CN109622197A - A kind of beneficiation method and device of gold raw ore - Google Patents
A kind of beneficiation method and device of gold raw ore Download PDFInfo
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- CN109622197A CN109622197A CN201910095790.9A CN201910095790A CN109622197A CN 109622197 A CN109622197 A CN 109622197A CN 201910095790 A CN201910095790 A CN 201910095790A CN 109622197 A CN109622197 A CN 109622197A
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 40
- 239000010931 gold Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000000227 grinding Methods 0.000 claims abstract description 233
- 239000000843 powder Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000005188 flotation Methods 0.000 claims description 30
- 239000012141 concentrate Substances 0.000 claims description 20
- 230000000694 effects Effects 0.000 abstract description 18
- 238000011084 recovery Methods 0.000 abstract description 14
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 241000196324 Embryophyta Species 0.000 description 58
- 239000002002 slurry Substances 0.000 description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910000754 Wrought iron Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241001609368 Acamptopappus Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- -1 cyanogen Compound Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N glycolonitrile Natural products N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical compound Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000005456 ore beneficiation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses the beneficiation methods and device of a kind of golden raw ore, are related to the technical field of beneficiation method.The following steps are included: raw ore obtains ore by crushing operation；It is passed through ore to level-one ore grinding device, miberal powder adds water and stirs evenly；Ore pulp 1 is passed through level-one clasfficiator to be classified to obtain ore pulp 2 and level-one underflow ore pulp 3, level-one underflow ore pulp 31 returns to first time grinding operation, and level-one underflow ore pulp 32 is passed through second level ore grinding device and carries out ore grinding；Level-one underflow ore pulp 32 is passed through to second level ore grinding device；Ore pulp 2 and ore pulp 4 are passed through second level clasfficiator to be classified to obtain ore pulp 5 and second level underflow ore pulp 6, second level underflow ore pulp 6 is returned into second of grinding operation.A kind of beneficiation method of gold raw ore described in the present embodiment, the load and energy consumption of level-one ore grinding device are reduced, meanwhile, by the load for increasing second level ore grinding device in right amount, the fineness for the ore pulp for obtaining ore grinding is smaller, and then has reached the technical effect for improving recovery rate in ore-dressing.
Description
Technical field
The present invention relates to the technical field of beneficiation method more particularly to a kind of beneficiation methods and device of golden raw ore.
Background technique
Gold is a kind of noble metal, and golden simple substance is solid, density height, soft, bright, anticorrosive, malleability at room temperature
It is highest in known metal.Gold and most of chemicals will not all chemically react, but can be by chlorine, fluorine, chloroazotic acid and cyanogen
Compound corrodes.Gold can be dissolved by mercury, and the nitric acid that can dissolve silver and base metal cannot dissolve gold.
The ore-dressing technique of quartz vein gold mine is mainly passed through by floatation process obtains Gold Concentrate under Normal Pressure from raw ore at present, into
It before entering floatation process, needs first to be crushed raw ore, the process flow of ore grinding and classification, existing process flow is main
Be raw ore is carried out it is broken form ore, then be classified by ore grinding twice and twice and obtain the ore pulp of ideal fineness, due to by
The influence of ore nature, existing process flow, can be by whole bottoms after first order grinding attachment carries out ore grinding to ore
It flows ore pulp to return in first order grinding attachment, the load of first order grinding attachment is caused to increase, to reduce first order mill
The working efficiency of mine equipment, also, the fineness for also resulting in the ore pulp that first order grinding attachment is ground is insufficient, and then influences subsequent
Process flow.
Summary of the invention
In view of this, the embodiment of the present invention provides the beneficiation method and device of a kind of golden raw ore, main purpose is to provide one
The beneficiation method and device that kind can propose the fineness for grinding high raw ore substantially increases the classification efficiency and raw ore of grading technology
Ore milling concentration, and energy consumption is reduced, reduce the production cost of enterprise.
