CN105819840A - Ceramic grinding segment for cement grinder and preparation method of ceramic grinding segment - Google Patents
Ceramic grinding segment for cement grinder and preparation method of ceramic grinding segment Download PDFInfo
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- CN105819840A CN105819840A CN201610199246.5A CN201610199246A CN105819840A CN 105819840 A CN105819840 A CN 105819840A CN 201610199246 A CN201610199246 A CN 201610199246A CN 105819840 A CN105819840 A CN 105819840A
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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
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Abstract
The invention discloses a ceramic grinding segment for a cement grinder and a preparation method of the ceramic grinding segment. The ceramic grinding segment is prepared from the following components in percentage by weight: 92 to 95% of alumina, 0.5 to 2% of tungsten carbide, 0.8 to 3% of calcium carbonate, 1 to 1.2% of magnesium carbonate, 0.5 to 2% of titanium nitride, 1 to 3% of silicon dioxide, and 0.8 to 1% of zirconia, wherein the ceramic grinding segment for the cement grinder is in a shape of a cylinder, a spherical column combination, a spindle or a frustum of a square pyramid which is symmetrical up and down. The preparation method of the ceramic grinding segment is characterized by carrying out press forming and then high temperature sintering, and comprises the processes of material preparation, ball milling, spray granulation, silo aging, profiling, high temperature sintering, powder removing and polishing, drying of a finished product and the like. The density of the finished product is only half of a steel material, so as to be capable of effectively saving electricity and energy and reduce carbon emission. The finished product further has high hardness, good abrasion resistance, low material consumption, good economy, high temperature resistance, capability of working at high strength for a long time, good toughness, difficult breaking and collapse while being impacted, excellent practicality, good binding force and easier forming.
Description
Technical field
The present invention relates to cement manufacture field, particularly relate to a kind of cement mill ceramic grinding section and preparation side thereof
Method.
Background technology
The primary raw material manufacturing cement is limestone, clay and Iron Ore Powder, in order to control setting time, and also will be in grog
Add the Gypsum Fibrosum of less than 4%.In cement production process, major part raw material to crush, raw material prehomogenization to be carried out.Water
In mud raw material preparation process, often produce 1 ton of portland cement at least want 3 tons of materials of grinding (include various raw material, fuel, grog,
Compound, Gypsum Fibrosum), according to statistics, dry cement production line grinding operation need the power consumed account for the 60% of full factory power with
On, wherein raw grinding accounts for more than 30%, and cement grinding accounts for 40%.
Cement mill have to material strong adaptability, can produce continuously, broken than big, be prone to the thin of speed governing ground prod
The features such as degree.The operation principle of conventional cement mill is that material is entered through pan feeding quill shaft spiral equably by feed arrangement
Entering in grinding machine storehouse, have ladder lining board or corrugated liner, built-in different size steel ball or steel section in this storehouse, barrel body rotation produces centrifugal
Power falls after taking steel ball or steel section to certain altitude, and material is produced impact and abrasive action, and the consumption of energy is the most former
Material and the lifting of ground section, wherein the quality size of ground section is the biggest for the impact of energy consumption.
Cement mill ground section is ball mill equipment grinding material medium, by ball mill grinding section, material, liner plate it
Between collision friction produce ablation, thus the particle diameter of material is reduced further.Therefore, ground section hardness in use
It is one of principal element affecting ball milling shaping effect with wearability, ground section and liner plate, ground section and grind in process of lapping
The friction occurred between mill section is inevitable, therefore, also requires that ground section has high hardness.In prior art, cement
The material of machine ground section mostly is tool steel or high carbon stainless steel, and material each other and weares and teares relatively big between material, surface is easy
Degrading, the proportion of goods damageds are big, change fast；Meanwhile, the mill section quality of steel is big, and during work, power consumption is high, and the carbon emission brought is big, the most not
Pollution of chromium in rust steel matter is the most disadvantageous for cement, affects energy efficiency and environmental protection；Additionally some is adopted
With hard alloy or ceramic material, such material can adapt to the applying working condition of cement mill very well, but its cost is high, fragile
During broken, molding, size is wayward, molding rear surface is irregular unanimously.
In sum, how to improve the hardness of cement mill ground section, wearability is the emphasis studied, cement grinding skill
Art is also to efficient, economize on electricity direction fast development.
