KR20090095294A - Refractories for industrial iron and steel - Google Patents

Refractories for industrial iron and steel Download PDF

Info

Publication number
KR20090095294A
KR20090095294A KR1020080020558A KR20080020558A KR20090095294A KR 20090095294 A KR20090095294 A KR 20090095294A KR 1020080020558 A KR1020080020558 A KR 1020080020558A KR 20080020558 A KR20080020558 A KR 20080020558A KR 20090095294 A KR20090095294 A KR 20090095294A
Authority
KR
South Korea
Prior art keywords
steel industry
refractory
weight
refractory composition
composition
Prior art date
Application number
KR1020080020558A
Other languages
Korean (ko)
Other versions
KR100936163B1 (en
Inventor
이동석
Original Assignee
조선내화 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 조선내화 주식회사 filed Critical 조선내화 주식회사
Priority to KR1020080020558A priority Critical patent/KR100936163B1/en
Publication of KR20090095294A publication Critical patent/KR20090095294A/en
Application granted granted Critical
Publication of KR100936163B1 publication Critical patent/KR100936163B1/en

Links

Classifications

    • 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
    • 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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/40—Surface-active agents, dispersants
    • C04B2103/402—Surface-active agents, dispersants anionic
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/40—Surface-active agents, dispersants
    • C04B2103/408—Dispersants
    • 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
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • 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
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • 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
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
    • 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
    • C04B2235/38—Non-oxide ceramic constituents or additives

Abstract

Provided is a refractory composition for an iron industry using a water-soluble cationic/anionic curing agent. A refractory composition for an iron industry is composed of 3-20wt% of calcined alumina, 10-20wt% of disthene, 0.2-3.0wt% of fire-clay, 0.5-3.0wt% of sodium silicofluoride, 10-20wt% of silica sol dispersed in water, 0.3-2.0wt% of curing agent and common ingredients for refractories. The disthene comprises 45-65wt% of Al2O3 and 30-50wt% of SiO2, which have particle sizes of 0.5mm or less. The sodium silicofluoride includes 95% or more of Na2SiF6 and has the particle sizes of 0.075mm or less.

Description

철강 산업용 내화 조성물{refractories for industrial iron and steel}Refractories for industrial iron and steel}

본 발명은 제철소에서 철광석을 용융하여 쇳물을 제조하는 용광로(Blast Funace)와 유동환원로(Fluid Layer Reduction Funace), 전기로 등의 제철 및 제강시 사용되는 로(爐)의 벽체, 탕도(Runner), 용융철, 용강을 담고 처리할 때 사용되는 턴디쉬와 레들 (Ladle), 열연 및 후판을 가열하는 가열로, 소둔로의 벽체 및 천정, 혼선차 벽체 등 철강산업용 내화 조성물에 관한 것이다.The present invention relates to a wall and a runway of a furnace used in steelmaking and steelmaking, such as a blast furnace (Flast Funace), a fluid layer reduction furnace (Fluid Reduction Funace), an electric furnace for melting iron ore in an ironworks. The present invention relates to a fire-resistant composition for the steel industry, such as a furnace for heating tundish, ladle, hot rolled steel and thick plates, molten iron, molten steel, and hot-rolled and thick plates.

상기 조성과 관련한 국내 등록특허공보 97-009990(마그네코/메트렐 인코포레이티드)(이하"선기슬"이라 함)에서는 소성점토, 갈색 용융, 판상알루미늄 또한 그 혼합물중에서 선택된 내화성물질 60∼70중량%. 실리콘카바이트 10∼20중량%, 7∼15중량%의 실리카로 만든 실리카졸(결합제) 4∼8중량%, 흑연 5∼10중량%로 조성된 부분 보수용 건(Gunning)조성물로 알려져 있다   Regarding the composition, Korean Patent Publication No. 97-009990 (Magneco / Metrell Incorporated) (hereinafter referred to as “sun chain”) is a refractory material 60-70 selected from calcined clay, brown molten, plate aluminum, and mixtures thereof. weight%. It is known as a partially repairing gunning composition composed of 4 to 8% by weight of silica sol (binder) made of 10 to 20% by weight of silicon carbide, 7 to 15% by weight of silica, and 5 to 10% by weight of graphite.

