CN101955360B - Blast-furnace high-alumina press-in material and application thereof - Google Patents
Blast-furnace high-alumina press-in material and application thereof Download PDFInfo
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Abstract
The invention discloses a blast-furnace high-alumina press-in material and application thereof. The press-in material comprises a powder material and a bonding agent, wherein the bonding agent accounts for 35-38 percent of the total mass of the blast-furnace high-alumina press-in material, and the rest is the powder material; the bonding agent comprises the following components according to the mass percentage of each component accounting for the bonding agent: 50-65 percent of phenolic resin, 33-48 percent of furan resin and 1-2 percent of glycol; the powder material comprises the following components according to the mass percentage of each component accounting for the powder material: 68-73 percent of sintered mullite as aggregate particles, 18-21 percent of anti-oxidation graphite as a matrix material, 7-11 percent of silicon carbide as the other matrix material and 0.2-0.6 percent of acid substance as a hardener; and the physical proportions of the powder material are as follows: the proportion of the particles to the total matrix materials is 2.0-3.0:1, and the proportion of the coarse particles to the fine particles in the particles is 1.2-1.6:1. The blast-furnace high-alumina press-in material is mainly used for blast-furnace maintenance, and the press-in ratio of the liquid press-in material obtained after mixing is more than 90 percent.
Description
Technical field
The present invention relates to a kind of blast furnace high aluminium and be pressed into material, this blast furnace high aluminium is pressed into material and is mainly used in the blast furnace maintenance.
Background technology
Blast furnace lining is pressed into maintenance technique and is of long duration.Traditional maintenance that is pressed into generally selects for use the cement bond material of water system to be pressed into.The low-viscosity material of this high-moisture is pressed in the State of Blast Furnace; Stick to the furnace wall to be pressed into the sclerosis of material construction body slow, be 4-5 hour at the setting time of 150 degree, be prone to after the high-content moisture evaporation produce and burst phenomenon; Also fragile original refractory lining; And because it is high to be pressed into material construction body void content, intensity is low, thereby the life-span is shorter.
After improved aluminium carbonaceous is pressed into material, adopt single resin-bonded, because parameters of construction technology and equipment and the restriction that is pressed into aspects such as material formula, cause being pressed into material and blast furnace lining body bonding strength is not high, work-ing life is not high yet.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of blast furnace high aluminium to be pressed into material, make blast furnace high aluminium be pressed into material and have good construction performance and use properties, thereby reach the purpose that prolongs blast furnace campaign.Blast furnace high aluminium is pressed into material and adopts the resin compounded wedding agent, and wedding agent is selected and allotment, and its powder formulation adopts reasonable grit grading, and the liquid state that is obtained is pressed into the rate of material more than 90%.Under the situation of not blowing out of blast furnace, utilize the regular damping down chance of blast furnace, outside State of Blast Furnace, realize maintenance to blast furnace lining.
The present invention realizes that through following technical scheme this blast furnace high aluminium is pressed into material and comprises powder and wedding agent, and wherein wedding agent accounts for the 35%-38% that blast furnace high aluminium is pressed into material total mass per-cent, and all the other are powder;
Described wedding agent is the compound resin wedding agent; Be resol and furane resin; For the viscosity that makes wedding agent meets product application requirement of the present invention, also to comprise terepthaloyl moietie as additive, this three component respectively accounts for the wedding agent mass percent and is respectively: resol 50-65%; Furane resin 33-48%, terepthaloyl moietie 1-2%;
Said powder is by each ingredients constitute powder total mass per-cent; Comprise following component: adopt fused mullite as aggregate (being particulate material) 68-73%; Adopt anti-oxidant graphite as matrix material 18-21%; Adopt silit as another kind of matrix material 7-11%, adopt acid as stiffening agent 0.2-0.6%;
The physics proportioning of this powder, wherein particulate material is 2.0-3.0 with the ratio of total matrix material: 1, coarse particles and fine grain ratio are 1.2-1.6 in the particulate material: 1.
Said stiffening agent may be selected to be Hydrocerol A, boric acid or tartrate.
