CN210585299U

CN210585299U - Iron ore crushing screening dry separation system

Info

Publication number: CN210585299U
Application number: CN201920809149.2U
Authority: CN
Inventors: 宋林; 宋斌燕; 张伟; 曾建龙
Original assignee: ABA Mining Co ltd
Current assignee: ABA Mining Co ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-05-22
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses an iron ore crushing and screening dry separation system, which belongs to the technical field of iron ore dressing and comprises a first-stage coarse crushing device, a second-stage middle crushing device, an inspection and screening device, a third-stage fine crushing device and a dry separation device in sequence, wherein the inspection and screening device is a double-layer screen device, the dry separation device comprises two dry separation devices, namely a first dry separation device and a second dry separation device, and undersize materials and intermediate materials of the lower layer of the double-layer screen device enter the first dry separation device and the second dry separation device respectively; the tailing of the first dry separation equipment enters the second double-layer screen equipment; the utility model can greatly reduce the load of the fine crusher, thereby reducing the consumption of the lining plate of the crusher and saving the crushing cost; the tailings of the middle-31.5 +12mm material after dry separation and the tailings of the crushed-12 mm material after dry separation can be used as building materials after screening, so that the generation of solid wastes is reduced, the environment is protected, remarkable income is brought to enterprises, and the economic benefit is remarkably improved.

Description

Iron ore crushing screening dry separation system

Technical Field

The utility model relates to an iron ore dressing technical field especially relates to an iron ore crushing screening dry separation system.

Background

Crushing, screening and dry separation of iron ore are common equipment, but different equipment is often used for ores with different characteristics and different producing areas. For example, the maximum particle size of the mined ore is about 700mm, the average grade of various resources is TFe 20.52%, TiO26.21%, V2O50.54% and P2O53.15%, the current crushing, screening and dry separation equipment comprises a first-stage coarse crushing device (adopting a jaw crusher), a second-stage medium crushing device (adopting a jaw crusher), a third-stage fine crushing device (adopting a spring cone crusher), an inspection screening device (adopting a circular vibration screen) and a dry magnetic separation device (adopting a dry separator),

the typical flow of the method is shown in figure 1, raw ore with the particle size of 700mm is subjected to first-stage coarse crushing and second-stage intermediate crushing, then is subjected to inspection and screening, and oversize products are subjected to third-stage fine crushing and then are returned to inspection and screening; dry separation is carried out on the undersize (the particle size is 18mm below zero) to obtain concentrate and tailings, and the concentrate is sent into a grinding and separating system;

the current processing equipment and flow have the following problems:

1. the circular vibrating screen of the existing detection screening equipment adopts a single-layer screen, the screening efficiency is low, the load of a fine crusher is high, the lining plate of the fine crusher is consumed quickly, the crushing cost is increased on the side surface, if the lining plate made of a woven mesh material is adopted, the lining plate needs to be replaced about one week, and the cost is the direct cost for replacing the lining plate of the crusher, and accounts for about 10% of the crushing cost;

2. all dry separation tailings are discharged to a rubble storage yard, so that the dry separation tailings have no economic value, can be stacked only as solid wastes, and also cause great pressure on environmental protection.

Disclosure of Invention

The utility model aims at providing an iron ore crushing screening dry separation system to solve above-mentioned problem.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the iron ore crushing, screening and dry separation system sequentially comprises a first-section coarse crushing device, a second-section middle crushing device, an inspection and screening device, a third-section fine crushing device and a dry separation device, wherein the inspection and screening device is a double-layer screen device, the two dry separation devices are respectively a first dry separation device and a second dry separation device, and undersize materials and intermediate materials of the lower layer of the double-layer screen device respectively enter the first dry separation device and the second dry separation device; the method also comprises second double-layer screen equipment, wherein the tailings of the first dry separation equipment enter the second double-layer screen equipment.

As a preferred technical scheme: and the two-section middle crushing equipment and the three-section fine crushing equipment are hydraulic cone crushers.

As a preferred technical scheme: the aperture of the upper layer sieve of the double-layer sieve device is 32mm, the aperture of the lower layer sieve is 15mm, and the sieve pores are square holes.

As a preferred technical scheme: the aperture of the upper layer sieve of the second double-layer sieve equipment is 6mm, and the aperture of the lower layer sieve is 2.5 mm.

As a preferred technical scheme: and the rotating parts of the first-stage coarse crushing equipment, the second-stage medium crushing equipment, the inspection screening equipment and the third-stage fine crushing equipment are provided with safety protection covers.

The method for crushing, screening and dry separating the iron ores by adopting the system adopts the technical scheme that the method comprises the following steps:

(1) after the raw ore is coarsely crushed by a first-stage coarse crushing device and is crushed by a second-stage intermediate crushing device,

(2) the materials are screened by a double-layer screen device,

a) feeding the screened materials on the upper-layer sieve into three sections of fine crushing equipment for fine crushing, and returning the fine crushed materials to the upper layer of the double-layer sieve equipment again;

b) the screened intermediate material enters second dry separation equipment for secondary dry separation, tailings after the secondary dry separation are aggregates with the particle size of 12-31.5, and concentrate after the secondary dry separation returns to third-stage fine crushing equipment;

c) and (3) feeding the screened undersize material of the lower layer into a first dry separation device for primary dry separation, obtaining primary dry separation tailings and primary dry separation concentrate after the primary dry separation, feeding the primary dry separation tailings into a second double-layer screen device for secondary screening, and respectively obtaining 0-2mm waste soil, 2-5mm sand and 5-12mm aggregate after the secondary screening.

