CN107312499B - 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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- 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
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- 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
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- 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 that is coated on metal inner core outer peripheral surface.In the present invention, outer ceramic layer is successively arranged 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 is by metal together with Ceramic bond, but it is mutually indepedent, abrasive media uses " rice dumpling " formula structure, outer layer (skin) is existing ceramic grinding body material, intermediate (filling) is metal material, and since the density of abrasive body ceramic layer is small, and the density of cast iron materials is big, the two can design the thickness of different " skins " and the size of " filling " after combining, reach change grinding volume density size purpose.
Description
Technical field
The present invention relates to powder processing engineering technology fields, and in particular to a kind of ball mill metal and Ceramic Composite are ground
Medium and preparation method thereof.
Background technique
Since the product particle pattern of ball mill grinding is close to spherical shape, meet the technical requirements of powder product, so ball milling
Machine is that powder processes most common equipment.With the development of science and technology, to Powder Processing Technology in China, higher requirements are also raised,
The especially performance indicator of abrasive body, it is desirable that the powder granule pattern of grinding is suitable, and the smaller gradation of partial size is reasonable；And the energy of grinding
It consumes lower.
Currently, abrasive body majority used in China's ball mill is metal (steel, iron) abrasive body (especially in cement industry), i.e., it is logical
It is often used steel ball, steel section, since ball mill useful work is low, only 3% is used for grinding material, that accordingly, there exist ball mill power consumptions is high,
Temperature and the problems such as mill product temperature is high out, be not achieved technical requirements so as to cause production cost high quality in grinding.
It is close due to ceramic grinding body currently, existing high-performance ceramic abrasive body (toughening, wear-resisting etc.) is used in ball mill
(density of ceramic grinding body is 3.657.8g/cm to degree3) compared with metallic iron density (density of iron be 7.8g/cm3) much smaller,
Under the conditions of identical or filling rate that ceramic grinding body is slightly higher, the Weight Loaded of ceramic grinding body is only the 50 ~ 60% of metal, therefore,
The power consumption (running current decline 30% or so) of ball mill reduces 5kw.h/t or so, and energy-saving for enterprise provides technology guarantor
Card.
But in practice from current production, discovery ceramic grinding body has the following problems: since ceramic grinding volume density is inclined
Small, the grainding capacity of abrasive body is low compared with metal grinding body, and the production capacity of grinding machine reduces；When performance (the material grindability of material
It is deteriorated, granularity becomes larger) when changing, the stability of the yield and quality of grinding machine is poor, and amplitude of variation is larger.Ceramic grinding body
Abrasive action is only played at present, it is desirable that 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 material size changes, larger fluctuation all occurs for the yield and product quality of grinding machine；In addition, ceramic grinding body
High production cost, 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 indicator-density of current ceramic grinding body.
Summary of the invention
For the present invention in order to overcome the deficiencies in the prior art, an object of the present invention is to provide a kind of ball mill use
Metal and Ceramic Composite abrasive media, the multiple grinding medium have the high-wearing feature and metal grinding body specific gravity 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 in order to overcome the deficiencies of the prior art used by technical solution are as follows: a kind of ball mill is situated between with multiple grinding
Matter, the abrasive media include metal inner core and the outer ceramic layer that is coated on metal inner core outer peripheral surface, the material of the metal inner core
Matter is steel or irony.
Outer ceramic layer is successively arranged prefabricated ceramic layer, aluminium 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 are 0.1 ~ 0.2mm, alumina ceramic layer I and aluminium 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 of silica solution, aluminium oxide and aluminium dihydrogen phosphate, the weight of each raw material
Than for silica solution: aluminium oxide: aluminium dihydrogen phosphate=15 ~ 20:50 ~ 70:10 ~ 35, wherein the aluminium oxide in raw material is alumina powder
Or alumina fibre.
In the present invention, the raw material of alumina ceramic layer I is made of silica solution, polyvinyl alcohol, iron powder and alumina powder,
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 total weight are 0.2 ~ 5%；The weight of silica solution accounts for the hundred of iron powder and alumina powder total weight
Dividing ratio is 1 ~ 10%.
