CN104326753B - A kind of composite silicon-magnesium refractory brick and preparation method thereof - Google Patents
A kind of composite silicon-magnesium refractory brick and preparation method thereof Download PDFInfo
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- CN104326753B CN104326753B CN201410453562.1A CN201410453562A CN104326753B CN 104326753 B CN104326753 B CN 104326753B CN 201410453562 A CN201410453562 A CN 201410453562A CN 104326753 B CN104326753 B CN 104326753B
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- lime glass
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention provides a kind of composite silicon-magnesium refractory brick, be made up of following raw material: high-quality magnesium ore, electric smelting soda-lime glass, tackiness agent.The present invention provides a kind of preparation method of composite silicon-magnesium refractory brick simultaneously, and step is as follows: (1) pulverizes discarded soda-lime glass; (2) pickling; (3) soak, washing, dry; (4) electric smelting; (5) pulverize high-quality magnesium ore, stir together with electric smelting soda-lime glass, tackiness agent; (6) compression moulding; (7) roasting; (8) shaping, dry, selection, inspection, packaging warehouse-in.The refractory brick intensity adopting the present invention to manufacture is large, and temperature tolerance is strong, and have good high temperature anti-slag, with low cost, technique is simple.
Description
Technical field
The present invention relates to technical field of refractory materials, particularly relate to a kind of composite silicon-magnesium refractory brick and preparation method thereof
Background technology
Refractory materials is generally divided into two kinds, i.e. amorphous refractory and sizing refractory materials.Sizing refractory materials refers generally to refractory brick, and its shape has standard rule, also can build as required when cutting and process temporarily.Refractory brick is called for short firebrick, is fired into coal clay or other refractory raw materials, and faint yellow or band brown, be mainly used in building smelting furnace, ability 1,580 DEG C-1, the high temperature of 770 DEG C, has the refractory materials of definite shape and size.Magnesia fire-protecting wall, referring to and make raw material with magnesite, take periclasite as principal crystalline phase, the refractory brick of content of MgO more than 80% ~ 85%.Magnesia fire-protecting wall is topmost goods in basic firebrick, and refractoriness is high, has good resistivity to basic slag and scum, is a kind of important high refractory brick.Be mainly used in open hearth, oxygen coverter, electric furnace and smelting non-ferrous metal etc.Calcium oxide and silicon-dioxide, as the raw material of magnesia fire-protecting wall, effectively can improve load softening point, make up the problem that magnesia fire-protecting wall is not alkaline-resisting, can be used for steel-making side-blown converter eye of wind place, open hearth furnace roof and the first-class place of oxygen converter.
Glass works has a large amount of glass wastes to produce every day, and according to more American-European developed country statistics, cullet amount accounts for 4 ~ 8% of municipal wastes total amount.The cullet rate of recovery of China approximately only has about 13 ~ 15%, and a large amount of cullet does not also obtain effective Collection and utilization.Correctly in refractory materials sintering procedure add the disperse that glass cullet can reduce HF and CO, increase the intensity of brick and the erosion of resistant.
Chinese patent CN103030408A discloses a kind of production method of Silicon carbide magnesite brick, produces using local resources silicon carbide and magnesium oxide as starting material, save cost, but be not suitable with most of area, and product refractory temperature is not high.Chinese patent CN100372808C discloses a kind of manufacture method of zirconium-containing magnesia brick, and product chemistry good stability, fusing point is high, but cost is very high, and requires quite high to zirconic disintegrating process.Chinese patent CN101274854B discloses magnesia brick that a kind of fire-resistant, carbon combines and preparation method thereof, and the physicals of its magnesia brick is fine, but the requirement for raw material and the requirement for technique are very high.Chinese patent CN102795870B discloses a kind of Light-weight magnesia brick and preparation method thereof, and the volume density of its magnesia brick is less, and thermal conductivity is low, moderate strength, and alkali-resistivity scouring ability is strong, but raw materials cost is high, and pulverize precision and reach micron order, processing requirement is higher.Chinese patent CN102557389A discloses a kind of method reclaiming useless quartz crucible high purity fused quartz, comprise the steps such as broken classification, pickling impurity removal, washing oven dry and amorphisation, realize the recycle of quartz sand, but the use face of quartz crucible is narrow, steel-making industry can not be widely used in.
Summary of the invention
High in order to solve high-strength magnesium refractory brick cost, the problem of complex process, we have proposed a kind of composite silicon-magnesium refractory brick and preparation method thereof, adopts the present invention can improve intensity and the high-temperature stability of magnesia fire-protecting wall, can also reduce costs.
The present invention is achieved by the following technical solutions:
For achieving the above object, the invention provides a kind of composite silicon-magnesium refractory brick, be made up of the raw material of following weight part: high-quality magnesium ore 84 ~ 93 parts, electric smelting soda-lime glass 5 ~ 11 parts, 2 ~ 5 parts, tackiness agent.Micron order glass cullet can reduce the disperse of HF and CO, increase the intensity of brick and the erosion of resistant.
