CN107162611A - The resource recycle method of carbon containing waste and old refractory brick - Google Patents

The resource recycle method of carbon containing waste and old refractory brick Download PDF

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CN107162611A
CN107162611A CN201710386608.6A CN201710386608A CN107162611A CN 107162611 A CN107162611 A CN 107162611A CN 201710386608 A CN201710386608 A CN 201710386608A CN 107162611 A CN107162611 A CN 107162611A
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waste
refractory brick
old refractory
parts
carbon containing
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徐华
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Changxin Huayue Refractory Material Factory
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Changxin Huayue Refractory Material Factory
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C—CHEMISTRY; METALLURGY
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    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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Abstract

The invention provides the resource recycle method of carbon containing waste and old refractory brick, its process flow steps is by the classification of waste and old refractory brick, selection, on the basis of reworked material gross mass, according to 85%~90% Al2O3, 0.5%~3.5% SiO2, 1.5%~4.5% MgO, 0.5%~1.5% ZrO2, surplus is that the proportioning of impurity carries out dispensing, broken, iron removal by magnetic separation, gradation, heat drying, and high pressure is formed by a firing after charging kneading, and regeneration high-alumina brick is obtained after cooling.The present invention is using waste and old refractory brick generation regeneration high-alumina brick, and technique is simple, it is possible to reduce the waste to waste and old refractory brick, is conducive to the regeneration of waste material and the raising of added value；The regeneration high-alumina brick produced using waste and old refractory brick as raw material has good resistance to heat shocks and pressure-resistant performance, with considerable economic benefit.