그러나 상기한 선기술과 같이 실리콘카바이트 및 흑연을 함유하여 용강 속의 슬래그(Slag) 화학적 반응을 억제한 조성물은 실리카졸을 혼합하여 철피 및 기본 내화물의 보수재로 사용되어지는 조성물의 부착성에 있어서 혼합물과 경화제와의 접촉시 급격한 폐하(pH)에 의한 급결 또는 결합이 늦어지므로써 시공 품질 저하가 발생할 수 있고, 특히 사용장소가 산화분위기인 사용처에서는 실리콘카바이트의 산화로 조직파괴 및 슬래그에 의한 화학적 침식이 증가할 수 있으며, 특히 고로 및 용융환원로(파이넥스 용광로)와 같은 사용장소에서는 원형 철구조물 구조체를 형성하므로 구조적 용적 안정성이 중요하여 열간사용시 과소결 및 실리콘카바이트의 산화로 열간 수축하는 문제점이 있다.However, as described above, the composition containing silicon carbide and graphite to suppress slag chemical reaction in molten steel is mixed with silica sol in the adhesion of the composition to be used as a repair material for shell and base refractory materials. In case of contact with, rapid quenching or cohesion may be delayed due to rapid deterioration (pH), which may lead to deterioration of construction quality. In particular, in the use place such as blast furnace and melting reduction furnace (Finex furnace), since the structure of the circular iron structure is formed, structural volumetric stability is important, and there is a problem of hot shrinkage due to oversintering and oxidation of silicon carbide during hot use.

본 발명은 상기한 종래의 문제점을 개선하기 위한 것으로, 실리카졸을 규불화소다를 포함한 내화조성물에 적정량 혼합하여 실리카졸 경화에 필요한 폐하(pH)를 조절하고, 황산마그네슘 , 황산알루미늄, 중탄산나트륨, 탄산나트륨, 수산화칼슘, 수산화마그네슘 등의 양, 음이온계 경화제 수용액을 이용한 실리카졸의 건 부착을 유도하고, 남정석을 포함하여 열간 팽창 유도로 고부착성, 고강도, 내마노성과 용적 안정성이 우수한 시공체를 만드는데 적합한 철강산업용 내화조성물을 제공하고자 하는데 그 목적이 있다. The present invention is to improve the above-mentioned conventional problems, by mixing a suitable amount of silica sol in a refractory composition including soda fluoride to adjust the waste (pH) required for curing the silica sol, magnesium sulfate, aluminum sulfate, sodium bicarbonate, Induces adhesion of silica sol using the amount of sodium carbonate, calcium hydroxide, magnesium hydroxide, and an aqueous solution of anionic curing agent, and induces thermal expansion, including citrine, to make a high-adhesion, high-strength, abrasion resistance and volume stability The aim is to provide a fire resistant composition suitable for the steel industry.

상기한 목적을 달성하기 위한 본 발명은 100중량%로서, 하소알루미나 3∼20중량%, 남정석 10∼20중량%, 내화점토 0.2∼3.0중량%, 규불화소다 0.5∼3.0중량%, 물에 분산된 콜로이달 실리카졸 10∼20중량%, 경화제 0.3∼2.0중량%이고 나머지가 일반 내화성 원료로 조성됨을 특징으로 하는 철강산업용 내화조성물로 이루어진다. The present invention for achieving the above object is 100% by weight, 3-20% by weight of calcined alumina, 10-20% by weight of citrine, 0.2-3.0% by weight of refractory clay, 0.5-3.0% by weight of sodium silicate, dispersed in water 10-20% by weight of the colloidal silica sol, 0.3-2.0% by weight of the curing agent, and the remainder is composed of a fire-resistant composition for the steel industry, characterized in that it is composed of a general refractory raw material.

상기한 조성에서 하소알루미나는 Al2O3 99% 이상 이고, 평균입경이 0.5∼1.5㎛ 로 이루어짐이 바람직하고, 내화점토는 Al2O3 20∼30%, SiO2 50∼60% 이고, 평균입경이 0.045㎛ 이하로서 94∼99% 이루어짐이 바람직하다.In the above composition, the calcined alumina is at least 99% of Al 2 O 3 , and the average particle diameter is preferably 0.5 to 1.5 μm, and the refractory clay is 20 to 30% of Al 2 O 3 and 50 to 60% of SiO 2 , and the average It is preferable that a particle diameter is made into 94 to 99% as 0.045 micrometer or less.

