JP3704245B2 - Specific gravity beneficiation method of fine metal and its specific gravity beneficiation equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a specific gravity concentrating method for fine metals and a specific gravity concentrating device using the same, and more specifically, a specific gravity concentrating method and a specific gravity concentrating device for fine metals containing gold and silver grains, which is also known as gold-containing earth and sand ore. It is about.
[0002]
[Prior art and its problems]
[0003]
Gold dust is natural gold that exists alone in earth and sand in addition to general river gold, but natural gold has finer particles than gold dust, and most of them are 1mm or less in micron units, but gold has a specific gravity. However, natural gold has a leaf-like flake shape and is easy to flow into water, and it seems to be due to the surface tension of water, but it has the property of floating in water.
As such means for collecting gold grains and means for concentrating gold grain coarse ore, a table-type beneficiary machine, a collecting means using a spiral type beneficiary machine, and a concentrating means are known.
If you try to process natural gold with the former table-type beneficiation machine (current type water-separation machine: see Japanese Utility Model Publication No. 35-609), (classifier: see Japanese Patent Application Laid-Open No. 55-157345), Most of the flakes float and flow in the fine waves generated in the stock solution due to the vibration of the table, and it is not possible to effectively collect the gold grains and concentrate the gold grains.
In addition, the latter spiral type beneficiator includes a gold dust collecting device (see Japanese Patent Publication No. 40-21601) configured to always flow a clarified liquid into a screw tube. This prior art is a mineral separator using specific gravity and centrifugal force. However, when processing natural gold, most fine particles of 20 microns or more flow due to the high flow rate of the clear liquid, and sedimentation due to specific gravity. The effect and the separation effect by centrifugal force are rare.
As means for solving such a problem, the present applicant has proposed a technique disclosed in Japanese Patent Publication No. 6-26683.
In this prior art, a beneficiation pipe having at least one outward corner is arranged in a zigzag shape from the upper stage to the lower stage of the multistage shelf so that the outward angle part faces downward, and the stock solution is supplied to the beneficiation pipe. The heavy mineral is allowed to settle to the outward corners, and then the washing water is flowed to wash the sediment on the surface of the precipitated concentrate, and then high pressure water is injected to discharge the precipitated concentrate.
By the way, concentrates with high grades such as gold and iron sand have a high specific gravity, so the sedimentation speed is fast, while concentrates with low grades are sandy, have a low specific gravity and a slow sedimentation speed. In the zigzag-shaped beneficiation pipe, many concentrates with higher grades stagnate from the upstream side, and concentrates with higher grades gradually decrease and more concentrates with lower grades stagnate toward the downstream, and the lowest grades are downstream. The concentrate is stagnant.
However, when high-pressure water is injected into the zigzag-shaped beneficiation pipe and the concentrate is recovered, high- and low-grade concentrates are mixed, making separation difficult and cumbersome.
In addition, because of the layout in which all of the multiple beneficiary pipes are arranged in a zigzag shape from the top to the bottom of the multistage shelf as described above, for example, repair, maintenance, and management when a certain beneficiary pipe is clogged with an accident, The complicated piping route of the beneficiation pipe is very difficult and dangerous, and since it is a plurality of zigzag pipes, it takes a lot of production labor and is difficult to provide at low cost.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned conventional circumstances, and its intended processing is also known as a gold-containing earth-and-sand ore, which is efficient in concentration, and can be produced and maintained easily. It is to provide a beneficiation device.
[0005]
[Means for Solving the Problems]
The technical means taken in order to solve the above-mentioned object is to prepare a beneficiation pipe in which a plurality of beneficiation pipes having at least one outward angle part over the entire inner surface in the pipe are arranged in parallel with the outward angle part facing downward. A plurality of units are configured, and each of the beneficiation units is arranged in a stepped manner with a slight gradient. The connecting portion of each of the beneficiation units is flown to the uppermost beneficiation unit, and the heavy mineral is supplied to each of the beneficiation units. Each time when sinking to the outward corner, and when washing the sediment on the concentrate surface of each beneficiation unit that flows by washing water flowing into the uppermost beneficiation unit, and when high pressure water is injected separately for each selection unit The gist is that the concentrate is disconnected so that the concentrate can be discharged and collected separately from the bottom of the selection unit, and the high-pressure water is injected into each selection unit at a time lag from the order of the upper selection unit. To do.
