CN107312499A - A kind of ball mill metal and Ceramic Composite abrasive media and preparation method thereof - Google Patents
A kind of ball mill metal and Ceramic Composite abrasive media and preparation method thereof Download PDFInfo
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- CN107312499A CN107312499A CN201710586743.5A CN201710586743A CN107312499A CN 107312499 A CN107312499 A CN 107312499A CN 201710586743 A CN201710586743 A CN 201710586743A CN 107312499 A CN107312499 A CN 107312499A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1436—Composite particles, e.g. coated particles
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
Abstract
A kind of ball mill metal and Ceramic Composite abrasive media and preparation method thereof, the abrasive media include metal inner core and the outer ceramic layer being coated on metal inner core outer peripheral face.In the present invention, outer ceramic layer is sequentially provided with prefabricated ceramic layer, alumina ceramic layer I and alumina ceramic layer II along the direction that the interior close to metal inner core extends.The present invention by metal with Ceramic bond together with, but separate, abrasive media use " rice dumpling " formula structure, outer layer（Skin）For existing ceramic grinding body material, centre（Filling）For metal material, because the density of abrasive body ceramic layer is small, and the density of cast iron materials is big, and the thickness of different " skins " and the size of " filling " can be designed after the two combination, reaches change grinding volume density size purpose.
Description
Technical field
The present invention relates to powder processing engineering technology field, and in particular to a kind of ball mill metal is ground with Ceramic Composite
Medium and preparation method thereof.
Background technology
Due to the product particle pattern subglobular of ball mill grinding, meet the technical requirements of powder product, so ball milling
Machine is that powder processes the most frequently used equipment.With the development of science and technology, higher requirement is it is also proposed to Powder Processing Technology in China,
Particularly performance indications of abrasive body, it is desirable to which the powder granule pattern of grinding is suitable, the smaller level of particle diameter is with reasonable；And the energy of grinding
Consumption is lower.
At present, abrasive body majority is metal used in China's ball mill（Steel, iron）Abrasive body（Especially in cement industry）, that is, lead to
Often using steel ball, steel section, because ball mill useful work is low, only 3% is used for grinding material, accordingly, there exist ball mill power consumption it is high,
Grind interior temperature and go out to grind the problems such as product temperature is high, so as to cause production cost is high-quality not reach technical requirements.
At present, existing high-performance ceramic abrasive body（Toughness reinforcing, wear-resisting etc.）Used in ball mill, it is close due to ceramic grinding body
Degree（The density of ceramic grinding body is 3.657.8g/cm3）Compared with the density of metallic iron（The density of iron is 7.8g/cm3）It is much smaller,
Under the conditions of the identical or slightly higher filling rate of ceramic grinding body, the Weight Loaded of ceramic grinding body is only the 50 ~ 60% of metal, therefore,
The power consumption of ball mill（Running current declines 30% or so）5kw.h/t or so is reduced, is that the energy-saving technology that provides of enterprise is protected
Card.
But from current produce reality, it is found that ceramic grinding body has problems with：Because ceramic grinding volume density is inclined
Small, the grainding capacity of abrasive body is low compared with metal grinding body, the production capacity reduction of grinding machine；When the performance of material（Material grindability
It is deteriorated, granularity becomes big）When changing, the yield of grinding machine and the stability of quality are poor, and amplitude of variation is larger.Ceramic grinding body
Abrasive action is only played at present, it is desirable to which the granularity of grinding material is smaller, used in two storehouses or three storehouses of grinding machine, the adaptation model of grinding material
Enclose narrow, when raw meal particle size changes, larger fluctuation all occurs for the yield and product quality of grinding machine；In addition, ceramic grinding body
Production cost is high, and price is more much higher than metal grinding body, influences its popularization and application in production.If promoting ceramic grinding
The use of body, it is necessary to change performance indications-density of current ceramic grinding body.
The content of the invention
The present invention is in order to overcome the deficiencies in the prior art, and an object of the present invention is to provide a kind of ball mill and used
Metal and Ceramic Composite abrasive media, the multiple grinding medium have the high-wearing feature and metal grinding body proportion of ceramic grinding body concurrently
Greatly, the advantage that density is adjustable, grinding efficiency is high, while also reducing abrasive body production cost.