남정석은 Al2O3 50∼60%, SiO2 35∼45%이고, -0.075㎛ 이하 평균입경을 갖는 원료로서 1300∼1450℃ 온도구간에서 뮬라이트와 실리카로 전이하여 10∼18% 영구 체적팽창하여 열간 용적 안정성을 향상시켜주는 것으로 10중량% 미만 첨가시는 필요한 체적 팽창을 얻을 수 없고, 20중량% 초과시는 과다팽창에 의한 구조체 균열(Crack)발생 및 박리가 발생하므로 10∼20중량% 사용함이 적합하다.Cryolite is 50-60% of Al 2 O 3 , 35-45% of SiO 2 , and has an average particle diameter of -0.075㎛ or less and transitions to mullite and silica at a temperature range of 1300-1450 ℃, and has a permanent volume expansion of 10-18%. It is to improve the hot volume stability, and when it is added less than 10% by weight, necessary volume expansion cannot be obtained, and when it exceeds 20% by weight, structure cracking and peeling are caused due to overexpansion, so it is 10 ~ 20% by weight. Suitable.

규불화소다는 Na2SiF6 성분이 95% 이상의 화합물로 비중 2.68, 폐하(pH) 3-4, 원료속에 포함된 Na2O 성분이 실리카졸과 함께 사용시 pH를 변화시켜 졸과의 반응을 유도하며 부착성을 향상시킨다. Sodium silicate is 95% or more of Na 2 SiF 6 components, specific gravity 2.68, waste (pH) 3-4, Na 2 O components in the raw material when used with silica sol to change the pH to induce reaction with sol And improves adhesion.

그 사용량이 3.0중량% 초과시는 pH 변화가 커 급결지연으로 인한 부착성을 저하시키며, 용선 및 슬라그 성분에 대한 화학적 내구성이 저하되며, 0.5중량% 미만시는 상기 효능이 발휘되지 못하므로 0.5∼3.0중량% 사용함이 적합하다. 또한 -0.075mm이하의 입자크기를 갖는 원료를 사용함이 적절하다.When the amount of use exceeds 3.0% by weight, the pH change is large, thereby decreasing the adhesion due to the delay of fastening, and the chemical durability of the molten iron and the slag component is lowered, and when the amount is less than 0.5% by weight, the above effects are not exhibited. It is suitable to use 3.0% by weight. It is also appropriate to use a raw material having a particle size of -0.075 mm or less.

본 발명은 실리카졸을 사용하여 경화시키는 것으로 입자크기가 1∼100㎚인 콜로이드성 실리카 입자가 물에 5∼60% 분산되어 있고 음이온계 계면활성제 0.1∼1.0%, 분산제 0.5∼0.7%, pH 9.4∼9.6인 실리카졸을 10∼20중량% 조성시킨다.According to the present invention, a colloidal silica particle having a particle size of 1 to 100 nm is dispersed in water with 5 to 60% of anionic surfactant, 0.1 to 1.0%, 0.5 to 0.7% of a dispersant, and pH 9.4. 10-20 weight% of silica sol which is -9.6 is formed.

상기 실리카졸에 첨가되는 분산제는 수산화나트륨, 수산화칼륨, 암모니아아민계열, 산화나트륨, 수산화니튬 중 적어도 1종 이상으로 이루어진다.The dispersant added to the silica sol comprises at least one of sodium hydroxide, potassium hydroxide, ammonia amine series, sodium oxide, and lithium hydroxide.

경화제는 습식 혼련물의 숏크리닝에 의한 건(Gunning) 시공이 가능하도록 하기 위한 경화 급결제로서 실리카졸을 바인더로 혼련할 경우 급경화 현상을 나타낼 수 있는 황산마그네슘, 황산알루미늄, 중탄산나트륨, 수산화칼슘, 수산화마그네슘 등의 양, 음이온계 경화제 수용액으로 이루어진다.Curing agent is a curing fastener to enable gunning construction by shot cleaning of wet kneaded material. Magnesium sulfate, aluminum sulfate, sodium bicarbonate, calcium hydroxide, and hydroxide may exhibit rapid hardening when kneading silica sol into a binder. It consists of quantity, such as magnesium, and aqueous solution of anionic hardening | curing agent.

상기 경화제를 사용함에 있어 그 사용량이 2.0중량% 초과시는 경화제에 포함되어 있는 알카리 성분으로 인해 용선이나 슬래그에 대한 화학적 내구성 및 열간강도가 저하되고, 0.3중량% 미만시는 상기 효능을 기대할 수 없으므로 0.3∼2.0중량% 사용함이 적절하다.In the use of the curing agent when the amount of use exceeds 2.0% by weight of the alkali component contained in the curing agent due to the chemical durability and hot strength to the molten iron or slag is lowered, when less than 0.3% by weight can not expect the above efficacy 0.3 It is appropriate to use -2.0% by weight.

