CN203112896U - Material mixing and feeding device for rare earth ore concentrate baking - Google Patents
Material mixing and feeding device for rare earth ore concentrate baking Download PDFInfo
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- CN203112896U CN203112896U CN2013201196617U CN201320119661U CN203112896U CN 203112896 U CN203112896 U CN 203112896U CN 2013201196617 U CN2013201196617 U CN 2013201196617U CN 201320119661 U CN201320119661 U CN 201320119661U CN 203112896 U CN203112896 U CN 203112896U
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Abstract
The utility model relates to a material mixing and feeding device for rare earth ore concentrate baking, which comprises a vertically-arranged double-spiral conical mixing machine and a horizontally-arranged spiral feeding machine, wherein the spiral feeding machine is arranged below the double-spiral conical mixing machine, and the discharge port of the double-spiral conical mixing machine is in butt joint with the feed port of the horizontal spiral feeding machine. The material mixing and feeding device is characterized in that the top of the double-spiral conical mixing machine is provided with vent holes, and the vent holes are connected with a tail gas recovery system for rare earth ore concentrate baking. The material mixing and feeding device has the advantages that the uniformity of mixed materials is ensured, and the dosage of sulfuric acid is reduced; and the interior of the double-spiral conical mixing machine is in a micro negative pressure state, in such a way, the mixing can be completed in a negative pressure state, so that volatilization tail gas generated by mixing can be recovered, and the mixed materials have certain temperature, so that the after baking efficiency is improved.
Description
Technical field
The utility model relates to a kind of mixing of materials and feeding device of metallurgical technology technical field, relates in particular to a kind of mixing of materials for the rare earth ore concentrate roasting and feeding device.
Background technology
In the prior art, mixed rare earth concentrates concentrated sulfuric acid roasting method realizes by roasting that in the revolution roasting kiln revolution roasting kiln generally adopts single-stage revolution roasting kiln, 1.5 meters to 2.2 meters of internal diameters, and length is at 25 meters to 35 meters.Comprise following composition in the roasting tail gas that roasting produces: the sulfuric acid mist of moisture, near roasting later stage (kiln hood) volatilization of HF, the volatilization of generation, sulphur trioxide that sulfuric acid decomposes generation, sulfurous gas etc. are reacted in roasting in earlier stage.Above-mentioned roasting tail gas is generally discharging in the lump, and its consequence that causes is that exhaust gas volumn is big, is difficult to reclaim; Even reclaim, restored acid concentration is low and contain a large amount of HF, can't retrieval system use.That is to say that a large amount of HF sneaks into reclaim(ed) sulfuric acid, make the two be difficult to separate and be used.Therefore in existing mixed rare earth concentrates concentrated sulfuric acid roasting method and apparatus, recovered acid can't retrieval system in, mixed rare earth concentrates and the vitriol oil adopt artificial spice usually, join in the equipment discontinuously.
The applicant has invented a kind of mixed rare earth concentrates concentrated sulfuric acid roasting technology in application number is 201110006631.0 patent application, its method by plural serial stage revolution roasting is carried out roasting, can handle the mixed rare earth concentrates that contains REO ≧ 50%.The heterogeneity tail gas that the reaction that the plural serial stage revolution roasting method of segmentation carries out segmentation respectively produces can reclaim separately respectively in segmentation, is easy to recycling.The applicant is 201110379337.4 patent application at application number, having designed plural serial stage revolution roasting tail gas reclaims respectively, the processing method of Chu Liing respectively, this method can reach 80% recovered acid by reclaim(ed) sulfuric acid content, can generate heat when recovered acid mixes with the vitriol oil, the volatile acid in the recovered acid can overflow with the volatile acid that reaction generates simultaneously.Above-mentioned two patent applications are all incorporated this application in the mode of whole introducings.Therefore, when the method for the plural serial stage revolution roasting in utilizing foregoing invention is carried out roasting, use traditional artificial spice also no longer suitable.
The utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art and defective.For this reason, the utility model provides a kind of mixing of materials for the rare earth ore concentrate roasting and feeding device, it comprises duplex cone-type mixer and the horizontally disposed screw feeder of vertical setting, described screw feeder is arranged on the below of duplex cone-type mixer, the feed opening of duplex cone-type mixer docks with the opening for feed of flat spin feeding machine, wherein, the top of described duplex cone-type mixer is provided with venting hole, and this venting hole is used for docking with the exhaust gas recovery system of rare earth ore concentrate roasting.