In the present invention, the raw material of alumina ceramic layer II is made of silica solution, additive, alumina powder and mineralizer,
In, alumina powder is based on 100%, and the weight of silica solution 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 account for the 0.05 ~ 5% of alumina powder weight.
Further, the additive be polyvinyl alcohol or waterglass, the mineralizer be yttrium oxide, magnesia or
Calcium oxide, the granularity of alumina powder are 2 ~ 60 μm.
A kind of preparation method of ball mill metal and Ceramic Composite abrasive media, comprising the following steps:
Step 1: take existing metal grinding media as metal inner core, it is spare after the polishing of its outer surface；
Step 2: step 1 treated metal inner core outer peripheral surface is coated prefabricated ceramic layer, dry 5 at 30 ~ 85 DEG C ~
After 60min, oxygenerating aluminium ceramic layer I is wrapped up in the outer peripheral surface of prefabricated ceramic layer；
Step 3: wrap up in oxygenerating aluminium ceramic layer II in the outer peripheral surface of alumina ceramic layer I again, using etc. static pressure suppressions at
Green body is made in type, spare；
Step 4: the green body of compression moulding is put into high temperature kiln, it is fired, is heated up with the heating rate of 5 DEG C/min
When to 1250 ~ 1450 DEG C, after keeping the temperature 30 ~ 90min at this temperature, natural cooling annealing obtains abrasive media.
Further, prefabricated ceramic layer the preparation method comprises the following steps: the raw material of prefabricated ceramic layer by liquid silica solution, aluminium oxide and
Aluminium dihydrogen phosphate composition, according to liquid silica solution: aluminium oxide: aluminium dihydrogen phosphate=15 ~ 20:50 ~ 70:10 ~ 35 weight ratio is successively
Each raw material is weighed, aluminium oxide and aluminium dihydrogen phosphate are added in liquid silica solution, paste slurry is made, after being mixed evenly,
Coated in metal inner core outer peripheral surface, prefabricated ceramic layer is made；Wherein, the aluminium oxide in raw material is that alumina powder or aluminium oxide are fine
Dimension.
Further, the raw material of alumina ceramic layer I is by liquid silica solution, polyvinyl alcohol, iron powder and alumina powder group
At, wherein the weight ratio of iron powder and alumina powder is the iron powder that granularity is 20 ~ 60 μm: the aluminium oxide that granularity is 20 ~ 80 μm
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 total weight,；Liquid
It is 1 ~ 10% that the weight of silica solution, which accounts for iron powder and the percentage of alumina powder total weight,.
Further, the raw material of alumina ceramic layer II is 2 ~ 60 by liquid silica solution, polyvinyl alcohol, yttrium oxide and granularity
μm alumina powder composition, wherein for alumina powder based on 100%, the weight of liquid silica solution 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 the mineralizer is yttrium oxide, magnesia or calcium oxide.
The ceramic dielectric of the application in actual use, can need density to be achieved according to abrasive body, determine metal material
Expect the size of (filling), the thickness ratio of alumina ceramic layer I and alumina ceramic layer II.First applied in metal material (filling) outer layer
Prefabricated ceramic layer, alumina ceramic layer I and alumina ceramic layer II are covered, ceramic material is processed by current practice finally, is formed,
Calcining.
Contain silica solution in prefabricated ceramic layer of the invention, alumina ceramic layer I and alumina ceramic layer II, is firing
When, the gelation of silica solution is formed on alumina powder surface to be coated, and is reacted with aluminium oxide, is generated mullite, is promoted
The densification of aluminium oxide ceramics.And silica solution and polyvinyl alcohol are compound, form cross-linked network, are adsorbed on the wall surface of hole, mention
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 structure gap, when can fire in green body and is cooling, buffer the contraction of outer ceramic layer.
