CN1066812A

CN1066812A - The making method of hollow graphite electrode and particular manufacturing craft

Info

Publication number: CN1066812A
Application number: CN 92104674
Authority: CN
Inventors: 赵杰三
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-18
Filing date: 1992-06-18
Publication date: 1992-12-09

Abstract

The present invention relates to smelt the making method and the particular manufacturing craft of the hollow graphite electrode of usefulness.

Characteristics of the present invention are in the electrode vibration moulding, at existing outer mold center the internal mold mould are housed, and make hollow graphite electrode, through roasting, and bituminizing and fast curve greying processed finished products.This method is simple, does not increase expense, product good thermal shock, saves energy, dipping rate of body weight gain height.

Description

The making method of hollow graphite electrode and particular manufacturing craft

According to national standard, the specification of quality of Graphite Electrodes is mainly littler than resistance, the intensity height, but along with the appearance of superpower, uhp electric arc furnace, Graphite Electrodes is had higher requirement, Here it is requires Graphite Electrodes to have higher anti-thermal shock ability, promptly under higher current load, under the situation of the hurried variation of temperature, Graphite Electrodes not crackle, do not rupture, can stably work.More external for this reason manufacturing firms, for improving the anti-thermal shock ability of Graphite Electrodes, adopted the acicular petroleum coke of special manufacturing to make raw material, produce the little superpower of the coefficient of expansion, ultra-high power graphite electrode, this method, because cost of material is too expensive, the cost height, the manufacturing firm that also has utilizes the method that changes the Graphite Electrodes shape, for example, the solid Graphite Electrodes of moulding is reprocessed into coreless armature with machinery, and this coreless armature discharges stress when the hurried variation of temperature, avoid crackle and fracture, while available common petroleum Jiaozhuo raw material production superpower, ultra-high power graphite electrode, but this method complex process, processing difficulties is also wasted graphite material simultaneously, raise the cost, therefore do not applied.

Purpose of the present invention is the shortcoming and deficiency in order to overcome above-mentioned prior art just, and the internal mold mould of concentric is housed in existing outer mold, and make electrode in vibratory compaction, once make hollow graphite electrode, thereby reduced operation, improved the thermal shock resistance of product.

The objective of the invention is to realize by following technical proposal: the making method of this hollow graphite electrode, comprise with common petroleum Jiaozhuo raw material, through calcining, broken batching, mix pinch, operations such as moulding, roasting, bituminizing, greying, processed finished products.It is characterized in that simultaneously in Graphite Electrodes vibratory compaction, in the existing outer mold that adopts hollow internal mold mould is housed, once make hollow graphite electrode, after the moulding, mould is placed level attitude, extract hollow inner mold out with handle, roasting is after bituminizing directly carries out fast curve greying, last processed finished products.

Making method of the present invention; the particular manufacturing craft that adopts; comprise outer mold; it is characterized in that in outer mold, being equipped with the hollow internal mold mould of concentric; hollow internal mold mould is by being bolted on the shaking table by fastening mould; bottom centre has the circular cone bench-type strongback of internal thread hole; the bottom is welded on the strongback; there is opening the upper end; there is the internal mold hollow cylinder of dividing plate the centre, movable right cylinder of internal mold and the spring on the dividing plate of internal mold hollow cylinder is housed at internal mold hollow cylinder upper end open place slidably forms.

Owing to adopted technique scheme and particular manufacturing craft, made the present invention have following advantage and positively effect:

1, method is easy, does not increase cost;

2, when bituminizing,, can improve rate of body weight gain 3-5% because pitch immerses simultaneously from hollow about two aspects;

3, the electrode that dipping is good does not need to carry out roasting, can directly enter graphitization process, has saved calcining process, has reduced expense;

4, adopt fast curve to carry out greying, saved electric energy;

5, product density height, the intensity height, whole anti-thermal shock ability is strong.

Description of drawings

Fig. 1 is the mould synoptic diagram that making method of the present invention is used

Below in conjunction with accompanying drawing technology of the present invention is further described:

The particular manufacturing craft that making method of the present invention is used comprises outer mold (4); the hollow internal mold mould of concentric is housed in outer mold; hollow internal mold mould is fixed on the shaking table by the bolt (1) by fastening mould; bottom centre has the circular cone bench-type strongback (7) of internal thread hole (12); the bottom is welded on the strongback; there is opening the upper end; there is the internal mold hollow cylinder (8) of dividing plate (5) centre, movable right cylinder (10) of internal mold and the spring on the dividing plate of internal mold hollow cylinder (9) is housed at internal mold hollow cylinder upper end open place slidably forms.

After the mixed thickener of pinching is filled in the outer mold, weight (2) descends, start pumped vacuum systems (11), Vibration on Start-up platform (6), after the movable right cylinder of pressure head (3) contact inner mold of weight, because the telescopic action of spring, movable right cylinder descends with weight, finish up to vibration, rise weight, mould is placed level attitude with windlass, extract hollow cylinder out, with oil press the Graphite Electrodes blank is pushed out from mould, the internal thread hole on will shake hands (13) bolt and the strongback is tightened, and draws and hollow mould can be pulled out with hand one.Through roasting, bituminizing directly carries out fast curve greying then, and last processed finished products has promptly been finished making hollow graphite electrode process.

Claims

1, a kind of making method of hollow graphite electrode, comprise with common petroleum Jiaozhuo raw material, through calcining, broken batching, mix pinch, operations such as moulding, roasting, bituminizing, greying, processed finished products, it is characterized in that simultaneously in Graphite Electrodes vibratory compaction, hollow internal mold mould is equipped with in employing in existing outer mold, make hollow graphite electrode, after the moulding, mould is placed level attitude, extract hollow internal mold mould out with handle, after the roasting, directly carry out fast curve greying, last processed finished products through bituminizing.

2, the particular manufacturing craft used of a kind of hollow graphite electrode making method, comprise outer mold, it is characterized in that being equipped with in outer mold the hollow internal mold mould of concentric, the internal mold mould is by by being bolted on the shaking table of fastening mould, and bottom centre has the circular cone bench-type strongback of internal thread hole; The bottom is welded on the strongback, and there is opening the upper end, and there is the internal mold hollow cylinder of dividing plate the centre; Be equipped with at internal mold hollow cylinder upper end open place that slidably the movable right cylinder of internal mold and the spring on the dividing plate of internal mold hollow cylinder are formed.