CN1772681A - Waste magnesia carbon brick regenerating and utilizing process - Google Patents

Abstract

The waste magnesia carbon brick regenerating and utilizing process includes the following steps: 1. sorting to eliminate dreg, mud and other impurity; 2. mixing and crushing to 8-20 mm size grains; 3. eliminating carbon via burning in burning pond at 1350-1450 deg.c for 8-12 hr; and 4. cooling naturally and re-crushing to 8 mm below size. The regenerated material is used as the basic refractory material for steel ladle.

Description

The regeneration method of waste magnesia carbon brick

Technical field

The present invention relates to a kind of regeneration method of refractory materials, especially relate to a kind of regeneration method of waste magnesia carbon brick.

Background technology

In recent years, develop rapidly along with China is steel, the annual refractory materials quantity that consumes reaches about 8,000,000 tons, with after the refractory materials scrapped have 3,000,000 tons at least, these industrial refuses have not only taken a large amount of spaces, also polluted environment, had many manufacturers all managing, be not resolved yet so far but build the regeneration problem of building the waste magnesia carbon brick that ladle uses to these industrial refuses Application and Development in addition.

Summary of the invention

The regeneration method of the waste magnesia carbon brick that the object of the invention is to provide a kind of and turns waste into wealth, economizes on resources.

For achieving the above object, the present invention can take following technical proposals:

The regeneration method of waste magnesia carbon brick of the present invention is characterized in that: it comprises following procedure of processing:

A, pick:

The waste magnesia carbon brick that reclaims is carried out the classification pick, remove wherein residue, earth and other impurity, and bricks such as magnalium carbon that will be wherein, chromium aluminium silicon carbide are chosen;

B, homogenizing, fragmentation:

The waste magnesia carbon brick that pick is gone out mixes, and is crushed into the particle between the 8-20mm then, obtains unburned particulate material;

C, de-carbon:

The second step gained particulate material that takes a morsel is put into combustion cell and is lighted, and progressively adds this particulate material during to hyperactivity of fire again, adds while burning, and till the pond was full, the interior temperature of maintenance combustion cell was 8 hours-12 hours at 1350 ℃-1450 ℃, combustion time;

D, secondary breaking, screening:

Behind the particulate material naturally cooling behind the de-carbon, be crushed to the following particle of 8mm once more, promptly obtain the basic raw material of ladle after mixing with refractory materials.

The invention has the advantages that steel scrap is wrapped the exhausted waste magnesia carbon brick obtains regeneration feed through the aforesaid method processing, the overall utilization that makes waste magnesia carbon brick is near 80%, and this raw material can be respectively applied in the molded article and indefinite form goods of refractory materials.Use in molded article, the magnesia carbon brick that slag lining uses described regeneration feed to make can make per ton cost reduce about 700 yuan, and the magnesia carbon brick that indentured position uses described regeneration feed to make can make per ton cost reduce about 300 yuan; In the indefinite form goods, use, can make 250 yuan of the cost reductions per ton of bag mouthful mould material, more than 200 yuan of the cost of chamotte reduction per ton.Because the reproducible utilization of waste magnesia carbon brick not only makes the industrial refuse of leaving over for a long time obtain removing and utilizing, and has protected environment, makes enterprise obtain very big economic return simultaneously, kills two birds with one stone; On macroscopic view, also help alleviating the problem of national mining deposits anxiety, have huge social economic benefit and wide market application prospect.

Embodiment

The regeneration method of waste magnesia carbon brick of the present invention is characterized in that: it comprises following procedure of processing:

A, pick:

The waste magnesia carbon brick that reclaims is carried out the classification pick, remove wherein residue, earth and other impurity, and bricks such as magnalium carbon that will be wherein, chromium aluminium silicon carbide are chosen;

B, homogenizing, fragmentation:

The waste magnesia carbon brick that pick is gone out mixes, and is crushed into the particle between the 8-20mm then, obtains unburned particulate material;

C, de-carbon:

The second step gained particulate material that takes a morsel is put into combustion cell and is lighted, and progressively adds this particulate material during to hyperactivity of fire again, adds while burning, and till the pond was full, the interior temperature of maintenance combustion cell was 8 hours-12 hours at 1350 ℃-1450 ℃, combustion time;

D, secondary breaking, screening:

Behind the particulate material naturally cooling behind the de-carbon, be crushed to the following particle of 8mm once more, promptly obtain the basic raw material of ladle after mixing with refractory materials.

Claims (1)

1, a kind of regeneration method of waste magnesia carbon brick, it is characterized in that: it comprises following procedure of processing:

A, pick:

The waste magnesia carbon brick that reclaims is carried out the classification pick, remove wherein residue, earth and other impurity, and bricks such as magnalium carbon that will be wherein, chromium aluminium silicon carbide are chosen;

B, homogenizing, fragmentation:

The waste magnesia carbon brick that pick is gone out mixes, and is crushed into the particle between the 8-20mm then, obtains unburned particulate material;

C, de-carbon:

The second step gained particulate material that takes a morsel is put into combustion cell and is lighted, and progressively adds this particulate material during to hyperactivity of fire again, adds while burning, and till the pond was full, the interior temperature of maintenance combustion cell was 8 hours-12 hours at 1350 ℃-1450 ℃, combustion time;

D, secondary breaking, screening:

Behind the particulate material naturally cooling behind the de-carbon, be crushed to the following particle of 8mm once more, promptly obtain the basic raw material of ladle after mixing with refractory materials.