Preferably, described duplex cone-type mixer comprises obconic mixing drum, and the top of mixing drum is connected with transmission mechanism, is provided with gyratory agitation device in the mixing drum, and transmission mechanism is connected with gyratory agitation device;
Preferably, described transmission mechanism comprises motor and the step-down gear that is connected with motor, and gyratory agitation device comprises pivoted arm and two screw rods that are connected respectively with the pivoted arm two ends, and two screw rods tilt, asymmetric setting, have different lengths;
Preferably, the top of the mixing drum of described duplex cone-type mixer is provided with two material inlets, an observation port;
Preferably, the flat spin feeding machine comprises frame and framework, driving mechanism, transport tube, screw shaft, opening for feed and discharge port, transport tube is supported by frame and framework, and opening for feed and discharge port are arranged on the transport tube, and the screw shaft in driving mechanism and the transport tube is connected.
Mixing of materials of the present utility model and feeding device comprise duplex cone-type mixer and the horizontally disposed screw feeder of vertical setting, have guaranteed the homogeneity of mixing.Venting hole is established at duplex cone-type mixer top, docks with the exhaust gas recovery system of rare earth ore concentrate roasting, thereby guarantees that duplex cone-type mixer inside is micro-vacuum state.This not only can make to be blended under the negative pressure state and finish, and makes mixing produce volatilization tail gas and is recycled, and can also make mixture keep certain temperature, improves after baking efficient; And the sour retrieval system recycling smoothly of the lower concentration that makes recovery.The mixing ability that the duplex cone-type mixer is good, and by controlling the mass output rate of screw feeder, make the material level in the duplex cone-type mixer keep rational position, thereby guaranteed the mixing time of material, high mixing degree material is to improving the reactivity of material, it is significant to reduce sulfuric acid consumption, and recovered acid contains a certain amount of volatilizable acid, and concentration is low, therefore recovered acid mixes with the vitriol oil and can generate heat, and generate volatilizable acid with oven dry rare earth ore concentrate reaction, and mixing in the duplex cone-type mixer under negative pressure state, the volatilizable acid of generation can obtain efficient recovery.
Description of drawings
Fig. 1 a is the front view of mixing of materials of the present utility model and feeding device;
Fig. 1 b is the vertical view of the duplex cone-type mixer of mixing of materials of the present utility model and feeding device;
Fig. 1 c is the left view of the flat spin feeding machine of mixing of materials of the present utility model and feeding device;
Fig. 2 utilizes mixing of materials of the present utility model and process schematic representation that feeding device carries out the rare earth ore concentrate roasting.
Reference numeral: 1---duplex cone-type mixer, 11---feed opening, 12---mixing drum, 13---transmission mechanism, 131---the mixing machine motor, 132---step-down gear, 14---gyratory agitation device, 141---pivoted arm, 142---screw rod, 143---material inlet, 144---observation port, 145---venting hole, bleeder valve---15; 2---screw feeder, 21---opening for feed, 22---frame, base---221, carriage---222, bearing---223,23---framework, feeding machine motor---231, shaft coupling---232,24---driving mechanism, 25---transport tube, 26---screw shaft, 21---opening for feed, 27---discharge port.
Embodiment
Be elaborated below in conjunction with the preferred embodiment of accompanying drawing to the mixing of materials for the rare earth ore concentrate roasting of the present utility model and feeding device.
Fig. 1 a is the front view of the utility model mixing of materials and feeding device.Shown in Fig. 1 a, duplex cone-type mixer 1 and the horizontally disposed screw feeder 2 that comprises vertical setting for mixing of materials and the feeding device of rare earth ore concentrate roasting of the present utility model, described screw feeder is arranged on the below of duplex cone-type mixer, and the feed opening 11 of duplex cone-type mixer docks with the opening for feed 21 of flat spin feeding machine.
The duplex cone-type mixer comprises obconic mixing drum 12, and the top of mixing drum is connected with transmission mechanism 13, is provided with gyratory agitation device 14 in the mixing drum, and transmission mechanism is connected with gyratory agitation device.Wherein transmission mechanism comprises mixing machine motor 131 and the step-down gear 132 that is connected with motor; Gyratory agitation device comprises pivoted arm 141 and 142, two screw rods of two screw rods of being rotationally connected respectively with the pivoted arm two ends tilt, asymmetric setting, has different lengths.