The second object of the present invention is to provide the preparation method of a kind of ball mill metal and Ceramic Composite abrasive media.
The present invention for overcome the technical scheme that the deficiencies in the prior art are used for：A kind of ball mill is situated between with multiple grinding
Matter, the abrasive media includes metal inner core and the outer ceramic layer being coated on metal inner core outer peripheral face, the material of the metal inner core
Matter is steel or irony.
Outer ceramic layer is sequentially provided with prefabricated ceramic layer, aluminum oxide along the direction that the interior close to metal inner core extends
Ceramic layer I and alumina ceramic layer II, the radial thickness of prefabricated ceramic layer is 0.1 ~ 0.2mm, alumina ceramic layer I and aluminum oxide
The ratio of the radial thickness of ceramic layer II is 1：5~10.
In the present invention, the raw material of prefabricated ceramic layer is made up of Ludox, aluminum oxide and aluminium dihydrogen phosphate, the weight of each raw material
Than for Ludox：Aluminum oxide：Aluminium dihydrogen phosphate=15 ~ 20：50~70：10 ~ 35, wherein, the aluminum oxide in raw material is alumina powder
Or alumina fibre.
In the present invention, the raw material of alumina ceramic layer I is made up of Ludox, polyvinyl alcohol, iron powder and alumina powder, its
In, the weight ratio of iron powder and alumina powder is, iron powder：Alumina powder=50 ~ 80：20~50；The weight of polyvinyl alcohol accounts for iron
Powder and the percentage of alumina powder gross weight are 0.2 ~ 5%；The weight of Ludox accounts for the hundred of iron powder and alumina powder gross weight
It is 1 ~ 10% to divide ratio.
In the present invention, the raw material of alumina ceramic layer II is made up of Ludox, additive, alumina powder and mineralizer, its
In, alumina powder is based on 100%, and the weight of Ludox is the 1 ~ 10% of alumina powder weight, and the weight of additive accounts for alumina powder
The 0.2 ~ 5% of weight, the weight of mineralizer accounts for the 0.05 ~ 5% of alumina powder weight.
Further, described additive is polyvinyl alcohol or waterglass, described mineralizer is yittrium oxide, magnesia or
Calcium oxide, the granularity of alumina powder is 2 ~ 60 μm.
The preparation method of a kind of ball mill metal and Ceramic Composite abrasive media, comprises the following steps：
Step 1: existing metal grinding media is taken as metal inner core, it is standby after its outer surface is polished；
Step 2: metal inner core outer peripheral face after step one is handled coats prefabricated ceramic layer, dry 5 at 30 ~ 85 DEG C ~
After 60min, oxygenerating aluminium ceramic layer I is wrapped up in the outer peripheral face of prefabricated ceramic layer；
Step 3: oxygenerating aluminium ceramic layer II is wrapped up in the outer peripheral face of alumina ceramic layer I again, system compressing using isostatic pressed
It is standby into base substrate；
Step 4: compressing base substrate is put into high temperature kiln, it is fired, is warming up to 5 DEG C/min heating rate
At 1250 ~ 1450 DEG C, it is incubated at this temperature after 30 ~ 90min, natural cooling annealing obtains abrasive media.
Further, the preparation method of prefabricated ceramic layer is：The raw material of prefabricated ceramic layer by liquid Ludox, aluminum oxide and
Aluminium dihydrogen phosphate is constituted, according to liquid Ludox：Aluminum oxide：Aluminium dihydrogen phosphate=15 ~ 20：50~70：10 ~ 35 weight ratio is successively
Each raw material is weighed, aluminum oxide and aluminium dihydrogen phosphate are added in liquid Ludox, pasty state slurry is made, after being mixed evenly,
Metal inner core outer peripheral face is coated in, prefabricated ceramic layer is made；Wherein, the aluminum oxide in raw material is that alumina powder or aluminum oxide are fine
Dimension.
Further, the raw material of alumina ceramic layer I is by liquid Ludox, polyvinyl alcohol, iron powder and alumina powder group
Into, wherein, the weight ratio of iron powder and alumina powder is that granularity is 20 ~ 60 μm of iron powder：Granularity is 20 ~ 80 μm of aluminum oxide
Powder=50 ~ 80：20~50；It is 0.2 ~ 5% that the weight of polyvinyl alcohol, which accounts for iron powder and the percentage of alumina powder gross weight,；Liquid
It is 1 ~ 10% that the weight of Ludox, which accounts for iron powder and the percentage of alumina powder gross weight,.
