CN107287416A - Wet-process metallurgy method and gas-liquid-solid three-phase wet method reactor - Google Patents

Abstract

The invention discloses a hydrometallurgy method and a gas-liquid-solid three-phase wet reactor, which belong to the technical field of hydrometallurgy and are designed to solve the problems of small gas contact area caused by large bubble volume in the existing method. In the hydrometallurgical method of the present invention, the metallurgical material is filled into the reactor body, air is supplied to the metallurgical material through the aeration head, and the air bubbles generated by the aeration head are sheared and broken to obtain a small space for increasing the gas contact area. bubble. The gas-liquid-solid three-phase wet reactor of the present invention includes a canned reactor body, an aeration head is arranged in the middle or lower part of the reactor body, and a disc turbine paddle is arranged above the aeration head; the disc turbine paddle It is installed at the bottom of the stirring device and can rotate with the stirring device to shear and break the air bubbles generated by the aeration head into smaller air bubbles. The hydrometallurgy method and the gas-liquid-solid three-phase wet reactor of the invention increase the contact surface of the gas, improve the utilization rate, lower the cost, and enhance the mixed mass transfer of the gas-liquid-solid three-phase.

Description

Hydrometallurgical method and gas-liquid-solid three-phase wet reactor

technical field

The invention relates to the technical field of hydrometallurgy, in particular to a hydrometallurgical method and a gas-liquid-solid three-phase wet reactor for implementing the hydrometallurgical method.

Background technique

Hydrometallurgy is a process in which metal ore raw materials are placed in an aqueous solution of acidic or alkaline media for chemical treatment or organic solvent extraction, separation of impurities, and extraction of metals and their compounds. It is a very commonly used mineral decomposition, extraction and removal Miscellaneous craft.

Hydrometallurgy needs to be carried out in a hydrometallurgical reactor, because there are factors such as high viscosity of the reaction medium and high density of metal minerals, which lead to the fact that the solid is extremely easy to sink to the bottom, the gas-liquid-solid three-phase contact is insufficient, and the metal Reduced mineral conversion, etc.

The defects of existing hydrometallurgical reactors are: 1. The gas entering the hydrometallurgical reactor produces large bubbles and small contact surface, resulting in low gas utilization rate; The large size leads to problems such as easy blockage of the aerator head and uneven gas diffusion.

Contents of the invention

It is an object of the present invention to propose a hydrometallurgical process with an increased gas contact surface.

Another object of the present invention is to propose a gas-liquid-solid three-phase wet reactor with simpler operation and lower cost.

For reaching this purpose, on the one hand, the present invention adopts following technical scheme:

A hydrometallurgical method, the metallurgical material is filled into the reactor body, gas is supplied to the metallurgical material through the aeration head, and the air bubbles generated by the aeration head are sheared and broken, so as to obtain area of small air bubbles.

Especially, in the process of hydrometallurgy, the gas inlet pressure per 100kg of metal ore is 0.3MPa-1MPa, the gas temperature is 100℃-260℃; the gas flow rate of the gas inlet is 0.1m ³ /h-10m ³ /h.

On the other hand, the present invention adopts the following technical solutions:

A gas-liquid-solid three-phase wet reactor for performing the above-mentioned hydrometallurgical method, comprising a canned reactor body, an aeration head is arranged in the middle or lower part of the reactor body, and the aeration head A disc turbine paddle is arranged above; the disc turbine paddle is set at the bottom of the stirring device and can rotate with the stirring device, so as to shear and break the air bubbles generated by the aerator head into smaller air bubbles .

In particular, a radial sieve plate is also provided in the reactor body, and the extending direction of the radial sieve plate is parallel to the axial direction of the reactor body and is located above the aeration head; A plurality of sieve holes are arranged on the radial sieve plate.

Further, one side of the radial sieve plate is attached to the inner wall of the reactor body, and the opposite side faces the axial direction of the reactor body; between the above-mentioned two sides of the radial sieve plate The width is 1/15 to 1/10 of the inner diameter of the radial sieve plate.

In particular, the distance between the bottom edge of the radial sieve plate and the inside of the bottom surface of the reactor body is 1/15 to 1/7 of the height of the inner cavity of the reactor body, and the top of the radial sieve plate The distance between the side and the inside of the top surface of the reactor body is 1/5 to 3/5 of the height of the inner cavity of the reactor body.

