CN100467429C - Magnesium gunning refractory for copper smelting-furnace - Google Patents
Magnesium gunning refractory for copper smelting-furnace Download PDFInfo
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- CN100467429C CN100467429C CNB2007100547102A CN200710054710A CN100467429C CN 100467429 C CN100467429 C CN 100467429C CN B2007100547102 A CNB2007100547102 A CN B2007100547102A CN 200710054710 A CN200710054710 A CN 200710054710A CN 100467429 C CN100467429 C CN 100467429C
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Abstract
A magnesium gunning refractory used in copper smelting furnace can be used to gun and repair large area or partial erosive part of the furnace lining of nonferrous metals smelting furnace, the material thereof comprises aggregate, powder, binding agent and additive; the material of aggregate and powder comprises fused magnesite chrome sinter, fused magnesia, sintered magnesia and forsterite; the critical particle size of the aggregate is 0.1-5mm, and the particle size of the powder less than 0.088mm; the weight ratio is that fused magnesite chrome sinter 0-20%, sintered magnesia 10-30%, forsterite 0-20% for particle size of 3-5mm; sintered magnesia10-40%, forterite 10-40% for particle size of 1-3mm; fused magnesia 0-20%, sintered magnesia 5-20%, forsterite 5-20% for particle size of 0.1-1mm; fused magnesia 6-20%, forsterite 0-15% for particle size less than 0.088mm; binding agent 5%-15%; additive 6%-20%. The invention has the advantages of delaying the date of retirement, increasing the service life of the whole furnace lining, decreasing the repairing expenses and working intensity, and ensuring the continuity of production.
Description
Technical field
The present invention relates to metallurgical technology field, particularly a kind ofly be applicable to that the copper smelting-furnace to converter, reverberatory furnace class carries out the magnesium gunning refractory for copper smelting-furnace of hot patching.
Background technology
Present copper smelting converter liner generally adopts directly in conjunction with magnesia chrome brick, half recombined magnesia-chrome brick, and what the emission inner lining of furnace generally adopted is the high-quality magnesia brick.The former failure area concentrates on upper and lower material mouth and material impact zone, and the latter's failure area concentrates on fire door both sides and stalk.After this and position are damaged, the measure of adopting is blowing out at present, after cooling down, remove the refractory lining that has damaged, change new refractory lining, this has just caused the discontinuity of producing, and has influenced the work-ing life of other position liner, has increased energy consumption and workman's labor capacity simultaneously.
Summary of the invention
Purpose of the present invention provides a kind of kiln production gap that can utilize at existing weak point in the above-mentioned prior art just, gun-mix refractory---the magnesium gunning refractory for copper smelting-furnace of hot kiln being repaired in the mode of spray repair.
Copper smelting-furnace Gunning refractory of the present invention: erosion resistance is good, and bonding strength is big, and antiscour is wear-resistant.Realize by following technical measures:
The raw material of magnesium gunning refractory for copper smelting-furnace of the present invention is formed and is comprised aggregate, fine powder, wedding agent and additive; That raw material described in the invention has is high temperature resistant, anti-erosion, thermal conductivity is low, chemical stability good, can satisfy that the nonferrous metal melts fusing point is low, good fluidity, the extremely strong service requirements of perviousness; Wherein, the raw material of described aggregate and fine powder is formed and is comprised fused magnesia-chrome, electrosmelted magnesite clinker, magnesite clinker, forsterite; The critical granularity of aggregate is 0.1～5mm, the granularity＜0.088mm of fine powder; Its weight ratio is: particle is the fused magnesia-chrome 0～20% of 3～5mm, magnesite clinker 10～30%, forsterite 0～20%; Particle is the magnesite clinker 10～40% of 1～3mm, forsterite 10～40%; Particle is the electrosmelted magnesite clinker 0～20% of 0.1～1mm, magnesite clinker 5～20%, forsterite 5～20%; Granularity＜0.088mm electrosmelted magnesite clinker 6～20%, forsterite 0～15%; Wedding agent 5%～15%; Additive 6%～20%.
Wedding agent described in the invention: be the compound combination of gel and micro mist, but rapid reaction, rapidly hard solid, form colloid chromium complex salt of phosphoric acid structure, make Gunning refractory good fluidity, cohesiveness strong.The raw material of wedding agent described in the invention is formed and weight ratio is: Sodium hexametaphosphate 99 10～40%, tri-polyphosphate 1～10%, silicon powder 10～60%, secar-71 cement (pure calcium aluminate cement) 20～60%.
Additive described in the invention: have big, the active strong characteristics of specific surface, promote ion diffusion and sintering velocity to accelerate, make liquid phase occur forming ceramic combination in early days, realize sintering agent activated sintering process.The raw material of described additive is formed and weight ratio is: the caustic-calcined magnesite 30～50% of powder degree＜0.088mm, the talcum 0～30% of granularity＜0.088mm, the trichroite 0～40% of granularity＜0.088mm, the silicon carbide 10～30% of granularity＜0.088mm.