In the Patents the most applied for, patent " preparation technology of a kind of ball mill high hardness wear-resisting abrasive body "
(application number: 201410374668.2, publication date: 2014-10-15), discloses the preparation of a kind of high hardness high toughness wear body
Method, adds the auxiliary materials of function such as molybdenum-iron in conventional steel mill section and promotes the properties of mill section, but steel mill section itself is weak to
Erosion, owing to multiple alloy adds without element, the corrosion resistance of mill section also can decline；It addition, remain martensite type steel grade, it is weak to height
Temperature.Patent " a kind of method of low-temperature sintering microcrystalline alumina toughening ceramic mill ball " (application number: 201310109543.2, public
Open day: 2013-06-26), disclose one and have employed ceramic as raw-material abrasive body equally, this patent have employed in a large number
Kaolin and carbonate, as sintering aid, have employed more silicon powder as toughener, and itself high-strength ceramic composition is only
About 40%, the abrasive body hardness after its molding is relatively low, and heat-resisting ability is relatively poor, and its invention advantage is tended to reduce burning
Junction temperature improving production efficiency, and sacrifice a part and grind performance, meanwhile, this abrasive body is only applicable to spherical, if being processed as
Pottery section is then difficult to bear stronger shock and grinding；Further, since the addition of a large amount of toughness reinforcing cooling auxiliary agents, insufficient strength, should
The optional forming diameter of ceramic grinding ball can only be less than 10mm, it is impossible to adapts to the demand of large-size ball mill operating mode.
Summary of the invention
For drawbacks described above present in prior art, it is desirable to provide a kind of, energy consumption is low, material consumption is low, reduce carbon row
Put, high rigidity, high temperature resistant, high life, easy-formation, good toughness, the cement mill pottery of cement high purity of production grind
Mill section.
To achieve these goals, the present invention by the following technical solutions: a kind of cement mill ceramic grinding section, its
Contain aluminium oxide 92-95%, tungsten carbide 0.5-2%, calcium carbonate 0.8-3%, magnesium carbonate 1-1.2%, titanium nitride by weight percentage
0.5-2%, silica 1-3%, zirconium oxide 0.8-1%.
Above-mentioned cement mill ceramic grinding section, it is shaped as intermediate cross-section and amasss positive four ribs maximum, laterally zygomorphic
Platform, edge rounding.
Above-mentioned cement mill ceramic grinding section, it is shaped as cylinder, and edge rounding, sectional dimension is preferably
10mm × 10mm, 15mm × 15mm, the one in 20mm × 20mm, 25mm × 25mm.
Above-mentioned cement mill ceramic grinding section, it is shaped as spindle.
Above-mentioned cement mill ceramic grinding section, it is shaped as goalpost coalition, and centre is cylinder, and two is respectively
For spherical.
The preparation method of above-mentioned cement mill ceramic grinding section, it comprises the following steps:
A () dispensing: take all the components by weight percentage, is mixed and stirred for uniformly, preparing mixed material；Configure PVA simultaneously
Solution, proportioning is PVA: water=(7-10): 100；
(b) ball milling:
(b1) preliminary grinding: the dispensing taken of step (a) being fallen into a trap adds preliminary grinding milling apparatus, and adds ballstone and water, ratio is material:
Ball: water=1:2.5:(0.7-0.75), stop mill to slurry fineness D90≤8 micron, cross 40 mesh sieves and go out mill；
(b2) fine grinding: slurry step (b1) obtained adds fine grinding milling apparatus, and adds ballstone and water, ratio is material: ball:
Water=1:(2-3): (0.7-0.75), to slurry fineness D50≤1.5 micron, D90≤3.2 micron, stop mill；
(b3) mix grinding: is added in the slurry that step (b2) is obtained PVA solution 9-12% of configuration by weight in step (a), mixed
Mill 0.5-1h, crosses 150 mesh sieves and goes out mill, and carry out except ferrum；
(c) mist projection granulating: is added in the slurry that step (b3) is obtained the PVA solution of configuration in appropriate step (a), and squeezes into height
Position slurry tank, controls the hot blast temperature of spray drying tower, leaving air temp and pressure reduction, selects suitably spraying spray sheet diameter, sprays
Mist pelletize, pelletizing crosses 20 mesh sieves；
D () feed bin is old: pelletizing step (c) obtained carries out old, and the old time is no less than 48h；
(e) Profile procoess: powder step (d) obtained becomes base by mould die mould, forming powders moisture control 0.5% with
Under；
F () high temperature sintering: high temperature sagger put into by green compact step (e) obtained, sprinkles parting sand, send in high temperature kiln, temperature
1350-1700 DEG C, firing period 24-36h；
(g) clear powder polishing: parting sand and the burr of product adhesion in sintering process are removed；
H () finished product is dried: be dried product, obtains finished product.