In particular, a down-pressing turbine paddle is also provided in the reactor body, and the down-pressing turbine paddle is arranged on the stirring device and is located above the disk turbine paddle, and the down-pressing turbine paddle can follow the stirring The device rotates.

Further, the stirring device includes a stirring shaft extending into the reactor body; the aeration head is arranged at the bottom end of the stirring shaft, and the disc turbine paddle is arranged at 1/10 of the stirring shaft From 1/7 to 1/7, the down-pressing turbine paddle is set at 1/5 to 1/3 of the stirring shaft.

In particular, the stirring device is a hollow shaft structure; the top of the stirring device is provided with a gas inlet and/or a steam inlet.

In particular, a feed port, a feed port, a discharge port, a temperature measuring port, an exhaust port and/or a sight glass are provided on the reactor body; a bottom pedal is provided at the bottom of the reactor body , the material taking port and/or the material discharging port is located in the area where the bottom pedal is located.

The hydrometallurgical method of the present invention shears and breaks the air bubbles generated by the aeration head to obtain small air bubbles for increasing the gas contact area, which increases the gas contact area, improves the utilization rate, and is simpler to operate and less expensive. Lower, enhanced gas-liquid-solid three-phase mixed mass transfer, to achieve full contact mixing of gas-liquid-solid three-phase, compared with the traditional process can improve the reaction efficiency by 10% -40%.

The gas-liquid-solid three-phase wet reactor of the present invention is provided with a disk turbine paddle above the aeration head, and the disk turbine paddle can rotate with the stirring device to shear and break the air bubbles generated by the aeration head into smaller bubbles , realizing the above-mentioned hydrometallurgical method, the operation is simpler and the cost is lower.

Description of drawings

Fig. 1 is a schematic structural view of a gas-liquid-solid three-phase wet reactor provided by a preferred embodiment of the present invention;

Fig. 2 is the top view of the reactor body and the radial sieve plate structure provided by the preferred embodiment of the present invention;

Fig. 3 is the top view of the reactor body provided by the preferred embodiment of the present invention;

Fig. 4 is a schematic structural view of the aeration head provided by the preferred embodiment of the present invention.

In the picture:

1. Reactor body; 2. Aeration head; 3. Disc turbine paddle; 4. Stirring device; 5. Radial sieve plate; 9. Discharging port; 10. Temperature measuring port; 11. Exhaust port; 12. Sight mirror; 13. Bottom pedal; 41. Stirring shaft; 42. Gas inlet; 43. Steam inlet.

detailed description

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Preferred embodiment:

This preferred embodiment discloses a gas-liquid-solid three-phase wet reactor. As shown in Figures 1 to 4, the gas-liquid-solid three-phase wet reactor includes a canned reactor body 1, and an aeration head 2 is arranged in the middle or lower part of the reactor body 1, and the aeration head 2 Disc turbine paddle 3 is arranged above; disk turbine paddle 3 is arranged on stirring device 4 and can rotate with stirring device 4, so as to shear and break the air bubbles generated by aeration head 2 into smaller bubbles.

At the same time, this preferred embodiment discloses a hydrometallurgical method. After filling the metallurgical material into the reactor body 1, air is sent to the metallurgical material through the aeration head 2, and the air bubbles generated by the aeration head 2 are sheared and broken. To obtain small bubbles used to increase the gas contact area. In the process of hydrometallurgy, the inlet pressure per 100kg of metal ore is 0.3MPa-1MPa, the gas temperature is 100℃-260℃; the gas flow rate at the inlet is 0.1m ³ /h-10m ³ /h.

The disc turbine paddle 3 is located above the aerator head 2 and can rotate under the drive of the stirring device 4, which is used to shear and break the bubbles generated by the aerator head 2, increase the gas-liquid contact area, and improve the gas utilization rate. It is suitable for The gas-liquid-solid three-phase reaction process in the hydrometallurgy process can especially strengthen the gas reaction in high-viscosity media.