In order to achieve the above objectives, present invention generally provides following technical solutions:
On the one hand, the embodiment of the invention provides a kind of beneficiation methods of golden raw ore, this method comprises:
(1) earlier machine: raw ore obtains ore by crushing operation；
(2) first time grinding operation is passed through ore to level-one ore grinding device, obtains miberal powder, and miberal powder adds water and stirs evenly,
Obtain ore pulp 1；Wherein, level-one ore grinding device should make miberal powder content of the fineness less than 0.074mm reach 50% or more；
(3) first time graded operation: ore pulp 1 is passed through level-one clasfficiator and is classified to obtain ore pulp 2 and level-one underflow mine
Slurry 3, level-one underflow ore pulp 3 is divided for level-one underflow ore pulp 31 and level-one underflow ore pulp 32, wherein level-one underflow ore pulp 31 accounts for one
The mass fraction of grade underflow ore pulp 3 is 65% to 75%, and the mass fraction that level-one underflow ore pulp 32 accounts for level-one underflow ore pulp 3 is
25% to 35%, level-one underflow ore pulp 31 return first time grinding operation, level-one underflow ore pulp 32 be passed through second level ore grinding device into
Row ore grinding；
(4) second of grinding operation are passed through level-one underflow ore pulp 32 to second level ore grinding device, obtain ore pulp 4；Wherein, two
Grade ore grinding device should make miberal powder content of the fineness less than 0.074mm reach 65% or more；
(5) second of graded operation: ore pulp 2 and ore pulp 4 are passed through second level clasfficiator and are classified to obtain ore pulp 5 and second level
Second level underflow ore pulp 6 is returned to second of grinding operation by underflow ore pulp 6；
(6) flotation operation: ore pulp 5 is passed through flotation circuit and carries out flotation, obtains Gold Concentrate under Normal Pressure.
Further, in the step (3), the mass fraction that level-one underflow ore pulp 31 accounts for level-one underflow ore pulp 3 is 70%,
The mass fraction that level-one underflow ore pulp 32 accounts for level-one underflow ore pulp 3 is 30%.
Further, in the step (1), the mass concentration of ore pulp 1 is 45%.
Further, in the step (6), the grinding fineness of ore pulp 5 is that -200 mesh account for 93%.
On the other hand, the embodiment of the present invention also provides a kind of ore-dressing plant of golden raw ore, which includes:
Crushing device, the crushing device generate ore for being crushed raw ore；
Ore grinding device, the ore grinding device include the first ore grinding device and the second ore grinding device, the first ore grinding device
It is connected to the crushing device, for ore to be carried out ore grinding, and generates ore pulp；
Classification mechanism, the classification mechanism go out including the first grading plant, the second grading plant, the first feed pipe, first
Expects pipe, the second discharge nozzle and third discharge nozzle, the both ends of first feed pipe be connected to the first ore grinding device and
First grading plant, for by the pulp conveying in the first ore grinding device to first grading plant, described
The both ends of one discharge nozzle are connected to the first ore grinding device and first grading plant, are used for part underflow ore pulp
It is delivered to the first ore grinding device, the both ends of second discharge nozzle are connected to first grading plant and described
Two ore grinding devices, for distinguishing the both ends of part underflow pulp conveying to the second ore grinding device, the third discharge nozzle
It is connected to first grading plant and second grading plant, the overflow pulp for generating first grading plant
It is delivered to the second grading plant.
Further, the diameter of first discharge nozzle is greater than the diameter of second discharge nozzle.
Further, return pipe, one end of the return pipe are connected to the second ore grinding device, and the other end is connected to institute
The second grading plant is stated, the pulp conveying for generating the second ore grinding device to second grading plant.
Further, flotation unit, the flotation unit is connected to second grading plant, for receiving described second
The overflow pulp that grading plant generates.
First grading plant and second grading plant are cyclone.