The utility model discloses improving screening equipment circle sieve into double-deck screen by the monolevel sieve, screening efficiency is higher, considering that current grit aggregate trade prospect is good, return on investment is high, combine the final finished product granularity requirement of iron ore, so decide double-deck screen upper strata sieve mesh 32mm, lower floor's sieve mesh 15mm, the bold that is greater than 31.5mm on the sieve returns the breaker that breaks in small, intermediate material selects through the dry separation machine earlier, its concentrate returns the breaker that breaks in small, its tailing is sold alone as 12-31.5 mm's aggregate with the bold on the sieve, the broken finished product of minus 12mm under the sieve gets into other dry separators again, its concentrate is final broken finished product, its tailing gets into double-deck circle sieve again, the upper screen mesh is decided as 6mm, the lower floor's sieve mesh is decided as 2.5mm, the upper strata is-12 +5 mm's aggregate, the intermediate material is-5 +2 mm's grit, the lower floor's material is-2 mm's waste soil, aggregate and sand are sold separately.

After improvement, the load of the fine crusher can be greatly reduced, so that the consumption of a lining plate of the fine crusher is reduced, and the crushing cost is saved. The tailings of the middle-31.5 +12mm material after dry separation and the tailings of the crushed-12 mm material after dry separation can be used as building materials after screening, thereby reducing the generation of solid wastes, protecting the environment and bringing objective income for enterprises.

Compared with the prior art, the utility model has the advantages of: the utility model can greatly reduce the load of the fine crusher, thereby reducing the consumption of the lining plate of the crusher, reducing the direct cost of lining plate consumption and replacement to about 2 percent of the crushing cost, greatly saving the crushing cost, reducing the frequency of shutdown and replacement and improving the crushing efficiency; the tailings of the middle-31.5 +12mm material after dry separation and the tailings of the crushed-12 mm material after dry separation can be used as building materials after screening, so that the generation of solid waste is reduced, the environment is protected, and obvious income is brought to enterprises.

Drawings

FIG. 1 is a flow diagram of a crushing and screening dry separation process in the prior art;

fig. 2 is a flow chart of the crushing and screening dry separation process of the embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Examples

Referring to fig. 2, the iron ore crushing, screening and dry separation system sequentially comprises a first-section coarse crushing device (a CJ125 jaw crusher is selected), a second-section middle crushing device (a RC43 single-cylinder hydraulic cone crusher is selected), an inspection and screening device (a 2YA3060 forced circular vibrating screen is selected), a third-section fine crushing device (a RC50 single-cylinder hydraulic cone crusher is selected), and a dry separation device (a double-roller 1030 dry separation machine is selected), wherein the inspection and screening device is a double-layer screen device, the dry separation devices are two, namely a first dry separation device and a second dry separation device, and lower-layer screen underflow and intermediate substances of the double-layer screen device enter the first dry separation device and the second dry separation device respectively; the tailing of the first dry separation equipment enters the second double-layer screen equipment

The aperture of the upper layer sieve of the double-layer sieve device is 32mm, the aperture of the lower layer sieve is 15mm, and the sieve pores are square holes.

The aperture of the upper layer sieve of the second double-layer sieve equipment is 6mm, and the aperture of the lower layer sieve is 2.5 mm;

and the rotating parts of the first-stage coarse crushing equipment, the second-stage medium crushing equipment, the inspection screening equipment and the third-stage fine crushing equipment are provided with safety protection covers.

The method for crushing, screening and dry separating the iron ores by adopting the system comprises the following steps:

(2) the materials are screened by a double-layer screen device,

It should be noted that, unless otherwise specified, all the individual devices of the present invention are available in the art and commercially, and include a vibrating screen with a double-layer screen structure, in which the upper layer is coated with a woven mesh, and the lower layer is coated with polyurethane.

The processing cost of each ton of raw ore before improvement is 5 yuan, the cost of each ton of raw ore after improvement is reduced to 3 yuan, the cost reduction range reaches 40%, and the profit of each ton can be 2 yuan. The annual output of the improved raw ore reaches 256 ten thousand tons, the profit of 2 yuan per ton of raw ore is realized, and 512 ten thousand yuan per year can be realized. Simultaneously because original dry separation tailing is whole to be the waste product, the utility model discloses a but the grit aggregate of dry separation tailing majority production, production grit aggregate 138 ten thousand tons about every year can realize about 1380 ten thousand yuan of extra profit.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an iron ore crushing screening dry separation system, includes in one section coarse crushing equipment, the two-stage process garrulous equipment, inspection screening equipment, three-section fine crushing equipment and dry separation equipment its characterized in that in proper order: the inspection and screening equipment is double-layer screening equipment, the dry separation equipment comprises two dry separation equipment, namely a first dry separation equipment and a second dry separation equipment, and undersize and intermediate matters of the lower layer of the double-layer screening equipment respectively enter the first dry separation equipment and the second dry separation equipment; the method also comprises second double-layer screen equipment, wherein the tailings of the first dry separation equipment enter the second double-layer screen equipment.

2. The iron ore crushing screening dry separation system of claim 1, characterized in that: and the two-section middle crushing equipment and the three-section fine crushing equipment are hydraulic cone crushers.

3. The iron ore crushing screening dry separation system of claim 1, characterized in that: the aperture of the upper layer sieve of the double-layer sieve device is 32mm, the aperture of the lower layer sieve is 15mm, and the sieve pores are square holes.

4. The iron ore crushing screening dry separation system of claim 1, characterized in that: the aperture of the upper layer sieve of the second double-layer sieve equipment is 6mm, and the aperture of the lower layer sieve is 2.5 mm.

5. The iron ore crushing screening dry separation system of claim 1, characterized in that: and the rotating parts of the first-stage coarse crushing equipment, the second-stage medium crushing equipment, the inspection screening equipment and the third-stage fine crushing equipment are provided with safety protection covers.