일반 내화성원료는 여러 종류를 들 수 있으나, 그 예로서 뮬라이트, 카오린샤모트, 보오크사이트, 용융알루미나, 소결알루미나 중 적어도 1종 이상을 포함한다 General refractory raw materials may be of various kinds, for example, at least one of mullite, kaolin chamotte, bauxite, molten alumina, sintered alumina.

이상에서와 같이 본 발명은 실리카졸을 규불화소다와 남정석을 포함한 조성물을 적정량 혼합하여 실리카졸 경화에 필요한 pH를 조절하고, 양, 음이온계 경화제 수용액(황산마그네슘, 황산알루미늄, 중탄산나트륨, 탄산나트륨, 수산화칼슘, 수산화마그네슘 등)을 이용하여 실리카졸의 건(Gunning)부착 유도로 열간팽창을 유도하여 고부착성, 고강도, 내마모성 및 용적 안정성이 우수한 시공체를 만드는 철강산업용 내화물을 얻게 된다.As described above, the present invention adjusts the pH required for curing the silica sol by mixing a proper amount of silica sol with a composition containing sodium silicate and citrate, and an aqueous solution of anionic curing agent (magnesium sulfate, aluminum sulfate, sodium bicarbonate, sodium carbonate, Using calcium hydroxide, magnesium hydroxide, etc.), inducing hot expansion of silica sol induces thermal expansion, thereby obtaining a refractory for the steel industry, which makes a construction having excellent adhesion, high strength, wear resistance, and volume stability.

다음은 실시예에 따라 설명한다.The following is described according to the embodiment.

비교예Comparative example 실시예Example 1One 22 1One 22 33 뮬라이트10mm이하Mullite 10mm or less 7777 6464 7777 7777 7777 하소알루미나 1.0㎛Calcined Alumina 1.0㎛ -- 99 8.38.3 7.97.9 7.37.3 소결알루미나 0.5㎛Sintered Alumina 0.5㎛ 55 -- -- -- -- 내화점토 Fireclay 22 22 0.70.7 0.70.7 0.70.7 탄화규소3mm 이하 Silicon carbide less than 3mm 16.516.5 -- -- -- 남정석 0.5mm이하 Less than 0.5mm -- -- 1313 1313 1313 규불화소다 0.075mm이하 Sodium Fluoride 0.075mm or less -- -- 1.01.0 1.41.4 2.02.0 알루미나시멘트 Alumina cement 1313 -- 마이크로실리카 Microsilica 33 -- 폭력방지제 Anti-violence +0.03+0.03 -- 혼련결합제 Kneading Binder 수분(%)moisture(%) +11+11 -- 실리카졸43%Silica sol 43% -- 88 +15+15 +15+15 +15+15 경화제(%)Hardener (%) +0.2+0.2 0.50.5 +0.5+0.5 +0.5+0.5 +0.5+0.5 압송능력(최대길이,m)Feeding capacity (maximum length, m) 50이상50 or more 20이내Within 20 50이상50 or more 50이상50 or more 50이상50 or more 1400℃잔존 선변화율(%)Residual line change rate (%) at 1400 ℃ -1.0-1.0 -0.8-0.8 +0.5+0.5 +0.45+0.45 +0.5+0.5 압축강도(kg/cm2) Compressive strength (kg / cm 2 ) 1000℃*3hrs1000 ℃ * 3hrs 150150 550550 810810 856856 908908 1200℃*3hrs1200 ℃ * 3hrs 350350 781781 10731073 11201120 11701170 1400℃3hrs1400 ℃ 3hrs 620620 842842 12711271 12701270 13011301 열간강도(kg/cm2) 1200℃*1hrsHot strength (kg / cm 2 ) 1200 ℃ * 1hrs 1818 3535 5050 5050 5050 용적 침식지수(회전 용탕침식기)Volume Erosion Index (Rotary Melt Evaporator) 100100 9090 9090 9090 9090 마모성지수Wear index 100100 8080 8080 7878 7575

