CN1044304A

CN1044304A - Boron monoxide cellulose product and manufacture method thereof

Info

Publication number: CN1044304A
Application number: CN 89105007
Authority: CN
Inventors: 李广田
Original assignee: Yan Wengong Feng Sufan
Current assignee: Yan Wengong Feng Sufan
Priority date: 1989-01-17
Filing date: 1989-01-17
Publication date: 1990-08-01
Anticipated expiration: 2004-01-17
Also published as: CN1022367C

Abstract

This invention is a kind of industrial production carbon product and manufacture method thereof, this kind carbon product is characterised in that, its surface scribbles boron or boride, perhaps infiltration has in boron or boride, the manufacture method and comprises operations such as solution preparation, workpiece infiltration, oven dry in its upper layer certain thickness, compare with the normal carbon goods, significantly improve the work-ing life of this kind product.

Description

Boron monoxide cellulose product and manufacture method thereof

This invention is a kind of industrial production carbon product and manufacture method thereof.As is well known, carbon product has advantages such as higher intensity, corrosion-resistant, Heat stability is good, easy conductive under the condition of high temperature, therefore in industry, particularly production fields such as metallurgy, chemical industry, obtain using, for example plumbago crucible, build by laying bricks or stones at the bottom of the State of Blast Furnace and carbon brick that cupola well is used etc., what wherein consumption was maximum is the Graphite Electrodes that must use in the Electric furnace steel making.

Carbon product has reasonable use properties, but its production process is comparatively complicated, power consumption is more, so production cost is higher, and in use owing to generally all be under the hot environment, the surface of carbon product contacts with air, and oxidation easily is a kind of consumable supply, for example the consumption of the Graphite Electrodes of Electric furnace steel making is 5～8 kilograms of/ton steel, and this has increased the goods and materials cost of steel-making undoubtedly.

Keeping on the existing characteristic basis of carbon product, be purpose of the present invention the work-ing life of improving existing normal carbon goods, the contriver studies for this reason, produce a kind of surface and be coated with last layer boron or boride or in the upper layer certain thickness of normal carbon goods, be impregnated into boron or boride, the purpose of invention is met at the normal carbon goods.

This design of inventing mutually is as follows.The consumption of carbon product mainly is by its oxidized causing in surface, want to improve the life-span of carbon product, it is exposed in Working environment just should at first to avoid taking place the carbon product surface, even perhaps expose the possibility that also should reduce with oxygen generation chemical reaction, intend taking two kinds of ways for this reason, a kind of is to be coated with the last layer antioxidant on the surface of carbon product, allows this material and oxygen react under the condition of high temperature, the protection carbon product; The 2nd, adopt the way of infiltrating, antioxidant is infiltrated up in the upper layer of carbon product, allow it at first react with oxygen.By aforementioned inventive concept as seen, finding this antioxidant, adopt suitable method that it is sprayed on the surface of carbon product or be infiltrated up in the upper layer of carbon product, is the difficult point of this invention, also is its feature place.

According to the top inventive concept of saying, the researchist selects for use multiple goods and materials to carry out repetition test, and tests its result and screen, and last conclusion is to adopt boron or boride best results.

Content of the present invention specifically comprises

1, the product invention of boron monoxide cellulose product.To the invention product say concrete: be a kind of treated industrial production carbon product, the Graphite Electrodes that particularly a kind of Electric furnace steel making is used, this kind product has identical structure and geometrical shape with present carbon product, it is characterized in that scribbling on the surface of present normal carbon goods infiltrates in boron or boride or the upper layer certain thickness at the normal carbon goods boron or boride.Here said boride is meant that mainly borax, boric acid, boron fibre etc. contain boron substance.

Now the surface that new invention is come out scribbles that infiltration has the carbon product unification of boron or boride to be referred to as the boron monoxide cellulose product in the carbon product of boron or boride and the upper layer certain thickness, distinguishes mutually with common carbon product with this.

2, produce the method invention of boron monoxide cellulose product.Method has two kinds, and the one, the method for spraying adopts usual manner, no feature substantially; The 2nd, the method for infiltration comprises technological processs such as obtain solution, workpiece infiltration, oven dry in the infiltration, wherein:

(1), obtain solution is meant that with boron or boride be solute, is solvent with water, percentage concentration is calculated by weight, strength of solution is 5-40%.Certainly concentration is high more good more.

(2), workpiece infiltration is meant with common carbon product to serve as to handle part, is placed in the solution that the boron for preparing or boride are housed, the infiltration some hrs is till corresponding the reaching capacity of infiltration amount of solute in the upper layer certain thickness that is being soaked workpiece.

(3), oven dry be meant will infiltrate carbon product oven dry or airing, reach surperficial and inside does not have till the existence of free-water.

When the boron monoxide cellulose product places hot conditions following time, can generate one deck fusing point oxide film on the low side, comparatively fine and close on its surface, this film has limited contact, the oxidation of oxygen with graphite carbon in the film, and then has prolonged the work-ing life of carbon product.Still be example with the Graphite Electrodes now, under same electric steelmaking process condition, the consumption of electrode that uses the common graphite electrode to smelt is 5 kilograms of/ton steel, uses boronation graphite electrode consumption amount to be about 4 kilograms of/ton steel, reduces specific electrode consumption about 20%, and effect is remarkable.

The advantage of this invention product is obviously to increase than normal carbon goods in the life-span of boron monoxide cellulose product, and treatment process is simple, very easily implements.

Enforcement has been tested in this invention under situation about holding in close confidence, with 5-7.5 ton electric furnace with ordinary electrode place concentration be 30%(by weight percentage concentration calculate) boric acid solution, infiltrate 4 hours, dry then, the result of its use is as previously mentioned.

Claims

1, a kind of industrial production carbon product, particularly a kind of Graphite Electrodes of Electric furnace steel making production usefulness, this kind carbon product has identical structure and geometrical shape with the normal carbon goods, it is characterized in that scribbling on the surface of normal carbon goods infiltrates in boron or boride or the upper layer certain thickness at common carbon product boron or boride.

2, a kind of method of making carbon product, this method serve as to handle workpiece with existing normal carbon goods, it is characterized in that comprising in this kind method operations such as obtain solution, workpiece infiltration, oven dry, wherein:

(1), obtain solution is meant that with boron or boride be solute, is that to make weight percent concentration be 5～40% boron or boride solution to solvent with water;

(2), the workpiece infiltration is meant and common carbon product is put in dried aforesaid boron or the boride solution infiltration some hrs;

(3), oven dry is meant carbon product oven dry or the airing that will infiltrate.