CN110449246A - A kind of pair of mineral carry out selective milling, the method for sorting and implementation equipment - Google Patents

A kind of pair of mineral carry out selective milling, the method for sorting and implementation equipment Download PDF

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Publication number
CN110449246A
CN110449246A CN201910735308.3A CN201910735308A CN110449246A CN 110449246 A CN110449246 A CN 110449246A CN 201910735308 A CN201910735308 A CN 201910735308A CN 110449246 A CN110449246 A CN 110449246A
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CN
China
Prior art keywords
grinding
mineral
grade
product
sorting
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Pending
Application number
CN201910735308.3A
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Chinese (zh)
Inventor
何亚民
丁亚卓
徐智平
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Chengdu Leejun Industrial Co Ltd
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Chengdu Leejun Industrial Co Ltd
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Priority to CN201910735308.3A priority Critical patent/CN110449246A/en
Publication of CN110449246A publication Critical patent/CN110449246A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/10Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00Crushing or disintegrating by roller mills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00General arrangement of separating plant, e.g. flow sheets

Abstract

The invention discloses a kind of pair of mineral to carry out selective milling, the method for sorting and implementation equipment, including carries out preliminary grinding to mineral;The product obtained after grinding mineral is classified, coarse fraction product I is obtained and partial size is less than the fine fraction product I of coarse fraction product I;Grinding is carried out to coarse fraction product I;The product obtained to grinding coarse fraction product I is classified, and obtains coarse fraction product II and partial size is less than the fine fraction product II of coarse fraction product II.The beneficial effects of the present invention are: this programme can reduce the pressure and operating time of milling equipment, is conducive to protect milling equipment, extends the service life of milling equipment.It avoids the fine fraction product I obtained after first time grinding is repeated multiple times in milling equipment from crossing grinding, and valuable mineral is avoided to lose, also avoid fine fraction product I from occupying extra space in milling equipment and reduce the efficiency of grinding.