실시예Example 44 55 66 뮬라이트Mullite 7777 7373 69.169.1 하소알루미나 1.0㎛Calcined Alumina 1.0㎛ 8.58.5 7.97.9 1515 소결알루미나 0.5mm이하Sintered Alumina Less Than 0.5mm -- -- -- 내화점토Fireclay 0.70.7 0.70.7 1.51.5 탄화규소3mm이하Silicon carbide less than 3mm -- -- -- 남정석 0.5mm이하Less than 0.5mm 1313 1717 1313 규불화소다 0.075mm이하Sodium Fluoride 0.075mm or less -- 1.41.4 1.41.4 알루미나 시멘트Alumina cement -- -- -- 마이크로실리카Microsilica -- -- -- 폭렬방지제Explosives -- -- -- 혼련결합제 Kneading Binder 수분(%)moisture(%) -- -- -- 실리카졸43%Silica sol 43% 1515 1515 1515 경화제(%)Hardener (%) 0.50.5 0.50.5 0.50.5 압송능력(최대길이,m)Feeding capacity (maximum length, m) 50이상50 or more 50이상50 or more 50이상50 or more 1400℃ 잔존 선변화율(%)1400 ℃ remaining linear change rate (%) +0.35+0.35 +1.0+1.0 +0.68+0.68 압축강도(kg/cm)  Compressive strength (kg / cm) 1000℃*3hrs1000 ℃ * 3hrs 610610 815815 865865 1200℃*3hrs1200 ℃ * 3hrs 785785 11251125 11421142 1400℃*3hrs1400 ℃ * 3hrs 10111011 10081008 12151215 열간강도(kg/cm2)1200*1hrsHot strength (kg / cm2) 1200 * 1hrs 5353 5050 5858 용적 침식지수(회전 용탕침식기)Volume Erosion Index (Rotary Melt Evaporator) 8585 9595 8080 마모지수Wear index 8585 8585 8080

상기 실시예 1,2,3의 결과로 나온 조성물은 규불화소다의 사용량 증가시 저온영역에서 고온영역에 까지 용적안정성이 있으며, 강도가 증가함을 알 수 있다.The resulting composition of Examples 1, 2, and 3 has volumetric stability from low temperature region to high temperature region when the amount of sodium fluoride is increased, and it can be seen that the strength is increased.

실시예 4는 규불화소다를 제외시킨 예로서 용선 및 슬라그와의 화학적 침식지수는 감소하고, 열간강도는 증가하였으나, 각 온도영역에서 강도가 감소하고 마모성 지수가 증가하여 내마모성이 요구되는 장소 사용은 바람직하지 않다. Example 4 excludes sodium fluoride, and the chemical erosion index with molten iron and slag is reduced and the hot strength is increased, but the strength is decreased and the wear index is increased in each temperature range. Is not preferred.

실시예 5는 남정석의 사용량을 17중량% 사용한 것으로 좀더 큰 열간 팽창성이 요구되어 지는 장소에 사용함이 바람직하다. In Example 5, the amount of cyanite used is 17% by weight, and it is preferable to use it in a place where a greater hot expandability is required.

실시예 6은 하소알루미나 함량을 증량한 결과로 용선 침식지수 및 마모성 지수가 감소하므로 내용선 및 내 슬라그성이 필요한 부위에 시공함이 적합하다.In Example 6, since the molten iron erosion index and the abrasion index are reduced as a result of increasing the calcined alumina content, it is suitable to be installed in the area where the content line and slag resistance are required.

Claims (9)