Description

The resource recycle method of carbon containing waste and old refractory brick
Technical field
The present invention relates to technical field of refractory materials, more particularly to a kind of high carbon containing waste and old refractory brick of regeneration rate Resource recycle method.
Background technology
In recent years, with the swift and violent growth of China's iron and steel output, the consumption of domestic refractory material is also greatly increased, wherein Waste and old refractory material proportion reaches the 45% of refractory material total flow, and the processing mode of current waste and old refractory material Be still it is most of be taken as industrial refuse to bury, only utilized on a small quantity by coarse.Waste and old refractory material is taken as garbage disposal Fall, this not only adds processing cost, certain pollution is caused to environment, the resource of preciousness is wasted again, very unfortunately.Mesh Before, domestic waste refractory materials reuse ratio is not high, its Land use systems excessively simple, unification, not with advanced technology It is combined.
" a kind of method that recycling discards magnesite-dolomite refractories ", its notification number are disclosed in Chinese patent literature For CN 105481351A, the invention is calcareous to discarded magnesium by process procedures such as cutting, crushing, screening, dispensing, granulation, sintering Dross layer, the metamorphic layer of refractory material take recycling, can largely handle discarded magnesia-calcium brick, realize the calcareous fire proofed wood of magnesium The recycling of material.But, the invention is not high to the recovery utilization rate for discarding magnesite-dolomite refractories, in addition, not right The basic performance indices of reconstituted product detect that its performance can not be guaranteed.Therefore, how to strengthen and economize on resources and environmental protection meaning Know, using technological innovation as power, improve the regeneration rate of waste and old refractory material, exploitation high-performance reconstituted product is this area skill Art personnel technical problem urgently to be resolved hurrily.
The content of the invention
The present invention causes the wasting of resources, then make profits to overcome current domestic waste refractory materials processing mode unreasonable With rate, there is provided a kind of resource recycle method of the high carbon containing waste and old refractory brick of regeneration rate the problem of not high.
To achieve these goals, the present invention uses following technical scheme：
The resource recycle method of carbon containing waste and old refractory brick, comprises the following steps：
(1) waste and old refractory brick is divided into magnesium carbonaceous, magnalium carbonaceous, four kinds of classifications of aluminium carbonaceous and aluminium silicon carbide carbonaceous；
(2) classified waste and old refractory brick in selection step (1), on the basis of reworked material gross mass, according to following component content Proportioning carries out dispensing：85%~90% Al2O3, 0.5%~3.5% SiO2, 1.5%~4.5% MgO, 0.5%~ 1.5% ZrO2, surplus is impurity, obtains reworked material；
(3) reworked material is crushed, obtains regenerated granule material, and iron removal by magnetic separation is carried out to regenerated granule material；
(4) regenerated granule material after iron removal by magnetic separation is subjected to gradation；
(5) regenerated granule material after classification is thermally dried；
(6) weighing is first carried out according to the proportioning of following parts by weight：65 parts of regenerated granule material, 15 parts of thermosetting resin, 8 parts of graphite, 12 parts of aluminum oxide regenerative micro powder, 10 parts of corundum powder, 5 parts of pitch, then charging kneading is carried out, charging sequence is：First add regeneration Particulate material, adds the thermosetting resin for accounting for thermosetting resin total amount 2/3, then sequentially add graphite, aluminum oxide regenerative micro powder, Remaining thermosetting resin, is eventually adding corundum powder and bonding agent, 20~30min of batch mixing under the conditions of 60~80 DEG C；
(7) mixture obtained by step (6) is subjected to high-pressure molding, burnt in 1200 DEG C~1500 DEG C of hyperthermia tunnel Kiln Into 6~8h of insulation obtains regenerating high-alumina brick after cooling.
In step (1), the dry slag layer impurity on waste and old refractory brick surface is removed while classification.Added in reworked material suitable The magnesia of amount can burn agent as rush so that be more densified in product sintering process, while can also pass through filled articles Middle stomata, improves the bulk density of regeneration high-alumina brick so that the performance of regeneration high-alumina brick is lifted accordingly.In regeneration high alumina A small amount of zirconium oxide is added in the formula of brick, obvious toughening effect can be produced to regeneration high-alumina brick, its principle is as follows：Should The thermal coefficient of expansion of aluminum oxide in system is big, and modulus of elasticity is high, acts on strong to the constraint of zirconia particles after sintering cooling, faces Boundary diameter Dc is larger, and tetragonal zircite particle can more effectively be remained with more, therefore, and the toughness reinforcing for regenerating high-alumina brick is imitated Fruit is also obvious, so as to reach the effect for improving its resistance to heat shocks, the intensity of obtained regeneration high-alumina brick is big, non-breakable, Usage cycles are long.