Preferably, in above-mentioned high-quality magnesium ore, content of magnesia is 95 ~ 99%.Due to region characteristic, in the raw material of gained magnesium ore deposit, content of magnesia is higher, can reduce impurity interference, improve magnesia brick purity, ensures good hot strength and the load softening point of product.
Preferably, above-mentioned tackiness agent is one or both in lignosulfonic acid sodium solution and silicon sol.Sodium lignosulfonate has good diffusion, and its aqueous solution is brown to black, has colloid property, and the viscosity of solution raises with the increase of concentration.In large gauge Wall or floor tile and refractory brick manufacturing processed, blank raw material particulate secure bond can be made, dry body strength can be made to improve more than 20%-60%.Silicon sol belongs to colloidal solution, odorless, nontoxic, and particle is trickle, has stronger seepage force to basic unit, inner to basic unit by capillary penetration, makes coating have stronger cohesive force.
Preferably, in above-mentioned tackiness agent, the content of sodium lignosulfonate is 13 ~ 30%.
The present invention provides a kind of preparation method of composite silicon-magnesium refractory brick simultaneously, and step is as follows:
(1) discarded soda-lime glass is ground into the powder of 0.01 ~ 1mm, the control of particle volume effectively can improve the purity of recycling material.
(2) use the mixing acid of 1 ~ 25% weight ratio to carry out pickling to particle, the weight ratio of powder and mixing acid is 1:1 ~ 5, and pickling time is 4 ~ 200 hours, and pickling effectively can remove the impurity on particle surface, and mixing acid recyclable after again utilize.
(3) take out the powder after pickling, be soaked in water, washing is to neutral, again particle is dried to weight in wet base ratio and be less than 3%, when particle washing is complete, first can dries in outdoor to weight in wet base ratio and be less than 10%, then dry, can energy consumption be reduced, cost-saving.
(4) powder after oven dry is sent into electric arc furnace and carry out electric smelting, obtain electric smelting soda-lime glass;
(5) high-quality magnesium ore being ground into granularity is 1 ~ 50mm, sends into batching stirred pot together with electric smelting soda-lime glass, tackiness agent, and normal temperature and pressure stirs 15 ~ 60 minutes;
(6) pressure sending into brick press mould inherence 1 ~ 4T/cm2 makes type;
(7) send in tunnel furnace, in reducing atmosphere, 1450 ~ 1750 degrees Celsius of lower roastings 2.5 ~ 10 hours;
(8) shaping, dry, selection, inspection, packaging warehouse-in.
Preferably, above-mentioned electric smelting soda-lime glass particle is less than 100 μm.The soda-lime glass powder of micronization, can start solid state sintering reaction occurs at lesser temps, and generate original position miniaturization Spinel, make refractory brick have good middle hot strength and slag resistance.
Preferably, above-mentioned discarded soda-lime glass is the inferior unacceptable product of life rejected glass and/or soda-lime glass manufacturing enterprise.Discarded life rejected glass and defect ware price very cheap, greatly can reduce production cost, the raising market competitiveness.
Preferably, above-mentioned mixing acid is oxalic acid and hydrochloric acid, and its weight ratio is 1:1 ~ 5.
Compared with prior art, beneficial effect of the present invention is: refractory brick intensity is large, and temperature tolerance is strong, and have good high temperature anti-slag, with low cost, technique is simple.
Embodiment
Below in conjunction with embodiment, further illustrate content of the present invention.Should be appreciated that enforcement of the present invention is not limited to the following examples, any pro forma accommodation make the present invention or change all fall into scope; And the method in following embodiment, if no special instructions, be the ordinary method of this area.
Embodiment 1:
A kind of composite silicon-magnesium refractory brick, is made up of the raw material of following weight part: high-quality magnesium ore 92 parts, electric smelting soda-lime glass 5 parts, 3 parts, tackiness agent.Production stage is as follows:
(1) discarded soda-lime glass is ground into the powder of 0.01 ~ 1mm;
(2) use the mixing acid of 15% weight ratio to carry out pickling to particle, the weight ratio of powder and mixing acid is 1:3, and pickling time is 25 hours;
(3) take out the powder after pickling, be soaked in water, particle oven dry to neutral, then is less than 3% to weight in wet base ratio by washing;
(4) powder after oven dry is sent into electric arc furnace and carry out electric smelting, obtain electric smelting soda-lime glass;
(5) high-quality magnesium ore being ground into granularity is 1 ~ 50mm, and send into batching stirred pot together with electric smelting soda-lime glass, tackiness agent, normal temperature and pressure stirs 45 minutes;
(6) pressure sending into the inherent 2T/cm2 of brick press mould makes type;
(7) send in tunnel furnace, in reducing atmosphere, 1650 degrees Celsius of lower roastings 8 hours;
(8) shaping, dry, selection, inspection, packaging warehouse-in.