Description

A kind of pair of mineral carry out selective milling, the method for sorting and implementation equipment
Technical field
The present invention relates to technical field, specifically a kind of pair of mineral carry out selective milling, the method for sorting and implementation dress It is standby.
Background technique
Ore grinding is made by means of the impact and mill stripping of medium (steel ball, rod iron, gravel) and ore itself in mechanical equipment With and so that the granularity of ore is further become smaller, until grind into powder operation.Purpose be make form ore valuable mineral with Gangue mineral reaches maximum dissociation, to provide the material for meeting next beneficiating process requirement in granularity.Ore milling product warp After classification, unqualified part returns to former grinding machine, claims closed circuit grinding;If do not returned to former grinding machine or by another grinding machine processor, Claim open-circuit grinding.
Ore grinding is an epochmaking operation in dressing plant, and the quality of Grinding producation quality directly affects the height of sorting index It is low.Attrition process is also that power consumption in factory, metal material is selected to consume maximum operation, and equipment investment used also occupies very high Density.
High-pressure roller mill be based on comminution principle design a kind of novel milling equipment, material in crusher chamber by Certain and relatively uniform quasi static pressure is broken along dissociation face, due to the unique working principle of high-pressure roller mill, it is suitable for Crush it is hard, in the various different hardness such as hard, soft material.Material realizes the solutions of soft or hard mineral after passing through high-pressure roller mill roll-in From, but hard mineral surfaces also remain it is certain soft or in soft mineral, the dissociation of this part of mineral may be implemented in rod mill, and It can prevent overground or cross crushing.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provides the methods that a kind of pair of mineral carry out selective milling, sorting And implement equipment, for improving the bioaccumulation efficiency of mineral, reduce energy consumption.
Technical solution used by the present invention solves the above problems is: a kind of pair of mineral carry out selective milling, sorting Method, including the following steps:
Step S1: preliminary grinding is carried out to mineral;
Step S2: being classified the product obtained after grinding mineral, obtains coarse fraction product I and partial size is less than coarse fraction The fine fraction product I of product I;
Step S3: grinding is carried out to coarse fraction product I;
Step S4: the product obtained to grinding coarse fraction product I is classified, and obtains coarse fraction product II and partial size is less than The fine fraction product II of coarse fraction product II.
Further, in order to preferably realize the present invention, in the step S1, material is carried out using high-pressure roller mill Roll-in, maximum feeding granularity are less than 50mm, and projecting pressure when roll-in is 3~5MPa.
Further, in order to preferably realize the present invention, the step S1 is followed using primary open circuit rolling process, rim charge One of ring rolling process, closed circuit screening rolling process process implements roll-in to mineral.
Further, in order to preferably realize the present invention, the closed circuit screening rolling process is dry screening, sieves grain Grade size is 1mm~8mm.
Further, in order to preferably realize the present invention, in the step S2, air classification and/or waterpower point are utilized Grade carries out classification processing to the product obtained after grinding mineral.
Further, in order to preferably realize the present invention, the air classification is using V-type rotation powder machine and/or dynamic choosing Powder machine is implemented;The hydraulic classiciation is implemented using wet classification equipment;In the step S2, it is classified processing Granularity is 0.074mm~0.5mm.
Further, in order to preferably realize the present invention, in the step S3, dry type rod milling work is utilized using rod mill Skill and/or wet type rod milling technique carry out grinding to coarse fraction product I.
Further, in order to preferably realize the present invention, in the step S4, air classification and/or waterpower point are utilized Grade carries out classification processing to the product obtained after grinding mineral;Air classification is carried out using V-type rotation powder machine and/or dynamic powder concentrator Implement;The hydraulic classiciation is implemented using wet classification equipment;The granularity of classification processing is 0.074mm~0.5mm.
A kind of pair of mineral carry out the implementation equipment of selective milling, sorting, including I grade of grinding device and I grade of grinding device I grade of grading plant, II grade of grinding device being connected to I grade of grading plant and II fraction being connected to II grade of grinding device of connection Stage arrangement.
Further, in order to preferably realize the present invention, I grade of grinding device uses high-pressure roller mill, I grade of classification Device uses wind classification device or hydraulic grading device;II grade of grinding device uses rod mill, II grade of grading plant Wind classification device or hydraulic grading device;The wind classification device is using V-type rotation powder machine and/or dynamic powder concentrator, institute The hydraulic grading device stated uses wet classification equipment.
Beneficial effect acquired by this programme is:
This programme mesohigh roller mill is hard suitable for grinding, the various different hardness such as hard, soft material.Material passes through height The dissociation of soft or hard mineral is realized after pressure roller grinding machine roll-in, and high-pressure roller mill and rod mill are not in the overground or mistake of material It crushes, subsequent hierarchical effect is high, avoids the fine fraction product I obtained after first time grinding is repeated multiple times in milling equipment from crossing powder Mill, and valuable mineral is avoided to lose, also avoid fine fraction product I from occupying extra space in milling equipment and reduce grinding Efficiency.
Detailed description of the invention
Fig. 1 is the technical process schematic diagram of grinding diaspore bauxite in embodiment 2;
Fig. 2 is the technical process schematic diagram of grinding feldspar ore in embodiment 3;
Fig. 3 is the technical process schematic diagram of grinding navajoite in embodiment 4.
Specific embodiment
Below with reference to examples and drawings, the present invention is described in further detail, but embodiments of the present invention are not It is limited to this.
Embodiment 1:
In the present embodiment, the method that a kind of pair of mineral carry out selective milling, sorting, including the following steps:
Step S1: preliminary grinding is carried out to mineral;
Step S2: being classified the product obtained after grinding mineral, obtains coarse fraction product I and partial size is less than coarse fraction The fine fraction product I of product I;
Step S3: grinding is carried out to coarse fraction product I;
Step S4: the product obtained to grinding coarse fraction product I is classified, and obtains coarse fraction product II and partial size is less than The fine fraction product II of coarse fraction product II.
This programme can be suitable for the grinding of multi mineral, have the advantages that applied widely.Mineral itself are broken in hand When broken, since its Density Distribution is uneven, structure unevenly leads to discontinuity, after grinding gained particle partial size not Uniformly.This programme is several times crushed mineral, and is carrying out classification processing to the product after first break, can be by The non-uniform product of partial size is divided into I two parts of coarse fraction product I and fine fraction product after primary fragmentation, then to coarse fraction product I Carry out fine powder mill.