Compared with prior art, the present invention has the following technical effect that
1, beneficiation method of the present invention has ore grinding processing twice can be by whole underflows after conventional first time ore grinding
Ore pulp returns in first order grinding attachment, and the present invention is ground after first time ore grinding, by the underflow ore pulp of part back to level-one
In mine device, the underflow ore pulp of another part enters second level ore grinding device, reduces the load of level-one ore grinding device, also, drop
The low energy consumption of level-one ore grinding device.
2, beneficiation method of the present invention, second level ore grinding device first carry out ore grinding to part underflow ore pulp, make secondary grinding
The slurry fineness that mine device is ground is smaller, is conducive to subsequent graded operation.
3, the fineness of beneficiation method of the present invention, the ore pulp obtained by ore grinding is smaller, to make gold concentrate grade
It improves, and then has reached the technical effect for improving recovery rate in ore-dressing.
Detailed description of the invention
Fig. 1 is a kind of beneficiation method flow chart of golden raw ore provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of the ore-dressing plant of golden raw ore provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
In order to which the present invention is further explained it is a kind of gold raw ore beneficiation method, reach expected goal of the invention, below in conjunction with compared with
Good embodiment, to a kind of beneficiation method of low-grade vulcanized lead mine proposed according to the present invention, specific embodiment, structure,
Feature and its effect, detailed description is as follows.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily
The same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can be combined by any suitable form.
Before elaborating a kind of beneficiation method of golden raw ore of the present invention, it is necessary to the related material referred in the present invention
Material and operation are described further, to reach better effect.
Ore grinding is made in mechanical equipment by means of the impact and mill stripping of medium (steel ball, rod iron, gravel) and ore itself
With, so that the granularity of ore is further become smaller, until grind into powder operation.
Satisfactory miberal powder is sent into the operation of next step by classification, and undesirable miberal powder is made back to ore grinding
Industry.Principle is that have different sinking speed in the medium because of granularity difference according to solid particle, particle swarm is divided into two kinds or more
The process of kind granularity level.
Underflow refers to coarse granule, high concentration or the highdensity product obtained through operations such as classification, concentration or sortings.
Overflow, which refers to, to fulfil assignment (such as sort, be classified), or after itself processing (such as clarification), from various
Equipment or the fluid of liquid container top discharge.
Flotation floats the abbreviation of ore dressing, is according to the difference of mineral particle surface physicochemical properties, by mineral floatability
The method that is sorted of difference.
Grade refers to useful element or its compound quality content ratio in ore.
The rate of recovery: refer to the mass percent of the gold and the gold in raw ore in Gold Concentrate under Normal Pressure.
After the associated materials referred in having understood the present invention and operation, below in conjunction with specific embodiments and Fig. 1
Process flow diagram, a kind of beneficiation method of low-grade vulcanized lead mine of the present invention is further described in detail:
One, embodiment
Embodiment 1
Specific steps are as follows:
(1) earlier machine: raw ore obtains 1000 tons of ore by crushing operation；
(2) first time grinding operation is passed through ore to level-one ore grinding device, obtains miberal powder, and miberal powder adds water and stirs evenly,
Ore pulp 1 is obtained, level-one ore grinding device should make miberal powder content of the fineness less than 0.074mm reach 60%；
(3) first time graded operation: ore pulp 1 is passed through level-one clasfficiator and is classified to obtain ore pulp 2 and level-one underflow mine
Slurry 3, by mass fraction be 65% level-one underflow ore pulp 3 be diverted to first time grinding operation, by mass fraction be 35% one
Grade underflow ore pulp 3 is diverted to second level ore grinding device and carries out ore grinding；
(4) second of grinding operation are passed through level-one underflow ore pulp 32 to second level ore grinding device, obtain ore pulp 4；Wherein, two
Grade ore grinding device makes miberal powder content of the fineness less than 0.074mm reach 67%；
(5) second of graded operation: ore pulp 2 and ore pulp 4 are passed through second level clasfficiator and are classified to obtain ore pulp 5 and second level
Second level underflow ore pulp 6 is returned to second of grinding operation by underflow ore pulp 6；
(6) flotation operation: ore pulp 5 is passed through flotation circuit and carries out flotation, obtains 4.08 tons of Gold Concentrate under Normal Pressure.
