CN212902578U - Two segmentation roasting equipment of molybdenum concentrate - Google Patents
Two segmentation roasting equipment of molybdenum concentrate Download PDFInfo
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- CN212902578U CN212902578U CN202021414234.8U CN202021414234U CN212902578U CN 212902578 U CN212902578 U CN 212902578U CN 202021414234 U CN202021414234 U CN 202021414234U CN 212902578 U CN212902578 U CN 212902578U
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Abstract
A two-section type roasting device for molybdenum concentrate comprises a first section rotary kiln, wherein a discharge end of the first section rotary kiln is connected with a feed end of a second section rotary kiln through a feeding device, the second section rotary kiln is obliquely arranged, a kiln head is higher than a kiln tail, an air supply system is arranged on the second section rotary kiln, the air supply system comprises a first air outlet arranged at the feed end of the second section rotary kiln and a first air inlet arranged at the discharge end of the second section rotary kiln, the first air outlet and the first air inlet are communicated with an inner cavity of the second section rotary kiln, a barrel of the second section rotary kiln is provided with a heat exchange device for taking away excessive heat inside the second section rotary kiln, the molybdenum oxide is deeply oxidized by providing heat in the second section rotary kiln through the arrangement of the second section rotary kiln and providing sufficient oxygen through the air supply system, so that the solubility rate of the molybdenum oxide is improved, and the use amount of industrial sodium nitrate in the subsequent molybdenum, thereby reducing the content of nitrogen oxides in the smelting tail gas.
Description
The technical field is as follows:
the utility model belongs to the technical field of the sulphide production or the refining of metal molybdenum, a two segmentation roasting equipment of molybdenum concentrate.
Background art:
the process and the yield of the process for producing molybdenum oxide by using the carbon-free roasting rotary kiln adopted in China at present are relatively stable, but in the finished product molybdenum oxide produced by roasting molybdenum concentrate by using the single-stage rotary kiln, the molybdenum trioxide accounts for about 55-60%, and the lower molybdenum oxide dissolubility has great influence on the subsequent ferromolybdenum smelting.
According to the actual experience of molybdenum roasting, the main reason of low solubility of molybdenum oxide is insufficient reaction time and temperature in the deep oxidation stage of molybdenum concentrate. According to the current single-stage rotary kiln roasting process, if the proportion of soluble molybdenum components in the finished molybdenum oxide is improved, the existing device is difficult to realize.
Because of the great environmental protection pressure and the stricter and stricter emission standard of nitrogen oxides at present, the content of soluble molybdenum in finished molybdenum oxide is urgently needed to be improved in the ferromolybdenum smelting process so as to reduce the use amount of industrial sodium nitrate until the use amount of industrial sodium nitrate is eliminated, and further reduce the content of nitrogen oxides in smelting tail gas, and therefore, research projects for improving the roasting of soluble molybdenum are urgent.
The utility model has the following contents:
in order to overcome the defects, the utility model provides a two-stage roasting device for molybdenum concentrate.
The utility model provides a technical scheme that its technical problem adopted:
the utility model provides a two segmentation calcination devices in molybdenum concentrate, includes one section rotary kiln, the discharge end of one section rotary kiln passes through material feeding unit and is connected with the feed end of two-stage section rotary kiln, the slope of two-stage section rotary kiln sets up, and the kiln head is higher than the kiln tail, be equipped with the air feed system on the two-stage section rotary kiln, the air feed system is including setting up the first air outlet at two-stage section rotary kiln feed end and setting up the first air intake at two-stage section rotary kiln discharge end, first air outlet and first air intake and the inner chamber intercommunication of two-stage section rotary kiln, the barrel of two-stage section rotary kiln is equipped with heat exchange device for take away the inside too much heat of two-stage section rotary kiln, still be equipped with electric heater unit on the barrel lateral wall of two.
And a plurality of lifting plates are arranged on the side wall of the inner cavity of the two-section rotary kiln.
And the side wall of the cylinder body of the two-section rotary kiln is also provided with a heat-insulating layer.
The feeding device comprises a discharge box connected with the discharge end of the first-section rotary kiln, the tail end of the discharge box is connected with one end of a gravity flap valve, the other end of the gravity flap valve is connected with a feeding screw through a pipeline, and the discharge end of the feeding screw is connected with the feed inlet of the second-section rotary kiln through a feeding chute.
