CN102489366A

CN102489366A - Method for rapid wet ball milling of electrical porcelain raw materials

Info

Publication number: CN102489366A
Application number: CN2011104574618A
Authority: CN
Inventors: 殷杨合; 唐献文
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2012-06-13

Abstract

The invention relates to a method for rapid wet ball milling of electrical porcelain raw materials, and belongs to the field of high-strength silicate material manufacture. The method provided by the invention is characterized in that a ball mill medium comprises 45 to 95% of Al2O3 and 80 to 98% of SiO2; the Moh's hardness is in a range of 8 to 9.5; the ball size fai is in a range of 15 to 50 millimeters; balls are spherical and elliptic; a ball mill inner liner comprises tiles having Al2O3 content of 50 to 95%; a ratio of raw materials to water to the balls is 1: (0.55 to 0.95): (1.8 to 2.5); and a ball-mill rotating speed is 25 to 28r/min. The optimized method provided by the invention has the advantages that economic benefits are high; ball-milling time is reduced; an annual production amount is improved by 27180 tons; annually consumed electric power is 926000 kilowatt-hours, wherein electric power consumed in ball milling of a ton of the raw materials is reduced to 33.3 kilowatt-hours from 107.42 kilowatt-hours so that an electric power consumption amount of the method provided by the invention is one third of that of the prior art; and because of change of raw materials of the ball mill inner liner and the balls, equipment overhaul time and a risk caused by raw material component change are reduced and product quality is further improved.

Description

A kind of method of method using fast wet ball milling electroceramics raw material

Technical field

The present invention relates to a kind of method of method using fast wet ball milling electroceramics raw material, belong to the silicate high-strength material and make the field.

Technical background

Along with developing rapidly of domestic and international power industry, various ehv power transmission equipment need a large amount of large distance high strength high tension insulators, and the electroceramics industry was exactly the industry of a high energy consumption, heavily contaminated originally; Advocate energy-saving and emission-reduction in current society; Under the prerequisite of " low-carbon (LC) " life, important procedure ball-milling technology in the electric porcelain production is optimized innovation; Not only can bring benefit, importantly create bigger social benefit to enterprise.Domestic majority electroceramics, ceramic industry are in process of production; For several kinds of raw materials are mixed; Satisfy certain particle and form, accelerate physics and chemical reaction velocity in calcination process, improve electroceramics intensity; Then a large amount of raw material balls is milled to tens of microns granularity, this is the inaccessible and one procedure can only ball milling accomplished of other equipment.

In ball-milling technology in the past, adopt old process, shortcoming is more: 1, ball milling overlong time, elongated whole production cycle operation; 2, energy consumption is bigger; 3, because too much and for a long time wearing and tearing of medium increased the uncertainty of composition of raw materials.Simply say to be exactly a grinding efficiency problem.

Address this problem, aspect three, explore, i.e. the volume density of abrasive body, size and shape.The volume density of abrasive body is high, and is just strong to the percussion of material; The profile of abrasive body is also not little to the influence of ball milling, be mostly the line contact between the oval abrasive body, and be the some contact between the spherical grinding body, and the impulsive force of spherical grinding body is strong, and ellipsoidal grainding capacity is strong; The size of abrasive body is also not little to the influence of ball milling, and big abrasive body percussion is strong, and little abrasive body surface area is big, and abrasive action is strong.

1, the ratio of material, water, ball.During ball milling, material is big to the ball milling influence with the ratio of water, when water is very few, and the mud thickness, concentration is bonded at greatly on the ballstone, weakens percussion and abrasive action.During dilutional hyponatremia, the mud dilution, ballstone skids each other, reduces with the rotating lifting height of cylindrical shell, and grinding efficiency descends.

2, the ratio between material and the ballstone.If ballstone is too much, must reduce the useful load of raw material, influence production capacity.

3, the influence of ball mill liner.The ball mill liner mainly is the protection grinding machine, prevents the effect that cylindrical shell weares and teares, and adopts common silica liner originally, and intensity is low, and wearing and tearing are big, and service time is short, causes and changes frequently, and influence is produced.

Summary of the invention

The object of the invention is exactly the defective that overcomes prior art, and a kind of method of method using fast wet ball milling electroceramics raw material is provided.