The preparation method of above-mentioned cement mill ceramic grinding section, wherein: step (c) adds the same of PVA solution
Time, it is additionally added appropriate defoamer.
The preparation method of above-mentioned cement mill ceramic grinding section, wherein: step (e) becomes the powder of base for die mould
Granular size controls as 30-80 mesh；Parting sand described in step (f) is the white fused alumina of below 40 mesh.
The preparation method of above-mentioned cement mill ceramic grinding section, wherein: high temperature kiln described in step (f) is tunnel
Kiln, temperature is 1350-1550 DEG C, and firing period is 24-30h.
The preparation method of above-mentioned cement mill ceramic grinding section, wherein: high temperature kiln described in step (f) is shuttle-type
Kiln, temperature is 1450-1700 DEG C, and firing period is 30-36h.
Compared with the prior art, the cement mill of present invention ceramic grinding section, owing to have employed such scheme, first
Constructing Al2O3-CaO-MgO-SiO2 quaternary system, wherein CaO is from calcium carbonate, MgO from magnesium carbonate, and traditional
Tungsten carbide, titanium nitride, zirconium oxide has been increased newly as additive, titanium nitride on the basis of Al2O3-CaO-MgO-SiO2 quaternary system
Fusing point is high, density is relatively low, thermal-shock resistance good, and tungsten carbide hardness is close with diamond, stable chemical nature, zirconium oxide fusing point
Height, hardness are high, the coefficient of expansion is low, and the addition of these additives makes ceramic hardness high, corrosion-resistant, and wearability is good, use the cycle long,
And hardness is high, indeformable, finished product density 3.6-3.9 prepared, the only half of steel material, it is thus possible to effectively economize on electricity, joint
, carbon emission can be reduced；The comprehensive functions such as the tungsten carbide of black and the titanium nitride of yellow, making goods is brownish red or sepia, district
Not in the white of ceramic industry, identification is high, is difficult to obscure；The fineness of finished ground cement can be precisely controlled, prepare simultaneously
The same batch of finished ground cement fineness uniformity gone out, cement performance is more stable, scattered error is little, beneficially quality and safety；Material consumption is low, abrasion
Only less than 2/10000ths, persistently, the replacement cycle long, also make use cost reduce, good economy performance simultaneously；High temperature resistant, will not be at height
Soften under temperature, deform and adhesion, be suitable for long-time, the operating mode of high intensity；Being added on of appropriate tungsten carbide is inconspicuous
Improving its toughness on the premise of affecting its hardness so that it is the most broken in impact, collapse scarce, practicality is good；Various components exist
Under zirconic effect, adhesion is good, and more easy-formation.Shape can use the conventional cylinder of industry, goalpost coalition, it is possible to
Using the round and smooth spindle in corner or laterally zygomorphic positive truncated rectangular pyramids, do not have stress concentration point, be difficult to be crashed, the life-span is longer.
Meanwhile, compared with the prior art, the preparation method of ceramic grinding section of the cement mill in the present invention, owing to adopting
With preliminary grinding, fine grinding, the ball milling of mix grinding three process and step-sizing, make slurry fineness uniformity；Carry out iron removal step, energy
Effectively remove the impurity in slurry, improve ceramic degree of purity；Because aluminium oxide ceramics powder belongs to non-plastic raw material, in order to suppress
The needs of molding, need to add bonding agent, and such as the PVA solution added in mist projection granulating, adding defoamer is to suppress bubble
Foam produces, and improves production capacity, reduces production cost；The old operation of feed bin can effectively remove the moisture in pelletizing；Die mould adds
Work operation makes powder molding；High temperature sintering operation is sprinkled into parting sand, can effectively prevent product adhesion, make burnt product and high temperature
Saggar can be easily separated；Clear powder polishing process removes parting sand and the burr adhered in sintering process, makes product bright and clean；Last
Drying process makes product be fully achieved index of dispatching from the factory.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of several typical structures of the present invention.