Table 1
As shown in Table 1, content golden in the final Gold Concentrate under Normal Pressure of the present embodiment is 55.34g/t, gold recovery 92.17%.
A kind of beneficiation method of gold raw ore, there is ore grinding processing twice described in the present embodiment, after conventional first time ore grinding,
Whole underflow ore pulps can be returned in first order grinding attachment, the present invention is after first time ore grinding, by 65% underflow ore pulp
Back in level-one ore grinding device, 35% underflow ore pulp enters second level ore grinding device, reduces the load of level-one ore grinding device,
Also, the energy consumption of level-one ore grinding device is reduced, meanwhile, second level ore grinding device first carries out ore grinding to part underflow ore pulp,
The slurry fineness for grinding second level ore grinding device is smaller, is conducive to subsequent graded operation, the ore pulp obtained by ore grinding it is thin
Degree is smaller, so that gold concentrate grade be made to improve, and then has reached the technical effect for improving recovery rate in ore-dressing.
Embodiment 2
Specific steps are as follows:
(1) earlier machine: raw ore obtains 1000 tons of ore by crushing operation；
(2) first time grinding operation is passed through ore to level-one ore grinding device, obtains miberal powder, and miberal powder adds water and stirs evenly,
Ore pulp 1 is obtained, level-one ore grinding device should make miberal powder content of the fineness less than 0.074mm reach 53%；
(3) first time graded operation: ore pulp 1 is passed through level-one clasfficiator and is classified to obtain ore pulp 2 and level-one underflow mine
Slurry 3, by mass fraction be 75% level-one underflow ore pulp 3 be diverted to first time grinding operation, by mass fraction be 25% one
Grade underflow ore pulp 3 is diverted to second level ore grinding device and carries out ore grinding；
(4) second of grinding operation are passed through level-one underflow ore pulp 32 to second level ore grinding device, obtain ore pulp 4；Wherein, two
Grade ore grinding device makes miberal powder content of the fineness less than 0.074mm reach 65%；
(5) second of graded operation: ore pulp 2 and ore pulp 4 are passed through second level clasfficiator and are classified to obtain ore pulp 5 and second level
Second level underflow ore pulp 6 is returned to second of grinding operation by underflow ore pulp 6；
(6) flotation operation: ore pulp 5 is passed through flotation circuit and carries out flotation, obtains 4.15 tons of Gold Concentrate under Normal Pressure.
Table 2
As shown in Table 2, content golden in the final Gold Concentrate under Normal Pressure of the present embodiment is 53.24g/t, gold recovery 92.01%.
A kind of beneficiation method of gold raw ore, there is ore grinding processing twice described in the present embodiment, after conventional first time ore grinding,
Whole underflow ore pulps can be returned in first order grinding attachment, the present invention is after first time ore grinding, by 75% underflow ore pulp
Back in level-one ore grinding device, 25% underflow ore pulp enters second level ore grinding device, reduces the load of level-one ore grinding device,
Also, the energy consumption of level-one ore grinding device is reduced, meanwhile, second level ore grinding device first carries out ore grinding to part underflow ore pulp,
The slurry fineness for grinding second level ore grinding device is smaller, is conducive to subsequent graded operation, the ore pulp obtained by ore grinding it is thin
Degree is smaller, so that gold concentrate grade be made to improve, and then has reached the technical effect for improving recovery rate in ore-dressing.
