CN214142483U - Chromite oxygen-enriched roasting equipment - Google Patents
Chromite oxygen-enriched roasting equipment Download PDFInfo
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- CN214142483U CN214142483U CN202023174289.9U CN202023174289U CN214142483U CN 214142483 U CN214142483 U CN 214142483U CN 202023174289 U CN202023174289 U CN 202023174289U CN 214142483 U CN214142483 U CN 214142483U
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Abstract
The utility model discloses a chromite oxygen boosting roasting equipment, include: the kiln body that the slope set up, its kiln head height is less than kiln tail height, and kiln body structure includes: the kiln body outer skin is arranged outside the heat insulation layer, and the rotating wheel is fixedly arranged outside the kiln body outer skin; a natural gas inlet is formed in the kiln head of the kiln body and connected with a natural gas pipeline; a feed inlet and a negative pressure induced draft device are arranged at the kiln tail of the kiln body; a plurality of groups of oxygen spray gun units are arranged on the kiln body, each group of oxygen spray gun units comprises a plurality of oxygen spray guns, the oxygen spray guns are fixed outside the kiln body in a surrounding manner through mounting mechanisms, the oxygen spray guns are connected with a buffer tank through oxygen pipelines, and the nozzle ends of the oxygen spray guns extend into the kiln body; the riding wheels are used for supporting the kiln body and are arranged on two sides of the outside of the kiln body; and a transmission device. The utility model discloses set up the oxygen spray gun on the kiln body, make the kiln body carry out the oxygen boosting calcination to the chromite, improved the oxidation rate of chromium and the utilization ratio of alkali.
Description
Technical Field
The utility model belongs to the technical field of chemical machinery equipment, more specifically say, the utility model relates to a chromite oxygen boosting roasting equipment.
Background
Chromite is a magma-acting mineral, usually produced in ultrabasic rock, symbiotic with olivine; also found in placers. Chromite appears much like magnetite, generally in the form of a lumpy or granular aggregate. In the metallurgical process, chromite is mainly used for producing ferrochrome and metallic chromium. The ferrochrome is used as an additive of steel to produce various special steels with high strength, corrosion resistance, wear resistance, high temperature resistance and oxidation resistance. The metal chromium is mainly used for smelting special alloys by cobalt, nickel, tungsten and other elements. Chromite is a shortage of ore species, with low reserves and low yields. In industry, chromite, chromium spinel, chromium rich spinel, hard chromium spinel and similar minerals are often collectively referred to as chromite. Wherein, the chromite roasting refers to roasting the furnace charge consisting of chromite, soda ash and filler at high temperature and normal pressure by air. Chromite roasting is mainly carried out in a rotary kiln. During the firing process, the charge material moves forward by the rotation of the rotary kiln.
At present, the rotary kiln introduces air roasting, and the main problems are that: the oxygen concentration is low (the oxygen concentration in most sections in the kiln is only 9 percent), so that the oxidation rate of the chromite is low, the oxidation rate is not high, in order to ensure that the oxygen is supplied to the chromite for oxidation, a large amount of excess air must be provided, the heat efficiency is reduced, the heat loss taken away by the air is greatly improved, the utilization rate of alkali is reduced, and the amount of returned slag is greatly increased.
Thus, there is a need for an apparatus that increases the chromite oxidation rate, increases the alkali utilization, and reduces the amount of slag return.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages which will be described later.
To achieve these objects and other advantages in accordance with the present invention, there is provided a chromite oxygen-rich roasting apparatus including:
the kiln body that the slope set up, its kiln head height is less than kiln tail height, kiln body structure includes:
the kiln body comprises a refractory brick layer, a kiln body outer skin and a rotary wheel, wherein a heat insulation layer is arranged outside the refractory brick layer;
the kiln head of the kiln body is provided with a natural gas inlet and a natural gas outlet, and the natural gas inlet is connected with a natural gas pipeline; a feed inlet and a negative pressure induced draft device are arranged at the kiln tail of the kiln body;
a plurality of groups of oxygen spray gun units are arranged on the kiln body, each group of oxygen spray gun units comprises a plurality of oxygen spray guns, the oxygen spray guns are fixed outside the kiln body in a surrounding manner through mounting mechanisms, the oxygen spray guns are connected with a buffer tank through oxygen pipelines, and the nozzle ends of the oxygen spray guns extend into the kiln body;
the riding wheels are used for supporting the kiln body and are arranged on two sides of the exterior of the kiln body; and the transmission device is arranged below the kiln body.