The utility model has the advantages that the present invention by metal together with Ceramic bond, but mutually indepedent, abrasive media uses " rice dumpling "
Formula structure, outer layer (skin) are existing ceramic grinding body material, and intermediate (filling) is metal material, close due to abrasive body ceramic layer
Spend small, and the density of cast iron materials is big, and the two can design the thickness of different " skins " and the size of " filling " after combining, and 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 due in sintering process, because expand it is inconsistent caused by stress, be burnt at 1250 ~ 1450 DEG C, iron powder meeting and aluminium oxide
The phenomenon that there is liquid-phase sintering, increasing the adaptability of metal inner core and outer ceramic layer, be not in internal layer gap.
The present invention is larger using density, the lower metal of price (steel, iron) ball is as kernel, and coating outside kernel can make
For the ceramic material of abrasive media, manufactured multiple grinding medium is made to have the wearability of aluminium oxide ceramics abrasive body concurrently and similar to gold
Belong to grinding volume density, overcomes the problems such as existing aluminium oxide ceramic ball density is small, to grinding material bad adaptability.In same volume
Abrasive media (filling rate is identical) under the premise of, due to multiple grinding medium of the invention density increase, to improve mill
The mill efficiency of machine.
Detailed description of the invention
Fig. 1 is spherical multiple grinding medium of the invention.
Appended drawing reference: 1, metal inner core, 2, prefabricated ceramic layer, 3, alumina ceramic layer I, 4, alumina ceramic layer II.
Specific embodiment
The present invention is further explained in the light of specific embodiments, so that those skilled in the art can be better
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 surface.Wherein, the material of the metal inner core is steel or irony；Outer ceramic layer is along close to metal
The direction that the interior of kernel extends is successively arranged 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 in step 2, to coat prefabricated ceramics in order to enable alumina ceramic layer I is easily adhered
Layer with a thickness of 0.8 ~ 1.0mm, the layer is contracted to 0.1 ~ 0.2mm after calcining.Alumina ceramic layer I and alumina ceramic layer II
The density needs that thickness can be designed according to abrasive body are adjusted, model of the calcined thickness of the two than control in 1:5 ~ 10
It encloses.According to this thickness ratio determine prefabricated ceramic layer, alumina ceramic layer I, in alumina ceramic layer II each raw material final use
Amount.
Wherein, the raw material of prefabricated ceramic layer is made of silica solution, aluminium oxide and aluminium dihydrogen phosphate, the weight ratio of each raw material
For silica solution: aluminium oxide: aluminium dihydrogen phosphate=15 ~ 20:50 ~ 70:10 ~ 35, wherein the aluminium oxide in raw material be alumina powder or
Alumina fibre.
Wherein, the raw material of alumina ceramic layer I is made of silica solution, 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 total weight is 0.2 ~ 5%；The weight of silica solution accounts for the percentage of iron powder and alumina powder total 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 of silica solution, additive, alumina powder and mineralizer, wherein oxygen
Change aluminium powder based on 100%, the weight of silica solution 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.
The additive is polyvinyl alcohol or waterglass, and the mineralizer is yttrium 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
The Cast-iron Ball or steel ball that grinding machine uses in technology.The abrasive media other can also show in addition to spherical in shape for cylindrical (section) etc.
There is the shape of abrasive media present in technology.
Currently, the domestic ball mills used have two classes: 1. steel abrasive media, most metallurgy, mine 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 consumption is maximum or forged steel ball at present.