The carbonation rate of thermosetting resin is high, caking property is good, and the blank strength of shaping is high, can strengthen the property of regeneration high-alumina brick Can, thermosetting resin is added in two steps during charging kneading, batch mixing can be more uniformly distributed, be added regeneration high-alumina brick Consistency.Graphite has high temperature resistant, heat conduction, conduction, lubrication, plastic and anticorrosive etc. performance, add graphite can make it is obtained The thermal conductivity of high-alumina brick, thermal shock resistance is regenerated to significantly improve.Fired, worked using countercurrent action using hyperthermia tunnel Kiln, it has There are preheating zone, clinkering zone, the temperature of the part of cooling zone three, certain temperature range can be kept, regeneration high-alumina brick is easily mastered Burn till rule, therefore obtained regeneration high-alumina brick quality preferably, breakage rate is low.
Preferably, on the basis of regenerated granule material gross mass, in step (4) after gradation gained regenerated granule material Grade and weight/mass percentage composition be respectively：The particle that 5~3mm particle accounts for 25%~35%, 3~1mm accounts for 45%~55% 10%~25% is accounted for 0.5~0.1mm particle.
The consistency of the paired base substrate of particle group of blank has a great impact, and certain amount is added in the composition of bulky grain The less particle of size, is filled in the gap of bulky grain, and the porosity of base substrate can be caused to decline, bulk density increase, makes embryo Body becomes the product with certain size, shape and structural strength so that the bulk density of material, compressive resistance and high temperatures It can be improved, be obviously improved the physicochemical property of regeneration high-alumina brick.
Preferably, the process conditions of heat drying are in step (5)：5~10 DEG C/min of heating rate, is warming up to 350 5~8h is incubated after DEG C, control heating rate to be heated evenly in the sintering procedure of regeneration high-alumina brick, and not easy to crack, increase makes Use intensity.
Preferably, the thermosetting resin, which is T60, contains carbon resin and phenolic resin, the T60 contains carbon resin and phenolic aldehyde The mass ratio of resin is 1：(2~4).
It is bonding agent to contain carbon resin and phenolic resin present invention uses T60, does not produce harmful smoke using process, has Environmental protection characteristic.Specifically, T60 can still keep preferable mobility containing carbon resin below 200 DEG C, and phenolic resin is 200 Begin to solidify when below DEG C, solidification rate is very fast, the two use under proper proportion can obtain preferably extruding depth. In addition, after T60 hot settings containing carbon resin, " mushroom " mud drum can be being formed, increase regeneration high-alumina brick bond area is improved The flushing resistance of high-alumina brick is regenerated, so as to increase the service life.
Preferably, the particle diameter of the graphite is 50~150 mesh.
Preferably, the pressure limit of step (7) mesohigh shaping is obtained in 200~260Mpa, this pressure limit High-alumina brick bulk density is high, and performance is good.
The present invention has the advantages that：
(1) using waste and old refractory brick generation regeneration high-alumina brick, technique is simple, it is possible to reduce the waste to waste and old refractory brick；
(2) recycling of waste and old refractory material is conducive to the regeneration of waste material and the raising of added value；
(3) the regeneration high-alumina brick produced using waste and old refractory brick as raw material has good resistance to heat shocks and pressure-resistant performance, tool There is considerable economic benefit.
Embodiment
Below by specific embodiment, technical scheme is described in further detail.
In the present invention, if not refering in particular to, all devices and raw material are commercially available or the industry is conventional, following Method in embodiment, is this area conventional method unless otherwise instructed.
Embodiment 1
(1) waste and old refractory brick is divided into magnesium carbonaceous, magnalium carbonaceous, four kinds of classifications of aluminium carbonaceous and aluminium silicon carbide carbonaceous；
(2) classified waste and old refractory brick in selection step (1), on the basis of reworked material gross mass, according to following component content Proportioning carries out dispensing：85% Al2O3, 0.5% SiO2, 1.5% MgO, 0.5% ZrO2, surplus is impurity, is obtained again Raw material；
(3) reworked material is crushed, obtains regenerated granule material, and iron removal by magnetic separation is carried out to regenerated granule material；
(4) regenerated granule material after iron removal by magnetic separation is subjected to gradation, on the basis of regenerated granule material gross mass, middle particle point The grade and weight/mass percentage composition of the regenerated granule material of gained are respectively after level：5~3mm particle accounts for 35%, 3~1mm The particle that grain accounts for 55% and 0.5~0.1mm accounts for 10%.
(5) heating rate by the regenerated granule material after classification in 10 DEG C/min is thermally dried, and is warming up to after 350 DEG C It is incubated 8h；
(6) weighing is first carried out according to the proportioning of following parts by weight：65 parts of regenerated granule material, 15 parts of thermosetting resin (the carbon containing trees of T60 5 parts of fat, 10 parts of phenolic resin), 8 parts of graphite, 12 parts of aluminum oxide regenerative micro powder, 10 parts of corundum powder, 5 parts of pitch, then added Material is kneaded, and charging sequence is：Regenerated granule material is first added, the thermosetting resin for accounting for thermosetting resin total amount 2/3 is added, then Graphite, aluminum oxide regenerative micro powder, remaining thermosetting resin that average grain diameter is 50 mesh are sequentially added, corundum powder is eventually adding And pitch, the batch mixing 20min under the conditions of 60 DEG C；
(7) mixture obtained by step (6) is subjected to high-pressure molding in 200Mpa, in 1200 DEG C~1500 DEG C of hyperthermia tunnel Kiln It is interior to be burnt till, 6h is incubated, obtains regenerating high-alumina brick after cooling.
Embodiment 2
(1) waste and old refractory brick is divided into magnesium carbonaceous, magnalium carbonaceous, four kinds of classifications of aluminium carbonaceous and aluminium silicon carbide carbonaceous；
