CN105251572A - Novel ore grinding classification system and process - Google Patents
Novel ore grinding classification system and process Download PDFInfo
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- CN105251572A CN105251572A CN201510693951.6A CN201510693951A CN105251572A CN 105251572 A CN105251572 A CN 105251572A CN 201510693951 A CN201510693951 A CN 201510693951A CN 105251572 A CN105251572 A CN 105251572A
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Abstract
The invention relates to a novel ore grinding classification system and process. The classification system is mainly composed of a semi-autogenous mill, a pump pool, a slurry pump and a high-frequency fine screen. The classification process mainly comprises the steps that 1, crushed ore is fed into the semi-autogenous mill through a belt conveyor; 2, ore pulp generated after autogenous grinding is carried out through the semi-autogenous mill is discharged into the pump pool; 3, the ore pulp in the pump pool is conveyed into the high-frequency fine screen on a high platform through the slurry pump; and 4, qualified-granularity ore charge screened by the high-frequency fine screen flows into next equipment from an outlet for operating, ore charge with the granularity exceeding the standard flows by itself through a chute or pipeline on the high-frequency fine screen to return to the semi-autogenous mill, ore grinding continues to be carried out, and a closed cycle is formed by the high-frequency fine screen and the semi-autogenous mill. According to the process, the semi-autogenous mill and the high-frequency fine screen are adopted, geometrical classification is used for replacing traditional gravity classification, so that classification precision is improved, the ore grinding circulating volume is reduced, and the ore grinding effect is improved. The novel ore grinding classification system and process can be suitable for the conditions that the mud and water content of ore is high, and the requirement for the product granularity is low.
Description
Technical field
The present invention relates to a kind of grinding grading technique, particularly a kind ofly adopt the Semi-Autogenous novel grinding grading technique in conjunction with high frequency fine screen of single hop.
Background technology
In ore dressing plant, the investment of comminution part and energy consumption account for 50 ~ 60% of the investment of whole ore dressing plant and energy consumption, and some selects factory even higher, may up to 70%.Along with the exhaustion of rich ore geological resource in the world, a large amount of lean ore enters the visual field of people, and the scale in ore dressing plant is also in continuous growth; Along with the appearance of the continuous progress of technology and the development of comminution theory and equipment enlarging and novel device, how according to item types and scale, ore properties and follow-up dressing and smelting process to the factor such as requirement, comminution cost of product granularity, select an economical rationality, the comminution flow process of advanced technology just seems particularly important.
In ore dressing plant, usually adopt ball mill or rod mill to carry out ore grinding, but there is the shortcomings such as feed preparation unit size is little, energy consumption is high, the easy pulverizing excessively of ore particle.And grinding circuit generally adopts hydrocyclone or spiral classifier to carry out classification, screw classifying and hydrocyclone be all a kind of by particles settling rule to carry out the equipment of classification, classification efficiency is low, effectiveness of classification is poor, to inevitably be mingled with a large amount of particulates in its sand setting, and in overflow, be often mixed with the particle that proportion is comparatively light and granularity is larger.Especially, when running into ore and being thicker containing high, the product granularity requirement of mud water content, above technique is used all can not to reach good effect.
Summary of the invention
The object of invention is that a kind of novel grinding classification system that provides and technique can be applicable to that ore is high containing mud water content, product granularity requires thicker situation preferably, this grinding classification system by single hop Semi-Autogenous+high frequency fine screen forms." geometry classification " is used to replace traditional " gravity classification ", improve effectiveness of classification, reduce ore grinding internal circulating load, improve grinding efficiency, particularly when ore is high containing mud water content, product granularity requires thicker, flow process unimpeded and simple flow, minimizing grinding machine internal circulating load can be ensured, improve device processes ability, reduce production cost, thus obtain better economic benefit.
For achieving the above object, the present invention is achieved through the following technical solutions:
A novel grinding classification system, mainly comprises:
For the semi-autogenous mill of ore grinding;
Be arranged on the pump pond in semi-autogenous mill exit;
For the Pulp pump of the high frequency fine screen by the ore pulp feeding in pump pond;
And the high frequency fine screen that can carry out classification by ore particle size be arranged on high platform;
Described high frequency fine screen arranges two outlets, and one is the ore particle flow export that exceeds standard, and this outlet is linked into semi-autogenous mill by chute or pipeline and forms closed circuit, and another is then qualified ore particle flow export.
Further, described high frequency fine screen is provided with the adjustable screen cloth of screen size, and described high frequency fine screen is preferably straight line shaker.