Embodiment 1
A kind of preparation method of ball mill metal and Ceramic Composite abrasive media, comprising the following steps:
Step 1: take existing steel abrasive media as metal inner core, it is spare after the polishing of its outer surface；
Step 2: according to liquid silica solution: alumina powder: aluminium dihydrogen phosphate=20:70:10 weight ratio successively weighs respectively
The weighed alumina powder of the step and aluminium dihydrogen phosphate are added in liquid silica solution by raw material, and paste slurry is made, is mixed
After uniformly, paste slurry is coated in steel abrasive media outer peripheral surface, forms prefabricated ceramic layer in steel abrasive media outer peripheral surface；
Step 3: according to iron powder: alumina powder=65:35 weight ratio successively weighs raw material, then weighs weight respectively and account for
Iron powder and the polyvinyl alcohol of alumina powder total weight 0.2%, 10%, liquid silica solution, by the weighed iron powder of the step, aluminium oxide
Powder and polyvinyl alcohol are added in liquid silica solution, and mixing slurry I is made, by step 2 treated steel abrasive media 30
After drying 60min at DEG C, mixing slurry I is wrapped outside this steel abrasive media；
Step 4: the raw material of alumina ceramic layer II is 2 ~ 60 μm by liquid silica solution, polyvinyl alcohol, yttrium oxide and granularity
Alumina powder composition, wherein for alumina powder based on 100%, the weight of liquid silica solution is the 5% of alumina powder weight, poly- second
The weight of enol accounts for the 3% of alumina powder weight, and the weight of yttrium oxide accounts for the 2% of alumina powder weight；The step is weighed poly-
Vinyl alcohol, yttrium oxide and alumina powder are added in liquid silica solution, mixing slurry II are made, then in step 3 treated steel
Mixing slurry II is wrapped outside abrasive media, using etc. static pressure suppressions form, green body is made, it is spare；
Step 5: the green body of compression moulding is put into high temperature kiln, it is fired, is heated up with the heating rate of 5 DEG C/min
When to 1350 DEG C, after keeping the temperature 60min at this temperature, natural cooling annealing obtains abrasive media.
Wherein, the mixing slurry I and mixing slurry II wrapped after firing, respectively corresponds to form alumina ceramic layer I, aluminium oxide
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
A kind of preparation method of ball mill metal and Ceramic Composite abrasive media, comprising the following steps:
Step 1: take existing steel abrasive media as metal inner core, it is spare after the polishing of its outer surface；
Step 2: according to liquid silica solution: alumina powder: aluminium dihydrogen phosphate=15:50:35 weight ratio successively weighs respectively
Alumina powder and aluminium dihydrogen phosphate are added in liquid silica solution by raw material, and paste slurry is made, after being mixed evenly, will paste
Shape slurry is coated in steel abrasive media outer peripheral surface, forms prefabricated ceramic layer in steel abrasive media outer peripheral surface；
Step 3: according to iron powder: alumina powder=80:20 weight ratio successively weighs raw material, then weighs weight respectively and account for
Iron powder and the polyvinyl alcohol of alumina powder total weight 5%, 1%, liquid silica solution by weighed iron powder, alumina powder and gather
Vinyl alcohol is added in liquid silica solution, and mixing slurry I is made, and by step 2, treated that steel abrasive media dries at 85 DEG C
After 5min, mixing slurry I is wrapped outside this steel abrasive media；
Step 4: the raw material of alumina ceramic layer II is 2 ~ 60 μm by liquid silica solution, waterglass, calcium oxide and granularity
Alumina powder composition, wherein alumina powder is based on 100%, and the weight of liquid silica solution is the 1% of alumina powder weight, waterglass
Weight account for the 0.2% of alumina powder weight, the weight of calcium oxide accounts for the 0.05% of alumina powder weight；By the weighed water of the step
Glass, calcium oxide and alumina powder are added in liquid silica solution, mixing slurry II are made, then treated that steel is ground in step 3
Mixing slurry II is wrapped outside grinding media, using etc. static pressure suppressions form, green body is made, it is spare；
Step 5: the green body of compression moulding is put into high temperature kiln, it is fired, is heated up with the heating rate of 5 DEG C/min
When to 1450 DEG C, after keeping the temperature 30min at this temperature, natural cooling annealing obtains abrasive media.