Further, the raw material of alumina ceramic layer II is 2 ~ 60 by liquid Ludox, polyvinyl alcohol, yittrium oxide and granularity
μm alumina powder composition, wherein, alumina powder is based on 100%, and the weight of liquid Ludox is the 1 ~ 10% of alumina powder weight,
The weight of additive accounts for the 0.2 ~ 5% of alumina powder weight, and the weight of mineralizer accounts for the 0.05 ~ 5% of alumina powder weight；Described
Additive is polyvinyl alcohol or waterglass, and described mineralizer is yittrium oxide, magnesia or calcium oxide.
The ceramic dielectric of the application can need the density reached according to abrasive body, determine metal material in actual use
Material（Filling）Size, the thickness ratio of alumina ceramic layer I and alumina ceramic layer II.First in metal material（Filling）Outer layer is applied
Prefabricated ceramic layer, alumina ceramic layer I and alumina ceramic layer II are covered, finally ceramic material is processed by current practice, is molded,
Calcining.
Contain Ludox in prefabricated ceramic layer, alumina ceramic layer I and the alumina ceramic layer II of the present invention, firing
When, the gelation of Ludox is formed on alumina powder surface to be coated, and is reacted with aluminum oxide, is generated mullite, is promoted
The densification of aluminium oxide ceramics.And Ludox is combined with polyvinyl alcohol, forms cross-linked network, is adsorbed on the wall of hole, is carried
The adhesion strength of high alumina ceramic layer I and alumina ceramic layer II；Meanwhile, the cross-linked network is evenly distributed on "-Si-O-
In Si- " skeleton structures space, it can be buffered the contraction of outer ceramic layer when base substrate is fired and is cooled down.
Beneficial effect：The present invention by metal with Ceramic bond together with, but separate, abrasive media use " rice dumpling "
Formula structure, outer layer（Skin）For existing ceramic grinding body material, centre（Filling）It is close due to abrasive body ceramic layer for metal material
Degree is small, and the density of cast iron materials is big, and the thickness of different " skins " and the size of " filling " can be designed after the two combination, reaches basis
Need to change grinding volume density size purpose.
The present invention has been suitably added the transition zone of iron powder and alumina powder mixing, Ke Yishi in alumina ceramic layer I
When buffering is because in sintering process, the stress caused by expansion is inconsistent is burnt till, iron powder meeting and aluminum oxide at 1250 ~ 1450 DEG C
There is liquid-phase sintering, increase metal inner core and the adaptability of outer ceramic layer, be not in the phenomenon in internal layer space.
The present invention is with density is larger, price is relatively low metal（Steel, iron）Ball is as kernel, and being coated outside kernel to make
For the ceramic material of abrasive media, the multiple grinding medium being made is set to have the wearability and similar gold of aluminium oxide ceramics abrasive body concurrently
Category grinding volume density, overcome existing aluminium oxide ceramic ball density it is small, to grinding material bad adaptability the problems such as.In same volume
Abrasive media（Filling rate is identical）On the premise of, due to the density increase of the multiple grinding medium of the present invention, so as to improve mill
The mill efficiency of machine.
Brief description of the drawings
Fig. 1 is spherical multiple grinding medium of the invention.
Reference：1st, metal inner core, 2, prefabricated ceramic layer, 3, alumina ceramic layer I, 4, alumina ceramic layer II.
Embodiment
With reference to specific embodiment, the invention will be further described, so that those skilled in the art can be more preferable
Understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
A kind of ball mill metal and Ceramic Composite abrasive media, the abrasive media include metal inner core and are coated on gold
Belong to the outer ceramic layer on kernel outer peripheral face.Wherein, the material of the metal inner core is steel or irony；Outer ceramic layer is along close to metal
The direction of the interior extension of kernel is sequentially provided with prefabricated ceramic layer, alumina ceramic layer I and alumina ceramic layer II, in advance
The radial thickness of potting enamel coating is 0.1 ~ 0.2mm, and the ratio of the radial thickness of alumina ceramic layer I and alumina ceramic layer II is
1：5~10.