A novel grinding grading technique, is characterized in that, comprises following step:
Ore after step 1, fragmentation feeds semi-autogenous mill by rubber conveyer;
Step 2, the ore pulp carrying out generating after autogenous grinding process through semi-autogenous mill enter pump pond;
Step 3, by Pulp pump, the ore pulp in pump pond is sent in the high frequency fine screen on high platform;
Step 4, through high frequency fine screen screening after release mesh mineral aggregate from outlet flow into next equipment availability, the mineral aggregate that granularity exceeds standard then by the chute on high frequency fine screen or pipeline gravity flow return semi-autogenous mill continue ore grinding, form closed cycle with semi-autogenous mill.
Further, the release mesh in step 4 controls at 0.4 ~ 0.6mm.
Further, the one section of muck step arranged before being also included in step 1.
further, ore grinding cycling rate in step 1 controls within 100%.
Further, in step 2, the steel ball being no more than 8% is added in semi-autogenous mill.
The present invention has the following advantages compared to existing technology:
(1) selection of grinding attachment: adopt semi-autogenous mill, semi-autogenous mill has following advantage compared with rod mill, ball mill:
A. feed preparation unit size is large
The maximum feed preparation unit size of semi-autogenous mill generally can reach 250mm, and the feed preparation unit size of super-huge semi-autogenous mill even can reach 350mm.Before semi-autogenous mill, only one section of muck need be set, simplify muck work flow.
B. energy consumption is low
Its effect made full use of between ore and ore reaches comminution effect, adds the steel ball of a small amount of (being generally no more than 8%) in order to eliminate " difficult abrasive particle ".
C. pulverizing ore particle is crossed few
The grinding process of semi-autogenous mill has Selective grinding effect, and the pulverizing ore particle excessively that a small amount of steel ball causes is less.
(2) efficient, digitlization classifying equipoment is adopted
High frequency fine screen is a kind of mature equipment by ore particle size fractionation, conventional gravity classification technique is replaced with geometry grading technology, classification efficiency is high, effectiveness of classification is high, ore grinding cycling rate is controlled within 100%, improve the disposal ability of grinding machine, and high frequency fine screen also can adjust screen mesh size according to need of production, change partition size, build grinding process flexibly.
Accompanying drawing explanation
Fig. 1 is a kind of novel grinding grading technique flow chart of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, a kind of novel grinding classification system, mainly comprises:
For the semi-autogenous mill 1 of ore grinding;
Be arranged on the pump pond 2 in semi-autogenous mill exit;
For the Pulp pump 3 of the high frequency fine screen by the ore pulp feeding in pump pond;
And the high frequency fine screen 4 that can carry out classification by ore particle size be arranged on high platform;
Described high frequency fine screen 4 arranges two outlets, and one is connected to form closed circuit by chute or pipeline and semi-autogenous mill for the ore particle flow export that exceeds standard, and another is then qualified ore particle flow export.The screen cloth of described high frequency fine screen is the screen cloth of adjustable sieve hole dimension, and suggestion preferably adopts straight line shaker.
Ore after fragmentation feeds semi-autogenous mill 1 by rubber conveyer, the gravity flow of semi-autogenous mill 1 discharge enters pump pond 2, then by Pulp pump 3, the ore pulp after mill is sent into high frequency fine screen 4, high frequency fine screen 4 is arranged on higher platform, its on-the-sieve material is flow automatically and is returned semi-autogenous mill 1 by sieving upper chute (or pipeline) and continue ore grinding, form closed cycle with semi-autogenous mill 1, on sieve, qualified material is then flow automatically and is entered next and do one's assignment.
Embodiment 1:
The high grade copper oxide ore of this copper mine process, the mineral of cupric are mainly malachite and chrysocolla, and copper mainly exists with cupric oxide form.Ore weathering is serious, and moisture containing mud, the hardness factor f value of ore is 6 ~ 10, and ball milling work index BWI, also below 10, belongs to easy broken ore.The leaching experiment result of ore shows: when ore grain size reach-0.5mm account for 80% time, the leaching rate of copper can reach more than 90%, and along with mog is thinner, leaching rate change is less, therefore, leaching granularity is defined as-0.5mm and accounts for 80%.Because the grind grading granularity of the relatively traditional ore dressing plant of product granularity or hydrometallurgy factory is thicker, in line with reducing investment outlay and reducing the principle of production and operation expense, have employed grinding grading technique of the present invention, achieve good effect: the circulating load of on-the-spot semi-autogenous mill controls below 80%, the treating capacity of separate unit Φ 5500 × 1800 semi-autogenous mill (installed power is 800kw) reaches nearly 2400t/d, greatly improve the disposal ability of semi-autogenous mill, reduce energy consumption and steel consumes, improve the performance of enterprises.