And the connection part of Claim 1 is the structure which has arrange | positioned the connection pipe for stock solutions which equipped the water receiving part located in the front-end | tip directly in the lower part of the beneficiation pipe in the upper stage beneficiation unit at the upper end of the beneficiation pipe in the lower stage beneficiation unit Is preferable.
In addition, it is also effective in the case of further comprising a recovery means for receiving the concentrate discharged from the lower end of the beneficiation unit so as to cross the upper portion of the water receiving unit together with the high pressure water described in claim 2.
An apparatus for concretely carrying out the above method is that a plurality of ore beneficiation pipes having at least one outward corner along the entire inner length of the inside of the pipe are arranged in parallel with the outward corner being directed downward. and a plurality of configurations, arranged terraced shape each beneficiation unit has a slight slope, solution feed means beneficiation unit of the uppermost stage, high-pressure water supply means for each concentrator unit with communicating the cleaning water supply means The connecting section of each beneficiation unit is predetermined at the position in front of the lower end of the beneficiation pipe in each beneficiation unit, and the connection pipe for stock solution in which the water receiving part at the tip is arranged immediately below the lower end of the beneficiation pipe in the upper beneficiation unit. And collecting means for receiving the concentrate discharged by the pressure of the high-pressure water, and the undiluted solution connection pipe is disposed at the upper end of the beneficiation pipe in the lower-stage beneficiation unit. To.
[0006]
(Operation) According to the above technical means, the following operation is provided.
When the stock solution is flowed from the uppermost processing unit to the lower processing unit, the heavy minerals that settle from the stock solution stagnate in the downward outward corners of the processing pipes that make up each processing unit.
Concentrates with high grades such as gold and iron sand have high specific gravity and fast sedimentation speed. Therefore, the amount of stagnation decreases as it goes from the uppermost processing unit to the lower processing unit, and the sandy concentrate with the lowest grade mainly settles and stays at the lower level.
Then, wash water is poured to wash the sediment on the surface of the settled concentrate, and it is discharged from the lower end of the lowest unit.
Completion of washing off the earth and sand starts from the top concentration unit, and the final removal of the earth and sand from the bottom concentration unit ends. And if we waited for the completion of the washing of all the beneficiation units, the concentrate of the higher grade falls to the lower beneficiation unit side where the lower grade concentrate stays due to the influence of the gradient of the beneficiation unit. There is a possibility that the beneficiation cycle cannot be improved.
To prevent it, the order time lag from the upper row of the wash-off completion of sediment is completed in a state in which concentrate separately from the lower end of each SenHiroshi unit is a non-contact Kakusen Hiroshi unit to allow the discharge recovery Then, the high-pressure water is poured into the concentrate, and the stagnation concentrate is discharged from the lower end of the concentrate and collected for each of the beneficiation units. This makes it possible to collect concentrates by grade.
This process is repeated sequentially.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a specific gravity beneficiation apparatus for carrying out the specific gravity beneficiation method of the fine metal of the present invention, and symbol A is the specific gravity beneficiation apparatus.
[0008]
This specific gravity separation apparatus A is provided with a plurality of beneficiation units 1 composed of a plurality of beneficiation pipes 11.
[0009]
This mineral processing unit 1 shows the case where four mineral processing pipes 11 are arranged in parallel in this embodiment, and each mineral processing pipe 11 has, for example, a square shape, an angular waveform, a perfect circle, a non-true circle, etc. as shown in FIG. It is formed in an external shape having at least one outward corner portion 11a, and is attached to the support base 21 at an appropriate interval in a parallel shape, that is, in the shape of a river, with the outward corner portion 11a facing downward. .
[0010]
This beneficiation unit 1 is a long unit having a length of several tens of meters, and uses a flat land, an inclined land, etc., and has a slight gradient (2% in the present embodiment) in a stepwise manner. The long ore beneficiation function unit 1A is arranged.
[0011]
The stock solution supply means 2 may be directly supplied from the stock solution tank, but in this embodiment, as shown in FIGS. 1 to 3, the mining industry is composed of a concrete mixer 12, a concrete pump 22, a sealed mixing chamber 32, and the like. The raw ore press-fitting slurrying equipment is used.
[0012]
The sealed mixing chamber 32 has a height selected from a range of about 5 to 100 cm and has a desorption lid 32a as shown in FIG. Is secured.