(9) random sampling 10 parts, carry out high-temperature behavior test, result is as shown in table 1.
Embodiment 2:
A kind of composite silicon-magnesium refractory brick, is made up of the raw material of following weight part: high-quality magnesium ore 89 parts, electric smelting soda-lime glass 8 parts, 3 parts, tackiness agent.
Production stage is substantially the same manner as Example 1.After completing, high-temperature behavior test is carried out in random sampling 10 parts, and result is as shown in table 1.
Embodiment 3:
A kind of composite silicon-magnesium refractory brick, is made up of the raw material of following weight part: high-quality magnesium ore 86 parts, electric smelting soda-lime glass 11 parts, 3 parts, tackiness agent.
Production stage is substantially the same manner as Example 1.After completing, high-temperature behavior test is carried out in random sampling 10 parts, and result is as shown in table 1.
Comparative example:
Commercial common magnesia fire-protecting wall, high-temperature behavior test is carried out in random sampling 10 parts, and result is as shown in table 1.
Table 1:
| Density g/cm 3 | Refractoriness (DEG C) | Load softening point (DEG C) | |
| Embodiment 1 | 2.67 | 1791±8 | 1814±10 |
| Embodiment 2 | 2.62 | 1807±11 | 1822±9 |
| Embodiment 3 | 2.58 | 1833±9 | 1851±10 |
| Comparative example | 2.43 | 1711±13 | 1729±13 |
As seen from Table 1, use the composite silicon-magnesium refractory brick of manufacture of the present invention to have obvious high-temperature behavior advantage compared with commercial common magnesia fire-protecting wall, and found by long-term production, raw materials cost can reduce by 5 ~ 10%.
Claims (7)
1. a composite silicon-magnesium refractory brick, is characterized in that, is made up of the raw material of following weight part: high-quality magnesium ore 84 ~ 93 parts, electric smelting soda-lime glass 5 ~ 11 parts, 2 ~ 5 parts, tackiness agent;
The preparation method of described composite silicon-magnesium refractory brick, step is as follows:
(1) discarded soda-lime glass is ground into the powder of 0.01 ~ 1mm;
(2) use the mixing acid of 1 ~ 25% weight ratio to carry out pickling to particle, the weight ratio of powder and mixing acid is 1:1 ~ 5, acid
The time of washing is 4 ~ 200 hours;
(3) take out the powder after pickling, be soaked in water, particle oven dry to neutral, then is less than 3% to weight in wet base ratio by washing;
(4) powder after oven dry is sent into electric arc furnace and carry out electric smelting, obtain electric smelting soda-lime glass;
(5) high-quality magnesium ore being ground into granularity is 1 ~ 50mm, and sending into together with electric smelting soda-lime glass, tackiness agent prepares burden stirs
Tank, normal temperature and pressure stirs 15 ~ 60 minutes;
(6) brick press mould inherence 1 ~ 4T/cm is sent into
2pressure make type;
(7) send in tunnel furnace, in reducing atmosphere, 1450 ~ 1750 degrees Celsius of lower roastings 2.5 ~ 10 hours;
(8) shaping, dry, selection, inspection, packaging warehouse-in.
2. a kind of composite silicon-magnesium refractory brick as claimed in claim 1, is characterized in that, in described high-quality magnesium ore, content of magnesia is 95 ~ 99%.
3. a kind of composite silicon-magnesium refractory brick as claimed in claim 1, is characterized in that, described tackiness agent is one or both in lignosulfonic acid sodium solution and silicon sol.
4. a kind of composite silicon-magnesium refractory brick as claimed in claim 3, is characterized in that, in described tackiness agent, the content of sodium lignosulfonate is 13 ~ 30%.
5. a kind of composite silicon-magnesium refractory brick as claimed in claim 1, is characterized in that, described electric smelting soda-lime glass particle is less than 100 μm.
6. a kind of composite silicon-magnesium refractory brick as claimed in claim 1, is characterized in that, described discarded soda-lime glass is the inferior unacceptable product of life rejected glass and/or soda-lime glass manufacturing enterprise.
7. a kind of composite silicon-magnesium refractory brick as claimed in claim 1, is characterized in that, described mixing acid is oxalic acid and hydrochloric acid, and its weight ratio is 1:1 ~ 5.
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| CN201410453562.1A CN104326753B (en) | 2014-09-09 | 2014-09-09 | A kind of composite silicon-magnesium refractory brick and preparation method thereof |
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| CN201410453562.1A CN104326753B (en) | 2014-09-09 | 2014-09-09 | A kind of composite silicon-magnesium refractory brick and preparation method thereof |
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| CN104326753B true CN104326753B (en) | 2016-01-20 |
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