CN109369199A - Utilize the method for waste magnesia carbon brick preparation continuous casting tundish dry vibration material - Google Patents
Utilize the method for waste magnesia carbon brick preparation continuous casting tundish dry vibration material Download PDFInfo
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- CN109369199A CN109369199A CN201811481767.5A CN201811481767A CN109369199A CN 109369199 A CN109369199 A CN 109369199A CN 201811481767 A CN201811481767 A CN 201811481767A CN 109369199 A CN109369199 A CN 109369199A
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- carbon brick
- magnesia carbon
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- waste magnesia
- vibration material
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention relates to waste magnesia carbon brick recycling fields, especially a kind of method effectively realized recycling waste magnesia carbon brick and prepare continuous casting tundish dry vibration material, include the following steps: a, first, in following ratio selection ingredient: 25~35.5 parts of medium-grade magnesite, 55~65 parts of waste magnesia carbon brick, 2.5-3.5 parts of low-temperature binder, 0.8-1.5 parts of medium temperature bonding agent, 0.5-0.9 parts of high temperature adhesives, 1-2.1 parts of oxygen additive are hindered, 1-1.2 parts of attached oxygen additive；B, above-mentioned ingredient is mixed through forced stirrer, mixed material c, is passed through into damp-prrof packing, the i.e. preparation of completion dry-type vibration material.The present invention has been successfully prepared continuous casting tundish dry vibration material.Continuous casting tundish dry vibration material is produced using this method, there is simple process, properties of product are stablized, the advantage of production cost can be effectively reduced, to realize the secondary use of waste and old resource, produce good social benefit, application prospect is very wide.Among using waste magnesia carbon brick preparation continuous casting tundish dry vibration material.
Description
Technical field
The present invention relates to waste magnesia carbon brick recycling field, it is dry that especially a kind of utilization waste magnesia carbon brick prepares continuous casting production
The method of formula vibration material.
Background technique
After the 1970s, steel steel-making enterprise is rapidly developed, its main feature is that process speed is fast, investment collection
In, technology is gradually improved.The tens million of tons of bring refractory consumption rate therewith, using finishing the waste and old refractory material of generation up to
4000000 tons or more, in the processing of waste and old refractory material, lag far behind the development speed of iron and steel enterprise.These waste and old refractory materials
It usually rises and is handled with Other Waste amalgamation, waste and old refractory material reuse ratio is low, and opposite segments processing mode is to bury
It is main.It is shown according to related document, domestic waste and old refractory material reuse ratio is 30% or so, and foreign department steel splitting factory waste refractory materials
Utilization rate is up to 80% or so.The so low reuse ratio of domestic waste refractory materials causes vast resources waste and environmental pollution,
Mineral resources are increasingly depleted and today of environmental pollution zero tolerance, this contradiction become increasingly conspicuous.
Aspect is recycled for waste magnesia carbon brick, waste magnesia carbon brick by selecting processing, is used further to compacting magnesium carbon by Some Enterprises
Brick, this method have been suitable only for sizing fireproof material production line enterprise；Also there are Some Enterprises using the carbon containing high feature of magnesia carbon brick, lead to
It crosses combustion system and obtains magnesian, in today that environmental requirement is stringent, this method is eliminated substantially；There are also Some Enterprises will
Waste magnesia carbon brick is processed into corresponding granularity, in terms of other refractory materials in bulk.Therefore, it there is no at present preferably to waste magnesia carbon brick
Utilization method.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of effectively realization recycling waste magnesia carbon brick and prepare among continuous casting
The method of packet dry-type vibration material.
The technical solution adopted by the present invention to solve the technical problems is: preparing continuous casting tundish dry using waste magnesia carbon brick
The method of vibration material, include the following steps: a, firstly, choosing ingredient in following ratio: 25~35.5 parts of medium-grade magnesite, give up magnesium carbon
It 55~65 parts of brick, 2.5-3.5 parts of low-temperature binder, 0.8-1.5 parts of medium temperature bonding agent, 0.5-0.9 parts of high temperature adhesives, hinders outside oxygen
Add 1-2.1 parts of agent, 1-1.2 parts of attached oxygen additive；B, above-mentioned ingredient is mixed through forced stirrer, c, leads to mixed material
Damp-prrof packing is crossed, i.e. the preparation of completion dry-type vibration material.
Further, content of MgO >=95.0% in the medium-grade magnesite.
Further, content of MgO >=63.0%, C content >=10.0% in the waste magnesia carbon brick.
Further, the waste magnesia carbon brick is the magnesia carbon brick for recycling steelmaking converter overhaul and changing.
Further, the particle size range of the waste magnesia carbon brick is 0-4mm.
The beneficial effects of the present invention are: the present invention takes full advantage of waste magnesia carbon brick, and continuous casting production has been successfully prepared it
Dry-type vibration material.Continuous casting tundish dry vibration material is produced using this method, there is simple process, properties of product are stablized, can be had
The advantage that effect reduces production cost produces good social benefit, before to realize the secondary use of waste and old resource
Scape is very wide.Among using waste magnesia carbon brick preparation continuous casting tundish dry vibration material.