The sealed mixing chamber 32 has two material pressure inlets 32b and 32c. One is a material pressure inlet 32b for raw ore and the other is a material pressure inlet 32c for water. The material pressure inlet 32b is made larger in diameter than the material pressure inlet 32c for water. The reason why the inner diameters of the material pressure inlets 32b and 32c are made different from each other is that the soft ore pressed into the inside from the large diameter material pressure inlet 32b explodes into the inside from the small diameter material pressure inlet 32c. This is because the water is efficiently dissolved and slurried, and the washing water supply means 3 including the water pipe 13, the pump 23, and the water tank 33 is connected to the water material pressure inlet 32c.
Further, a sieve 32d is installed in the vicinity of the bottom of the sealed mixing chamber 32, and even if stones, rakes, dust, and insects get mixed into the original ore, it is sorted there, and these foreign substances are put into the beneficiation function section. Do not run down. Reference numeral 32e denotes a discharge unit.
[0013]
The concrete mixer 12 is a relatively soft material having about 30% moisture by supplying primary processed ore (the raw ore obtained by mining, washed with water, selected by a 10 mesh sieve and subjected to primary processing). Kneaded earth and sand are fed into the concrete pump 22 via the hopper 22a.
[0014]
The concrete pump 22 pressure-feeds the kneaded earth and sand to the closed mixing chamber 32 and press-fits into the closed mixing chamber 32 from the material pressure inlet 32b.
[0015]
In the closed mixing chamber 32, the relatively soft dough-like soil that has been press-fitted is easily dissolved and slurried with water that spills out vigorously, and the stock solution slurried through the discharge section is discharged from the top-stage beneficiation unit 1. Let it flow down.
[0016]
Reference numeral 5 denotes a stock solution pipe for letting the stock solution flow down from the discharge part 32e of the closed mixing chamber 32 to the top-stage mineral processing unit 1, and as shown in FIG. Has been.
Connected to the undiluted solution pipe 5 portion above the branch portion is a high-pressure water pipe 24 connected to the high-pressure water tank 14, and the high-pressure water pipe 24 is provided with an electromagnetic valve 6 and a check valve 7. In addition, a check valve 7 is installed in each portion of the stock solution pipe 5 upstream of the connection with the high-pressure water pipe 24. The high-pressure water pipe 24, the high-pressure water tank 14, the pump 34, etc. The supply means 4 is comprised.
[0017]
As shown in FIG. 1, the connecting section 8 of each of the beneficiation units 1 is connected to the stock solution having a water receiving part 18 a that is located immediately below the lower end of the beneficiation pipe 11... A pipe 18 and a beneficiation pipe 11 in each of the beneficiation units 1 are provided at a position in front of the lower end with a predetermined interval, and are provided with a recovery means 28 for receiving the concentrate discharged by the pressure of the high-pressure water.
[0018]
Specifically, as shown in FIG. 1, a base 200 having a hollow interior is installed at the start end portion of the installation ground 100 of each mineral processing unit 1, and the mineral processing pipe 11 in the upper mineral processing unit 1 is positioned just below the lower end. The stock solution connecting pipe 18 that supports the water portion 18a with the gantry 200 and connects the upper end to the water receiving portion 18a is branched at the lower end in the same manner as the stock solution pipe 5 so that the beneficiation pipe 11 in the lower concentration unit 1. Further, the recovery means 28 made of a container is installed on the gantry 200 with a predetermined interval X in front of the beneficiation pipe 11 in the upper stage of the beneficiation unit 1.
The connection of the high water pressure pipe 24 and the layout of the electromagnetic valve 6 and the check valve 7 to the stock solution connecting pipe 18 are the same as those of the stock solution pipe 5.
[0019]
That is, the undiluted solution flowing down from the discharge part 32e of the closed mixing chamber 32 through the undiluted pipe 5 passes through the water receiving section 18a and the undiluted solution connecting pipe 18 from the lower end of the beneficiation pipe 11 in the uppermost beneficiation unit 1. flows into the next stage of the mineral processing unit 1, and it repeatedly for each SenHiroshi unit 1 disseminating beneficiation tube 11 ... concentrate until the beneficiation unit 1 of the lowest stage.
The washing water is made to flow down through a similar route.