Aggregate described in the present invention adds electrofusion magnesia powder and fills pore based on electrosmelted magnesite clinker, magnesite clinker, forsterite in the matrix.The physical and chemical index of each raw material such as selected fused magnesia-chrome, electrosmelted magnesite clinker, magnesite clinker, caustic-calcined magnesite, trichroite, talcum, forsterite, silicon carbide is as shown in table 1 in aggregate and the fine powder:
Table 1 Gunning refractory raw material physical and chemical index
Be powder under Sodium hexametaphosphate 99 in the described wedding agent, tripoly phosphate sodium STPP, silicon powder and the secar-71 cement normal temperature, wherein the physical and chemical index of Sodium hexametaphosphate 99 is: proportion 2.484, Fe≤0.05%, total phosphate 〉=68.0%; The physical and chemical index of tri-polyphosphate is: total phosphate 〉=57.0%, Fe≤0.015%; The physical and chemical index of silicon powder is: SiO
2〉=97%; The physical and chemical index of secar-71 cement is: Al
2O
3〉=68% (weight), SiO
2≤ 1.0% (weight), Fe
2O
3≤ 0.4% (weight).
Gunning refractory physical and chemical index of the present invention all can reach shown in the table 2:
The physical and chemical index of table 2 Gunning refractory RYPB-1
Gunning refractory of the present invention is in refining subsidiary factory of Yunnan Copper Industry Co., Ltd. rig-site utilization, wherein the spray repair of 100 tons of reverberatory furnace side doors once can be used 10 stoves～14 stoves, average energy of 100 tons of upper and lower fire door spray repairs of converter uses 12 heats, and fire door 1～1.5 meter local spray repair inward once generally can be used 4～5 stoves under 100 tons of converters.
Magnesium gunning refractory for copper smelting-furnace of the present invention, be applied to converter that copper smelts and reverberatory furnace after, following advantage is arranged: delay the damage phase of smelting furnace, improve the monolithic lining life-span, reduce maintenance cost, reduce labor strength, guarantee the continuity of production.
Embodiment
The present invention is described in further detail below with reference to embodiment:
The raw material of magnesium gunning refractory for copper smelting-furnace of the present invention is formed and is comprised aggregate, fine powder, wedding agent and additive; The raw material of described aggregate and fine powder is formed and is comprised fused magnesia-chrome, electrosmelted magnesite clinker, magnesite clinker, forsterite; The critical granularity of aggregate is 0.1～5mm, the granularity＜0.088mm of fine powder; The raw material of wedding agent is formed and is comprised Sodium hexametaphosphate 99, tri-polyphosphate, silicon powder, secar-71 cement (pure calcium aluminate cement); The raw material of additive is formed the caustic-calcined magnesite of powder degree＜0.088mm, the talcum of granularity＜0.088mm, the trichroite of granularity＜0.088mm, the silicon carbide of granularity＜0.088mm.
Embodiment 1
The magnesium gunning refractory for copper smelting-furnace of present embodiment adopts following step to be prepared from:
A, at first, get by weight under normal temperature condition: particle is the fused magnesia-chrome 10% of 3～5mm, magnesite clinker 10%; Particle is the magnesite clinker 10% of 1～3mm, forsterite 15%; Particle is the magnesite clinker 15% of 0.1～1mm, forsterite 5%; Granularity＜0.088mm electrosmelted magnesite clinker 15%; Wedding agent 8%; Additive 12%; (wherein the raw material of wedding agent is formed and by weight ratio is: Sodium hexametaphosphate 99 20%, tri-polyphosphate 4%, silicon powder 30%, secar-71 cement (pure calcium aluminate cement) 46%; The raw material of described additive is formed and weight ratio is: the caustic-calcined magnesite 50% of powder degree＜0.088mm, the trichroite 25% of granularity＜0.088mm, the silicon carbide 25% of granularity＜0.088mm).
B, fine powder raw material, wedding agent, additive are carried out pre-mixing by the duplex V-Mixer, prepare and compound.
C, batch mixing adopt the edge mill of 750Kg level, and the order of addition(of ingredients) of batch mixing is: add particulate material earlier and stirred 5 minutes, add premix then and stirred 10 minutes; Total mixing time is 15～20 minutes, makes that each composition of Gunning refractory is even.
D, employing double-layer plastic woven bag packing, every bag of net weight 500 ± 5kg (or undertaken by the both sides of supply and demand agreement), with packaged product stock in the exsiccant storehouse, the neat stacking, and signs such as dated name of product, the trade mark, lot number, net weight, date manufactured, name of manufacturing factory.