In the present invention, preformed layer is easily adhered in order that obtaining alumina ceramic layer I, in step 2, coats prefabricated ceramics
The thickness of layer is 0.8 ~ 1.0mm, and the layer is contracted to 0.1 ~ 0.2mm after calcining.Alumina ceramic layer I and alumina ceramic layer II
The density that thickness can be designed according to abrasive body is needed to be adjusted, and the thickness ratio after the two calcining is controlled 1：5 ~ 10 model
Enclose.The final use of each raw material in prefabricated ceramic layer, alumina ceramic layer I, alumina ceramic layer II is determined according to this thickness ratio
Amount.
Wherein, the raw material of prefabricated ceramic layer is made up of Ludox, aluminum oxide and aluminium dihydrogen phosphate, the weight ratio of each raw material
For Ludox：Aluminum oxide：Aluminium dihydrogen phosphate=15 ~ 20：50~70：10 ~ 35, wherein, aluminum oxide in raw material for alumina powder or
Alumina fibre.
Wherein, the raw material of alumina ceramic layer I is made up of Ludox, polyvinyl alcohol, iron powder and alumina powder, wherein,
The weight ratio of iron powder and alumina powder is, iron powder：Alumina powder=50 ~ 80：20~50；The weight of polyvinyl alcohol account for iron powder and
The percentage of alumina powder gross weight is 0.2 ~ 5%；The weight of Ludox accounts for the percentage of iron powder and alumina powder gross weight
It is 1 ~ 10%.The granularity of iron powder therein is 40 ~ 60 μm, and the granularity of alumina powder is 60 ~ 80 μm.
Wherein, the raw material of alumina ceramic layer II is made up of Ludox, additive, alumina powder and mineralizer, wherein, oxygen
Change aluminium powder based on 100%, the weight of Ludox is the 1 ~ 10% of alumina powder weight, and the weight of additive accounts for alumina powder weight
0.2 ~ 5%, the weight of mineralizer accounts for the 0.05 ~ 5% of alumina powder weight.
Described additive is polyvinyl alcohol or waterglass, and described mineralizer is yittrium oxide, magnesia or calcium oxide, oxygen
The granularity for changing aluminium powder is 2 ~ 60 μm.
The outer ceramic layer of the abrasive media can be alumina ceramic layer；The metal inner core of the abrasive media can be existing
Grinding machine is used in technology Cast-iron Ball or steel ball.The abrasive media, except spherical in shape, can also be cylinder（Section）It is existing Deng other
There is the shape of abrasive media present in technology.
At present, the domestic ball mills used have two classes：1. steel abrasive media, most metallurgical, mines use steel rolling
Material head is raw material, is swaged into the abrading-ball of various sizes, is heat-treated, and is also had without heat treatment, because various in raw material
The material head of composition has, from 30# steel to Cr12MoV steel etc..2. irony abrasive media：Small grinder has common spoken parts in traditional operas iron ball,
High ferrochrome ball, med-Mn ductile iron etc..Although the country has manufactured experimently bainite steel ball, low-alloy spoken parts in traditional operas iron ball, double high carbon phase iron balls and height
Chromium spoken parts in traditional operas iron ball etc., but the maximum still forged steel ball of consumption at present.