Wherein, the mixing slurry I and mixing slurry II wrapped after firing, respectively corresponds to form alumina ceramic layer I, aluminium oxide
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
A kind of preparation method of ball mill metal and Ceramic Composite abrasive media, comprising the following steps:
Step 1: take existing irony abrasive media as metal inner core, it is spare after the polishing of its outer surface；
Step 2: according to liquid silica solution: alumina powder: aluminium dihydrogen phosphate=17:58:25 weight ratio successively weighs respectively
Alumina powder and aluminium dihydrogen phosphate are added in liquid silica solution by raw material, and paste slurry, after being mixed evenly, coating is made
In steel abrasive media outer peripheral surface, prefabricated ceramic layer is formed in steel abrasive media outer peripheral surface；
Step 3: according to iron powder: alumina powder=50:50 weight ratio successively weighs raw material, then weighs weight respectively and account for
Iron powder and the polyvinyl alcohol of alumina powder total weight 2.5%, 5%, liquid silica solution, by weighed iron powder, alumina powder and
Polyvinyl alcohol is added in liquid silica solution, and mixing slurry I is made, and by step 2, treated that steel abrasive media dries in the air at 55 DEG C
After dry 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 by liquid silica solution, waterglass, magnesia and granularity
Alumina powder composition, wherein alumina powder is based on 100%, and the weight of liquid silica solution is the 10% of alumina powder weight, waterglass
Weight account for the 5% of alumina powder weight, the weight of magnesia accounts for the 5% of alumina powder weight；By the weighed waterglass of the step,
Magnesia and alumina powder are added in liquid silica solution, mixing slurry II are made, then in step 3 treated steel grinding medium
Mixing slurry II is wrapped outside matter, using etc. static pressure suppressions form, green body is made, it is spare；
Step 5: the green body of compression moulding is put into high temperature kiln, it is fired, is heated up with the heating rate of 5 DEG C/min
When to 1250 DEG C, after keeping the temperature 90min at this temperature, natural cooling annealing obtains abrasive media.
Wherein, the mixing slurry I and mixing slurry II wrapped after firing, respectively corresponds to form alumina ceramic layer I, aluminium oxide
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 shape, being made with Cast-iron Ball
For metal inner core, density 7.8g/cm3(or steel ball, as metal inner core, density replaces with 7.85 g/cm3), half
Diameter is r；
What Fig. 1 was enumerated is grinding spherical media, which includes metal inner core 1 and be coated on outside metal inner core 1
Outer ceramic layer on circumferential surface.Wherein, outer ceramic layer is successively arranged pre- along the direction that the interior close to metal inner core 1 extends
Potting enamel coating 2, alumina ceramic layer I 3 and alumina ceramic layer II 4.
Multiple grinding medium is spherical shape, 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；
After being fired due to prefabricated ceramic layer with a thickness of 0.1 ~ 0.2mm, and prefabricated ceramic layer fire after the alumina layer that is formed and oxidation
The density difference of aluminium ceramic layer I is little, therefore, when calculating metal inner core radius, prefabricated ceramic layer is included in aluminium oxide ceramics
The range of layer I is calculated.The density of alumina ceramic layer II is 3.63 g/cm3, wherein alumina ceramic layer I is with a thickness of oxygen
Change the 1/10-1/2 of II thickness of aluminium ceramic layer.
Now set the density 5.0g/cm of alumina ceramic layer I3, with a thickness of aluminium oxide ceramics
The 1/10 of II thickness of layer, formulation constant by weight calculate metal inner core radius:；Wherein, ρ and R is
Setting, such as require density p=4.0g/cm of multiple grinding medium3, multiple grinding body radius R=2cm, substitute into above formula, can find out
The cm of radius r=0.885 of metal inner core.
In use, outer ceramic layer material is gradually thinning with the progress of grinding, the density of multiple grinding medium is also become larger
(core of abrasive body is constant), when reaching greater density (being more than setting value), it is necessary to be replaced.According to the mill of ceramic material
Consumption (equivalent is worn away less than 0.08%) calculates abrasive body abrasion loss by ball mill grinding output, grinding is set as needed in production
Body maximal density, reaching this density will be replaced.