The disc turbine paddle 3 is preferably a six straight-blade disc turbine, which has a higher shearing and crushing efficiency of the air bubbles and a more thorough shearing and crushing. The stirring device 4 is connected to the motor through a reducer and a transmission device, and the motor controls the stirring speed through a frequency conversion controller.

As shown in Figures 1 and 2, a radial sieve plate 5 is also provided in the reactor body 1, and the direction in which the radial sieve plate 5 extends is parallel to the axial direction of the reactor body 1, and is located at the center of the aeration head 2. Above; the radial sieve plate 5 is provided with a plurality of evenly distributed sieve holes. The radial sieve plate 5 can further cut the bubbles in the reaction substance, further increase the gas-liquid contact area, improve the gas utilization rate, and promote the full dispersion and contact between the reaction gas, medium and metal minerals, and is not easy to block .

The specific installation method and structure of the radial sieve plate 5 are not limited, as long as it can achieve the purpose of breaking air bubbles. Preferably, one side of the radial sieve plate 5 is attached to the inner wall of the reactor body 1, and the opposite side faces the axial direction of the reactor body 1; the width between the above-mentioned two sides of the radial sieve plate 5 is 1/15 to 1/10 of the inner diameter of the radial sieve plate 5 .

The distance between the bottom edge of the radial sieve plate 5 and the inside of the bottom surface of the reactor body 1 is 1/15 to 1/7 of the height of the inner cavity of the reactor body 1, and the top edge of the radial sieve plate 5 and the reactor body 1 The distance between the inner sides of the top surface of the reactor body 1 is 1/5 to 3/5 of the height of the inner cavity of the reactor body 1; the diameter of the screen hole is preferably 5mm-20mm; each reactor body 1 is provided with 3 to 6 radial The sieve plate 5, all radial sieve plates 5 are evenly arranged radially with respect to the axis of the reactor body 1.

On the basis of the above-mentioned structure, the down-pressing turbine paddle 6 is also arranged in the reactor body 1, the down-pressing turbine paddle 6 is arranged on the stirring device 4 and is positioned above the disk turbine paddle 3, and the down-pressing turbine paddle 6 can follow the Stirring device 4 rotates.

That is, the downward pressure turbine paddle 6, the disk turbine paddle 3 and the aeration head 2 form a three-layer aeration stirring assembly from top to bottom. This combined structure can cut and break the bubbles generated by the aerator head 2 to the micron level; the down-pressing turbine paddle 6 enhances the gas-liquid-solid three-phase mixed mass transfer, fully mixes the liquid and solid, and fully disperses the solid particles to realize the reaction between the gas and the solid particles. The largest contact area of metal minerals, the reaction effect is better.

On the basis of the above structure, the stirring device 4 includes a stirring shaft 41 extending into the reactor body 1; 10 to 1/7, the downward pressure turbine paddle 6 is arranged at 1/5 to 1/3 of the stirring shaft 41 . Wherein, the aeration head 2 is connected by a sealed shaft joint, and the diameter of the aeration outlet is 2-10 mm.

The stirring shaft 41 can be a hollow shaft structure, or a solid columnar structure. When the stirring shaft 41 can be a hollow shaft structure, the top of the stirring device 4 is provided with a gas inlet 42 and a steam inlet 43 . The setting of the steam inlet 43 can effectively solve the problem of blockage of the aeration outlet caused by the high viscosity of the reaction medium, and ensure the continuity and continuity of the reaction.

As shown in FIGS. 1 and 3 , the reactor body 1 is provided with a feed port 7 , a feed port 8 , a discharge port 9 , a temperature measuring port 10 , an exhaust port 11 and/or a sight glass 12 .

In order to make the installation of the reactor body 1 more stable and simple, a plurality of bottom pedals 13 are arranged at the bottom of the reactor body 1; pick and place. The bottom pedal 13 is a stepped structure sunken from the outside to the inside of the reactor body 1, and the fixed mounting parts are snapped into the stepped structure; a plurality of bottom pedals 13 are arranged symmetrically with respect to the axis of the reactor body 1 to ensure that the reactor body 1 No shaking during use.