Shown in vertical view Fig. 1 b of duplex cone-type mixer, as can be seen, the circular top plate of the mixing drum of duplex cone-type mixer is provided with at least one material inlet 143, an observation port 144, as the vertical view of the duplex cone-type mixer among Fig. 2, two material inlets are set, an observation port.
On the circular top plate of duplex cone-type mixer, also be provided with venting hole 145, this venting hole docks with the exhaust gas recovery system of rare earth ore concentrate roasting, thereby guarantee that duplex cone-type mixer inside is micro-vacuum state, the volatilization gas that the mixing of materials process is produced enters the exhaust gas recovery system of rare earth ore concentrate roasting.Above-mentioned four mouths are on average arranged on the circumference at the top of duplex cone-type mixer.
The flat spin feeding machine is arranged on the below of duplex cone-type mixer, docks with the feed opening of duplex cone-type mixer, is used for that mixture is sent into the revolution roasting kiln and carries out roasting.The transfer of bleeder valve 15 control materials can be set more than the feed opening.
The flat spin feeding machine comprises frame 22 and framework 23, driving mechanism 24, transport tube 25, screw shaft 26, opening for feed 21 and discharge port 27, described transport tube is supported by described frame and framework, described opening for feed and discharge port are arranged on the described transport tube, screw shaft in described driving mechanism and the described transport tube is connected, and drives this screw shaft.Wherein, the opening for feed 21 of flat spin feeding machine docks with the feed opening 11 of duplex cone-type mixer.Described frame is made of base 221, carriage 222, bearing 223, and described framework is made of feeding machine motor 231, shaft coupling 232.The left view of flat spin feeding machine of the present utility model is shown in Fig. 1 b.
Process flow sheet below in conjunction with the rare earth ore concentrate roasting of Fig. 2 is further detailed mixing of materials of the present utility model and feeding device.With reference to shown in Figure 2, the method for rare earth ore concentrate roasting comprises that rare earth ore concentrate oven dry, rare earth ore concentrate, sulfuric acid, recovered acid are metered into, and mixing, control output specifically comprise following operation:
A. rare earth ore concentrate oven dry: mixed rare earth concentrates is in the oven dry of revolution drying kiln.Oven dry back rare earth ore concentrate directly advances to store the kiln storage, stores the insulation of kiln do and handles, and makes oven dry back rare earth ore concentrate less at storage kiln temperature drop as far as possible;
B. material metering output: rare earth ore concentrate is metered into by vibratory feeder, and sulfuric acid, recovered acid add by liquid meter respectively;
C. the rare earth ore concentrate, sulfuric acid, the recovered acid that add the duplex cone-type mixer are mixed at the duplex cone-type mixer;
D. the screw feeder that docks with duplex cone-type mixer feed opening level with mixture send into the revolution roasting kiln carry out roasting;
E. control the mass output rate of screw feeder, make the material level in the duplex cone-type mixer keep rational position, thereby guarantee the mixing time of material and the uniformity coefficient of mixing of materials;
F. the venting hole of duplex cone-type mixer top setting docks with the exhaust gas recovery system of rare earth ore concentrate roasting, guarantee that duplex cone-type mixer inside is micro-vacuum state, the volatilization gas that the mixing of materials process is produced enters the exhaust gas recovery system of rare earth ore concentrate roasting.
Can further find out by above-mentioned technological process, the mixing of materials that is used for the rare earth ore concentrate roasting and feeding device that the utility model relates to adopt duplex cone-type mixer and the horizontally disposed screw feeder that vertically arranges, to dry back rare earth ore concentrate insulation storage in advance and add the duplex cone-type mixer by metering system, the vitriol oil and recovered acid measure back and stream adding duplex cone-type mixer respectively by two metering systems simultaneously, duplex cone-type mixer feed opening docks with the flat spin feeding machine, mass output rate by the control screw feeder, make the material level in the duplex cone-type mixer keep rational position, thereby guarantee the mixing time of material and the uniformity coefficient of mixing of materials.Venting hole is established at duplex cone-type mixer top, docks with the exhaust gas recovery system of rare earth ore concentrate roasting, guarantees that duplex cone-type mixer inside is micro-vacuum state, and the volatilization gas that the mixing of materials process is produced enters the exhaust gas recovery system of rare earth ore concentrate roasting.