And a vibrator is also arranged on the second-stage rotary kiln.
The heat exchange device comprises a second air outlet arranged at the front end of the cylinder, a first air outlet arranged at the tail end of the cylinder, and an air channel which is positioned in the inner wall of the cylinder and is connected with the second air outlet and the first air outlet.
The air supply system, the heat exchange device, the temperature sensor and the electric heating device are all electrically connected with the controller.
Due to the adoption of the technical scheme, the utility model discloses have following superiority:
the utility model provides a pair of two segmentation roasting equipment of molybdenum concentrate is through setting up the two-stage rotary kiln to provide the heat through the electrical heating in the two-stage rotary kiln, and provide the oxygen of capacity through the air feed system, make molybdenum oxide degree of depth oxidation, thereby improve molybdenum oxide's soluble rate, with the reduction until the cancellation at the use amount of follow-up ferromolybdenum smelting in-process industry sodium nitrate, thereby reduce the content of nitrogen oxide in the smelting tail gas.
Description of the drawings:
fig. 1 is a side view of the present invention;
fig. 2 is a top view of the present invention;
in the figure: 1. a first section of rotary kiln; 2. a second-stage rotary kiln; 3. a discharging box; 4. a gravity flap valve; 5. a feed screw; 6. a feeding chute; 71. a first air outlet; 72. a first air inlet; 8. a material raising plate; 91. a second air outlet; 92. a second air inlet; 10. an electric heating device; 11. a breaker; 12. a rapping device.
The specific implementation mode is as follows:
the present invention will be explained in more detail by the following examples, which are intended to protect all the changes and improvements within the scope of the present invention, and are not limited to the following examples;
the two-section type molybdenum concentrate roasting device comprises a section of rotary kiln 1, wherein the section of rotary kiln 1 belongs to a self-heating type rotary kiln, the discharge end of the section of rotary kiln 1 is connected with the feed end of a section of rotary kiln 2 through a feeding device, the feeding device comprises a discharge box 3 connected with the discharge end of the section of rotary kiln, a scattering machine 11 is arranged inside the discharge box 3, the tail end of the discharge box 3 is connected with one end of a gravity flap valve 4, the other end of the gravity flap valve 4 is connected with a feeding screw 5 through a pipeline, and the discharge end of the feeding screw 5 is connected with the feed inlet of the section of rotary kiln 2 through a feeding chute 6.
Two-stage segment rotary kiln 2 belongs to the electrical heating rotary kiln, 2 slopes of two-stage segment rotary kiln set up, and the kiln head is higher than the kiln tail, the ejection of compact of being convenient for, simultaneously, be equipped with a plurality of lifting blades 8 on the inner chamber lateral wall of two-stage segment rotary kiln 2, lifting blades 8 are not parallel with the axis of two-stage segment rotary kiln 2, make two-stage segment rotary kiln 2 when rotatory, the material can be through 8 easier removals to the kiln tail of lifting blades, lifting blades 8 play the effect that the poplar spills to the material in addition, can further make material and oxygen fully contact, but improve the capacity rate of molybdenum oxide product.
And the air supply system is arranged on the second-stage rotary kiln and comprises a first air outlet arranged at the feeding end of the second-stage rotary kiln and a first air inlet arranged at the discharging end of the second-stage rotary kiln, the first air outlet and the first air inlet are communicated with an inner cavity of the second-stage rotary kiln, and the air supply system provides sufficient oxygen for the inner cavity to deeply oxidize molybdenum oxide, so that the solubility of molybdenum oxide is improved.
The barrel of two-stage rotary kiln is equipped with heat exchange device, heat exchange device is including setting up the second air outlet and the first air outlet of setting at the barrel end at the barrel front end to and be located the barrel inner wall, connect the wind channel of second air outlet and first air outlet, be used for taking away the inside too much heat of two-stage rotary kiln 2, still be equipped with electric heater unit 10 on the barrel lateral wall of two-stage rotary kiln, still be equipped with a plurality of temperature sensor in the inner chamber of two-stage rotary kiln 2.
The air supply system, the heat exchange device, the temperature sensor and the electric heating device are all electrically connected with the controller, and the model of the specific sensor can be selected according to the temperature range in specific implementation, belongs to the prior art and is not described too much.