In figure: symmetrical above and below and the positive truncated rectangular pyramids 1 of edge rounding, the cylinder 2 of edge rounding, spindle 3, goalpost
Coalition 4.
Detailed description of the invention
Embodiment 1:
This cement mill ceramic grinding section contains aluminium oxide 92%, tungsten carbide 0.5%, calcium carbonate by weight percentage
0.8%, magnesium carbonate 1.2%, titanium nitride 2%, silicon dioxide 2.5%, zirconium oxide 1%, adopts and prepares with the following method:
(a) dispensing: take all the components by weight percentage；Configuring PVA solution, proportioning is PVA: water=8:100 simultaneously；
(b) ball milling:
(b1) preliminary grinding: the dispensing that takes of step (a) being fallen into a trap adds preliminary grinding milling apparatus, and (preliminary grinding ballstone can to add ballstone and water
Use the 92-high alumina isostatic pressed ball of Φ 30-Φ 50mm, lower same), ratio is material: ball: water=1:2.5:0.7, to slurry fineness D90
≤ 8 microns are stopped mill, cross 40 mesh sieves and go out mill；
(b2) fine grinding: the slurry that step (b1) obtained adds fine grinding milling apparatus, and (fine grinding ballstone can be adopted to add ballstone and water
With the 92-high alumina isostatic pressed ball of Φ 15-Φ 25mm, lower with), ratio is material: ball: water=1:2:0.7, to slurry fineness D50≤
1.5 microns, stop mill behind D90≤3.2 micron；
(b3) mix grinding: is added in the slurry that step (b2) is obtained the PVA solution 9% of configuration, mix grinding by weight in step (a)
1h, crosses 150 mesh sieves and goes out mill, and carry out except ferrum；
(c) mist projection granulating: is added in the slurry that step (b3) is obtained the PVA solution of configuration in appropriate step (a), and squeezes into height
Position slurry tank, controls the hot blast temperature of spray drying tower, leaving air temp and pressure reduction, selects suitably spraying spray sheet diameter, sprays
Mist pelletize, pelletizing crosses 20 mesh sieves；
D () feed bin is old: pelletizing step (c) obtained carries out old, and the old time is no less than 48h；
E () Profile procoess: powder step (d) obtained becomes base by mould die mould, is shaped as cylinder, edge rounding,
Sectional dimension is preferably 10mm × 10mm, 15mm × 15mm, 20mm × 20mm, the one in 25mm × 25mm；Forming powders water
Part controls below 0.5%；
F () high temperature sintering: high temperature sagger put into by green compact step (e) obtained, sprinkles 40 whitish eye corundum parting sands, send into tunnel
In kiln, temperature 1550 DEG C, firing period 24h；
(g) clear powder polishing: parting sand and the burr of product adhesion in sintering process are removed；
H () finished product is dried: be dried product, obtains finished product.
Embodiment 2:
This cement mill ceramic grinding section contains aluminium oxide 95%, tungsten carbide 0.5%, calcium carbonate by weight percentage
0.8%, magnesium carbonate 1.2%, titanium nitride 0.5%, silica 1 %, zirconium oxide 1%, adopts and prepares with the following method:
(a) dispensing: take all the components by weight percentage；Configuring PVA solution, proportioning is PVA: water=7:100 simultaneously；
(b) ball milling:
(b1) preliminary grinding: the dispensing taken of step (a) being fallen into a trap adds preliminary grinding milling apparatus, and adds ballstone and water, ratio is material:
Ball: water=1:2.5:0.75, stops mill to slurry fineness D90≤8 micron, crosses 40 mesh sieves and goes out mill；
(b2) fine grinding: slurry step (b1) obtained adds fine grinding milling apparatus, and adds ballstone and water, ratio is material: ball:
Water=1:3:0.75, stops mill to slurry fineness D50≤1.5 micron, D90≤3.2 micron；
(b3) mix grinding: is added in the slurry that step (b2) is obtained the PVA solution 12% of configuration, mix grinding by weight in step (a)
0.5h, crosses 150 mesh sieves and goes out mill, and carry out except ferrum；
(c) mist projection granulating: is added in the slurry that step (b3) is obtained the PVA solution of configuration in appropriate step (a) and appropriate
Defoamer, and squeeze into high-order slurry tank, control the hot blast temperature of spray drying tower, leaving air temp and pressure reduction, select suitably spraying
Spray sheet diameter, carries out mist projection granulating, and pelletizing crosses 20 mesh sieves；
D () feed bin is old: pelletizing step (c) obtained carries out old, and the old time is no less than 48h；
E () Profile procoess: powder step (d) obtained becomes base by mould die mould, is shaped as spindle, forming powders moisture content
Control below 0.5%；
F () high temperature sintering: high temperature sagger put into by green compact step (e) obtained, sprinkles 60 whitish eye corundum parting sands, send into shuttle-type
In kiln, temperature 1450 DEG C, firing period 36h；
(g) clear powder polishing: parting sand and the burr of product adhesion in sintering process are removed；
H () finished product is dried: be dried product, obtains finished product.