Claims (7)
1. a novel grinding classification system, is characterized in that, mainly comprises:
For the semi-autogenous mill of ore grinding;
Be arranged on the pump pond in semi-autogenous mill exit;
For the Pulp pump of the high frequency fine screen by the ore pulp feeding in pump pond;
And the high frequency fine screen that can carry out classification by ore particle size be arranged on high platform;
Described high frequency fine screen arranges two outlets, and one is the ore particle flow export that exceeds standard, and this outlet is linked into semi-autogenous mill by chute or pipeline and forms closed circuit, and another is then qualified ore particle flow export.
2. a kind of novel grinding classification system according to claim 1, is characterized in that, described high frequency fine screen is provided with the adjustable screen cloth of screen size, and described high frequency fine screen is preferably straight line shaker.
3. a novel grinding grading technique, uses the grinding classification system described in claim 1 or 2, it is characterized in that, comprise following step:
Ore after step 1, fragmentation feeds semi-autogenous mill by rubber conveyer;
Step 2, the ore pulp carrying out generating after autogenous grinding process through semi-autogenous mill enter pump pond;
Step 3, by Pulp pump, the ore pulp in pump pond is sent in the high frequency fine screen on high platform;
Step 4, through high frequency fine screen screening after release mesh mineral aggregate from outlet flow into next equipment availability, the mineral aggregate that granularity exceeds standard then by the chute on high frequency fine screen or pipeline gravity flow return semi-autogenous mill continue ore grinding, form closed cycle with semi-autogenous mill.
4. a kind of novel grinding grading technique according to claim 3, is characterized in that, the mineral aggregate granule size of the release mesh in described step 4 is 0.4 ~ 0.6mm.
5. a kind of novel grinding grading technique according to claim 3, is characterized in that, the one section of muck step arranged before being also included in step 1.
6. a kind of novel grinding grading technique according to claim 3, is characterized in that, ore grinding cycling rate in step 1 controls within 100%.
7. a kind of novel grinding grading technique according to claim 3, is characterized in that, in step 2, adds the steel ball being no more than 8% in semi-autogenous mill.
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| CN201510693951.6A CN105251572A (en) | 2015-10-25 | 2015-10-25 | Novel ore grinding classification system and process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179954A (en) * | 2016-09-07 | 2016-12-07 | 武汉科技大学 | A kind of ore pulp wet vibration screen system and using method thereof |
| CN107649252A (en) * | 2017-10-19 | 2018-02-02 | 中冶北方（大连）工程技术有限公司 | A kind of magnetic iron ore semi-autogenous mill circulating load process for discarding tailings |
| CN108525835A (en) * | 2018-05-18 | 2018-09-14 | 玉溪大红山矿业有限公司 | A kind of method and its system of continuous removal semi-autogenous mill abrasion steel ball |
| CN112473991A (en) * | 2020-11-23 | 2021-03-12 | 江西铜业集团东同矿业有限责任公司 | Novel semi-autogenous grinding one-stage closed circuit grinding production process |
| CN112517164A (en) * | 2020-12-16 | 2021-03-19 | 彝良驰宏矿业有限公司 | Ball mill discharging device |
| CN113492055A (en) * | 2020-04-02 | 2021-10-12 | 中国瑞林工程技术股份有限公司 | Mineral processing technology for treating copper-containing pyrite |
| CN115106177A (en) * | 2022-06-23 | 2022-09-27 | 中国瑞林工程技术股份有限公司 | Platinum ore grinding and grading system and grading process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179954A (en) * | 2016-09-07 | 2016-12-07 | 武汉科技大学 | A kind of ore pulp wet vibration screen system and using method thereof |
| CN107649252A (en) * | 2017-10-19 | 2018-02-02 | 中冶北方（大连）工程技术有限公司 | A kind of magnetic iron ore semi-autogenous mill circulating load process for discarding tailings |
| CN108525835A (en) * | 2018-05-18 | 2018-09-14 | 玉溪大红山矿业有限公司 | A kind of method and its system of continuous removal semi-autogenous mill abrasion steel ball |
| CN113492055A (en) * | 2020-04-02 | 2021-10-12 | 中国瑞林工程技术股份有限公司 | Mineral processing technology for treating copper-containing pyrite |
| CN112473991A (en) * | 2020-11-23 | 2021-03-12 | 江西铜业集团东同矿业有限责任公司 | Novel semi-autogenous grinding one-stage closed circuit grinding production process |
| CN112473991B (en) * | 2020-11-23 | 2022-01-14 | 江西铜业集团东同矿业有限责任公司 | Novel semi-autogenous grinding one-stage closed circuit grinding production process |
| CN112517164A (en) * | 2020-12-16 | 2021-03-19 | 彝良驰宏矿业有限公司 | Ball mill discharging device |
| CN115106177A (en) * | 2022-06-23 | 2022-09-27 | 中国瑞林工程技术股份有限公司 | Platinum ore grinding and grading system and grading process |
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Application publication date: 20160120 |
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