Embodiment 1
The preparation method of a kind of ball mill metal and Ceramic Composite abrasive media, comprises the following steps：
Step 1: existing steel abrasive media is taken as metal inner core, it is standby after its outer surface is polished；
Step 2: according to liquid Ludox：Alumina powder：Aluminium dihydrogen phosphate=20：70：10 weight than weighing each raw material successively,
The alumina powder and aluminium dihydrogen phosphate that the step is weighed are added in liquid Ludox, and pasty state slurry is made, is mixed evenly
Afterwards, pasty state slurry is coated in steel abrasive media outer peripheral face, prefabricated ceramic layer is formed in steel abrasive media outer peripheral face；
Step 3: according to iron powder：Alumina powder=65：35 weight ratio weighs raw material successively, then weighs weight respectively and account for iron powder
Polyvinyl alcohol, liquid Ludox with alumina powder gross weight 0.2%, 10%, the iron powder that the step is weighed, alumina powder
It is added to polyvinyl alcohol in liquid Ludox, mixing slurry I is made, the steel abrasive media after step 2 is handled is at 30 DEG C
Dry after 60min, mixing slurry I is wrapped outside this steel abrasive media；
Step 4: the raw material of alumina ceramic layer II is 2 ~ 60 μm of oxygen by liquid Ludox, polyvinyl alcohol, yittrium oxide and granularity
Change aluminium powder composition, wherein, alumina powder is based on 100%, and the weight of liquid Ludox is the 5% of alumina powder weight, polyvinyl alcohol
Weight account for the 3% of alumina powder weight, the weight of yittrium oxide accounts for the 2% of alumina powder weight；The polyethylene that the step is weighed
Alcohol, yittrium oxide and alumina powder are added in liquid Ludox, and mixing slurry II, then the steel grinding after step 3 processing is made
Mixing slurry II is wrapped outside medium, it is compressing using isostatic pressed, base substrate is made, it is standby；
Step 5: compressing base substrate is put into high temperature kiln, it is fired, is warming up to 5 DEG C/min heating rate
At 1350 DEG C, it is incubated at this temperature after 60min, natural cooling annealing obtains abrasive media.
Wherein, the mixing slurry I and mixing slurry II wrapped is correspondingly formed alumina ceramic layer I, aluminum oxide after firing, respectively
Ceramic layer II.The thickness of prefabricated ceramic layer after firing is limited in 0.1 ~ 0.2mm；Alumina ceramic layer I and oxidation after firing
The ratio of the radial thickness of aluminium ceramic layer II is 1：5.
Embodiment 2
The preparation method of a kind of ball mill metal and Ceramic Composite abrasive media, comprises the following steps：
Step 1: existing steel abrasive media is taken as metal inner core, it is standby after its outer surface is polished；
Step 2: according to liquid Ludox：Alumina powder：Aluminium dihydrogen phosphate=15：50：35 weight than weighing each raw material successively,
Alumina powder and aluminium dihydrogen phosphate are added in liquid Ludox, pasty state slurry is made, after being mixed evenly, pasty state is starched and applied
Steel abrasive media outer peripheral face is overlayed on, prefabricated ceramic layer is formed in steel abrasive media outer peripheral face；
Step 3: according to iron powder：Alumina powder=80：20 weight ratio weighs raw material successively, then weighs weight respectively and account for iron powder
Polyvinyl alcohol, liquid Ludox with alumina powder gross weight 5%, 1%, by the iron powder weighed, alumina powder and polyethylene
Alcohol is added in liquid Ludox, and mixing slurry I is made, and the steel abrasive media after step 2 is handled dries 5min at 85 DEG C
Afterwards, mixing slurry I is wrapped outside this steel abrasive media；
Step 4: the raw material of alumina ceramic layer II is 2 ~ 60 μm of oxidation by liquid Ludox, waterglass, calcium oxide and granularity
Aluminium powder is constituted, wherein, alumina powder is based on 100%, and the weight of liquid Ludox is the 1% of alumina powder weight, the weight of waterglass
Amount accounts for the 0.2% of alumina powder weight, and the weight of calcium oxide accounts for the 0.05% of alumina powder weight；The water glass that the step is weighed
Glass, calcium oxide and alumina powder are added in liquid Ludox, and mixing slurry II, then the steel grinding after step 3 processing is made
Mixing slurry II is wrapped outside medium, it is compressing using isostatic pressed, base substrate is made, it is standby；
Step 5: compressing base substrate is put into high temperature kiln, it is fired, is warming up to 5 DEG C/min heating rate
At 1450 DEG C, it is incubated at this temperature after 30min, natural cooling annealing obtains abrasive media.
Wherein, the mixing slurry I and mixing slurry II wrapped is correspondingly formed alumina ceramic layer I, aluminum oxide after firing, respectively
Ceramic layer II.The thickness of prefabricated ceramic layer after firing is limited in 0.1 ~ 0.2mm；Alumina ceramic layer I and oxidation after firing
The ratio of the radial thickness of aluminium ceramic layer II is 1：10.