Therefore, the utility model not only can make to be blended under the negative pressure state and finish, and makes mixing produce volatilization tail gas and is recycled, and can also make mixture keep certain temperature, improves after baking efficient; And the sour retrieval system recycling smoothly of the lower concentration that makes recovery; The mixing ability that the duplex cone-type mixer is good, and by controlling the mass output rate of screw feeder, make the material level in the duplex cone-type mixer keep rational position, thereby guaranteed the mixing time of material, high mixing degree material is to improving the reactivity of material, and it is significant to reduce sulfuric acid consumption.
Need to prove that at last the above only is preferred embodiment of the present utility model, rather than to the restriction of technical solutions of the utility model, any to of the present utility model do be equal to replacement, still in protection domain of the present utility model.
Claims (5)
1. mixing of materials and feeding device that is used for the rare earth ore concentrate roasting, the duplex cone-type mixer (1) and the horizontally disposed screw feeder (2) that comprise vertical setting, described screw feeder is arranged on the below of duplex cone-type mixer, the feed opening of duplex cone-type mixer (11) docks with the opening for feed (21) of flat spin feeding machine, it is characterized in that, the top of described duplex cone-type mixer is provided with venting hole (145), and this venting hole is connected with the exhaust gas recovery system of rare earth ore concentrate roasting.
2. mixing of materials as claimed in claim 1 and feeding device, it is characterized in that, described duplex cone-type mixer comprises obconic mixing drum (12), the top of described mixing drum is connected with transmission mechanism (13), be provided with gyratory agitation device (14) in the described mixing drum, described transmission mechanism is connected with described gyratory agitation device.
3. mixing of materials as claimed in claim 2 and feeding device, it is characterized in that, described transmission mechanism comprises motor (131) and the step-down gear that is connected with motor (132), described gyratory agitation device comprises pivoted arm (141) and two screw rods (142) that are connected respectively with the pivoted arm two ends, described two screw rods tilt, asymmetric setting, have different lengths.
4. mixing of materials as claimed in claim 2 and feeding device is characterized in that, the top of described mixing drum is provided with at least one material inlet (143) and an observation port (144).
5. as the arbitrary described mixing of materials of claim 1 to 4 and feeding device, it is characterized in that, described flat spin feeding machine comprises frame (22) and framework (23), driving mechanism (24), transport tube (25), screw shaft (26), opening for feed (21) and discharge port (27), described transport tube is supported by described frame and framework, described opening for feed and discharge port are arranged on the described transport tube, and the screw shaft in described driving mechanism and the described transport tube is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201196617U CN203112896U (en) | 2013-03-15 | 2013-03-15 | Material mixing and feeding device for rare earth ore concentrate baking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201196617U CN203112896U (en) | 2013-03-15 | 2013-03-15 | Material mixing and feeding device for rare earth ore concentrate baking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203112896U true CN203112896U (en) | 2013-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201196617U Expired - Fee Related CN203112896U (en) | 2013-03-15 | 2013-03-15 | Material mixing and feeding device for rare earth ore concentrate baking |
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| CN (1) | CN203112896U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019015518A1 (en) * | 2017-07-17 | 2019-01-24 | 中国恩菲工程技术有限公司 | Apparatus for continuous decomposition of rare earth concentrate |
| CN115368924A (en) * | 2022-09-07 | 2022-11-22 | 河南省科学院 | Large-scale living beings baking furnace charge-in system |
-
2013
- 2013-03-15 CN CN2013201196617U patent/CN203112896U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019015518A1 (en) * | 2017-07-17 | 2019-01-24 | 中国恩菲工程技术有限公司 | Apparatus for continuous decomposition of rare earth concentrate |
| CN115368924A (en) * | 2022-09-07 | 2022-11-22 | 河南省科学院 | Large-scale living beings baking furnace charge-in system |
| CN115368924B (en) * | 2022-09-07 | 2023-11-03 | 河南省科学院 | Large-scale living beings baking furnace feed system |
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Legal Events
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20180315 |