Embodiment 3
Specific steps are as follows:
(1) earlier machine: raw ore obtains 1000 tons of ore by crushing operation；
(2) first time grinding operation is passed through ore to level-one ore grinding device, obtains miberal powder, and miberal powder adds water and stirs evenly,
Ore pulp 1 is obtained, level-one ore grinding device should make miberal powder content of the fineness less than 0.074mm reach 57%；
(3) first time graded operation: ore pulp 1 is passed through level-one clasfficiator and is classified to obtain ore pulp 2 and level-one underflow mine
Slurry 3, by mass fraction be 70% level-one underflow ore pulp 3 be diverted to first time grinding operation, by mass fraction be 30% one
Grade underflow ore pulp 3 is diverted to second level ore grinding device and carries out ore grinding；
(4) second of grinding operation are passed through level-one underflow ore pulp 32 to second level ore grinding device, obtain ore pulp 4；Wherein, two
Grade ore grinding device makes miberal powder content of the fineness less than 0.074mm reach 70%；
(5) second of graded operation: ore pulp 2 and ore pulp 4 are passed through second level clasfficiator and are classified to obtain ore pulp 5 and second level
Second level underflow ore pulp 6 is returned to second of grinding operation by underflow ore pulp 6；
(6) flotation operation: ore pulp 5 is passed through flotation circuit and carries out flotation, obtains 3.87 tons of Gold Concentrate under Normal Pressure.
Table 3
As shown in Table 3, content golden in the final Gold Concentrate under Normal Pressure of the present embodiment is 56.81g/t, gold recovery 92.33%.
A kind of beneficiation method of gold raw ore, there is ore grinding processing twice described in the present embodiment, after conventional first time ore grinding,
Whole underflow ore pulps can be returned in first order grinding attachment, the present invention is after first time ore grinding, by 70% underflow ore pulp
Back in level-one ore grinding device, 30% underflow ore pulp enters second level ore grinding device, reduces the load of level-one ore grinding device,
Also, the energy consumption of level-one ore grinding device is reduced, meanwhile, second level ore grinding device first carries out ore grinding to part underflow ore pulp,
The slurry fineness for grinding second level ore grinding device is smaller, is conducive to subsequent graded operation, the ore pulp obtained by ore grinding it is thin
Degree is smaller, so that gold concentrate grade be made to improve, and then has reached the technical effect for improving recovery rate in ore-dressing.
Two, ore dressing data comparison
The obtained ore dressing data of above-described embodiment 1-3 and existing ore dressing data are compared, 1000 tons of ore, is had
Volume data comparison is shown in Table 4.
Table 4
Remarks: flotation fineness is -200 mesh institute accountings in table；
Rate of recovery calculation method: theoretical recovery=((head grade-tailings grade) X concentrate grade)/((concentrate grade-
Tailings grade) X head grade)；
As shown in Table 4, the beneficiation method that embodiment 1-3 is used is improving the same of golden raw ore flotation fineness and gold concentrate grade
When, golden head grade and golden tailings grade are reduced, the energy consumption of level-one ore grinding device is not only reduced, meanwhile, secondary grinding
Mine device first carries out ore grinding to part underflow ore pulp, and the slurry fineness for grinding second level ore grinding device is smaller, is conducive to subsequent
The fineness of graded operation, the ore pulp obtained by ore grinding is smaller, so that gold concentrate grade be made to improve, and then has reached raising ore dressing
The technical effect of the rate of recovery.
On the other hand, as shown in Fig. 2, the embodiment of the present invention also provides a kind of ore-dressing plant of golden raw ore, which includes:
Crushing device 10, crushing device 10 generate ore for being crushed raw ore；
Ore grinding device, ore grinding device include the first ore grinding device 210 and the second ore grinding device 220, the first ore grinding device 210
It is connected to crushing device 10, for ore to be carried out ore grinding, and generates ore pulp；
Grading plant, grading plant include the first grading plant 310, the second grading plant 320, the first feed pipe 330, the
One discharge nozzle 340, the second discharge nozzle 350 and third discharge nozzle 360, the both ends of the first feed pipe 330 are connected to the first mill
Mine device 210 and the first grading plant 310, for by the pulp conveying in the first ore grinding device 210 to the first grading plant
310, the both ends of the first discharge nozzle 340 are connected to the first ore grinding device 210 and the first grading plant 310, are used for part
Underflow pulp conveying to the first ore grinding device 210, the both ends of the second discharge nozzle 350 are connected to 310 He of the first grading plant
Second ore grinding device 220, for dividing the both ends of part underflow pulp conveying to the second ore grinding device 220, third discharge nozzle 360
It is not connected to the first grading plant 310 and the second grading plant 320, the overflow pulp for generating the first grading plant 310
It is delivered to the second grading plant 320.
