CN1415419A - Method for milling mine in micro phases and the ball mill - Google Patents
Method for milling mine in micro phases and the ball mill Download PDFInfo
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- CN1415419A CN1415419A CN 02141722 CN02141722A CN1415419A CN 1415419 A CN1415419 A CN 1415419A CN 02141722 CN02141722 CN 02141722 CN 02141722 A CN02141722 A CN 02141722A CN 1415419 A CN1415419 A CN 1415419A
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- liner plate
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- ball mill
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Abstract
A microstaged ore grinding method features that different two linear plates are axially installed to the inner surface of ball grinder for grinding the ore by staged. A waved liner plate is installed to the feeding part of ball grinder for grinding the ore in impact mode. A smooth liner plate is installed to the discharge part of ball grinder for grinding the ore in strap mode. A transition stage is between them. Its advantages are high productivity increased by 12-15%, and saving electric energy.
Description
(1) technical field
The present invention relates to the milling method and the ball mill of ore dressing field, specifically a kind of Micro-stage Grinding method and ball mill.
(2) background technology
Ore grinding is one section the highest operation of ore dressing plant energy consumption, and its energy consumption accounts for the 40%-60% of ore dressing plant total energy consumption, and the quality of grinding efficiency will directly influence ore dressing plant mixed economy technical indicator.In grinding operation, by pulverizing disciplinarian request, the form that varigrained ore materials is pulverized ore grinding has different requirements, the ore grinding stage can be divided into: the corase grind stage, coarse-grained material is imposed bigger impact comminution effect, and promptly leave the formula ore grinding; The fine grinding stage imposes stronger mill stripping pulverization to fine, promptly rushes down the formula ore grinding.At present, stage grinding is used in ore-dressing practices such as molybdenum ore, graphite ore, generally uses many grinding machine segmentation operations.At cement industry, because tube length compares much larger than the ore dressing ball mill with diameter, therefore, can be divided into some bins at axis direction, each bin adds the milling medium of different-diameter respectively, to obtain very thin ore milling product.And for the little Jin Chang that selects, little copper selects factory, plumbous zinc selects factory etc., so far still use a table grinder to finish whole grinding process, and the liner plate of same pattern is installed in the same table grinder, therefore can not well adapt to the different requirements of different phase that ore constantly attenuates from feed end to the discharge end granularity of ball mill to the steel ball pulverised form.Cause grinding efficiency not improve, energy consumption is bigger.
(3) summary of the invention
The object of the present invention is to provide a kind of Micro-stage Grinding method and ball mill, it can be good at adapting to ore grain size from the material feeding end of ball mill to the tapered requirement of discharge end, thereby realized Micro-stage Grinding, and provide a kind of liner plate improved ball mill.Consequently improve ball mill production efficiency, and saved the energy.
A kind of Micro-stage Grinding method by the present invention's proposition, because of in a table grinder, being no less than two kinds of liner plates that surface configuration is different along the installation of tubular axis direction, cause the ground form different stage by stage to ore, the wave mode liner plate of on cylindrical shell feed end inwall, installing, make the interior steel ball of cylindrical shell cause the higher height of throwing, produce bigger impact comminution effect, be and leave the formula ore grinding stage, make thick lump material be ground into particulate; The smooth type liner plate of installing on the discharge end inwall makes the height that steel ball takes up in the cylindrical shell lower, produces stronger mill stripping pulverization, is and rushes down the formula ore grinding stage, makes fine be ground carefullyyer.Two the little stages of ore grinding between the stage are transition stages.
By a kind of ball mill that the present invention proposes, the liner plate of its cylinder inboard wall has carried out the combined type installation, and present embodiment is by two kinds of shape liner plate narrations are installed, in cylindrical shell feed end A district, along the tubular axis direction 3-7 row wave mode liner plate is installed,, 3-6 row smooth type liner plate is installed in cylindrical shell discharge end B district.
Below in conjunction with drawings and Examples the present invention is explained in detail.
It is generally acknowledged, the height of ore grinding crush efficiency depends on the motion state of milling medium, the size of pack into media quantity and medium, when the size of the quantity of medium and medium according to production experience under the fixed condition, the motion state of milling medium is exactly the decisive factor of grinding efficiency height.Milling medium is generally steel ball or rod iron.The motion state of steel ball depends primarily on mill speed, shell liner surface configuration in the grinding machine.Present widely used ball mill, under the situation that shell liner surface configuration unanimity, rotating speed are fixed, the duty of grinding machine is commonly " leaving formula " grinding mode.
Micro-stage Grinding method of the present invention promptly in same table grinder, is no less than two kinds of shell liners with different surfaces shape along the installation of tubular axis direction at least, and ground form is changed along axis direction.At feed end the wave mode liner plate is installed, is formed higher steel ball and leave height.Generation is based on the ground form of impact comminution; At discharge end the smooth type liner plate is installed, is formed lower steel ball and leave height, produce the ground form of pulverizing based on the mill stripping; Interstage is in the transition state of two kinds of forms.Thereby the grinding process micro phase that in same table grinder, takes place.Can adapt to the needs of the different shredding stages of ore materials so better, meet the pulverizing rule of ore, thereby improve grinding efficiency different milling action forms.
