CN1273955A

CN1273955A - Production of protecting carbon ring with used carbon block of cathode as raw material

Info

Publication number: CN1273955A
Application number: CN 00114512
Authority: CN
Inventors: 王运江
Original assignee: Zhang Yasu
Current assignee: Zhang Yasu
Priority date: 2000-04-21
Filing date: 2000-04-21
Publication date: 2000-11-22
Anticipated expiration: 2020-04-21
Also published as: CN1111146C

Abstract

A protecting carbon ring is prepared from aggregate of waste carbon black as cathode (52-56%), powder (26-30%) and adhesive (14-18%). Its advantages include simple preparing process, high impact and compression strength, and reuse of waste to prevent environmental pollution.

Description

Waste cathode carbon block is the raw material production carbon protective ring

The present invention relates to a kind of structure unit of electrolyzer, especially a kind of waste cathode carbon block of aluminium cell is the method for raw material production carbon protective ring.

Since the industrial cell aluminium metallurgy, what electrolyzer adopted all is carbon anode and carbon cathode, and anode is separated out and constantly consumed with aluminium, and the use of carbon cathode then is rhythmic, good can be with 4～5 years, carbon cathode life-span of some groove (especially large scale electrolytic cell) even do not reach 1 year.Over more than 100 year, carbon cathode is all outwelled as rubbish after life cycle, because this industrial refuse contains obnoxious flavoures such as HF, the rubbish stockyard has just become a major issue of contaminate environment and business leader headache.With ten thousand tons of series of the 160KA10 of Pingguo Aluminium Industry Corp is example, listing plan of major repair every year in is 80 platform troughs, the amount of every platform trough carbon cathode is 40 tons, annual useless negative electrode rubbish total amount is 3200 tons, the annual pair that on average needs goes out about 100,000 yuan on the rent in rubbish stockyard and blinding second ploughing expense, if environment is polluted also and will impose a fine.And this problem also is not resolved all the time.

The purpose of this invention is to provide a kind of carbon cathode that will give up and recycle, produce carbon protective ring, the cost that both economized in raw materials simplifies production process again, and the waste cathode carbon block of solution problem of environmental pollution is the method for raw material production carbon protective ring.

The technical solution used in the present invention is: be the main material production carbon protective ring with the waste cathode carbon block, wherein useless negative electrode aggregate accounts for 52～56%, and powder accounts for 26～30%, and binding agent accounts for 14～18%.

Positively effect that the present invention produced and advantage highly significant:

1, utilize waste cathode carbon block to produce carbon protective ring, can reduce the carbocyclic ring cost greatly, every secondary carbocyclic ring can reduce cost 1.69 yuan.Produce considerable benefit in enormous quantities.

2, carbocyclic ring of the present invention falls hit intensity and all raisings greatly of ultimate compression strength, facts have proved that can remove calcining process from directly goes up the electrolyzer use, and electrolysis production is had no effect.

3, the every secondary 2.5kg that uses of useless negative electrode particle can consume 1000 tons of useless negative electrodes if produce 400,000 secondary carbocyclic rings, just the useless negative electrode of 100,000 tons of Electrolytic Aluminum Series all can be consumed if produce 1,280,000 secondary carbocyclic rings.

4, a year carbocyclic ring usage quantity that satisfies 130,000 tons of Pingguo Aluminium Industry Corp is 400,000 pairs, can save 167.6 ten thousand yuans, can arrange 30 jobs simultaneously.

5, behind the useless negative electrode of recycling, can save the rent in this considerable industrial refuse stockyard and use and blinding second ploughing expense.

6, useless negative electrode be subjected to rain, the obnoxious flavoures such as can distributing HF that makes moist, serious environment pollution has then thoroughly solved pollution problem after the recycling, its value can't be estimated.

Below in conjunction with embodiment the present invention is done to describe in detail.

Production method of the present invention is: with the waste cathode carbon block crusher in crushing, grind with ball mill again, pulverize in the material, useless negative electrode aggregate accounts for 52～56%, and useless negative electrode powder accounts for 26～30%, and 14～18% binding agent is made up of pitch and coal tar, pitch 7～8%, coal tar 8～10%.Above raw material is sent into the mixed pot of pinching, heat up, normal temperature to 120 ℃ mixed pinching about about 30 minutes, the material that mixes after pinching carries out weighing, enters the hydropress shaped by fluid pressure, promptly gets the carbon protective ring product.

Embodiment:

Waste cathode carbon block is retracted carbon product factory, use crusher in crushing, the powder ball mill grinding, take by weighing: useless negative electrode aggregate 320kg, useless negative electrode powder 173kg, pitch 47kg, coal tar 54kg, above raw material is sent into the mixed pot of pinching, heat up simultaneously, mix and pinch, temperature control is no more than 120 ℃, mix the material of pinching after 30 minutes and carry out weighing, enter the hydropress shaped by fluid pressure, can produce 230 secondary carbocyclic rings.Product directly send electrolysis to install and use.

Claims

1, a kind of waste cathode carbon block is the raw material production carbon protective ring, it is characterized in that: be the main material production carbon protective ring with the waste cathode carbon block, wherein useless negative electrode aggregate accounts for 52～56%, and powder accounts for 26～30%, and binding agent accounts for 14～18%.