In grinding with a collection of mineral, the pressure and operating time of milling equipment can be reduced, be conducive to that grinding is protected to set It is standby, extend the service life of milling equipment.Avoid the fine fraction product I obtained after first time grinding repeatedly more in milling equipment It is secondary to cross grinding, and valuable mineral is avoided to lose, also avoid fine fraction product I from occupying extra space in milling equipment and reduce The efficiency of grinding.
Embodiment 2:
As shown in Figure 1, carrying out grinding, A/S in diaspore bauxite to diaspore bauxite in the present embodiment (Al2O3/SiO2) 4 or so, including the following steps:
Step S1: preliminary grinding is carried out to diaspore bauxite using high pressure roller rim charge circulation rolling process;
Step S2: material carries out 0.5mm hydraulic classiciation using hydrocyclone after roll-in, obtains hard mineral i.e. coarse fraction and produces Product I (grade >=0.5mm) and soft mineral, that is, fine fraction product I (grade < 0.5mm);
Step S3: wet type rod milling is carried out using rod mill to coarse fraction product I;Rod mill due to be at frotton line contact, When bastinade hits ore, it is turned on coarse grain first.Lesser ore particle is then just ground, to reduce the danger crushed.Work as stick When turning rising along liner plate, the coarse grain clipped therebetween is equivalent to bar screen, allows particulate grade particles to pass through between the gap of stick, has Conducive to the place for being caught broken coarse grain with making coarse grain concentrate on milling medium strike.Therefore the product granularity range of rod mill is relatively narrow, produces It is few to cross grinding phenomenon for product epigranular.
Step S4: material continues to carry out 0.5mm hydraulic classiciation using hydrocyclone after rod milling, obtains coarse fraction product I I (grade >=0.5mm) and fine fraction product I I (grade < 0.5mm), finally obtaining coarse fraction product I I is concentrate, and A/S content reaches To 6 or more, fine fraction product I I is chats, and A/S is 3 or so, and fine fraction product I is tailing, and A/S is 2 or less.
Embodiment 3:
As shown in Fig. 2, carrying out grinding to certain feldspar ore, quartz content is 70% in feldspar ore, and feldspar contains in the present embodiment Amount is 30%.
Step S1: preliminary grinding is carried out to feldspar ore using high pressure roller 5mm closed cycle sieving technology;
Step S2: material carries out 0.2mm hydraulic classiciation using hydrocyclone after roll-in, obtains coarse fraction product I (grade >=0.2mm) and fine fraction product I (grade < 0.2mm);
Step S3: coarse fraction product I material carries out wet type rod milling using rod mill;
Step S4: material continues to carry out 0.2mm hydraulic classiciation using hydrocyclone after rod milling, obtains coarse fraction product I I (grade >=0.2mm) and fine fraction product I I (grade < 0.2mm), finally obtaining fine fraction product I is feldspar concentrate, and feldspar contains Amount has reached 80%, and fine fraction product I I is chats, and feldspar content 55%, coarse fraction product I I is tailing, and feldspar content is 8%.
Embodiment 4:
As shown in figure 3, carrying out grinding to certain navajoite, pentoxide content is 1% or so in navajoite in the present embodiment.
Step S1: preliminary grinding is carried out to navajoite using high pressure roller 5mm closed cycle sieving technology;
Step S2: material carries out 0.15mm air classification using V-type rotation powder machine and dynamic powder concentrator after roll-in, obtains coarse fraction Product I (grade >=0.15mm) and fine fraction product I (grade < 0.15mm);
Step S3: coarse fraction product I material carries out dry type rod milling using rod mill;
Step S4: material continues to carry out 0.15mm air classification, coarse fraction product I I (grade using V choosing+dynamic choosing after rod milling >=0.15mm) and fine fraction product I I (grade < 0.15mm), finally obtaining fine fraction product I is concentrate, and vanadic anhydride contains Amount has reached 2.9%, and fine fraction product I I is chats, pentoxide content 1.5%, and coarse fraction product I I is tailing, and five V 2 O content is 0.6%.
Embodiment 5:
On the basis of the above embodiments, roll-in is carried out to material using high-pressure roller mill, maximum feeding granularity is less than 50mm, projecting pressure when roll-in are 3~5MPa.Suitable projecting pressure is selected according to material characteristic and sorting index.
The step S1 is using in primary open circuit rolling process, rim charge circulation rolling process, closed circuit screening rolling process A kind of process to mineral implement roll-in.According to the high pressure roller mill technique stream that material characteristic and sorting index selection are suitable Journey.
The closed circuit screening rolling process is dry screening, and sieve fraction size is 1mm~8mm.
Classification processing is carried out to the product obtained after grinding mineral using air classification and/or hydraulic classiciation.Wind is classified Using air as separating medium, a kind of side for sorting solid material particle by density and particle size differences Method, material handled by air classification must be it is dry, moisture content is generally below 5%, and the effect of air classification is high, but because producing Object be it is dry be not required to be dehydrated, wet-treating or the uneconomic material of wet-treating cannot be used by being suitable for some, such as talcum, aluminium alum Soil, apatite, coal dust, kaolin etc..Hydraulic classiciation is the difference of the sinking speed in moving medium according to material particles, by grain The wider mine particle group of rank is spent, the process of several narrow granularity level products is divided into.Hydraulic classiciation water material moisture no requirement (NR) is applicable in Range is wide.
Embodiment 6:
As shown in Figure 1-Figure 3, on the basis of the above embodiments, in the present embodiment, a kind of pair of mineral carry out selective mill Mine, sorting implementation equipment, including I grade of grinding device, I grade of grading plant be connected to I grade of grinding device and I grade of classification dress The II grade of grading plant setting II grade of grinding device of connection and being connected to II grade of grinding device.I grade of grinding device uses High-pressure roller mill, I grade of grading plant use wind classification device or hydraulic grading device;II grade of grinding device uses stick Grinding machine, II grade of grading plant wind classification device or hydraulic grading device;The wind classification device revolves powder machine using V-type And/or dynamic powder concentrator, the hydraulic grading device use wet classification equipment.
In the present embodiment, the high-pressure roller mill, wind classification device or hydraulic grading device are all made of the prior art, The improvement of its specific structure and working principle not as this programme, the content energy that those skilled in the art record according to this programme Enough realize said effect, herein not to the specific structure of the devices such as high-pressure roller mill, wind classification device or hydraulic grading device, Working principle and connection relationship are defined.
In the present embodiment, other contents not described are same as the previously described embodiments, therefore do not repeat.
It is above-described, it is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, According to the technical essence of the invention, within the spirit and principles in the present invention, to the above embodiments any simply to repair Change, equivalent replacement and improvement etc., fall within the scope of protection of the technical scheme of the present invention within.