Figure 1 shows that ball mill barrel liner plate expanded view of the present invention, this cylindrical shell is the total plurality of rows liner plate of a-a vertically, in cylindrical shell feed end A district, 3-7 row wave mode liner plate (1) is installed, and in cylindrical shell discharge end B district, 3-6 row smooth type liner plate (2) is installed.Liner plate is square or strip by the potassium steel manufacturing, and present embodiment is square.The wave mode liner plate as shown in Figure 2, its surface is in mid portion projection gently, thin all around thick middle, around the thickness in middle thickness (3) is about 2 times of edge (4) thickness, in the centre of every block of liner plate, be provided with screw (5), by screw every block of liner plate is arranged and be fixed on the cylinder inboard wall.The radian at the every liner plate back side and the radian of cylinder inboard wall match.The smooth type liner plate as shown in Figure 3, its surface is level and smooth arc, mid portion is projection slightly, in the centre of every block of liner plate, is provided with screw (5), by screw will every the liner plate arrangement be fixed on the cylinder inboard wall.The radian at the every liner plate back side and the radian of cylinder inboard wall match.Like this, the combined type liner plate of ball mill is arranged and is installed.
When if shell liner is bar shaped, the width that unsmooth bar scaleboard is installed in feed end A district accounts for the 60%-80% of cylindrical shell length, bar scaleboard is changed into smooth type in discharge end B district, and it spends the wide 20%-40% that accounts for cylindrical shell length, and there is wave heave on unsmooth bar scaleboard surface.
Use Micro-stage Grinding method provided by the invention and the ball mill of combined type liner plate is installed, should be according to different ore character, determine the installation row number of two kinds of different types liner plates, adjust the running parameter of ball mill, as ore milling concentration, classification effluent concentration etc.After adopting the present invention, at mog is under the constant prerequisite of grinding machine operating current, the production capacity of ball mill can be improved more than the 12%-15%, thereby reduce the ore grinding unit power consumption more than 15%, reduced flotation, the power consumption of concentrate and tailings system and the consumption of standby redundancy simultaneously.
The present invention is simple to existing ore grinding technological transformation, and small investment is produced effects obviously.Ore grinding principle of the present invention more meets the objective law that ore is pulverized, and can be adapted to the grinding process of various ore materials, is the energy-saving and cost-reducing effective way in mine.
(4) description of drawings
Accompanying drawing 1 is the axial expanded view of ball mill barrel inwall combined type liner plate of the present invention, has "+" mark person to be the wave mode liner plate among the figure on the liner plate, and all the other are the smooth type liner plate.
Accompanying drawing 2 is the wave mode liner plate en-block construction schematic diagram in the combined type liner plate of the present invention.
Accompanying drawing 3 is the smooth type liner plate en-block construction schematic diagram in the combined type liner plate of the present invention.
(5) specific embodiment
[embodiment 1] uses the ball mill model to be MQY2700 * 3600, in cylindrical shell, have 9 row's liner plates along axis direction, 5 rows that are positioned at feed end install the wave mode liner plate, 4 rows that are positioned at discharge end install the smooth type liner plate, it is implemented the Micro-stage Grinding technical method, raw ore is selected the vessel slag of copper smelting plant for use, ore milling concentration is controlled at 85%-86%, the classification effluent concentration is controlled at 50%-52%, and drum's speed of rotation is 18-23 rev/min, steel ball size: Φ 100, Φ 75, Φ 50, and Φ 25, steel ball matching: 2: 3: 3: 2.Through running in 8 months, its result and whole grinding machine used same type of liner plate (all using the wave mode liner plate before the enforcement) to compare as follows:
| Time | Head grade (%) | Concentrate grade (%) | Tailings grade (%) | The rate of recovery (%) | The ore grinding platform is imitated (T/h) | Primary grinding fineness-200 order accounts for (%) |
| Before the enforcement | ??3.253 | 27.24 | 0.54 | 85.09 | 14.72 | 82.69 |
| After the enforcement | ??2.97 | 26.78 | 0.507 | 84.58 | 17.02 | 82.13 |
As can be seen from the above table, implement Micro-stage Grinding method of the present invention and ball mill after, the grinding machine disposal ability by original 14.72 tons/time, bring up to 17.02 tons/time, its treating capacity has improved 15.628%.Measure 80,000 tons by handling the ore deposit platform machine year, 77.1 ten thousand KWh that can economize on electricity add the standby redundancy loss of saving, reduce production costs 550,000 yuan the whole year.