In technical solution provided in an embodiment of the present invention, crushing device 10 generates ore for being crushed raw ore；Ore grinding dress
It sets including the first ore grinding device 210 and the second ore grinding device 220, the first ore grinding device 210 is connected to crushing device 10, and being used for will
Ore carries out ore grinding, and generates ore pulp；Classification mechanism includes the first grading plant 310, the charging of the second grading plant 320, first
Pipe 330, the first discharge nozzle 340, the second discharge nozzle 350 and third discharge nozzle 360, the both ends of the first feed pipe 330 are separately connected
In the first ore grinding device 210 and the first grading plant 310, for by the pulp conveying in the first ore grinding device 210 to first point
Stage arrangement 310, the both ends of the first discharge nozzle 340 are connected to the first ore grinding device 210 and the first grading plant 310, are used for
By part underflow pulp conveying to the first ore grinding device 210, the both ends of the second discharge nozzle 350 are connected to the first grading plant
310 and the second ore grinding device 220, for by part underflow pulp conveying to the second ore grinding device 220, third discharge nozzle 360
Both ends are connected to the first grading plant 310 and the second grading plant 320, overflow for generate the first grading plant 310
Flow pulp conveying to the second grading plant 320, compared with the existing technology, after first order grinding attachment carries out ore grinding to ore,
Whole underflow ore pulps can be returned in first order grinding attachment, cause the load of first order grinding attachment to increase, to reduce
The working efficiency of first order grinding attachment, also, the fineness for also resulting in the ore pulp that first order grinding attachment is ground is insufficient, into
And subsequent process flow is influenced, in the embodiment of the present invention, the first grading plant 310 is by a part of underflow pulp conveying to first
Ore grinding device 210, another part underflow pulp conveying to the second ore grinding device 220 not only reduce the negative of level-one ore grinding device
Lotus, also, the energy consumption of level-one ore grinding device is reduced, meanwhile, second level ore grinding device first grinds part underflow ore pulp
Mine, the slurry fineness for grinding second level ore grinding device is smaller, is conducive to subsequent graded operation, the ore pulp obtained by ore grinding
Fineness is smaller, so that gold concentrate grade be made to improve, and then has reached the technical effect for improving recovery rate in ore-dressing.
The effect of above-mentioned crushing device 10 is to be crushed to golden raw ore, and generate ore, and crushing device 10 can use
Common attrition crushing device 10, can also be using other crushing devices 10, as long as can be crushed to golden raw ore；
The effect of ore grinding device is to carry out ore grinding to ore to generate miberal powder, and ore grinding device includes the first ore grinding device 210 and the second ore grinding
Device 220, the first ore grinding device 210 are connected to crushing device 10, generate miberal powder for ore to be carried out ore grinding, then into miberal powder
Suitable water is added and forms ore pulp, ore grinding device is mainly the impact by means of medium (steel ball, rod iron, gravel) and ore itself
And grinding and peeling effect, so that the granularity of ore is further become smaller, until the operation of grind into powder, therefore, ore grinding device can be used
Ball mill or the setting of other ore grindings, as long as can be by gold ore grind into powder；Classification mechanism includes the first classification dress
Set the 310, second grading plant 320, the first feed pipe 330, the first discharge nozzle 340, the second discharge nozzle 350 and third discharge nozzle
360, the both ends of the first feed pipe 330 are connected to the first ore grinding device 210 and the first grading plant 310, are used for first
For pulp conveying in ore grinding device 210 to the first grading plant 310, the both ends of the first discharge nozzle 340 are connected to the first mill
