JPS6216179Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a powder slurrying device for slurrying powder, for example, dust in the form of powder produced during smelting using copper concentrate as a raw material.

As is well known, when copper concentrate is used as a raw material for smelting, components with higher vapor pressure than copper, such as Zn and PB, migrate from the furnace into the exhaust gas and are collected as dust by a dust collector. In addition to the above, dust also includes
It contains useful metals such as Cu, and it is advantageous to process them through a hydrometallurgical process to recover them. For this purpose, first, it is necessary to turn the dust, which is a fine powder, into a slurry.

Incidentally, this type of powder is generally made into a slurry in the following manner. In other words, using a slurry forming device that has a tank into which a certain amount of water is poured and a metering feeder that supplies a certain amount of powder as dust to the tank, the discharged powder as dust is mixed with water. It is mixed to form a slurry. By the way, in this type of conventional slurry making equipment, powder tends to clog at the outlet of the metering feeder, requiring maintenance each time, making slurry making work impossible for a long time, and
Not only is the powder released between the quantitative feeder and the tank to the outside of the slurry equipment, contaminating the work environment, but the unslurried powder that does not blend with the water in the tank becomes spherical and forms a mold on the water surface. This has been a hindrance to improving the efficiency of slurry-forming work, since it significantly hinders the slurry-forming of the powder that has grown and is further supplied.

This invention was created in view of the above points, namely, this invention prevents the powder from clogging while being supplied, prevents the powder from being released to the outside at all, and furthermore, prevents the powder from being discharged outside. To collect powder to be made into a slurry and make it into a slurry so as not to hinder the making of the supplied powder into a slurry, so as to be able to operate without maintenance for a long time and to significantly improve slurry making work efficiency. The purpose of the present invention is to provide a powder slurry-forming device that is capable of slurrying powder.

Therefore, in order to achieve this object, the powder slurrying apparatus of the present invention includes a vertical chute provided close to a hopper, and an inclined chute provided between the hopper and the vertical chute, and a vibrator device for processing the powder. an oblique chute that is vibrating freely and guides the powder discharged from the hopper to a vertical chute; a puncher that is movable reciprocatingly within the inner wall of the vertical chute to remove the powder stuck to the inner wall; a slurry mixer having at least a wet inner wall tube for receiving the powder falling through the vertical chute in a wet state with the slurry liquid, and a stirring blade for mixing the powder and the slurry liquid; and the wet inner wall. An overflow weir and a slurry liquid supply device for forming a uniform liquid film of the slurry liquid on the inner wall of the cylinder, and for transferring the mixed slurry from the slurry mixer to a slurry storage tank having an agitator. a sealed trough, a spray nozzle tube that collects unslurried escaped powder and turns it into slurry;
The slurry forming system from the hopper to the spray nozzle cylinder is characterized by a structure that is sealed from the outside.

This invention will be explained below with reference to an illustrated embodiment.

FIG. 1 shows a powder slurrying device 1 according to this invention, and this slurrying device 1 receives powder M as dust from a smelting device (not shown) and a dust collector (not shown). ) is provided at a lower position of the eccentric hopper H that is supplied through the hopper H.

First, to explain this eccentric hopper H,
Although not shown, the eccentric hopper H has either a vibrator, an air blow device, or a vibrator and an air blow device for dropping the powder M from hanging on a shelf, and also has one of the opposing hopper inclined surfaces H ₁ and H ₂ . The slope H ₁ is the other slope
The slope is steeper than that of _H2 , so that the powder M supplied into the eccentric hopper H can be smoothly supplied to the slurry forming device 1 below without clogging. Further, a quantitative supply device F for powder M having an opening/closing shutter S for discharging a fixed amount of powder M in the eccentric hopper H to the slurry forming device 1 is attached to the lower opening of the eccentric hopper H. There is.