Preferably, the kiln body comprises a feeding section, a kiln body high-temperature roasting section and a discharging section, the feeding section and the kiln body high-temperature roasting section are both connected with natural gas pipelines, the temperature of the feeding section is controlled to be 400-600 ℃ through a temperature controller, the temperature of the kiln body high-temperature roasting section is controlled to be 600-800 ℃ through the temperature controller, and the temperature of the kiln body high-temperature discharging section is controlled to be 1000 ℃ through the temperature controller.
Preferably, each group of the oxygen spray gun unit is provided with 12-20 oxygen spray guns; and oxygen spray gun units are arranged outside the feeding section, the kiln body high-temperature roasting section and the discharging section.
Preferably, wherein the structure of the mounting mechanism comprises:
the two clamping rings are fixedly clamped outside the kiln body through bolts;
a plurality of mounting hole sites with external threads are arranged on the hooping ring, the oxygen spray gun is arranged in the mounting hole sites, the mounting hole sites are in threaded connection with locking nuts, and the oxygen spray gun is locked and fixed on the hooping ring through the locking nuts;
the kiln body outer skin integrated into one piece is provided with a limiting block, and the limiting block is embedded into the long groove.
Preferably, the inclination angle of the kiln body is 1-10 degrees.
Preferably, the structure of the transmission device comprises:
and the transmission motor is characterized in that a transmission gear is fixedly arranged on an output shaft, and the transmission gear is meshed with the rotating wheel.
The utility model discloses at least, include following beneficial effect: the utility model can make the chromite in the kiln body perform oxygen-enriched roasting by arranging the oxygen spray gun, the buffer tank and the negative pressure induced draft device, the roasting process adopts pure oxygen as oxidant, and has the advantages of less slag discharge, less hexavalent chromium contained in the waste residue and easy detoxification of the residue compared with air roasting; not only greatly improves the yield of the kiln body in unit time, but also obviously reduces the energy consumption and the power consumption. Compared with air roasting of chromite, the pure oxygen roasting method has the advantages that the utilization rate of alkali is high, the oxidation rate of chromium is high, and the advantages of oxygen-enriched roasting equipment are reflected.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
FIG. 1 is a schematic view of the sectional structure of chromite oxygen-enriched roasting equipment along the axial direction of a kiln body;
FIG. 2 is a schematic view of the sectional structure of the chromite oxygen-enriched roasting equipment along the radial direction of the kiln body.
The specific implementation mode is as follows:
the present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be noted that in the description of the present invention, the terms indicating the orientation or the positional relationship are based on the orientation or the positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, such as "connected," which may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or a connection between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention in a specific context.
Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature in direct contact with the first and second features, or in indirect contact with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1-2: the utility model discloses a chromite oxygen boosting roasting equipment, include:
the kiln body 4 that the slope set up, its kiln head height is less than the kiln tail height, kiln body 4 structure includes:
the kiln body comprises a refractory brick layer 3, a heat insulation layer 2 is arranged outside the refractory brick layer 3, a kiln body outer skin 1 is arranged outside the heat insulation layer 2, and a rotating wheel 12 is fixedly arranged outside the kiln body outer skin 1;
the kiln head of the kiln body 4 is provided with a natural gas inlet and a natural gas outlet 101, and the natural gas inlet is connected with a natural gas pipeline 41; a feed inlet 102 and a negative pressure induced draft device 11 are arranged at the tail of the kiln body 4;
a plurality of groups of oxygen spray gun units are arranged on the kiln body 4, each group of oxygen spray gun units comprises a plurality of oxygen spray guns 9, the oxygen spray guns 9 are fixed outside the kiln body 4 in a surrounding manner through mounting mechanisms, the oxygen spray guns 9 are connected with a buffer tank 6 through oxygen pipelines 8, and the nozzle ends of the oxygen spray guns extend into the kiln body;
riding wheels 5 for supporting the kiln body are arranged on two sides of the outside of the kiln body 4; and the transmission device is arranged below the kiln body 4.