Embodiment 3
The preparation method of a kind of ball mill metal and Ceramic Composite abrasive media, comprises the following steps：
Step 1: existing irony abrasive media is taken as metal inner core, it is standby after its outer surface is polished；
Step 2: according to liquid Ludox：Alumina powder：Aluminium dihydrogen phosphate=17：58：25 weight than weighing each raw material successively,
Alumina powder and aluminium dihydrogen phosphate are added in liquid Ludox, pasty state slurry is made, after being mixed evenly, steel is coated in
Abrasive media outer peripheral face, prefabricated ceramic layer is formed in steel abrasive media outer peripheral face；
Step 3: according to iron powder：Alumina powder=50：50 weight ratio weighs raw material successively, then weighs weight respectively and account for iron powder
Polyvinyl alcohol, liquid Ludox with alumina powder gross weight 2.5%, 5%, by the iron powder weighed, alumina powder and poly- second
Enol is added in liquid Ludox, and mixing slurry I is made, and the steel abrasive media after step 2 is handled dries at 55 DEG C
After 35min, mixing slurry I is wrapped outside this steel abrasive media；
Step 4: the raw material of alumina ceramic layer II is 2 ~ 60 μm of oxidation by liquid Ludox, waterglass, magnesia and granularity
Aluminium powder is constituted, wherein, alumina powder is based on 100%, and the weight of liquid Ludox is the 10% of alumina powder weight, the weight of waterglass
Amount accounts for the 5% of alumina powder weight, and the weight of magnesia accounts for the 5% of alumina powder weight；Waterglass that the step is weighed, oxidation
Magnesium and alumina powder are added in liquid Ludox, and mixing slurry II is made, then outside the steel abrasive media after step 3 is handled
Mixing slurry II is wrapped, it is compressing using isostatic pressed, base substrate is made, it is standby；
Step 5: compressing base substrate is put into high temperature kiln, it is fired, is warming up to 5 DEG C/min heating rate
At 1250 DEG C, it is incubated at this temperature after 90min, natural cooling annealing obtains abrasive media.
Wherein, the mixing slurry I and mixing slurry II wrapped is correspondingly formed alumina ceramic layer I, aluminum oxide after firing, respectively
Ceramic layer II.The thickness of prefabricated ceramic layer after firing is limited in 0.1 ~ 0.2mm；Alumina ceramic layer I and oxidation after firing
The ratio of the radial thickness of aluminium ceramic layer II is 1：8.
The present invention is illustrated by taking grinding spherical media as an example：As shown in figure 1, metal inner core 1 is spherical, made with Cast-iron Ball
For metal inner core, its density is 7.8g/cm3（Can also for steel ball as metal inner core, density replaces with 7.85 g/cm3）, half
Footpath is r；
What Fig. 1 was enumerated is grinding spherical media, and the abrasive media includes metal inner core 1 and is coated on the outer peripheral face of metal inner core 1
On outer ceramic layer.Wherein, outer ceramic layer is sequentially provided with pre- potting along the direction that the interior close to metal inner core 1 extends
Enamel coating 2, alumina ceramic layer I 3 and alumina ceramic layer II 4.
Multiple grinding medium is spherical, sets the radius of multiple grinding medium as R, if the density that multiple grinding medium needs
For ρ；The density of alumina ceramic layer I different, generally 4.0 ~ 5.0 g/cm according to iron powder, alumina powder ratio difference3；
Thickness after being fired due to prefabricated ceramic layer is 0.1 ~ 0.2mm, and prefabricated ceramic layer fire after the alumina layer that is formed and oxidation
Prefabricated ceramic layer less, therefore, when calculating metal inner core radius, is included aluminium oxide ceramics by the density difference of aluminium ceramic layer I
The scope of layer I is calculated.The density of alumina ceramic layer II is 3.63 g/cm3, wherein, the thickness of alumina ceramic layer I is oxygen
Change the 1/10-1/2 of the thickness of aluminium ceramic layer II.
Now set the g/cm of density 5.0 of alumina ceramic layer I3, thickness is the 1/10 of the thickness of alumina ceramic layer II, is pressed
The constant formulation of weight, calculates metal inner core radius：
；
Wherein, ρ and R is setting, such as requires density p=4.0g/cm of multiple grinding medium3, multiple grinding body radius R=2cm,
Above formula is substituted into, the cm of the radius r of metal inner core=0.885 can be obtained.