Said product technical process: the 1. at first preparation of powder: in mixing facilities, adding fused mullite aggregate, anti-oxidant graphite-based material, silicon carbide-based material, and then add stiffening agent, is under 5-25 ℃ the condition mixing 5-8 minute in temperature.2. the then preparation of resin compounded wedding agent: utilize coating-4 viscosity meter to measure the viscosity of two kinds of resins, add an amount of additive, adjust the viscosity of the wedding agent after compound, make its time of passing through coating-4 viscosity meter about 2-3 minute according to the viscosity number of measuring.3. last, the above powder for preparing and combined binder mixed can obtain liquid blast furnace high aluminium and be pressed into material.
Through the last furnace shell damage mechanism of anti-material the and State of Blast Furnace being pressed into the principle analysis of furnace retaining outward; It is aggregate that blast furnace high aluminium of the present invention is pressed into material employing hardness fused mullite high, that wear resistance is good; Can bear the mechanical wear of decline furnace charge and rising coal gas stream, burn the back compressive strength at 12.2～16.2MPa.Adopt anti-oxidant graphite as the matrix material, can strengthen the resistance of oxidation that blast furnace high aluminium is pressed into material.As the matrix material, help improving the intensity that blast furnace high aluminium is pressed into material with silit, its compressive strength is 12.2～16.2MPa, and folding strength is 4.1～4.8MPa.The acid stiffening agent that adopts makes and is pressed into the requirement that material satisfies construction; Guarantee that blast furnace high aluminium is pressed into the rational setting time of material; Setting time was controlled at about 1.5 hours, guaranteed that it has enough engineering times, can guarantee to be pressed into the smooth construction of material; Can guarantee again its be pressed into back expansion and within a certain period of time rapidly and interliner together, play the maintenance effect that liner reproduces.Said compound resin wedding agent be used to be in harmonious proportion blast furnace high aluminium be pressed into the material powder be pressed into material to obtain liquid blast furnace high aluminium.The resin compounded wedding agent that adopts; Make to be pressed into and expect to have good viscosity and flowability; Degree of mobilization is 175～182mm, and its viscosity has guaranteed to be pressed into carrying out smoothly of construction, and guarantees that it has good binding property with blast furnace lining in being pressed into blast furnace; Thereby guarantee to be pressed into effect, the rate of being pressed into reaches more than 90%.The resol that in wedding agent, adds 50-65% because its higher efficiency of carbon conversion utilizes the use properties under its high temperature, thereby improves maintenance effect.Wedding agent after resol and furane resin are compound at ambient temperature, is guaranteed about 2-3 minute with the coating-4 viscosity meter time of recording, thereby guarantees the stable of wedding agent quality.
For guaranteeing that blast furnace high aluminium is pressed into material and has a good physicochemical performance, the present invention is by dense packing granulometric composition principle design prescription: according to the Andreassen Equation Theory:
CPET/100＝(D/D
L)
q
D----grain graininess (size)
D
L-maximum particle size
The following cumulative percentage of a certain grade of CPET-(D)
Q-----size-grade distribution coefficient
With the q value and the D that configure
LValue substitution equation draws each grade proportion of particles in the prescription.In prescription, selecting the particulate material and the ratio of total matrix material is 2.0-3.0: 1; Coarse particles and fine grain ratio are 1.2-1.6 in the particulate material: 1 (coarse particles refers to (3-1) mm; Fine particle refers to (1-0) mm), can guarantee like this to fill and tight each other between particle, reach maximum tap density.
Blast furnace high aluminium is pressed into material and is different from traditional material that is pressed into, mainly show high firmness, good flowability, pumping and with body good binding property.High firmness is meant and is pressed into refractory materials viscosity that maintenance the uses viscosity greater than common material.Good flowability is meant through the compound furane resin of resol, adds additive again, makes material have good mobility having under the full-bodied situation, is beneficial to construction.Be meant through the selection of main raw material and the adding of inhibitor with the bonding strength height of body, make material after being pressed into, can overcome oxidation, peel off, thus the bonding strength of raising and blast furnace lining body.
Blast furnace high aluminium is pressed into the maintenance that material is mainly used in blast furnace lining, and the major cause that furnace lining damages in blast furnace has: the impact of machinery, the effect of alkali oxide compound, the effect of Zn and ZnO, the effect of water vapour, the corrosive effect of the slag of thermal shocking, molten iron and corrosion etc.Therefore, blast furnace high aluminium is pressed into material and except the performance with general fire-resistant refractory materials, also should has following characteristic:
(1) good oxidation-resistance;
(2) good flowability and pumping;
(3) good antistripping property, alkali-resistivity;
(4) with the good cohesive strength of liner.