When the temperature in the second-stage rotary kiln 2 is low, the temperature sensor transmits a signal to the controller, the controller starts the electric heating device 10, and the heating source of the electric heating device 10 is an electric heating wire, so that enough heat is supplemented; when the temperature of the rotary kiln is too high due to the exothermic reaction of the materials, the temperature sensor transmits the temperature to the controller, and the controller adjusts the external heat exchange device, so that redundant heat is taken away.
And the side wall of the cylinder body of the two-section rotary kiln 2 is also provided with a heat insulation layer for further insulating the inner cavity.
And a vibrator 12 is also arranged on the second-stage rotary kiln to ensure that the materials are not adhered to the side wall of the inner cavity.
Through the utility model, the dissolubility rate of the molybdenum oxide product can be improved to more than 80 percent from about 60 percent.
The details of the above are not described in detail since they are prior art.
Claims (7)
1. A two segmentation roasting equipment of molybdenum concentrate, its characterized in that: the device comprises a first section of rotary kiln, the discharge end of the first section of rotary kiln is connected with the feed end of a second section of rotary kiln through a feeding device, the second section of rotary kiln is inclined and arranged, the head of the kiln is higher than the tail of the kiln, an air supply system is arranged on the second section of rotary kiln, the air supply system comprises a first air outlet arranged at the feed end of the second section of rotary kiln and a first air inlet arranged at the discharge end of the second section of rotary kiln, the first air outlet and the first air inlet are communicated with the inner cavity of the second section of rotary kiln, a heat exchange device is arranged on a barrel body of the second section of rotary kiln and used for taking away excessive heat inside the second section of rotary kiln, an electric heating device is further arranged on the barrel.
2. The two-stage roasting device for molybdenum concentrate according to claim 1, characterized in that: and a plurality of lifting plates are arranged on the side wall of the inner cavity of the two-section rotary kiln.
3. The two-stage roasting device for molybdenum concentrate according to claim 1, characterized in that: and the side wall of the cylinder body of the two-section rotary kiln is also provided with a heat-insulating layer.
4. The two-stage roasting device for molybdenum concentrate according to claim 1, characterized in that: and a vibrator is also arranged on the second-stage rotary kiln.
5. The two-stage roasting device for molybdenum concentrate according to claim 1, characterized in that: the feeding device comprises a discharge box connected with the discharge end of the first-section rotary kiln, the tail end of the discharge box is connected with one end of a gravity flap valve, the other end of the gravity flap valve is connected with a feeding screw through a pipeline, and the discharge end of the feeding screw is connected with the feed inlet of the second-section rotary kiln through a feeding chute.
6. The two-stage roasting device for molybdenum concentrate according to claim 1, characterized in that: the heat exchange device comprises a second air outlet arranged at the front end of the cylinder, a first air outlet arranged at the tail end of the cylinder, and an air channel which is positioned in the inner wall of the cylinder and is connected with the second air outlet and the first air outlet.
7. The two-stage roasting device for molybdenum concentrate according to claim 1, characterized in that: the air supply system, the heat exchange device, the temperature sensor and the electric heating device are all electrically connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021414234.8U CN212902578U (en) | 2020-07-17 | 2020-07-17 | Two segmentation roasting equipment of molybdenum concentrate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021414234.8U CN212902578U (en) | 2020-07-17 | 2020-07-17 | Two segmentation roasting equipment of molybdenum concentrate |
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| CN212902578U true CN212902578U (en) | 2021-04-06 |
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| CN202021414234.8U Active CN212902578U (en) | 2020-07-17 | 2020-07-17 | Two segmentation roasting equipment of molybdenum concentrate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116003107A (en) * | 2022-12-27 | 2023-04-25 | 武汉钢铁集团耐火材料有限责任公司 | Method and equipment for reducing electric smelting magnesia particles of regenerated magnesia carbon bricks |
-
2020
- 2020-07-17 CN CN202021414234.8U patent/CN212902578U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116003107A (en) * | 2022-12-27 | 2023-04-25 | 武汉钢铁集团耐火材料有限责任公司 | Method and equipment for reducing electric smelting magnesia particles of regenerated magnesia carbon bricks |
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