In use, with the progress of grinding, outer ceramic layer material is gradually thinning, the density of multiple grinding medium also becomes big
(core of abrasive body is constant), when reaching greater density（More than setting value）, it is necessary to changed.According to the mill of ceramic material
Consumption（Equivalent abrasion are less than 0.08%）, abrasive body wear extent is calculated by ball mill grinding output, setting grinding as needed in production
Body maximal density, reaches that this density will be changed.
The multiple grinding Medium Replacement is different from the replacing of homogenous material abrasive body, mainly with the mill of outer ceramic layer material
Damage, the density of multiple grinding medium becomes big, and example is set as with above-mentioned：Density p=4.0g/cm of multiple grinding medium3, it is compound to grind
The cm of mill body radius R=2cm, metal inner core radius r=0.885, the thickness of alumina ceramic layer II is 1.014cm, wherein, oxidation
The weight of aluminium ceramic layer II==106.99g, multiple grinding medium
Gross weight==133.97g。
The material（Outer layer ceramics）Equivalent is worn away（g/kg·h）≤ 0.05, convert into manufacture of cement 14g/t, by Φ 4.2 ×
13m circle stream ball millings are calculated, yield 250t/h, the Year's consumption 26880kg of abrasive body（Year production is counted for 320 days）, total abrasive body 155
T, consumption rate is 17.34%.With above-mentioned multiple grinding body（Radius 2cm）Exemplified by, during consumption 17.34%, abrasive body（Outer layer）Weight
Mitigate 18.557g, outer ceramic layer material thickness abrasion 0.1074cm, now, the density of multiple grinding medium is changed into 4.067 g/
cm3, density increases 0.067 g/cm3.I.e.：This abrasive body is used 1 year, and density increase is smaller.It must be set in actual production
Determine density maxima, abrasive body is changed on time according to the abrasion of abrasive body.Because the internal layer " filling " of abrasive body is that do not have
By grinding, it therefore, it can reuse.
The abrasive media of other structures form, can also be solved according to the principle of mass conservation, formulation.
The present invention improves the wearability of abrasive body, can effectively reduce existing cement in the case where not reducing grinding efficiency
The cost of clinker ball milling；Have the advantages that metal grinding body is higher than great, grinding efficiency.Metal prepared by the present invention（Steel, iron）
Ball milling grinding can be improved with Ceramic Composite abrasive media（Such as cement）Efficiency, reduce power consumption；Meanwhile, the wearability of abrasive body
It is higher.And the abrasive media can repeat to recycle, system ball milling（Cement）Cost substantially reduce.
Claims (10)
1. a kind of ball mill metal and Ceramic Composite abrasive media, it is characterised in that：The abrasive media include metal inner core with
And the outer ceramic layer on metal inner core outer peripheral face is coated on, the material of the metal inner core is steel or irony.
2. a kind of ball mill metal as claimed in claim 1 and Ceramic Composite abrasive media, it is characterised in that：Outer ceramic layer
The direction extended along the interior close to metal inner core is sequentially provided with prefabricated ceramic layer, alumina ceramic layer I and aluminum oxide
Ceramic layer II, the radial thickness of prefabricated ceramic layer is 0.1 ~ 0.2mm, alumina ceramic layer I and alumina ceramic layer II radial direction
The ratio of thickness is 1：5~10.
3. a kind of ball mill metal as claimed in claim 2 and Ceramic Composite abrasive media, it is characterised in that：Prefabricated ceramics
The raw material of layer is made up of Ludox, aluminum oxide and aluminium dihydrogen phosphate, and the weight ratio of each raw material is, Ludox：Aluminum oxide：Di(2-ethylhexyl)phosphate
Hydrogen aluminium=15 ~ 20：50~70：10 ~ 35, wherein, the aluminum oxide in raw material is alumina powder or alumina fibre.
4. a kind of ball mill metal as claimed in claim 2 and Ceramic Composite abrasive media, it is characterised in that：Aluminum oxide is made pottery
The raw material of enamel coating I is made up of Ludox, polyvinyl alcohol, iron powder and alumina powder, wherein, the weight of iron powder and alumina powder
Than for iron powder：Alumina powder=50 ~ 80：20~50；The weight of polyvinyl alcohol accounts for the percentage of iron powder and alumina powder gross weight
Than being 0.2 ~ 5%；It is 1 ~ 10% that the weight of Ludox, which accounts for iron powder and the percentage of alumina powder gross weight,.