Mine device 210 and the first grading plant 310 are used for part underflow pulp conveying to the first ore grinding device 210, the second discharge nozzle
350 both ends are connected to the first grading plant 310 and the second ore grinding device 220, are used for part underflow pulp conveying extremely
Second ore grinding device 220, the both ends of third discharge nozzle 360 are connected to the first grading plant 310 and the second grading plant
320, the overflow pulp for generating the first grading plant 310 is delivered to the second grading plant 320, is first put into brokenly golden raw ore
In crushing device 10,10 pairs of crushing device golden raw ores, which be crushed, forms ore, then ore is passed through the first ore grinding device 210, right
Ore carries out ore grinding and forms powder, then suitable water is added into powder, forms ore pulp, and ore pulp is then passed through the first classification dress
It sets in 310, graded operation is carried out to ore pulp, a part of underflow ore pulp is filled by the first discharge nozzle 340 back to the first ore grinding
It sets in 210, continues to grind by the first ore grinding device 210, the underflow ore pulp of another part enters the by the second discharge nozzle 350
In two ore grinding devices 220, underflow ore pulp is ground by the second ore grinding device 220, not only reduces level-one ore grinding device
Load, also, reduce the energy consumption of level-one ore grinding device, meanwhile, the overflow pulp that the first grading plant 310 is generated
It is delivered to the second grading plant 320, graded operation is carried out to overflow pulp, forms secondary underflow ore pulp and secondary overflow pulp,
Secondary overflow pulp is directly entered flotation operation program, and secondary underflow ore pulp enters the second ore grinding device 220 and ground, so
Afterwards, the ore pulp that the second ore grinding device 220 is ground is passed through the second grading plant 320, graded operation is continued to ore pulp, this
In embodiment, ore grinding is first carried out to part underflow ore pulp by second level ore grinding device, the ore pulp for grinding second level ore grinding device is thin
The fineness for the ore pulp spent smaller, be conducive to subsequent graded operation, also, obtained by ore grinding is smaller, to make Gold Concentrate under Normal Pressure product
Position is improved, and then has reached the technical effect for improving recovery rate in ore-dressing.
Further, the diameter of the first discharge nozzle 340 is greater than the diameter of the second discharge nozzle 350.In the present embodiment, further
The first discharge nozzle 340 and the second discharge nozzle 350 are defined, since most underflow ore pulp needs to enter the first ore grinding device
210 are re-grind, and two least a portion of underflow ore pulps are ground into the second ore grinding device 220, by changing the first discharge nozzle
340 and second the diameter of discharge nozzle 350 limit the amount of flow of underflow ore pulp, make the underflow mine into the first ore grinding device 210
Slurry is more than the underflow ore pulp into the second ore grinding device 220, to further reach the load and energy for reducing level-one ore grinding device
The technical effect of source consumption.
Further, return pipe 40 is increased, one end of return pipe 40 is connected to the second ore grinding device 220, and the other end connects
It is connected to the second grading plant 320, the pulp conveying for generating the second ore grinding device 220 to the second grading plant 320.This reality
It applies in example, increases return pipe 40, the effect of return pipe 40 is the pulp conveying that generates the second ore grinding device 220 to second point
Stage arrangement 320, the second ore grinding device 220 can grind the smaller ore pulp of fineness, keep the fineness of ore pulp smaller, pass through
Two ore grinding devices 220 grind ore pulp, then are passed through in the second grading plant 320 by return pipe 40, divide ore pulp
Grade operation, underflow ore pulp return in the second ore grinding device 220, and overflow pulp enters flotation operation, improve returning for gold to reach
The technical effect of yield.
