment concentration that add Sodium orthomolybdate and organics additive, and 1# pump (8) inlet pipe is communicated with the discharge gate of stirrer (2); Said reaction kettle is that controllable temperature is 60～225 ℃ a stainless steel high-pressure hydrothermal reaction kettle (3); The drainage conduit of 1# pump (8) is communicated with the import of stainless steel high-pressure hydrothermal reaction kettle (3), and the sodium molybdate aqueous solution that stirrer (2) stirs is imported stainless steel high-pressure hydrothermal reaction kettle (3);
The inlet pipe of 2 # pumps (9) is communicated with the discharge gate of stainless steel high-pressure hydrothermal reaction kettle (3); Said filter is vacuum filter (4); The drainage conduit of 2# pump (9) is communicated with the inlet of vacuum filter (4), and the half water molybdic oxide slip that stainless steel high-pressure hydrothermal reaction kettle (3) hydro-thermal reaction obtains is imported vacuum filter (4); Vacuum filter (4) filtering separation half water molybdic oxide slip obtains half water molybdic oxide filter cake (12) and mother liquor;
Said vaporizer is falling film evaporator (10); The mother liquor vent pipe of vacuum filter (4) is communicated with falling film evaporator (10); The inlet pipe of 3 # pumps (7) is communicated with the relief outlet of falling film evaporator (10); The drainage conduit of 3# pump (9) is communicated with the top of stirrer (2), and the mother liquor crystalline mother solution that evaporation concentration, crystallisation by cooling obtain in falling film evaporator (10) is transported to stirrer (2), returns the preparation sodium molybdate aqueous solution;
Said stoving oven is that controllable temperature is 130～400 ℃ a low-temperature bake stove (5); Vacuum filter (4) outlet is provided with filter cake conveying belt (11), and the half water molybdic oxide filter cake (12) that filtering separation half water molybdic oxide slip obtains is imported low-temperature bake stove (5); Low-temperature bake stove (5) outlet is provided with product conveyor (13), output molybdic oxide finished product.
2. high pressure hydro-thermal according to claim 1 and low-temperature bake Sodium orthomolybdate prepare the support equipment of molybdic oxide, it is characterized in that: in the said stainless steel high-pressure hydrothermal reaction kettle (3) acid proof ball is housed.
3. high pressure hydro-thermal according to claim 1 and low-temperature bake Sodium orthomolybdate prepare the support equipment of molybdic oxide, it is characterized in that: be provided with at least one acid proof whisking appliance in the said stainless steel high-pressure hydrothermal reaction kettle (3).
4. high pressure hydro-thermal according to claim 1 and low-temperature bake Sodium orthomolybdate prepare the support equipment of molybdic oxide, it is characterized in that: said filter also comprises gravity filter or pressure filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205533856U CN202379759U (en) | 2011-12-27 | 2011-12-27 | Associated equipment for preparing molybdenum trioxide through high-pressure hydrothermal method and low-temperature roasting of sodium molybdate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205533856U CN202379759U (en) | 2011-12-27 | 2011-12-27 | Associated equipment for preparing molybdenum trioxide through high-pressure hydrothermal method and low-temperature roasting of sodium molybdate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202379759U true CN202379759U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205533856U Expired - Fee Related CN202379759U (en) | 2011-12-27 | 2011-12-27 | Associated equipment for preparing molybdenum trioxide through high-pressure hydrothermal method and low-temperature roasting of sodium molybdate |
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| Country | Link |
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| CN (1) | CN202379759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104709943A (en) * | 2015-03-13 | 2015-06-17 | 济南大学 | Preparation method of molybdenum trioxide microsphere in three-dimensional hierarchical structure |
-
2011
- 2011-12-27 CN CN2011205533856U patent/CN202379759U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104709943A (en) * | 2015-03-13 | 2015-06-17 | 济南大学 | Preparation method of molybdenum trioxide microsphere in three-dimensional hierarchical structure |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20171227 |
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| CF01 | Termination of patent right due to non-payment of annual fee |