Concrete Metallurgical Example 1

Taking vanadium slag as the research object, the steps of the hydrometallurgical method for improving the gas-liquid-solid three-phase reaction are as follows: Calculate according to 100kg of vanadium slag, control the inlet pressure of the aeration device to 0.4MPa, and the gas flow rate of the inlet to 4m ³ /h, the gas temperature at the air inlet is 260°C, and the aperture of the aeration outlet is 2 mm; three radial sieve plates 5 are arranged on the side of the reactor body 1, and the height of the radial sieve plates 5 is 100% of the inner cavity height of the reactor body 1 3/5, the sieve holes are evenly distributed on the radial sieve plate 5, the diameter of the sieve holes is 20mm, the width of the radial sieve plate 5 is 1/15 of the inner diameter of the reactor body 1, and the aerator head 2 is set at the center of the stirring shaft 41 At the bottom end, the disc turbine paddle 3 is arranged at 1/7 of the stirring shaft 41 , and the downward pressure turbine paddle 6 is arranged at 1/3 of the stirring shaft 41 .

After detection and calculation, the leaching rate of vanadium in this embodiment is 98.7%, which is 14% higher than the existing hydrometallurgical reaction effect.

Specific Metallurgical Example 2

Taking vanadium-containing steel slag as the research object, the steps of the hydrometallurgical method for improving the gas-liquid-solid three-phase reaction are as follows: Calculate according to 100kg of vanadium slag, control the inlet pressure of the aeration device to 1MPa, and the gas flow rate of the inlet to 0.1m ³ /h, the gas temperature at the air inlet is 120°C, the hole diameter of the aeration outlet is 10mm, six radial sieve plates 5 are arranged on the side of the reactor body 1, and the height of the radial sieve plates 5 is the inner cavity of the reactor body 1 1/5 of the height, the sieve holes are evenly distributed, the sieve hole diameter is 5mm, the width of the radial sieve plate 5 is 1/10 of the inner diameter of the reactor body 1, and the aerator head 2 is set at the bottom end of the stirring shaft 41, circular The disc turbine paddle 3 is arranged at 1/10 of the stirring shaft 41 , and the downward pressure turbine paddle 6 is arranged at 1/5 of the stirring shaft 41 .

After detection and calculation, the leaching rate of vanadium in this embodiment is 95%, which is 18% higher than the existing hydrometallurgical reaction effect.

Specific Metallurgical Example 3

Taking vanadium extraction tailings as the research object, the steps of the hydrometallurgical method for improving the gas-liquid-solid three-phase reaction are as follows: Calculated according to 100kg of vanadium slag, the air inlet pressure of the aeration device is controlled to be 0.1MPa, and the gas flow rate of the air inlet is 7m ³ /h, the gas temperature at the air inlet is 200°C, the aperture of the aeration outlet is 8mm, four radial sieve plates 5 are arranged on the side of the reactor body 1, and the height of the radial sieve plates 5 is within the reactor body 1 2/5 of the cavity height, the sieve holes are evenly distributed, the sieve hole diameter is 10mm, the width of the radial sieve plate 5 is 1/12 of the inner diameter of the reactor body 1, the aerator head 2 is set at the bottom end of the stirring shaft 41, The disc turbine paddle 3 is arranged at 1/8 of the stirring shaft 41 , and the downward pressure turbine paddle 6 is arranged at 1/4 of the stirring shaft 41 .

After detection and calculation, the leaching rate of vanadium in this embodiment is 95%, which is 10% higher than the existing hydrometallurgical reaction effect.

Specific Metallurgical Example 4

Taking ilmenite as the research object, the steps of the hydrometallurgical method for improving the gas-liquid-solid three-phase reaction are as follows: Calculate according to 100kg of vanadium slag, control the inlet pressure of the aeration device to 0.6MPa, and the gas flow rate of the inlet to 4m ³ /h, the gas temperature at the air inlet is 230°C, the aperture of the aeration outlet is 7mm, five radial sieve plates 5 are arranged on the side of the reactor body 1, and the height of the radial sieve plates 5 is the inner cavity of the reactor body 1 2/5 of the height, the sieve holes are evenly distributed, the diameter of the sieve holes is 12 mm, the width of the radial sieve plate 5 is 1/10 of the inner diameter of the reactor body 1, and the aerator head 2 is set at the bottom end of the stirring shaft 41. The disc turbine paddle 3 is arranged at 1/9 of the stirring shaft 41 , and the downward pressure turbine paddle 6 is arranged at 1/5 of the stirring shaft 41 .