The working principle is as follows: the natural gas inlet is opened, natural gas is ignited, then the mixed chromite material is put into the kiln body 4 through the tail feed inlet 102 of the kiln body 4, when the chromite material in the kiln body 4 is controlled to rotate to the position of the oxygen spray gun unit at a constant speed through the transmission device, oxygen is injected into the kiln body through the oxygen spray gun 9 under program control after passing through the pipeline 8, so that the oxygen reacts with the chromite material, the oxygen spray gun unit rotates along with the kiln body 4, each time the material rotates to the bottom in the kiln body 4, the oxygen spray gun 9 starts to spray oxygen until the chromite material fully reacts, and the oxygen is discharged through the kiln body discharge port 101. The riding wheels 5 are used for supporting the limiting kiln body 4 and supporting the kiln body 4 to enable the kiln body 4 to have a certain inclination angle. The buffer tank 6 supplies oxygen to the oxygen spray gun 9 through an oxygen pipeline 8, and the buffer tank 9 has a buffer function. After the negative pressure induced draft device 11 is opened, tail gas and dust of the kiln body are absorbed, and smoke in the kiln body 4 can be discharged in time. The utility model discloses an oxygen is industrial oxygen or air and industrial oxygen's mist, and oxygen volume fraction is 30 ~ 70%, and the oxygen volume fraction of the 4 tail gases of the kiln body is greater than 9%. The utility model discloses not only improve the output of the unit interval kiln body greatly, obviously reduced energy consumption and consumption moreover. Compared with air roasting of chromite, the pure oxygen roasting method has the advantages that the utilization rate of alkali is high, the oxidation rate of chromium is high, and the advantages of oxygen-enriched roasting equipment are reflected.
In the technical scheme, the kiln body 4 comprises a feeding section 42, a kiln body high-temperature roasting section 43 and a discharging section 44, the feeding section 42 and the kiln body high-temperature roasting section 43 are both connected with natural gas pipelines, the temperature of the feeding section 44 is controlled to be 400-600 ℃ through a temperature controller, the temperature of the kiln body high-temperature roasting section 43 is controlled to be 600-800 ℃ through the temperature controller, and the temperature of the kiln body high-temperature discharging section 42 is controlled to be 1000 ℃ through the temperature controller. Along with the rotation of the kiln body 4, the chromite moves to the kiln body high-temperature roasting section 43 from the feeding section, the chromite passing through the kiln body high-temperature roasting section 43 fully reacts, then moves to the discharging section, and finally is discharged from the discharging port 101. The temperature control of the feeding section 42, the kiln body high-temperature roasting section 43 and the discharging section 44 is realized by natural gas, valves and temperature controllers, and is the prior common technology.
In the technical scheme, each group of the oxygen spray gun units is provided with 12-20 oxygen spray guns 9, and the oxygen spray gun unit in the figure 2 is provided with 12 oxygen spray guns; oxygen spray gun units are arranged outside the feeding section 42, the kiln body high-temperature roasting section 43 and the discharging section 44.
In the above technical solution, the structure of the mounting mechanism includes:
two clamping rings 13, and the clamping rings 13 are fixedly clamped outside the kiln body 4 through bolts;
a plurality of mounting hole sites 131 with external threads are arranged on the tightening ring 13, the oxygen spray gun 9 is arranged in the mounting hole sites 131, the mounting hole sites 131 are in threaded connection with locking nuts 14, and the oxygen spray gun 9 is locked and fixed on the tightening ring 13 through the locking nuts 14;
the tightening ring 13 is provided with a long groove 132, the kiln body outer skin 1 is integrally formed with a limiting block 103, and the limiting block 103 is embedded into the long groove 132. Through the arrangement, 12 oxygen spray guns 9 shown in FIG. 2 are arranged outside the kiln body 4, and meanwhile, the long grooves 132 of the hooping ring 13 are matched with the limiting blocks 103 of the kiln body 4, so that the hooping ring 13 can be effectively prevented from generating axial displacement along the surface of the kiln body 4, and the installation position of the oxygen spray guns 9 is more stable.