Embodiment 2
The magnesium gunning refractory for copper smelting-furnace of present embodiment adopts following step to be prepared from:
A, at first, get by weight under normal temperature condition: particle is the magnesite clinker 15% of 3～5mm, particle is the magnesite clinker 15% of 1～3mm, forsterite 15%; Particle is the magnesite clinker 15% of 0.1～1mm, forsterite 5%; Granularity＜0.088mm electrosmelted magnesite clinker 15%; Wedding agent 5%; Additive 15%.(wherein the raw material of wedding agent is formed and by weight ratio is: Sodium hexametaphosphate 99 25%, tri-polyphosphate 2%, silicon powder 25%, secar-71 cement (pure calcium aluminate cement) 48%; The raw material of described additive is formed and weight ratio is: the caustic-calcined magnesite 50% of powder degree＜0.088mm, the talcum 20% of granularity＜0.088mm, the silicon carbide 30% of granularity＜0.088mm.
B, fine powder raw material, wedding agent, additive are carried out pre-mixing by the duplex V-Mixer, prepare and compound.
C, batch mixing adopt the edge mill of 750Kg level, and the order of addition(of ingredients) of batch mixing is: add particulate material earlier and stirred 5 minutes, add premix then and stirred 10 minutes; Total mixing time is 15～20 minutes, makes that each composition of Gunning refractory is even.
D, employing double-layer plastic woven bag packing, every bag of net weight 500 ± 5kg (or undertaken by the both sides of supply and demand agreement), with packaged product stock in the exsiccant storehouse, the neat stacking, and signs such as dated name of product, the trade mark, lot number, net weight, date manufactured, name of manufacturing factory.
Embodiment 3
The magnesium gunning refractory for copper smelting-furnace of present embodiment adopts following step to be prepared from:
A, at first, get by weight under normal temperature condition: particle is the magnesite clinker 10% of 3～5mm, forsterite 10%; Particle is the magnesite clinker 10% of 1～3mm, forsterite 15%; Particle is the electrosmelted magnesite clinker 10% of 0.1～1mm, magnesite clinker 5%, forsterite 15%; Granularity＜0.088mm electrosmelted magnesite clinker 6%, forsterite 4%; Wedding agent 5%%; Additive 10%.(wherein the raw material of wedding agent is formed and by weight ratio is: Sodium hexametaphosphate 99 15%, tri-polyphosphate 1%, silicon powder 30%, secar-71 cement (pure calcium aluminate cement) 54%; The raw material of described additive is formed and weight ratio is: the caustic-calcined magnesite 50% of powder degree＜0.088mm, the trichroite 35% of granularity＜0.088mm, the silicon carbide 15% of granularity＜0.088mm).
B, fine powder raw material, wedding agent, additive are carried out pre-mixing by the duplex V-Mixer, prepare and compound.
C, batch mixing adopt the edge mill of 750Kg level, and the order of addition(of ingredients) of batch mixing is: add particulate material earlier and stirred 5 minutes, add premix then and stirred 10 minutes; Total mixing time is 15～20 minutes, makes that each composition of Gunning refractory is even.
D, employing double-layer plastic woven bag packing, every bag of net weight 500 ± 5kg (or undertaken by the both sides of supply and demand agreement), with packaged product stock in the exsiccant storehouse, the neat stacking, and signs such as dated name of product, the trade mark, lot number, net weight, date manufactured, name of manufacturing factory.
Claims (1)
1, a kind of magnesium gunning refractory for copper smelting-furnace is characterized in that: the raw material of this magnesian gunning refractory is formed and is comprised aggregate, fine powder, wedding agent and additive; The raw material of described aggregate and fine powder is formed and is comprised fused magnesia-chrome, electrosmelted magnesite clinker, magnesite clinker, forsterite; The critical granularity of aggregate is 0.1～5mm, the granularity＜0.088mm of fine powder; Its weight percent is: particle is the fused magnesia-chrome 0～20% of 3～5mm, magnesite clinker 10～30%, forsterite 0～20%; Particle is the magnesite clinker 10～40% of 1～3mm, forsterite 10～40%; Particle is the electrosmelted magnesite clinker 0～20% of 0.1～1mm, magnesite clinker 5～20%, forsterite 5～20%; Granularity＜0.088mm electrosmelted magnesite clinker 6～20%, forsterite 0～15%; Wedding agent 5%～15%; Additive 6%～20%; The raw material of described wedding agent is formed and weight percent is: Sodium hexametaphosphate 99 10～40%; Tri-polyphosphate 1～10%; Silicon powder 10～60%; Secar-71 cement 20～60%; The raw material of described additive is formed and weight percent is: the caustic-calcined magnesite 30～50% of granularity＜0.088mm, the talcum 0～30% of granularity＜0.088mm, the trichroite 0～40% of granularity＜0.088mm, the silicon carbide 10～30% of granularity＜0.088mm.
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| CNB2007100547102A CN100467429C (en) | 2007-06-30 | 2007-06-30 | Magnesium gunning refractory for copper smelting-furnace |
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| CN100467429C true CN100467429C (en) | 2009-03-11 |
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