Next, the slurry forming apparatus 1 will be explained in detail. As shown in FIG. 2, this slurry forming apparatus 1 includes a cylindrical vertical chute 2 held close to the bottom of the eccentric hopper H, and a slanted vertical chute 2 between the vertical chute 2 and the auto feeder F. an oblique chute 3 which is attached to the vertical chute 2 and guides the powder M discharged from the eccentric hopper H from the hopper H and the auto feeder F side to the vertical chute 2; A puncher 4 for removing dirt from the powder M, and water as a liquid for slurrying the powder M.
A slurry-forming mixer 7 has a wet inner wall cylinder 5 in which Lw flows forming a water film LF, and receives the powder M falling from the vertical chute 2 and mixes the powder M and water Lw with a stirring blade 6; , an overflow weir 8 for forming a uniform water film LF on the inner wall of the wet inner wall cylinder 5, and a water supply device 9 as a slurry liquid supply device;
a closed trough 11 for transferring the mixed slurry from the slurry mixer 7 to a slurry storage tank 10 having an agitator (not shown); and the slurry storage tank 1.
The slurry forming system as a whole from this hopper H to the spray nozzle tube 12 is connected to the outside. It has a closed structure.

The vertical chute 2 has its axial direction set in the vertical direction, and a double-acting cylinder 13 as an actuator for reciprocating operation of the puncher 4 is attached to the upper end surface.
3, the puncher 4 is slid from the upper end to the lower end of the inner circumferential wall 2a. In addition, a vibrator device 14 is installed in the middle of the diagonal chute 3 to prevent clogging of the powder and feed it smoothly, and a vibrator device 14 is attached to the lower end of the diagonal chute 3 and a vibrator device 14 that branches from the middle of the vertical chute 2. It is connected via a bellows 15 to a connecting pipe 2b provided diagonally above.

Next, as shown in FIG. 3, the water supply device 9 includes a storage container 16 provided along the entire circumference of the overflow weir 8, and a water storage space 16a consisting of the storage container 16 and the overflow weir 8. It has a water distribution pipe 17 installed along the entire circumference of the overflow weir 8, and the supply pipe 17 with a downward opening 17a is opened by the operation of an external water supply pump (not shown). Water is constantly and slowly supplied to the accommodation space 16a through the container. Further, the overflow weir 8 is formed continuously at the upper end of the wetted inner wall 5 of the slurry mixer 7, and has a truss shape whose upper side is wider than the diameter of the wetted inner wall 5.

Further, the spray nozzle tube 12 has a lower open end 12a connected to the upper end surface of the slurry storage tank 10, a lid 12c attached to the upper open end 12b, and a lower open end 12a connected to the upper end surface of the slurry storage tank 10.
Connection opening 12d formed on the outer peripheral surface closer to 2b
is connected to the accommodation space 16a of the accommodation container 16. The unslurried escaped powder that has escaped from the slurry storage tank 10 into the spray nozzle tube 12 is located at two upper and lower locations in the spray nozzle tube 12.
Spray nozzles 18 and 19 are provided for spraying water onto the MB to form a slurry.

Note that the lower edge position of the connection opening 12d is located at the third
As shown in the figure, the height is h from the upper edge of the overflow weir 8.
is set high.

Next, the operation of the above configuration will be explained.

When a certain amount of the powder M in the eccentric hopper H is discharged to the diagonal chute 3 side by opening the shutter S, the shutter S is closed and the discharge of the powder M is stopped. The discharged powder M enters the vertical chute 2 through the diagonal chute 3 vibrated by the vibrator device 14, as shown in FIG. 2, and reaches the wetted inner wall 5 of the slurry mixer 17. At this time, since the diagonal chute 3 is vibrated, the powder M
The powder M is smoothly sent to the vertical chute 2 without clogging, and the powder M adhering to the inner circumferential wall 2a of the vertical chute 2 is dropped by the vertical movement of the puncher 4, so that the powder M is transferred into the diagonal chute 3 and the vertical chute 2. All of the slurry is dropped into the slurry mixer 7 without leaving any residue.

On the other hand, as shown in FIG. 3, water is slowly supplied to the accommodation space 16a of the water supply device 9 from the opening 17a of the supply pipe 17, and the water overflows the overflow weir 8 and the wet inner wall tube. A uniform water film LF is formed on the inner wall of 5.

The powder M that has reached the wet inner wall 5 is covered with a water film.
At the same time, adhesion is prevented by the LF, and the slurry is blended with water and mixed by the stirring blade 6 to form a mixed slurry, which is led to the slurry storage tank 10 through the closed trough 11 and stirred. At this time, in the closed trough 11, the tube is not blocked by the lump-like slurry.