In the technical scheme, the inclination angle of the kiln body 4 is 1-10 degrees.
In the above technical solution, the structure of the transmission device includes:
and a transmission motor 10, an output shaft of which is fixedly provided with a transmission gear 15, wherein the transmission gear 15 is meshed with the rotating wheel 12. The transmission motor 10 drives the transmission gear 15 to enable the rotating wheel 12 meshed with the transmission gear 15 to drive the kiln body 4 to rotate at a constant speed.
The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (6)
1. The utility model provides a chromite oxygen boosting calcination equipment which characterized in that includes:
the kiln body that the slope set up, its kiln head height is less than kiln tail height, kiln body structure includes:
the kiln body comprises a refractory brick layer, a kiln body outer skin and a rotary wheel, wherein a heat insulation layer is arranged outside the refractory brick layer;
the kiln head of the kiln body is provided with a natural gas inlet and a natural gas outlet, and the natural gas inlet is connected with a natural gas pipeline; a feed inlet and a negative pressure induced draft device are arranged at the kiln tail of the kiln body;
a plurality of groups of oxygen spray gun units are arranged on the kiln body, each group of oxygen spray gun units comprises a plurality of oxygen spray guns, the oxygen spray guns are fixed outside the kiln body in a surrounding manner through mounting mechanisms, the oxygen spray guns are connected with a buffer tank through oxygen pipelines, and the nozzle ends of the oxygen spray guns extend into the kiln body;
the riding wheels are used for supporting the kiln body and are arranged on two sides of the exterior of the kiln body; and the transmission device is arranged below the kiln body.
2. The chromite oxygen-enriched roasting equipment according to claim 1, wherein the kiln body comprises a feeding section, a kiln body high-temperature roasting section and a discharging section, the feeding section and the kiln body high-temperature roasting section are both connected with natural gas pipelines, the temperature of the feeding section is controlled to be 400-600 ℃ through a temperature controller, the temperature of the kiln body high-temperature roasting section is controlled to be 600-800 ℃ through the temperature controller, and the temperature of the kiln body high-temperature discharging section is controlled to be 1000 ℃ through the temperature controller.
3. The chromite oxygen-enriched roasting equipment according to claim 2, wherein each group of the oxygen spray gun unit is provided with 12-20 oxygen spray guns; and oxygen spray gun units are arranged outside the feeding section, the kiln body high-temperature roasting section and the discharging section.
4. The chromite oxygen-rich roasting apparatus defined in claim 1, wherein the mounting means includes:
the two clamping rings are fixedly clamped outside the kiln body through bolts;
a plurality of mounting hole sites with external threads are arranged on the hooping ring, the oxygen spray gun is arranged in the mounting hole sites, the mounting hole sites are in threaded connection with locking nuts, and the oxygen spray gun is locked and fixed on the hooping ring through the locking nuts;
the kiln body outer skin integrated into one piece is provided with a limiting block, and the limiting block is embedded into the long groove.
5. The chromite oxygen-enriched roasting apparatus of claim 1, wherein the inclination angle of the kiln body is 1 ° to 10 °.
6. The chromite oxygen-enriched roasting apparatus defined in claim 1, wherein the transmission means is constructed to include:
and the transmission motor is characterized in that a transmission gear is fixedly arranged on an output shaft, and the transmission gear is meshed with the rotating wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023174289.9U CN214142483U (en) | 2020-12-25 | 2020-12-25 | Chromite oxygen-enriched roasting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023174289.9U CN214142483U (en) | 2020-12-25 | 2020-12-25 | Chromite oxygen-enriched roasting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214142483U true CN214142483U (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023174289.9U Active CN214142483U (en) | 2020-12-25 | 2020-12-25 | Chromite oxygen-enriched roasting equipment |
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| Country | Link |
|---|---|
| CN (1) | CN214142483U (en) |
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2020
- 2020-12-25 CN CN202023174289.9U patent/CN214142483U/en active Active
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