Embodiment 3:
This cement mill with ceramic grinding section contain by weight percentage aluminium oxide 92%, tungsten carbide 2%, calcium carbonate 1.7%,
Magnesium carbonate 1%, titanium nitride 0.5%, silicon dioxide 2%, zirconium oxide 0.8%, adopt and prepare with the following method:
(a) dispensing: take all the components by weight percentage；Configuring PVA solution, proportioning is PVA: water=10:100 simultaneously；
(b) ball milling:
(b1) preliminary grinding: the dispensing taken of step (a) being fallen into a trap adds preliminary grinding milling apparatus, and adds ballstone and water, ratio is material:
Ball: water=1:2.5:0.72, stops mill to slurry fineness D90≤8 micron, crosses 40 mesh sieves and goes out mill；
(b2) fine grinding: slurry step (b1) obtained adds fine grinding milling apparatus, and adds ballstone and water, ratio is material: ball:
Water=1:2.5:0.75, stops mill to slurry fineness D50≤1.5 micron, D90≤3.2 micron；
(b3) mix grinding: is added in the slurry that step (b2) is obtained the PVA solution 9% of configuration, mix grinding by weight in step (a)
0.5h, crosses 150 mesh sieves and goes out mill, and carry out except ferrum；
(c) mist projection granulating: is added in the slurry that step (b3) is obtained the PVA solution of configuration in appropriate step (a) and appropriate
Defoamer, and squeeze into high-order slurry tank, control the hot blast temperature of spray drying tower, leaving air temp and pressure reduction, select suitably spraying
Spray sheet diameter, carries out mist projection granulating, and pelletizing crosses 20 mesh sieves；
D () feed bin is old: pelletizing step (c) obtained carries out old, and the old time is no less than 48h；
(e) Profile procoess: powder step (d) obtained becomes base by mould die mould, forming powders moisture control 0.5% with
Under；It is shaped as intermediate cross-section and amasss positive truncated rectangular pyramids maximum, laterally zygomorphic, edge rounding；
F () high temperature sintering: high temperature sagger put into by green compact step (e) obtained, sprinkles 80 whitish eye corundum parting sands, send into tunnel
In kiln, temperature 1350 DEG C, firing period 30h；
(g) clear powder polishing: parting sand and the burr of product adhesion in sintering process are removed；
H () finished product is dried: be dried product, obtains finished product.
Embodiment 4:
This cement mill with ceramic grinding section contain by weight percentage aluminium oxide 92%, tungsten carbide 0.5%, calcium carbonate 3%,
Magnesium carbonate 1%, titanium nitride 0.5%, silicon dioxide 2.2%, zirconium oxide 0.8%, adopt and prepare with the following method:
(a) dispensing: take all the components by weight percentage；Configuring PVA solution, proportioning is PVA: water=9:100 simultaneously；
(b) ball milling:
(b1) preliminary grinding: the dispensing taken of step (a) being fallen into a trap adds preliminary grinding milling apparatus, and adds ballstone and water, ratio is material:
Ball: water=1:2.5:0.7, stops mill to slurry fineness D90≤8 micron, crosses 40 mesh sieves and goes out mill；
(b2) fine grinding: slurry step (b1) obtained adds fine grinding milling apparatus, and adds ballstone and water, ratio is material: ball:
Water=1:2:0.7, stops mill to slurry fineness D50≤1.5 micron, D90≤3.2 micron；
(b3) mix grinding: is added in the slurry that step (b2) is obtained the PVA solution 11% of configuration, mix grinding by weight in step (a)
0.7h, crosses 150 mesh sieves and goes out mill, and carry out except ferrum；
(c) mist projection granulating: is added in the slurry that step (b3) is obtained the PVA solution of configuration in appropriate step (a) and appropriate
Defoamer, and squeeze into high-order slurry tank, control the hot blast temperature of spray drying tower, leaving air temp and pressure reduction, select suitably spraying
Spray sheet diameter, carries out mist projection granulating, and pelletizing crosses 20 mesh sieves；
D () feed bin is old: pelletizing step (c) obtained carries out old, and the old time is no less than 48h；
E () Profile procoess: powder step (d) obtained becomes base by mould die mould, is shaped as goalpost coalition, middle for circle
Cylinder, two is the most spherical；Forming powders moisture control is below 0.5%；
F () high temperature sintering: high temperature sagger put into by green compact step (e) obtained, sprinkles 60 whitish eye corundum parting sands, send into shuttle-type
In kiln, temperature 1700 DEG C, firing period 30h；
(g) clear powder polishing: parting sand and the burr of product adhesion in sintering process are removed；
H () finished product is dried: be dried product, obtains finished product.