In this way, a certain amount of powder M discharged from the eccentric hopper H is all sent to the slurry storage tank 10 and stirred, but not all of the powder M is necessarily turned into a slurry. 10, as shown in FIG. 3, there are slurry MG that has been turned into a slurry and, for example, dumpling-shaped escape powder MB that has not been turned into a slurry.

Therefore, due to the pressure of the slurry MG and non-slurry escaping powder that are sequentially sent from the slurry mixer 7, only the non-slurry escaping powder MB rises inside the spray nozzle cylinder 12 and is collected. The unslurried escape powder M that has been collected is sprayed with water by spray nozzles 18 and 19 to be completely slurried.

Therefore, no lump-like lumps, for example, are observed in the series of circulation system, that is, the system from the slurry mixer 7, the slurry storage tank 10, and the spray nozzle pipe 12 to the overflow weir 8.

Also, from the eccentric hopper H to the spray nozzle tube 12
Since the slurry system leading to the above is sealed from the outside, there is no risk of harmful powder M coming out.

Note that the slurry-forming liquid is not limited to water, but other liquids that are compatible with the powder M can also be used. In addition, the resulting slurry of powder M is later wet-processed to separate useful metals, and powders of calcium carbonate and slaked lime are used as neutralizing agents for the sulfuric acid used at that time. The slurry making device of this invention can also be applied when making a body slurry.

As explained above, according to this invention, while the powder discharged from the hopper is guided to the slurry mixer by the diagonal chute and the vertical chute, the diagonal chute is used to prevent the powder from clogging in both chute. A vibrator device is attached to the vertical chute for excitation, and a puncher is installed on the vertical chute to remove powder buildup from the inner wall.The inner wall cylinder of the slurry mixer is equipped with an overflow weir and a slurry liquid supply device. The powder is kept wet with the slurry liquid by the vertical chute and the powder is received from the vertical chute, and the slurry liquid and the powder are mixed by the stirring blade to form a mixed slurry. The powder is guided through a sealed trough to a slurry storage tank, and the unslurried escaped powder is turned into a slurry in a spray nozzle tube, and the slurry system from the hopper to the spray nozzle tube is sealed from the outside. Because of this structure, there is no need to worry about contaminating the working environment as the powder does not get clogged while being supplied and no powder is released to the outside, and it also collects powder that has not been turned into a slurry. Since it is made into a slurry, all the powder supplied from the hopper can be completely made into slurry, and there is no risk of interfering with the slurrying of the supplied powder. This has the effect of significantly improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the entire powder slurrying device according to this invention, Fig. 2 is an enlarged sectional view of the same slurrying device, and Fig. 3 is a slurry mixing machine and a spray nozzle tube. FIG. 1... Slurrying device, 2... Vertical chute,
H...Eccentric hopper, 3...Diagonal shoot, 4...
puncher, 5... wet inner wall cylinder, 6... stirring blade,
7... Slurry mixer, 8... Overflow weir as an overflow weir, 9... Water supply device as a slurry liquid supply device, 10... Slurry storage tank, 11... Sealed trough, 12... Spray nozzle Tube, MB...
Non-slurry escaped powder, M...powder.

Claims (1)

[Scope of utility model registration request] a vertical chute provided close to the hopper;
A diagonal chute is provided at an angle between the hopper and the vertical chute and is vibrated by a vibrator device to guide the powder discharged from the hopper to the vertical chute, and a diagonal chute is movable back and forth within the inner wall of the vertical chute. a puncher for removing powder build-up from the inner wall; a wet inner wall cylinder for receiving the powder falling through the vertical chute while wet with the powder slurrying liquid; and a wet inner wall tube for receiving the powder and the slurrying liquid. A slurry-forming mixer having at least a stirring blade for mixing, an overflow weir and a slurry-forming liquid supply device for forming a uniform liquid film of the slurry-forming liquid on the inner wall of the wet inner wall tube, and the slurry-forming liquid supply device. It consists of a sealed trough for transferring the mixed slurry from the mixing mixer to a slurry storage tank equipped with an agitator, and a spray nozzle tube for collecting unslurried escaped powder and turning it into slurry, and spraying from the hopper. A powder slurrying device characterized in that the slurrying system up to the nozzle tube is configured to be sealed from the outside.