Specific embodiment
Using the method for waste magnesia carbon brick preparation continuous casting tundish dry vibration material, include the following steps: a, firstly, by as follows
Ratio chooses ingredient: 25~35.5 parts of medium-grade magnesite, 55~65 parts of waste magnesia carbon brick, 2.5-3.5 parts of low-temperature binder, medium temperature combines
0.8-1.5 parts of agent, 0.5-0.9 parts of high temperature adhesives, 1-2.1 parts of oxygen additive are hindered, 1-1.2 parts of attached oxygen additive；It b, will be above-mentioned
Ingredient is mixed through forced stirrer, and mixed material c, is passed through damp-prrof packing, the i.e. preparation of completion dry-type vibration material.
For specific component, medium-grade magnesite is common magnesia, and waste magnesia carbon brick preferably recycles steel-making and turns
The magnesia carbon brick that furnace overhaul is changed recycles wherein the particle size range of the waste magnesia carbon brick is 0-4mm to preferably realize.
In addition, three kinds of bonding machines of basic, normal, high temperature of the invention ensure that the preparation of dry materials, and two kinds of additives effectively prevent magnesium carbon
Oxidation of coal in brick has preferable intensity in each temperature range.When reaching 1000-1100 DEG C using temperature, addition resistance
Oxygen additive generates one layer of compacted zone in refractory surface, prevents oxygen to refractory material internal penetration, protects useless magnesium carbon
Carbon in brick is not oxidized；The affinity of attached oxygen additive and oxygen is stronger than the affinity of carbon and oxygen, prior to carbon be oxidized to
Play the role of protecting carbon.Under the action of both additives, to make dry materials that there is preferable resistance to slag.By above-mentioned heavy
Amount number weighs raw material, is produced into steel-making continuous casting tundish dry vibratory material, can meet steel-making continuous casting tundish and continuously be poured 900
Minute or more.In order to further increase the quality of product, preferably: content of MgO >=95.0% in the medium-grade magnesite；It is preferred that described
Content of MgO >=63.0%, C content >=10.0% in waste magnesia carbon brick.To further improve the final quality of the product of acquisition.
Tundish dry material obtained through the invention is had cheap advantage, is greater than using normal temperature strength
The advantages that 5MPa, elevated temperature strength is good, toasts the packet that do not collapse, and middle packet turns over containing easily, do not pollute molten steel, the continuous placing time is up to 900 points
It is more than clock.
Embodiment
The present invention is main material production dry-type vibration material using waste magnesia carbon brick, preferable in order to obtain dry-type vibration material
Physicochemical property meets requirement.Five schemes of Preliminary design, various raw materials are by different quality number with addition of observing useless magnesium
The difference of carbon brick matches dosage, to dry materials physical property effect tendency.Bonding agent, additive are observed to addition, to homogeneity simultaneously
The performance measured than dry-type vibration material influences.Finally determine each material quality number.
In identical proportion bonding agent, different ratio waste magnesia carbon brick and the variation of medium-grade magnesite dry-type vibration material physics and chemistry
Situation, see Table 2 for details for proportion.
Table 2
Each design scheme is matched by designing quality with lab scale scale, each scheme is prepared 2 kilograms of samples, point
Be not blended 5 minutes with laboratory's mixer, the test agent that then will be blended, each scheme be put into 3 40mm ×
In the steel die of 40mm × 160mm, by vibration and external force extrusion forming, 250 DEG C of constant temperature are put into togerther together with steel die
In baking oven, taken out after being kept for 1.5 hours.Two samples difference Muffle furnace of each scheme is kept at 1100 DEG C and 1500 DEG C again
3 hours, intensity and the line variation of survey were shown in Table 3:
Under 3 different temperatures of table, the detection case of each scheme dry-type vibration material
Pass through experimental observation to phenomenon 1: when waste magnesia carbon brick mass fraction declines, intensity is in rising trend, and line variation is in subtract
Small trend, it can be seen that waste magnesia carbon brick mass fraction must be in certain zone of reasonableness.It is being designed in dry-type vibration material physicochemical property
When in range, the mass ratio of waste magnesia carbon brick is promoted as far as possible.Observe phenomenon 2: in 1100 DEG C × 3h, intensity is than 250 DEG C
Declined when × 1.5h, this Strength Changes, is easy the packet that collapses occur in use.And when 1500 DEG C × 3h, not up to product is wanted
Intensity is sought, elevated temperature strength is low, directly affects service life.Conclusion is that 2 preliminary project of table also needs to improve.
Analyze phenomenon 1: in the unchanged situation of bonding agent number, variable quantity only has waste magnesia carbon brick and middle-grade magnesium
Sand.Reduce again with waste magnesia carbon brick mass fraction, intensity just rises this trend analysis and thinks: waste magnesia carbon brick proportion, which rises, will affect
Dry vibration material intensity.The magnesia carbon brick processed is examined, discovery reason has three: 1. since magnesia carbon brick is to be pressed into
Type recycles reprocessing after use, there are part vacation particles, and false granule strength is low, affect the intensity of dry-type vibration material.2. processing
Waste magnesia carbon brick particle surface afterwards adheres to a small amount of fine powder, hinders the physical bond of bonding agent.3. the C in waste magnesia carbon brick is to knot
The compatibility of mixture is poor.