Further, flotation unit 50 is increased, flotation unit 50 is connected to the second grading plant 320, for receiving the
The overflow pulp that two grading plants 320 generate.Flotation unit 50 is according to mineral particle surface physicochemical properties
Difference, by the device that the difference of mineral floatability is sorted, in flotation operation, it will usually flotation reagent, such as water be added
The flotation reagents such as glass, collecting agent, foaming agent can preferably extract mineral grain, to reach the skill for improving the grade of gold
Art effect.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of beneficiation method of gold raw ore, which comprises the following steps:
(1) earlier machine: raw ore obtains ore by crushing operation；
(2) first time grinding operation is passed through ore to level-one ore grinding device, obtains miberal powder, and miberal powder adds water and stirs evenly, obtains
Ore pulp 1；Wherein, level-one ore grinding device should make miberal powder content of the fineness less than 0.074mm reach 50% or more；
(3) first time graded operation: being passed through level-one clasfficiator for ore pulp 1 and be classified to obtain ore pulp 2 and level-one underflow ore pulp 3,
Level-one underflow ore pulp 3 is divided for level-one underflow ore pulp 31 and level-one underflow ore pulp 32, wherein level-one underflow ore pulp 31 accounts for level-one bottom
Flow ore pulp 3 mass fraction be 65% to 75%, level-one underflow ore pulp 32 account for level-one underflow ore pulp 3 mass fraction be 25% to
35%, level-one underflow ore pulp 31 returns to first time grinding operation, and level-one underflow ore pulp 32 is passed through second level ore grinding device and carries out ore grinding；
(4) second of grinding operation are passed through level-one underflow ore pulp 32 to second level ore grinding device, obtain ore pulp 4；Wherein, secondary grinding
Mine device should make fineness reach 65% or more less than the miberal powder content of 200 mesh；
(5) second of graded operation: ore pulp 2 and ore pulp 4 are passed through second level clasfficiator and are classified to obtain ore pulp 5 and second level underflow
Second level underflow ore pulp 6 is returned to second of grinding operation by ore pulp 6；
(6) flotation operation: ore pulp 5 is passed through flotation circuit and carries out flotation, obtains Gold Concentrate under Normal Pressure.
2. beneficiation method according to claim 1, which is characterized in that
In the step (3), the mass fraction that level-one underflow ore pulp 31 accounts for level-one underflow ore pulp 3 is 70%, level-one underflow ore pulp
32 mass fractions for accounting for level-one underflow ore pulp 3 are 30%.
3. beneficiation method according to claim 1, which is characterized in that
In the step (1), the mass concentration of ore pulp 1 is 45%.
4. according to beneficiation method according to claim 1, which is characterized in that
In the step (6), the grinding fineness of ore pulp 5 is that -200 mesh account for 93%.
5. a kind of ore-dressing plant of gold raw ore characterized by comprising
Crushing device, the crushing device generate ore for being crushed raw ore；
Ore grinding device, the ore grinding device include the first ore grinding device and the second ore grinding device, the first ore grinding device connection
In the crushing device, for ore to be carried out ore grinding, and ore pulp is generated；
Classification mechanism, the classification mechanism include the first grading plant, the second grading plant, the first feed pipe, the first discharge nozzle,
Second discharge nozzle and third discharge nozzle, the both ends of first feed pipe are connected to the first ore grinding device and described
One grading plant, for the pulp conveying in the first ore grinding device to first grading plant, described first to discharge
The both ends of pipe are connected to the first ore grinding device and first grading plant, are used for part underflow pulp conveying extremely
The first ore grinding device, the both ends of second discharge nozzle are connected to first grading plant and second ore grinding
Device, for by part underflow pulp conveying to the second ore grinding device, the both ends of the third discharge nozzle to be connected to
First grading plant and second grading plant, the overflow pulp for generating first grading plant are delivered to
Second grading plant.
6. ore-dressing plant according to claim 5, which is characterized in that
The diameter of first discharge nozzle is greater than the diameter of second discharge nozzle.
7. ore-dressing plant according to claim 5, which is characterized in that further include:
Return pipe, one end of the return pipe are connected to the second ore grinding device, and the other end is connected to the second classification dress
It sets, the pulp conveying for generating the second ore grinding device to second grading plant.
8. ore-dressing plant according to claim 7, which is characterized in that further include:
Flotation unit, the flotation unit are connected to second grading plant, generate for receiving second grading plant
Overflow pulp.
9. ore-dressing plant according to claim 5, which is characterized in that
First grading plant and second grading plant are cyclone.
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