[0020]
On the other hand, setting the space X to a predetermined, when supplying high-pressure water by opening the electromagnetic valve 6 to the mineral processing unit 1, a stagnation product that precipitated stagnant beneficiation tube 11 ... in each beneficiation unit 1, It becomes possible to push out to the storage box which is the collecting means 28 across the water receiving portion 18a.
The setting of the space X can be determined by high pressure water pressure.
[0021]
The beneficiation pipe 11 in the lowest-stage beneficiation unit 1 is installed in front of the lower end with the recovery means 28 supported by a gantry 200 at a predetermined interval X, and the wash water receiving tank 9 is also disposed in the same beneficiation unit. Tube 11 is provided just below the lower end.
[0022]
In the present embodiment, a case is shown in which the beneficiation function unit 1A is configured by a three-stage beneficiation unit 1, and a guide cylinder 28a is provided so that push-out items can be reliably collected in the collection box as the collection means 28. The recovery box can be moved by a caster 28b, and is provided with a float-type drain valve so that moisture can always be drained by a drain pipe 28c.
[0023]
Next, the specific gravity beneficiation method using the present embodiment will be described. First, the soft ore is fed into the sealed mixing chamber 32 through the concrete mixer 12 and the concrete pump 22 and simultaneously pumped up by the washing water supply means 3. Water is discharged from the material pressure inlet 32c to make the ore into a slurry, and the undiluted solution is distributed to each beneficiation unit (three-stage beneficiation unit) 1 through the undiluted solution pipe 5, the water receiving portion 18a, and the undiluted solution connecting pipe 18. Make it.
Concentrates with high grades such as gold and iron sand have a high specific gravity and a fast sedimentation speed. The stagnation amount of concentrates with higher grades decreases from the top-stage concentrate unit 1 to the lower-stage concentrate unit 1, The sandy concentrate with the lowest grade is mainly settled and stagnates.
Then, the operation of the concrete mixer 12 and the concrete pump 22 is stopped, the operation of only the cleaning water supply means 3 is continued, and the cleaning water (water) is poured from the sealed mixing chamber 32 through the same route as the raw solution, and each of the beneficiation units 1 Washing water is received in the water receiving tank 9 from the lower end of the beneficiation pipe 11 in the mineral processing unit 1 at the lowermost stage while washing away the sediment on the surface of the concentrate.
As shown in FIG. 4, the concentrate concentrates at the downward outward angle portion 11a in each of the beneficiation pipes 11 as shown in FIG.
Completion of the cleaning starts from the uppermost beneficiation unit 1 and the lowermost beneficiation unit 1 ends.
Correspondingly, the solenoid valve 6 connected to the top-stage beneficiation unit 1 is opened to inject high-pressure water, and the concentrate that has settled at that stage is pushed out from the lower end of the beneficiation pipe 11 and the guide cylinder It collects in the collection box 28 from 28a.
This push-out is performed with a time difference for each stage in accordance with the completion of cleaning of each stage.
This series of steps is defined as one cycle.
[0024]
According to the results of experiments with gold-bearing earth and sand mines, grade 1 concentrates are available in the first stage, unit 2 grades in the second stage, and third grade units. Then, grade 3 concentrate is mainly recovered.
Assuming 100% of the gold collected in all stages, it was 86% in the first stage beneficiation unit, 5% in the second stage beneficiation unit, and 9% in the third stage beneficiation unit. I understand.
[0025]
In the present embodiment, the connecting portion 8 has a water receiving portion 18a that is located at the tip and is located immediately below the lower end of the beneficiation pipe 11 in the upper concentration unit 1. And a beneficiation pipe 11 in each of the beneficiation units 1... Are disposed at a predetermined interval X at a position in front of the lower end, and have a recovery means 28 for receiving the concentrate discharged by the pressure of the high-pressure water. For example, make the lower end of the upstream beneficiation pipe flexible and connect it to the downstream beneficiation pipe using the flexibility at the time of flowing stock solution and washing water. For example, the connection is released and the flexible means is used to connect the collecting means. Be free.
[0026]
【The invention's effect】
As described above, according to the present invention, when the stock solution on the surface of the concentrate is washed by flowing the stock solution to the uppermost beneficiation unit and sinking heavy minerals to the outward corners of each beneficiation unit and then flowing wash water. When the dredging unit is connected and then high pressure water is injected into each step, each step is disconnected so that concentrate can be discharged and collected separately from the bottom of each step. This is a specific gravity separation method that is effective for recovering concentrate in each stage, so-called grades. In particular, because it settles in the uppermost beneficiation unit, it enables highly efficient recovery of gold without bothering the sorting work.