Claims (10)

1. the method that a kind of pair of mineral carry out selective milling, sorting, it is characterised in that: including the following steps:
Step S1: preliminary grinding is carried out to mineral;
Step S2: being classified the product obtained after grinding mineral, obtains coarse fraction product I and partial size is less than coarse fraction product I fine fraction product I;
Step S3: grinding is carried out to coarse fraction product I;
Step S4: the product obtained to grinding coarse fraction product I is classified, and obtains coarse fraction product II and partial size is less than coarse grain The fine fraction product II of grade product II.
2. the method that a kind of pair of mineral according to claim 1 carry out selective milling, sorting, it is characterised in that: described Step S1 in, roll-in is carried out to material using high-pressure roller mill, maximum feeding granularity is less than 50mm, projecting pressure when roll-in For 3~5MPa.
3. the method that a kind of pair of mineral according to claim 1 carry out selective milling, sorting, it is characterised in that: described Step S1 using one of primary open circuit rolling process, rim charge circulation rolling process, closed circuit screening rolling process technique side Method implements roll-in to mineral.
4. a kind of pair of mineral according to claim 3 carry out selective milling, the method for sorting and implementation equipment, feature Be: the closed circuit screening rolling process is dry screening, and sieve fraction size is 1mm~8mm.
5. the method that a kind of pair of mineral according to claim 1 carry out selective milling, sorting, it is characterised in that: described Step S2 in, classification processing is carried out to the product obtained after grinding mineral using air classification and/or hydraulic classiciation.
6. the method that a kind of pair of mineral according to claim 5 carry out selective milling, sorting, it is characterised in that: described Air classification using V-type rotation powder machine and/or dynamic powder concentrator implemented;The hydraulic classiciation uses wet classification equipment Implemented;In the step S2, the granularity for being classified processing is 0.074mm~0.5mm.
7. the method that a kind of pair of mineral according to claim 1 carry out selective milling, sorting, it is characterised in that: described Step S3 in, grinding is carried out to coarse fraction product I using dry type rod milling technique and/or wet type rod milling technique using rod mill.
8. the method that a kind of pair of mineral according to claim 7 carry out selective milling, sorting, it is characterised in that: described Step S4 in, classification processing is carried out to the product obtained after grinding mineral using air classification and/or hydraulic classiciation;Wind-force point Grade is implemented using V-type rotation powder machine and/or dynamic powder concentrator;The hydraulic classiciation is carried out real using wet classification equipment It applies;The granularity of classification processing is 0.074mm~0.5mm.
9. the implementation equipment that a kind of pair of mineral carry out selective milling, sorting, it is characterised in that: including I grade of grinding device and I I grade of grading plant of grade grinding device connection, II grade of grinding device being connected to I grade of grading plant and with II grade of grinding device company II grade of logical grading plant.
10. the implementation equipment that a kind of pair of mineral according to claim 9 carry out selective milling, sorting, it is characterised in that: I grade of grinding device uses high-pressure roller mill, and I grade of grading plant uses wind classification device or hydraulic grading device;Institute The II grade of grinding device stated uses rod mill, II grade of grading plant wind classification device or hydraulic grading device;The wind-force Grading plant uses wet classification equipment using V-type rotation powder machine and/or dynamic powder concentrator, the hydraulic grading device.
CN201910735308.3A 2019-08-09 2019-08-09 A kind of pair of mineral carry out selective milling, the method for sorting and implementation equipment Pending CN110449246A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN111389582A (en) * 2020-03-26 2020-07-10 中国恩菲工程技术有限公司 Method for separating chromite from laterite-nickel ore
CN112547286A (en) * 2020-11-19 2021-03-26 四川轻化工大学 Integrated mineral sorting system and sorting method thereof
CN112619872A (en) * 2020-12-01 2021-04-09 江西都昌金鼎钨钼矿业有限公司 Pre-grading scheme before ore grinding

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CN112619872B (en) * 2020-12-01 2022-11-22 江西都昌金鼎钨钼矿业有限公司 Pre-grading scheme before ore grinding

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Application publication date: 20191115