Technical scheme of the present invention realizes through following approach, ball mill medium A l ₂O ₃Content is 45%～95% and SiO ₂80%～98%, hardness is Morse 8～9.5, and the size of ballstone is Φ 15mm～Φ 50mm, ballstone be shaped as sphere and ellipse; The ball mill liner is Al ₂O ₃, the ceramic tile of content 50%～95%; The ratio of material, water, ballstone is 1: 0.55～0.95: 1.8～2.5; Rotating speed is 25～28/ minutes.

Behind this process optimization, remarkable in economical benefits.From the ball milling capacity of gross tonnage, adopted 8 1.5 tons and 35 tons of ball mills originally, its power of motor summation is 186kw, the whole year production ability has only 9720 tons, power consumption 104.42 ten thousand degree; Change 1 15 tons and 1 12 tons of two table grinders replacement at present; And the power of motor summation has only 130kw, owing to optimized whole technological parameter, has shortened the ball milling time; The whole year production capability improving is 27180 tons; Power consumption 92.6 ten thousand degree, ton porcelain raw material ball abrasion electricity drops to 33.3 degree by 107.42 original degree, is merely original 1/3 power consumption.Simultaneously, because liner, the change of ballstone material has reduced the risk that equipment rebuilding time and material composition change, and product quality is further ensured.

The specific embodiment

Specifically describe the specific embodiment of the present invention below.

Ballstone hardness of the present invention is selected Morse 8～9.5 for use, and the size of ballstone is Φ 15mm～Φ 50mm, ballstone be shaped as sphere and ellipse; The ratio of material, water, ball is 1: 0.55～0.95: 1.8.0～2.5; The ball mill liner is the aluminium oxide ceramic liner.Ball mill adopts the large-tonnage ball mill.

Al in the ball mill liner ₂O ₃Content be 50%～95%, ball mill medium A l ₂O ₃Content is 45%～95%, SiO ₂80%～98%.

Core of the present invention is how to improve the grinding efficiency problem; To the operation principle and the practical operation of ball mill, to ballstone shape hardness, the aspects such as ratio of size and material, water, ballstone are improved respectively; Selecting for use by original Morse 6.5～7 of ballstone hardness is increased to 8～9.5; The size of ballstone (abrasive body) is reduced to by Φ 60～Φ 120mm. Φ 15～Φ 50mm, and shape changes sphere and ellipse into by inconsistent shapes such as prismatic, egg type, hexagon, squares, makes ball mill in production run, increase the hardness and the probability of collision and pulverizing electroceramics raw material like this; Increased the surface area of ballstone contact electroceramics raw material; Reduced the space of ballstone and raw material, simultaneously, the ratio of material, water, ball in the production run of adjustment ball mill carrier.By original material: water: ballstone=1: 1～1.2: 1.5～1.8 change 1: 0.55 into～and 0.95: 1.8～2.5, reduce water consumption, increase the ballstone of some, make to reach good proportioning between the three, reduce invalid work done.

Adopt the large-tonnage ball mill to replace original small grinder; Change the ball mill liner into the aluminium oxide ceramic liner by the ordinary silicon material; Increased liner intensity; And the relative electroceramics material composition of alumina ceramics is useful, has reduced because the influence that the material composition that ball milling brings changes has greatly improved grinding efficiency.

Claims

1. the method for a method using fast wet ball milling electroceramics raw material is characterized in that:

A) ballstone hardness is selected Morse 9～9.5 for use, and the size of ballstone is Φ 15mm～Φ 50mm, ballstone be shaped as sphere and ellipse;

B) ratio of material, water, ball is 1: 0.55～0.95: 1.8～2.5;

C) the ball mill liner is the aluminium oxide ceramic liner.

2. the method for a kind of method using fast wet ball milling electroceramics raw material according to claim 1 is characterized in that described ball mill adopts the large-tonnage ball mill.

3. the method for a kind of method using fast wet ball milling electroceramics raw material according to claim 1 is characterized in that Al in the described ball mill liner ₂O ₃Content be 50%～95%.

4. the method for a kind of method using fast wet ball milling electroceramics raw material according to claim 1 is characterized in that described ball mill medium A l ₂O ₃Content is 45%～95%, SiO ₂80%～98%.