The multiple grinding Medium Replacement is different from the replacement of homogenous material abrasive body, mainly with the mill of outer ceramic layer material
Damage, the density of multiple grinding medium become larger, and are set as example with above-mentioned: density p=4.0g/cm of multiple grinding medium3, compound to grind
Mill body radius R=2cm, the metal inner core radius cm of r=0.885, alumina ceramic layer II with a thickness of 1.014cm, wherein oxidation
The weight of aluminium ceramic layer II==106.99g, the gross weight of multiple grinding medium
==133.97g。
The material (outer layer ceramics) equivalent abrasion (g/kgh)≤0.05, convert into manufacture of cement 14g/t, by Φ 4.2 ×
13m circle stream ball milling calculates, and yield 250t/h, the annual consumption 26880kg(of abrasive body is produced 320 days and counted), total abrasive body 155
T, consumption rate 17.34%.By taking above-mentioned multiple grinding body (radius 2cm) as an example, when consuming 17.34%, abrasive body (outer layer) weight
Mitigate 18.557g, outer ceramic layer material thickness wears 0.1074cm, at this point, the density of multiple grinding medium becomes 4.067 g/
cm3, density increases 0.067 g/cm3.That is: this abrasive body uses 1 year, and density increase is smaller.It must set in actual production
Determine density maxima, abrasive body is replaced on time according to the abrasion of abrasive body.Since the internal layer " filling " of abrasive body is that do not have
By grinding, therefore, may be reused.
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 in the case where not reducing grinding efficiency, and existing cement can be effectively reduced
The cost of clinker ball milling；Has the advantages that metal grinding body than great, grinding efficiency is high.Metal (steel, iron) prepared by the present invention
The efficiency of ball milling grinding (such as cement) can be improved with Ceramic Composite abrasive media, reduce power consumption；Meanwhile the wearability of abrasive body
It is higher.And the abrasive media can repeat to recycle, and the cost of system ball milling (cement) substantially reduces.
Claims (5)
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 it is coated on the outer ceramic layer on metal inner core outer peripheral surface, the material of the metal inner core is steel or irony；Outer ceramic layer edge is leaned on
The direction that the interior of nearly metal inner core extends is successively arranged prefabricated ceramic layer, alumina ceramic layer I and aluminium oxide ceramics
Layer II, the radial thickness of prefabricated ceramic layer are 0.1 ~ 0.2mm, the radial thickness of alumina ceramic layer I and alumina ceramic layer II
Ratio be 1:5 ~ 10；The raw material of prefabricated ceramic layer is made of silica solution, aluminium oxide and aluminium dihydrogen phosphate, the weight ratio of each raw material
For silica solution: aluminium oxide: aluminium dihydrogen phosphate=15 ~ 20:50 ~ 70:10 ~ 35, wherein the aluminium oxide in raw material be alumina powder or
Alumina fibre；The raw material of alumina ceramic layer I is made of silica solution, polyvinyl alcohol, iron powder and alumina powder, wherein iron
The weight ratio of powder and alumina powder is iron powder: alumina powder=50 ~ 80:20 ~ 50；The weight of polyvinyl alcohol accounts for iron powder and oxygen
The percentage for changing aluminium powder body total weight is 0.2 ~ 5%；The weight of silica solution accounts for iron powder and the percentage of alumina powder total weight is
1~10%；The raw material of alumina ceramic layer II is made of silica solution, additive, alumina powder and mineralizer, wherein alumina powder
Based on 100%, the weight of silica solution is the 1 ~ 10% of alumina powder weight, the weight of additive account for alumina powder weight 0.2 ~
5%, the weight of mineralizer accounts for the 0.05 ~ 5% of alumina powder weight；The additive be polyvinyl alcohol or waterglass, it is described
Mineralizer is yttrium oxide, magnesia or calcium oxide, and the granularity of alumina powder is 2 ~ 60 μm.