In addition, since it is collected in each stage without waiting for all the stages to be cleaned cleanly, the supply (sink) of the stock solution to the beneficiation unit such as the uppermost stage and the beneficiation unit such as the lowermost stage. It is also possible to carry out the cleaning together with the cleaning, eliminating waste of the beneficiation time and performing efficient beneficiation.
In addition, the specific gravity separator has a flat shape in which the mineral processing units are arranged in steps with a slight gradient, and all of the multiple mineral processing pipes are piped in a zigzag shape from the upper stage to the lower stage of the multistage shelf. For example, repairing, maintaining, and managing a beneficiation pipe that is clogged with an accident, such as the prior art described above, becomes very difficult due to the influence of the complicated piping route of the beneficiation pipe, and is injured. It is possible to solve various problems such as increased equipment costs due to the cost.
In addition, the connecting part of each stage is located at the tip at a predetermined interval at the front end of the beneficiation pipe at each of the beneficiation units, and the undiluted pipe connecting pipe for the stock solution having a water receiving part located immediately below the lower end of the beneficiation pipe in the upper beneficiation unit. And the recovery means that receives the concentrate discharged so as to cross over the water receiving part with the pressure of the high-pressure water, and is controlled by a mechanical element structure or electrical structure. Compared to the case, the specific gravity concentrating device is simpler in structure, less in failure, and superior in durability.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a side view of a specific gravity concentrator for carrying out the specific gravity beneficiation method of this fine metal, with the middle omitted and partially cut away.
FIG. 2 is a partially cutaway view in the same plan view.
FIG. 3 shows a closed mixing chamber, (a) is shown partially cut away in an enlarged front view. (B) is the (A)-(A) line expanded sectional view.
FIG. 4 is an enlarged sectional view taken along line (B)-(B) of FIG.
[Explanation of symbols]
A: Specific gravity concentrator 1: Concentration unit 11: Concentration pipe 11a: Outward angle section 8: Communication section 18a: Receiving section 18: Concentration pipe connection pipe 28: Recovery means 2: Stock solution supply means 3: Wash water supply means 4: High pressure water supply means

Claims (4)

A plurality of beneficiation units in which a plurality of beneficiation pipes having at least one outward angle part along the entire inner length of the pipe are arranged in parallel with the outward angle part facing downward, and each beneficiation unit is slightly inclined. The connecting section of each beneficiation unit is flown into the uppermost beneficiation unit and the heavy mineral is allowed to sink to the outward corner of each beneficiation unit. Contact when cleaning the sediment on the surface of each concentrate unit that sinks with wash water, and when high-pressure water is injected into each selected unit, concentrate can be discharged and collected separately from the bottom of each selected unit. In this way, the high-pressure water is injected into each selection unit at a time lag from the order of the upper unit, so that the specific gravity selection method for fine metal is characterized. The said connection part has arrange | positioned the connection pipe for stock solutions which equipped the water receiving part located in the front-end | tip directly in the lower part of the beneficiation pipe in the upper stage beneficiation unit at the upper end of the beneficiation pipe in a lower beneficiation unit. Item 2. A specific gravity beneficiation method for fine metal according to Item 1. The specific gravity ore concentration method for fine metal according to claim 2, further comprising a recovery means for catching the concentrate discharged from the lower end of the beneficiation unit so as to cross the upper part of the water receiving part together with the high-pressure water. The beneficiation tube having at least one of the outward corner over the inner surface the entire length of the tube, the outward corner and a plurality of constituting a plurality body parallel to beneficiation unit in a state of facing downward and slightly to the beneficiation unit It is arranged in a stepped manner with a gradient, and communicates stock solution supply means and washing water supply means to the top-stage beneficiation unit, and also provides high-pressure water supply means for each beneficiation unit so that each beneficiation unit can communicate. Are arranged at a predetermined interval at a position in front of the lower end of the beneficiation pipe in each of the beneficiation units, and a connecting pipe for the undiluted solution in which the water receiving part at the tip is arranged immediately below the lower end of the beneficiation pipe in the upper beneficiation unit. And a recovery means for receiving the concentrate discharged at a pressure of 1 to 5, wherein the concentrate connecting pipe is disposed at the upper end of the beneficiation pipe in the lower beneficiation unit.

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