Blast furnace high aluminium of the present invention is pressed into the application of material as fire proof material of furnace lining, promptly selects the weak part perforate of blast furnace in using, perforate the stove skin rubescent around or top; Burn-oning compresses short tube, with pipeline tapping be pressed into machine and join together, the liquid blast furnace high aluminium that utilizes the high pressure of the machine that is pressed into to prepare is pressed into material and is pressed into; This material is expanded at inner lining surface, under temperature action, rapidly and the body of furnace shell iron sheet, liner etc. be bonded to one; Form the new liner that reproduces, stop up the convection channel of furnace gas, thicken fire proof material of furnace lining; Through regular pressed repairing, can keep stable lining thickness, prolong blast furnace campaign.
Embodiment
Below be that embodiments of the invention are elaborated: present embodiment provided detailed embodiment, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
The present invention is raw materials used to see table 1:
Table 1 blast furnace high aluminium is pressed into material used powder component situation and merchandise resources
The used detection method of the present invention is seen table 2:
The pairing detection method of physical and chemical index that table 2 is different
Embodiment 1
(1) fused mullite of adding 68KG in mixing facilities, the anti-oxidant graphite of 20.8KG, the silit of 11KG, the stiffening agent Hydrocerol A of adding 0.2KG.
(2) be under 5 ℃ the condition mixing 5 minutes in temperature, preparation of powder is accomplished.
(3) in container, add resol 50KG, furane resin 49KG, additive terepthaloyl moietie 1KG, mixing its time of utilizing coating-4 viscosity meter to record of back is 2 minutes.Wedding agent is ready to complete.
(4) with the resin compounded wedding agent that adds 38KG in the powder that mixes, be under 5 ℃ the condition mixing 5 minutes in temperature, measure its horse summer value at 21+2.
(5) blast furnace high aluminium of liquid state being pressed into material, to be cast in mould total, and it is flat to shake.
(6) be 5 ℃ in temperature, humidity is maintenance 24h under 60% the condition, produces intensity to pour mass.
In the present embodiment, selecting the ratio of particulate material and matrix material is 2.125: 1, wherein in the particulate material coarse particles account for fine particle fraction be 1.25: 1, the powder particle that mixes is filled and tight each other; Add resin compounded wedding agent 38KG again, this consumption reaches lubricated granules and the free-pouring purpose of ability.So not only convenient construction can also guarantee its intensity.
In this instance, blast furnace high aluminium is pressed into material and has certain degree of mobilization (175mm), and burning back compressive strength (12.2MPa) and folding strength (4.1MPa) preferably preferably can satisfy the needs that steel mill uses.
Embodiment 2
(1) fused mullite of adding 73KG in mixing facilities, the anti-oxidant graphite of 18KG, the silit of 8.4KG, the stiffening agent boric acid of adding 0.6KG.
(2) be that mixing 5 minutes preparation of powder are accomplished under 25 ℃ the condition in temperature.
(3) add resol 65KG, furane resin 33KG, additive terepthaloyl moietie 2KG, mix the back its to utilize the coating-4 viscosity meter time of recording be 3 minutes.Wedding agent is ready to complete.
(4) with the resin compounded wedding agent that adds 35KG in the powder that mixes, be under 25 ℃ the condition mixing 5 minutes in temperature, measure its horse summer value at 21+2.
(5) blast furnace high aluminium of liquid state is pressed into material and is cast in the mould, it is flat to shake.
(6) be 25 ℃ in temperature, humidity is maintenance 24h under the condition of 60KG, produces intensity to pour mass.
In the present embodiment, selecting the ratio of particulate material and matrix is 2.7: 1, and wherein coarse particles and fine grain ratio are 1.5: 1.The powder particle that mixes is filled and tight each other.Add resin compounded wedding agent 35KG, this wedding agent consumption reaches lubricated granules and the free-pouring purpose of ability, and so not only convenient construction can also guarantee its intensity.
In the present embodiment, blast furnace high aluminium is pressed into material has certain fluidity (178mm), and burning back compressive strength (12.6MPa) and folding strength (4.5MPa) preferably preferably can satisfy steel mill and use needs.
Embodiment 3
(1) fused mullite of adding 71.6KG in mixing facilities, the anti-oxidant graphite of 21KG, the silit of 7KG, the stiffening agent tartrate of adding 0.4KG.