Embodiment 5:
This cement mill ceramic grinding section contains aluminium oxide 92%, tungsten carbide 0.5%, calcium carbonate by weight percentage
1.6%, magnesium carbonate 1%, titanium nitride 1%, silicon dioxide 3%, zirconium oxide 0.9%, adopts and prepares with the following method:
(a) dispensing: take all the components by weight percentage；Configuring PVA solution, proportioning is PVA: water=8:100 simultaneously；
(b) ball milling:
(b1) preliminary grinding: the dispensing taken of step (a) being fallen into a trap adds preliminary grinding milling apparatus, and adds ballstone and water, ratio is material:
Ball: water=1:2.5:0.75, stops mill to slurry fineness D90≤8 micron, crosses 40 mesh sieves and goes out mill；
(b2) fine grinding: slurry step (b1) obtained adds fine grinding milling apparatus, and adds ballstone and water, ratio is material: ball:
Water=1:2.5:0.75, stops mill to slurry fineness D50≤1.5 micron, D90≤3.2 micron；
(b3) mix grinding: is added in the slurry that step (b2) is obtained the PVA solution 12% of configuration, mix grinding by weight in step (a)
0.6h, crosses 150 mesh sieves and goes out mill, and carry out except ferrum；
(c) mist projection granulating: is added in the slurry that step (b3) is obtained the PVA solution of configuration in appropriate step (a) and appropriate
Defoamer, and squeeze into high-order slurry tank, control the hot blast temperature of spray drying tower, leaving air temp and pressure reduction, select suitably spraying
Spray sheet diameter, carries out mist projection granulating, and pelletizing crosses 20 mesh sieves；
D () feed bin is old: pelletizing step (c) obtained carries out old, and the old time is no less than 48h；
(e) Profile procoess: powder step (d) obtained becomes base by mould die mould, forming powders moisture control 0.5% with
Under；It is shaped as intermediate cross-section and amasss positive truncated rectangular pyramids maximum, laterally zygomorphic, edge rounding；
F () high temperature sintering: high temperature sagger put into by green compact step (e) obtained, sprinkles 40 whitish eye corundum parting sands, send into shuttle-type
In kiln, temperature 1550 DEG C, firing period 34h；
(g) clear powder polishing: parting sand and the burr of product adhesion in sintering process are removed；
H () finished product is dried: be dried product, obtains finished product.
Described above to the disclosed embodiments, only for making professional and technical personnel in the field be capable of or using this
Invention.Multiple amendment to these embodiments will be apparent from for those skilled in the art, herein institute
The General Principle of definition can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore,
The present invention is not intended to be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty
The widest scope that point is consistent.
Claims (10)
1. a cement mill ceramic grinding section, it is characterised in that: its contain by weight percentage aluminium oxide 92-95%,
Tungsten carbide 0.5-2%, calcium carbonate 0.8-3%, magnesium carbonate 1-1.2%, titanium nitride 0.5-2%, silica 1-3%, zirconium oxide 0.8-
1%。
A kind of cement mill ceramic grinding section the most according to claim 1, it is characterised in that: it is shaped as middle cutting
Area positive truncated rectangular pyramids maximum, laterally zygomorphic, edge rounding.