Analyze phenomenon 2: phenomenon is increased with waste magnesia carbon brick mass fraction, strength reduction.At high temperature, intensity becomes
Change more obvious.After having consulted magnesia carbon brick characteristic and production technology, according to the analysis, waste magnesia carbon brick is through broken processing
Afterwards, the anti-oxidation of coal agent original function for destroying magnesia carbon brick after being processed into corresponding granularity, increases waste magnesia carbon brick surface area, magnesium
Carbon in carbon brick has the chance of more contact oxygen.It is oxidized at high temperature, destroys the intensity of dry-type vibration material.
The problem of phenomenon 1 is found can not change, and can only be solved, be determined by controlling the addition mass fraction of waste magnesia carbon brick
In the case where guaranteeing dry-type vibration material quality condition, rational proportion waste magnesia carbon brick is added.The solution of phenomenon 2 is addition certain amount
Additive, the oxidation of coal in waste magnesia carbon brick is prevented, so that dry vibration material be made to obtain design high temperature intensity.Implement to conclude a case thus
Example 2.
Case 2: case optimization design proportion adjusts waste magnesia carbon brick mass ratio, determines addition range；Additive is introduced,
Oxidation of coal in waste magnesia carbon brick is prevented, the additive than different quality number is observed, its effect is observed, so that dry materials be made to be set
Intensity is counted, requirement is met.Proportion design is shown in Table 4 after optimization.
Table 4: each material quality ratio after optimization
Above-mentioned 5 schemes are made into 3 40mm × 40mm × 160mm sample respectively, in 250 DEG C of baking ovens, holding 1.5 is small
When after take out.The two of them sample of each scheme is placed in Muffle furnace again, keeps 3 small respectively in 1100 DEG C and 1500 DEG C
When, obtain 5 result of table.
Table 5: after antioxidant is added in 5 schemes, the Physico-chemical tests situation of each scheme dry-type vibration material
According to 5 Analysis of test results of table, controls waste magnesia carbon brick and be added in right amount, with addition of appropriate antioxidant, physicochemical property
Meet design requirement.The present inventor finally thinks: this kind of waste magnesia carbon brick comprehensive utilization technique method, it is determined that each material quality part
The following range of number: 25~35.5 parts of medium-grade magnesite, 55~65 parts of waste magnesia carbon brick, 2.5-3.5 parts of low-temperature binder, medium temperature bonding agent
0.8-1.5 parts, 0.5-0.9 parts of high temperature adhesives, 1-2.1 parts of oxygen additive are hindered, 1-1.2 parts of attached oxygen additive.
The continuous casting tundish dry vibration material produced by above-mentioned mass ratio.Simple process, properties of product are stablized, can effectively be dropped
Low production cost, can secondary use waste and old resource, generate good social benefit, there is preferable application prospect.
Claims (5)
1. utilizing the method for waste magnesia carbon brick preparation continuous casting tundish dry vibration material, which comprises the steps of:
A, firstly, in following ratio selection ingredient: 25~35.5 parts of medium-grade magnesite, 55~65 parts of waste magnesia carbon brick, low-temperature binder
2.5-3.5 parts, 0.8-1.5 parts of medium temperature bonding agent, 0.5-0.9 parts of high temperature adhesives, 1-2.1 parts of oxygen additive are hindered, attached oxygen is additional
1-1.2 parts of agent；
B, above-mentioned ingredient is mixed through forced stirrer,
C, mixed material is passed through into damp-prrof packing, the i.e. preparation of completion dry-type vibration material.
2. utilizing the method for waste magnesia carbon brick preparation continuous casting tundish dry vibration material as described in claim 1, it is characterised in that:
Content of MgO >=95.0% in the medium-grade magnesite.
3. as claimed in claim 1 or 2 using the method for waste magnesia carbon brick preparation continuous casting tundish dry vibration material, feature exists
In: content of MgO >=63.0%, C content >=10.0% in the waste magnesia carbon brick.
4. as claimed in claim 1 or 2 using the method for waste magnesia carbon brick preparation continuous casting tundish dry vibration material, feature exists
In: the waste magnesia carbon brick is the magnesia carbon brick for recycling steelmaking converter overhaul and changing.
5. utilizing the method for waste magnesia carbon brick preparation continuous casting tundish dry vibration material as claimed in claim 4, it is characterised in that:
The particle size range of the waste magnesia carbon brick is 0-4mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114180953A (en) * | 2021-12-01 | 2022-03-15 | 攀枝花钢城集团有限公司 | Method for synthesizing magnesia-alumina spinel from waste magnesium and aluminum-carbon bricks and magnesia-alumina spinel |
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| CN114180953A (en) * | 2021-12-01 | 2022-03-15 | 攀枝花钢城集团有限公司 | Method for synthesizing magnesia-alumina spinel from waste magnesium and aluminum-carbon bricks and magnesia-alumina spinel |
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Application publication date: 20190222 |