2. preparing a kind of method of ball mill metal and Ceramic Composite abrasive media as described in claim 1, feature exists
In, comprising the following steps:
Step 1: take existing metal grinding media as metal inner core, it is spare after the polishing of its outer surface；
Step 2: step 1 treated metal inner core outer peripheral surface is coated prefabricated ceramic layer, dry 5 at 30 ~ 85 DEG C ~
After 60min, oxygenerating aluminium ceramic layer I is wrapped up in the outer peripheral surface of prefabricated ceramic layer；
Step 3: wrap up in oxygenerating aluminium ceramic layer II in the outer peripheral surface of alumina ceramic layer I again, using etc. static pressure suppressions form, system
It is spare at green body；
Step 4: the green body of compression moulding is put into high temperature kiln, it is fired, is warming up to the heating rate of 5 DEG C/min
At 1250 ~ 1450 DEG C, after keeping the temperature 30 ~ 90min at this temperature, natural cooling annealing obtains abrasive media.
3. the method for preparing a kind of ball mill metal and Ceramic Composite abrasive media as claimed in claim 2, feature exist
In, prefabricated ceramic layer the preparation method comprises the following steps: the raw material of prefabricated ceramic layer by liquid silica solution, aluminium oxide and aluminium dihydrogen phosphate group
At according to liquid silica solution: aluminium oxide: aluminium dihydrogen phosphate=15 ~ 20:50 ~ 70:10 ~ 35 weight ratio successively weighs each raw material,
Aluminium oxide and aluminium dihydrogen phosphate are added in liquid silica solution, paste slurry is made, after being mixed evenly, is coated in metal
Prefabricated ceramic layer is made in core outer peripheral surface；Wherein, the aluminium oxide in raw material is alumina powder or alumina fibre.
4. the method for preparing a kind of ball mill metal and Ceramic Composite abrasive media as claimed in claim 2, feature exist
In: the raw material of alumina ceramic layer I is 20 ~ 80 μ by liquid silica solution, polyvinyl alcohol, the iron powder that granularity is 20 ~ 60 μm and granularity
The alumina powder of m forms, 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 total weight,；The weight of liquid silica solution accounts for
Iron powder and the percentage of alumina powder total weight are 1 ~ 10%.
5. the method for preparing a kind of ball mill metal and Ceramic Composite abrasive media as claimed in claim 2, feature exist
In: the alumina powder group that the raw material of alumina ceramic layer II is 2 ~ 60 μm by liquid silica solution, additive, mineralizer and granularity
At, wherein alumina powder is based on 100%, and the weight of liquid silica solution is the 1 ~ 10% of alumina powder weight, and the weight of additive accounts for
The 0.2 ~ 5% of alumina powder weight, the weight of mineralizer account for the 0.05 ~ 5% of alumina powder weight；The additive is polyethylene
Alcohol or waterglass, the mineralizer are yttrium oxide, magnesia or calcium oxide.
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| CN109265174B (en) * | 2018-09-21 | 2021-03-30 | 河南晟道科技有限公司 | Ceramic grinding ball with steel core for ball mill |
| CN109574638A (en) * | 2018-12-29 | 2019-04-05 | 山东天汇研磨耐磨技术开发有限公司 | A kind of high-bond ceramics section and its manufacturing method applying metal-rubber |
| CN109592985A (en) * | 2018-12-29 | 2019-04-09 | 山东天汇研磨耐磨技术开发有限公司 | Tough antivibration wear resistant damage ceramic grinding ball and its manufacturing method in one kind |
| CN112524276A (en) * | 2020-11-13 | 2021-03-19 | 娄底市安地亚斯电子陶瓷有限公司 | Aluminum oxide ceramic water gap valve for protecting molten steel gap of smelting furnace and installation method |
| CN113385675B (en) * | 2021-05-31 | 2023-09-01 | 自贡硬质合金有限责任公司 | Preparation method of hard alloy or metal ceramic |
| CN115283679B (en) * | 2022-08-04 | 2023-08-01 | 东营嘉洲工业科技有限公司 | Preparation method of density-adjustable high-strength high-toughness zirconia grinding ball |
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