(2) classified waste and old refractory brick in selection step (1), on the basis of reworked material gross mass, according to following component content Proportioning carries out dispensing：90% Al2O3, 3.5% SiO2, 4.5% MgO, 1.5% ZrO2, surplus is impurity, is obtained again Raw material；
(3) reworked material after iron removal by magnetic separation is crushed, obtains regenerated granule material, and magnetic separation is carried out to regenerated granule material and remove Iron；
(4) regenerated granule material is subjected to gradation, on the basis of regenerated granule material gross mass, obtained by after middle gradation again The grade and weight/mass percentage composition of raw particulate material be respectively：The particle that 5~3mm particle accounts for 30%, 3~1mm accounts for 45% and 0.5 ~0.1mm particle accounts for 25%.
(5) heating rate by the regenerated granule material after classification in 5 DEG C/min is thermally dried, and is warming up to after 350 DEG C It is incubated 5h；
(6) weighing is first carried out according to the proportioning of following parts by weight：65 parts of regenerated granule material, 15 parts of thermosetting resin (the carbon containing trees of T60 3 parts of fat, 12 parts of phenolic resin), 8 parts of graphite, 12 parts of aluminum oxide regenerative micro powder, 10 parts of corundum powder, 5 parts of pitch, then added Material is kneaded, and charging sequence is：Regenerated granule material is first added, the thermosetting resin for accounting for thermosetting resin total amount 2/3 is added, then Graphite, aluminum oxide regenerative micro powder, remaining organic siliconresin that average grain diameter is 100 mesh are sequentially added, schmigel is eventually adding Material and pitch, the batch mixing 30min under the conditions of 80 DEG C；
(7) mixture obtained by step (6) is subjected to high-pressure molding in 260Mpa, in 1200 DEG C~1500 DEG C of hyperthermia tunnel Kiln It is interior to be burnt till, 8h is incubated, obtains regenerating high-alumina brick after cooling.
Embodiment 3
(1) waste and old refractory brick is divided into magnesium carbonaceous, magnalium carbonaceous, four kinds of classifications of aluminium carbonaceous and aluminium silicon carbide carbonaceous；
(2) classified waste and old refractory brick in selection step (1), on the basis of reworked material gross mass, according to following component content Proportioning carries out dispensing：8,7% Al2O3, 2% SiO2, 3% MgO, 1% ZrO2, surplus is impurity, obtains reworked material；
(3) reworked material after iron removal by magnetic separation is crushed, obtains regenerated granule material, and magnetic separation is carried out to regenerated granule material and remove Iron；
(4) regenerated granule material is subjected to gradation, on the basis of regenerated granule material gross mass, obtained by after middle gradation again The grade and weight/mass percentage composition of raw particulate material be respectively：The particle that 5~3mm particle accounts for 25%, 3~1mm accounts for 52% and 0.5 ~0.1mm particle accounts for 23%.
(5) heating rate to the regenerated granule material after classification in 5 DEG C/min is thermally dried, and is warming up to after 350 DEG C It is incubated 5h；
(6) weighing is first carried out according to the proportioning of following parts by weight：65 parts of regenerated granule material, 15 parts of thermosetting resin (the carbon containing trees of T60 3.75 parts of fat, 11.25 parts of phenolic resin), 8 parts of graphite, 12 parts of aluminum oxide regenerative micro powder, 10 parts of corundum powder, 5 parts of pitch, then Charging kneading is carried out, charging sequence is：Regenerated granule material is first added, the thermosetting resin for accounting for thermosetting resin 2/3 is added, connects Graphite, aluminum oxide regenerative micro powder, the remaining thermosetting resin for sequentially adding that average grain diameter is 150 mesh, corundum is eventually adding Powder and pitch, the batch mixing 25min under the conditions of 70 DEG C；
(7) mixture obtained by step (6) is subjected to high-pressure molding in 230Mpa, in 1200 DEG C~1500 DEG C of hyperthermia tunnel Kiln It is interior to be burnt till, 8h is incubated, obtains regenerating high-alumina brick after cooling.
Comparative example
Using in the market high-alumina brick as a comparison case.
Performance detection is carried out to the present embodiment 1-3 and the regeneration high-alumina brick of comparative example：Each 3 pieces of sample preparation of embodiment difference, Vacuumized after 110 DEG C of drying to constant weights, detection bulk density and the porosity；Each 3 pieces of sample preparation of embodiment difference, at 110 DEG C Drying detects cold crushing strength to constant weight.Physical and chemical index testing result is as shown in table 1.
The physical and chemical index result of table 1.
The comparativeanalysis detected according to the regeneration high-alumina brick to the present embodiment 1-3 and comparative example, the present invention utilizes waste and old resistance to The physical and chemical index of the obtained regeneration high-alumina brick of firebrick is very excellent, has reached the index level of normal high-alumina brick, can be applied to The working lining of heating furnace, hot air duct and blast furnace residue channel, realizes the purpose turned waste into wealth.
The present invention is using waste and old refractory brick generation regeneration high-alumina brick, and technique is simple, it is possible to reduce to the wave of waste and old refractory brick Take；The recycling of waste and old refractory material is conducive to the regeneration of waste material and the raising of added value；Made with waste and old refractory brick Not only have the advantages that cost performance is high for the regeneration high-alumina brick that raw material is produced, and the recycling of waste resource can be realized, have Beneficial to environmental protection, with good economic benefit and social benefit.