A kind of cement mill ceramic grinding section the most according to claim 1, it is characterised in that: it is shaped as cylinder
Body, edge rounding, sectional dimension is preferably 10mm × 10mm, 15mm × 15mm, 20mm × 20mm, in 25mm × 25mm
Kind.
A kind of cement mill ceramic grinding section the most according to claim 1, it is characterised in that: it is shaped as spindle
Shape.
A kind of cement mill ceramic grinding section the most according to claim 1, it is characterised in that: it is shaped as goalpost knot
Zoarium, centre is cylinder, and two is the most spherical.
6. a preparation method for a kind of cement mill ceramic grinding section described in any of the above-described claim, its feature exists
In, comprise the following steps:
A () dispensing: take all the components by weight percentage, is mixed and stirred for uniformly, preparing mixed material；Configure PVA simultaneously
Solution, proportioning is PVA: water=(7-10): 100；
(b) ball milling:
(b1) preliminary grinding: the dispensing taken of step (a) being fallen into a trap adds preliminary grinding milling apparatus, and adds ballstone and water, ratio is material:
Ball: water=1:2.5:(0.7-0.75), stop mill to slurry fineness D90≤8 micron, cross 40 mesh sieves and go out mill；
(b2) fine grinding: slurry step (b1) obtained adds fine grinding milling apparatus, and adds ballstone and water, ratio is material: ball:
Water=1:(2-3): (0.7-0.75), to slurry fineness D50≤1.5 micron, D90≤3.2 micron, stop mill；
(b3) mix grinding: is added in the slurry that step (b2) is obtained PVA solution 9-12% of configuration by weight in step (a), mixed
Mill 0.5-1h, crosses 150 mesh sieves and goes out mill, and carry out except ferrum；
(c) mist projection granulating: is added in the slurry that step (b3) is obtained the PVA solution of configuration in appropriate step (a), and squeezes into height
Position slurry tank, controls the hot blast temperature of spray drying tower, leaving air temp and pressure reduction, selects suitably spraying spray sheet diameter, sprays
Mist pelletize, pelletizing crosses 20 mesh sieves；
D () feed bin is old: pelletizing step (c) obtained carries out old, and the old time is no less than 48h；
(e) Profile procoess: powder step (d) obtained becomes base by mould die mould, forming powders moisture control 0.5% with
Under；
F () high temperature sintering: high temperature sagger put into by green compact step (e) obtained, sprinkles parting sand, send in high temperature kiln, temperature
1350-1700 DEG C, firing period 24-36h；
(g) clear powder polishing: parting sand and the burr of product adhesion in sintering process are removed；
H () finished product is dried: be dried product, obtains finished product.
The preparation method of a kind of cement mill ceramic grinding section the most according to claim 6, it is characterised in that: step
C () adds PVA solution while, it is additionally added appropriate defoamer.
The preparation method of a kind of cement mill ceramic grinding section the most according to claim 7, it is characterised in that: step
E () becomes the powder particles size of base to control as 30-80 mesh for die mould；Parting sand described in step (f) is the white of below 40 mesh
Corundum.
9., according to the preparation method of a kind of cement mill ceramic grinding section described in claim 6 or 7 or 8, its feature exists
In: high temperature kiln described in step (f) is tunnel cave, and temperature is 1350-1550 DEG C, and firing period is 24-30h.
10., according to the preparation method of a kind of cement mill ceramic grinding section described in claim 6 or 7 or 8, its feature exists
In: high temperature kiln described in step (f) is shuttle kiln, and temperature is 1450-1700 DEG C, and firing period is 30-36h.
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| CN108043528A (en) * | 2017-12-27 | 2018-05-18 | 丁民修 | The efficient abrasive body grading of submicron particles is prepared for grinding |
| CN110590340A (en) * | 2019-10-29 | 2019-12-20 | 洛阳市科创绿色建材研究院 | Preparation method of andalusite-containing high-wear-resistance alumina grinding body |
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| CN110590340A (en) * | 2019-10-29 | 2019-12-20 | 洛阳市科创绿色建材研究院 | Preparation method of andalusite-containing high-wear-resistance alumina grinding body |
| CN110590340B (en) * | 2019-10-29 | 2022-04-01 | 洛阳市科创绿色建材研究院 | Preparation method of andalusite-containing high-wear-resistance alumina grinding body |
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