[embodiment 2] use the ball mill model to be MQG2700 * 3600, and along having 9 row's liner plates aspect the axis, 5 rows that are positioned at feed end install the wave mode liner plate in cylindrical shell, and 4 rows that are positioned at discharge end install the smooth type liner plate, and it is implemented the Micro-stage Grinding technical method.Raw ore is selected copper mine stone for use, and ore milling concentration is controlled at about 82%, and the classification effluent concentration is controlled at about 40%, and drum's speed of rotation is 18-23 rev/min, steel ball size: Φ 125, and Φ 100, and Φ 75, and Φ 50, steel ball matching: 2: 3: 3: 2.Through running in 3 months, its result and whole grinding machine used same type of liner plate (all using the wave mode liner plate before the enforcement) to compare as follows:
| Time | Head grade (%) | Concentrate grade (%) | Tailings grade (%) | The rate of recovery (%) | The ore grinding platform is imitated (T/h) | Primary grinding fineness-200 order accounts for (%) |
| Before the enforcement | 1.01 | 23 | 0.06 | 94.3 | 28.1 | 58 |
| After the enforcement | 0.98 | 22.8 | 0.057 | 94.42 | 31.47 | 59 |
As can be seen from the above table, implement the present invention after, the grinding machine disposal ability by original 28.1 tons/time bring up to 31.47 tons/time, its treating capacity improves 12%.Measure 22.3 ten thousand tons by handling the ore deposit platform machine year, 800,000 KWh that can economize on electricity add the standby redundancy loss of saving, year reduce production costs 600,000 yuan.
Claims (4)
1, a kind of milling method of micro phase, it is characterized by in same table grinder, be no less than two kinds of liner plates that surface configuration is different along the installation of tubular axis direction, cause the ground form different stage by stage to ore, the wave mode liner plate of on cylindrical shell feed end inwall, installing, steel ball in the cylindrical shell is caused higher throw highly generation, be and leave the formula ore grinding stage, make thick lump material be ground into particulate based on the ground form of impact comminution; The smooth type liner plate of installing on the discharge end inwall makes the height that steel ball takes up in the cylindrical shell lower, produces the ground form of pulverizing based on the mill stripping, is and rushes down the formula ore grinding stage, makes fine be ground carefullyyer; Between two ore grinding stages is transition stage.
2, by the used ball mill of the described Micro-stage Grinding method of claim 1, the liner plate that it is characterized by at the ball mill barrel inwall has carried out the combined type installation, along axis direction, at feed end 3-7 row wave mode liner plate is installed, at discharge end 3-6 row smooth type liner plate is installed.
3, by the described ball mill combined type of claim 2 liner plate, the mid portion that it is characterized by wave mode liner plate surface is projection gently, thin all around thick middle, around the thickness in middle thickness is about 2 times of edge thickness; Smooth type liner plate surface is level and smooth arc, and mid portion is projection slightly.
4, by the described ball mill combined type of claim 2 liner plate, when shell liner was bar shaped, the width of unsmooth bar scaleboard being installed at feed end accounted for the 60%-80% of cylindrical shell length; Change into smooth type at the discharge end bar scaleboard, its width accounts for the 20%-40% of cylindrical shell length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02141722 CN1415419A (en) | 2002-08-30 | 2002-08-30 | Method for milling mine in micro phases and the ball mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02141722 CN1415419A (en) | 2002-08-30 | 2002-08-30 | Method for milling mine in micro phases and the ball mill |
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| CN1415419A true CN1415419A (en) | 2003-05-07 |
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| CN 02141722 Pending CN1415419A (en) | 2002-08-30 | 2002-08-30 | Method for milling mine in micro phases and the ball mill |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537345A (en) * | 2013-10-29 | 2014-01-29 | 铜陵市大明玛钢有限责任公司 | Back-polishing type feed end lining board for ball grinder |
| CN103846130A (en) * | 2014-03-12 | 2014-06-11 | 瓮福（集团）有限责任公司 | Ore grinding method |
| CN106914316A (en) * | 2017-03-14 | 2017-07-04 | 贵州大学 | A kind of grinding mill liner structure and its assemble method |
| CN114273027A (en) * | 2021-12-01 | 2022-04-05 | 铜陵有色金属集团铜冠建筑安装股份有限公司 | Method for eliminating gap of magnetic lining plate of ball milling barrel |
-
2002
- 2002-08-30 CN CN 02141722 patent/CN1415419A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537345A (en) * | 2013-10-29 | 2014-01-29 | 铜陵市大明玛钢有限责任公司 | Back-polishing type feed end lining board for ball grinder |
| CN103846130A (en) * | 2014-03-12 | 2014-06-11 | 瓮福（集团）有限责任公司 | Ore grinding method |
| CN103846130B (en) * | 2014-03-12 | 2015-12-02 | 瓮福（集团）有限责任公司 | A kind of milling method |
| CN106914316A (en) * | 2017-03-14 | 2017-07-04 | 贵州大学 | A kind of grinding mill liner structure and its assemble method |
| CN114273027A (en) * | 2021-12-01 | 2022-04-05 | 铜陵有色金属集团铜冠建筑安装股份有限公司 | Method for eliminating gap of magnetic lining plate of ball milling barrel |
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