(2) be under 15 ℃ the condition mixing 5 minutes in temperature, preparation of powder is accomplished.
(3) add resol 57KG, furane resin 41.5KG adds additive terepthaloyl moietie 1.5KG, mix the back its to utilize the coating-4 viscosity meter time of recording be 2.5 minutes, wedding agent is ready to complete.
(4), under the condition of 15 ℃ of temperature mixing 5 minutes, measure its horse summer value at 21+2 with adding 36.5KG resin compounded wedding agent in the powder that mixes.
(5) blast furnace high aluminium of liquid state is pressed into material and is cast in the mould, it is flat to shake.
(6) be 25 ℃ in temperature, humidity is maintenance 24h under the condition of 60KG, produces intensity to pour mass.
In the present embodiment; Selecting the ratio of particulate material and matrix is 2.52: 1, and wherein coarse particles and fine grain ratio are 1.4: 1 in the particulate material, and the powder particle that mixes is filled and tight each other; Add resin compounded wedding agent 36.5KG; This wedding agent consumption reaches lubricated granules and the free-pouring purpose of ability, and so not only convenient construction can also guarantee its intensity.
In the present embodiment, blast furnace high aluminium is pressed into material has certain fluidity (182mm), and burning back compressive strength (16.2MPa) and folding strength (4.8MPa) preferably preferably can satisfy steel mill and use needs.
More than the blast furnace high aluminium of each embodiment preparation be pressed into the material product and detect through the Shanghai Baoye Construction Co., Ltd center and see table 3:
The blast furnace high aluminium of table 3 embodiment 1～3 gained is pressed into the physical and chemical index of material
Can see that from table 3 each item physical and chemical index that blast furnace high aluminium of the present invention is pressed into material all can meet or exceed standard value.
Claims (3)
1. a blast furnace high aluminium is pressed into material, it is characterized in that, comprises powder and wedding agent, and wherein wedding agent accounts for the 35%-38% that blast furnace high aluminium is pressed into material total mass per-cent, and all the other are powder;
Said wedding agent comprises resol 50-65%, furane resin 33-48%, terepthaloyl moietie 1-2% by each ingredients constitute wedding agent mass percent;
Said powder is by each ingredients constitute powder total mass per-cent; Comprise following component: adopt fused mullite as particles of aggregates material 68-73%; Adopt anti-oxidant graphite as matrix material 18-21%; Adopt silit as another kind of matrix material 7-11%, adopt acid as stiffening agent 0.2-0.6%;
The physics proportioning of this powder, wherein particulate material is 2.0-3.0 with the ratio of total matrix material: 1, coarse particles and fine grain ratio are 1.2-1.6 in the particulate material: 1, said coarse particles 3-1mm, said fine particle 1-0mm.
2. the described blast furnace high aluminium of claim 1 is pressed into material, it is characterized in that, said stiffening agent is Hydrocerol A, boric acid or tartrate.
3. be pressed into the application of material like the arbitrary said blast furnace high aluminium of claim 1 to 2 as fire proof material of furnace lining.
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| CN102417941A (en) * | 2011-11-14 | 2012-04-18 | 山西太钢不锈钢股份有限公司 | Maintenance method and system of blast furnace stack |
| CN108727002B (en) * | 2018-06-28 | 2021-06-08 | 中冶武汉冶金建筑研究院有限公司 | Plugging press-in material for air leakage of bottom foundation of hot blast stove |
| CN109608214A (en) * | 2019-01-31 | 2019-04-12 | 中冶武汉冶金建筑研究院有限公司 | A kind of non-cement slurry |
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Patent Citations (4)
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| CN1160030A (en) * | 1997-02-27 | 1997-09-24 | 宝山钢铁(集团)公司 | Self-flow hot patching material and producing method thereof |
| CN1232806A (en) * | 1999-05-28 | 1999-10-27 | 冶金工业部钢铁研究总院 | Fire clay for building blast furnace |
| CN1654431A (en) * | 2005-01-13 | 2005-08-17 | 武汉钢铁(集团)公司 | Fireproof materials for pressed repairing and method for preparing same |
| CN101580401A (en) * | 2009-06-18 | 2009-11-18 | 安徽宁火新材料有限公司 | High-strength wearable casting material |
Non-Patent Citations (1)
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| 赵永安等.新型高炉陶瓷杯用碳复合砖的研制与应用.《炼铁》.2008,第27卷(第4期),第53-55页. * |
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