After detection and calculation, the leaching rate of titanium in this embodiment is 98.5%, which is 11% higher than the existing hydrometallurgical reaction effect.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. a kind of Wet-process metallurgy method, it is characterised in that insert metallurgical material in reaction kettle body (1), by aeration head (2) to Supplied gas in the metallurgical material, shearing-crushing is carried out to the bubble produced by aeration head (2), to obtain being used for increasing gas contact The minute bubbles of area.

2. Wet-process metallurgy method according to claim 1, it is characterised in that during hydrometallurgy, the gold per 100kg The inlet pressure for belonging to mineral is 0.3MPa-1MPa, and gas temperature is 100 DEG C -260 DEG C；The gas flow of air inlet is 0.1m³/h-10m³/h。

3. a kind of gas-liquid-solid three-phase wet method reactor for performing Wet-process metallurgy method as claimed in claim 1 or 2, its feature exists In, including canned reaction kettle body (1), middle part or bottom in the reaction kettle body (1) are provided with aeration head (2), in institute State and disc turbine oar (3) is provided with above aeration head (2)；The disc turbine oar (3) is arranged on the bottom of agitating device (4) And can be rotated with the agitating device (4), the bubble shearing-crushing that will be produced by the aeration head (2) is into the smaller gas of volume Bubble.

4. gas-liquid-solid three-phase wet method reactor according to claim 3, it is characterised in that in the reaction kettle body (1) Radial direction sieve plate (5) is additionally provided with, the direction of radial direction sieve plate (5) extension is equal with the axis direction of the reaction kettle body (1) OK, and positioned at the top of the aeration head (2)；Multiple sieve apertures are provided with the radial direction sieve plate (5).

5. gas-liquid-solid three-phase wet method reactor according to claim 4, it is characterised in that the one of the radial direction sieve plate (5) Side is attached on the madial wall of the reaction kettle body (1), axis direction of the relative side towards the reaction kettle body (1)；It is described Width between above-mentioned two side of radial direction sieve plate (5) is the 1/15 to 1/10 of radial direction sieve plate (5) inside diameter.

6. gas-liquid-solid three-phase wet method reactor according to claim 4, it is characterised in that the bottom of the radial direction sieve plate (5) The distance between inside bottom surface of side and the reaction kettle body (1) is the 1/15 to 1/7 of the reaction kettle body (1) cavity heights, The distance between the top margin of the radial direction sieve plate (5) and the inside top surface of the reaction kettle body (1) is in the reaction kettle bodies (1) The 1/5 to 3/5 of chamber height.

7. the gas-liquid-solid three-phase wet method reactor according to any one of claim 3 to 6, it is characterised in that described anti- Answer to be additionally provided with kettle (1) and push vane wheel oar (6), the vane wheel oar (6) that pushes is arranged on agitating device (4) and positioned at institute The top of disc turbine oar (3) is stated, the vane wheel oar (6) that pushes can be rotated with the agitating device (4).

8. gas-liquid-solid three-phase wet method reactor according to claim 7, it is characterised in that the agitating device (4) includes The agitating shaft (41) stretched into the reaction kettle body (1)；The aeration head (2) is arranged on the lowermost end of the agitating shaft (41), The disc turbine oar (3) is arranged on 1/10 to 1/7 place of the agitating shaft (41), and the vane wheel oar (6) that pushes is arranged on institute State 1/5 to 1/3 place of agitating shaft (41).

9. the gas-liquid-solid three-phase wet method reactor according to any one of claim 3 to 6, it is characterised in that the stirring Device (4) is hollow shaft-like structure；Gas feed (42) and/or steam inlet are provided with the top of the agitating device (4) (43)。

10. the gas-liquid-solid three-phase wet method reactor according to any one of claim 3 to 6, it is characterised in that described anti- Answer and charging aperture (7), material taking mouth (8), drain hole (9), temperature-measuring port (10), exhaust outlet (11) and/or visor are provided with kettle (1) (12)；Bottom pedal (13), the material taking mouth (8) and/or drain hole (9) position are provided with the bottom of the reaction kettle body (1) In in the region where the bottom pedal (13).