5. a kind of ball mill metal as claimed in claim 2 and Ceramic Composite abrasive media, it is characterised in that：Aluminum oxide is made pottery
The raw material of enamel coating II is made up of Ludox, additive, alumina powder and mineralizer, wherein, alumina powder is based on 100%, Ludox
Weight be alumina powder weight 1 ~ 10%, the weight of additive accounts for the 0.2 ~ 5% of alumina powder weight, and the weight of mineralizer is accounted for
The 0.05 ~ 5% of alumina powder weight.
6. a kind of ball mill metal as claimed in claim 5 and Ceramic Composite abrasive media, it is characterised in that：Described is outer
Plus agent is polyvinyl alcohol or waterglass, described mineralizer is yittrium oxide, magnesia or calcium oxide, the granularity of alumina powder for 2 ~
60μm。
7. preparing the method for a kind of ball mill metal as claimed in claim 2 and Ceramic Composite abrasive media, its feature exists
In comprising the following steps：
Step 1: existing metal grinding media is taken as metal inner core, it is standby after its outer surface is polished；
Step 2: metal inner core outer peripheral face after step one is handled coats prefabricated ceramic layer, dry 5 at 30 ~ 85 DEG C ~
After 60min, oxygenerating aluminium ceramic layer I is wrapped up in the outer peripheral face of prefabricated ceramic layer；
Step 3: oxygenerating aluminium ceramic layer II is wrapped up in the outer peripheral face of alumina ceramic layer I again, system compressing using isostatic pressed
It is standby into base substrate；
Step 4: compressing base substrate is put into high temperature kiln, it is fired, is warming up to 5 DEG C/min heating rate
At 1250 ~ 1450 DEG C, it is incubated at this temperature after 30 ~ 90min, natural cooling annealing obtains abrasive media.
8. preparing a kind of method of ball mill metal and Ceramic Composite abrasive media as claimed in claim 7, its feature exists
In the preparation method of prefabricated ceramic layer is：The raw material of prefabricated ceramic layer is by liquid Ludox, aluminum oxide and aluminium dihydrogen phosphate group
Into according to liquid Ludox：Aluminum oxide：Aluminium dihydrogen phosphate=15 ~ 20：50~70：10 ~ 35 weight than weighing each raw material successively,
Aluminum oxide and aluminium dihydrogen phosphate are added in liquid Ludox, pasty state slurry is made, after being mixed evenly, is coated in metal
Core outer peripheral face, is made prefabricated ceramic layer；Wherein, the aluminum oxide in raw material is alumina powder or alumina fibre.
9. preparing a kind of method of ball mill metal and Ceramic Composite abrasive media as claimed in claim 7, its feature exists
In：The raw material of alumina ceramic layer I is 20 ~ 80 μ by liquid Ludox, polyvinyl alcohol, the iron powder that granularity is 20 ~ 60 μm and granularity
M alumina powder composition, wherein, the weight ratio of iron powder and alumina powder is, iron powder：Alumina powder=50 ~ 80：20~
50；It is 0.2 ~ 5% that the weight of polyvinyl alcohol, which accounts for iron powder and the percentage of alumina powder gross weight,；The weight of liquid Ludox is accounted for
Iron powder and the percentage of alumina powder gross weight are 1 ~ 10%.
10. preparing a kind of method of ball mill metal and Ceramic Composite abrasive media as claimed in claim 7, its feature exists
In：The raw material of alumina ceramic layer II is 2 ~ 60 μm of alumina powder group by liquid Ludox, additive, mineralizer and granularity
Into, wherein, alumina powder is based on 100%, and the weight of liquid Ludox is the 1 ~ 10% of alumina powder weight, and the weight of additive is accounted for
The 0.2 ~ 5% of alumina powder weight, the weight of mineralizer accounts for the 0.05 ~ 5% of alumina powder weight；Described additive is polyethylene
Alcohol or waterglass, described mineralizer are yittrium oxide, magnesia or calcium oxide.
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