Claims (6)

1. the resource recycle method of carbon containing waste and old refractory brick, it is characterised in that comprise the following steps：
(1) waste and old refractory brick is divided into magnesium carbonaceous, magnalium carbonaceous, four kinds of classifications of aluminium carbonaceous and aluminium silicon carbide carbonaceous；
(2) classified waste and old refractory brick in selection step (1), on the basis of reworked material gross mass, according to following component content Proportioning carries out dispensing：85%~90% Al2O3, 0.5%~3.5% SiO2, 1.5%~4.5% MgO, 0.5%~ 1.5% ZrO2, surplus is impurity, obtains reworked material；
(3) reworked material is crushed, obtains regenerated granule material, and iron removal by magnetic separation is carried out to regenerated granule material；
(4) regenerated granule material after iron removal by magnetic separation is subjected to gradation；
(5) regenerated granule material after classification is thermally dried；
(6) weighing is first carried out according to the proportioning of following parts by weight：65 parts of the regenerated granule material that step (5) is obtained, thermosetting resin 15 parts, 8 parts of graphite, 12 parts of aluminum oxide regenerative micro powder, 10 parts of corundum powder, 5 parts of pitch, then carry out charging kneading, charging sequence For：Regenerated granule material is first added, the thermosetting resin for accounting for thermosetting resin total amount 2/3 is added, graphite, oxygen is then sequentially added Change aluminium regenerative micro powder, remaining thermosetting resin, be eventually adding corundum powder and pitch, under the conditions of 60~80 DEG C batch mixing 20~ 30min；
(7) mixture obtained by step (6) is subjected to high-pressure molding, burnt in 1200 DEG C~1500 DEG C of hyperthermia tunnel Kiln Into 6~8h of insulation obtains regenerating high-alumina brick after cooling.
2. the resource recycle method of carbon containing waste and old refractory brick according to claim 1, it is characterised in that to regenerate particle Expect on the basis of gross mass, the grade and weight/mass percentage composition of the regenerated granule material of gained are respectively after gradation in step (4)： 5~3mm particle account for 25%~35%, 3~1mm particle account for 45%~55% and 0.5~0.1mm particle account for 10%~ 25%.
3. the resource recycle method of carbon containing waste and old refractory brick according to claim 1, it is characterised in that in step (5) The process conditions of heat drying are：5~10 DEG C/min of heating rate, is warming up to 5~8h of insulation after 350 DEG C.
4. the resource recycle method of carbon containing waste and old refractory brick according to claim 1, it is characterised in that the thermosetting Resin is that T60 contains carbon resin and phenolic resin, and mass ratioes of the T60 containing carbon resin and phenolic resin is 1：(2~4).
5. the resource recycle method of carbon containing waste and old refractory brick according to claim 1, it is characterised in that the graphite Particle diameter is 50~150 mesh.
6. according to the resource recycle method of any described carbon containing waste and old refractory brick of claim 1-5, it is characterised in that step (7) pressure limit of mesohigh shaping is 200~260Mpa.
CN201710386608.6A 2017-05-26 2017-05-26 The resource recycle method of carbon containing waste and old refractory brick Pending CN107162611A (en)

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CN109942306A (en) * 2019-03-28 2019-06-28 江苏悦展新型材料有限公司 A kind of method of Novel fireproof brick recycling and its reworked material application
CN111116182A (en) * 2020-01-08 2020-05-08 长沙湘宁耐火材料有限公司 Preparation method of refractory brick
CN112430105A (en) * 2020-10-30 2021-03-02 云南濮耐昆钢高温材料有限公司 Aluminum-magnesium-carbon brick prepared from regenerated tabular corundum and preparation method thereof

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CN108002818A (en) * 2017-11-30 2018-05-08 长兴科创科技咨询有限公司 The method of the recycling of waste and old refractory material
CN109942306A (en) * 2019-03-28 2019-06-28 江苏悦展新型材料有限公司 A kind of method of Novel fireproof brick recycling and its reworked material application
CN111116182A (en) * 2020-01-08 2020-05-08 长沙湘宁耐火材料有限公司 Preparation method of refractory brick
CN112430105A (en) * 2020-10-30 2021-03-02 云南濮耐昆钢高温材料有限公司 Aluminum-magnesium-carbon brick prepared from regenerated tabular corundum and preparation method thereof

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Application publication date: 20170915