100중량%로서, 하소알루미나 3∼20중량%, 남정석 10∼20중량%, 내화점토 0.2∼3.0중량%, 규불화소다 0.5∼3.0중량%, 물에 분산된 실리카졸 10∼20중량%, 경화제 0.3∼2.0중량%이고 나머지가 일반 내화성 원료로 조성됨을 특징으로 하는 철강산업용 내화조성물100 wt%, 3-20 wt% calcined alumina, 10-20 wt% cyanite, 0.2-3.0 wt% refractory clay, 0.5-3.0 wt% sodium silicate, 10-20 wt% silica sol dispersed in water, curing agent Refractory composition for the steel industry, characterized in that 0.3 to 2.0% by weight, the remainder is composed of a general refractory raw material 제 1항에 있어서,The method of claim 1, 남정석이 Al2O3 45∼65중량%, SiO2 30∼50중량%이고, -0.5mm이하의 입자크기를 갖는 것임을 특징으로 하는 철강산업용 내화조성물Cyanite is a fire-resistant composition for the steel industry, characterized in that 45% to 65% by weight of Al 2 O 3, 30 to 50% by weight of SiO 2 , and has a particle size of less than -0.5mm 제 1항에 있어서,The method of claim 1, 규불화소다가 Na2SiF6 성분이 95% 이상이고, -0.075mm 이하의 입자크기를 갖는 것임을 특징으로 하는 철강산업용 내화조성물Sodium silicate refractory composition for the steel industry, characterized in that the Na 2 SiF 6 component is more than 95%, and has a particle size of less than -0.075mm 제 1항에 있어서,The method of claim 1, 내화점토가 Al2O3 15∼35중량%, SiO2 45∼55중량%이고, -0.075mm이하의 입자크기를 갖는 것임을 특징으로 하는 철강산업용 내화조성물Refractory composition for the steel industry, characterized in that the refractory clay is 15 to 35% by weight of Al 2 O 3 , 45 to 55% by weight of SiO 2 and has a particle size of -0.075 mm or less. 제 1항에 있어서,The method of claim 1, 일반 내화원료가 뮬라이트, 카오린샤모트, 보오크사이트, 용융알루미나, 소결알루미나 중 적어도 1종 이상임을 특징으로 하는 철강산업용 내화조성물Refractory composition for the steel industry, characterized in that the general refractory material is at least one of mullite, kaolin chamot, bauxite, molten alumina, sintered alumina. 제 1항에 있어서,The method of claim 1, 실리카졸은 1∼100㎚인 콜로이드성 실리카 입자가 물에 5∼50% 분산되어 있고, 음이온계 계면활성제가 0.1∼1.0%, 분산제가 0.5∼0.7 이고, 폐하(pH)가 9.4∼9.6로 이루어진 것임을 특징으로 하는 철강산업용 내화조성물In the silica sol, colloidal silica particles having a particle size of 1 to 100 nm are dispersed in water at 5 to 50%, anionic surfactant is 0.1 to 1.0%, dispersant is 0.5 to 0.7, and macular pH (pH) is 9.4 to 9.6. Refractory composition for the steel industry, characterized in that 제 6항에 있어서,The method of claim 6, 상기 계면활성제가 아크릴산계 또는 설폰산계열로 이루어짐을 특징으로 하는 철강산업용 내화조성물Refractory composition for the steel industry, characterized in that the surfactant consists of acrylic acid or sulfonic acid series 제 6항에 있어서,The method of claim 6, 상기 분산제가 수산화나트륨, 수산화칼륨, 산화나트륨, 암모니아아민계열, 수산화니튬 중 적어도 1종 이상으로 이루어짐을 특징으로 하는 철강산업용 내화조성물Refractory composition for the steel industry, characterized in that the dispersant is composed of at least one of sodium hydroxide, potassium hydroxide, sodium oxide, ammonia amine series, lithium hydroxide. 제 1항에 있어서,The method of claim 1, 상기 경화제가 황산마그네슘, 황산알루미늄, 중탄산나트륨, 수산화칼슘, 수 산화마그네슘 등의 양, 음이온계 경화제 수용액 중 적어도 1종 이상으로 이루어짐을 특징으로 하는 철강산업용 내화조성물Refractory composition for the steel industry, characterized in that the curing agent is composed of at least one of an amount of magnesium sulfate, aluminum sulfate, sodium bicarbonate, calcium hydroxide, magnesium hydroxide, and an aqueous solution of anionic curing agent.
KR1020080020558A 2008-03-05 2008-03-05 Refractories for industrial iron and steel KR100936163B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080020558A KR100936163B1 (en) 2008-03-05 2008-03-05 Refractories for industrial iron and steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080020558A KR100936163B1 (en) 2008-03-05 2008-03-05 Refractories for industrial iron and steel

Publications (2)

Publication Number Publication Date
KR20090095294A true KR20090095294A (en) 2009-09-09
KR100936163B1 KR100936163B1 (en) 2010-01-12

Family

ID=41295614

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080020558A KR100936163B1 (en) 2008-03-05 2008-03-05 Refractories for industrial iron and steel

Country Status (1)

Country Link
KR (1) KR100936163B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105801144A (en) * 2016-04-12 2016-07-27 安徽马钢耐火材料有限公司 High-quality high-aluminum runner brick as well as preparation method and application thereof
KR20180023630A (en) * 2016-08-26 2018-03-07 한국중부발전(주) Combustion chamber inner lining component of gas turbine and methode thereof
CN108863410A (en) * 2018-06-19 2018-11-23 佘春霞 A kind of high-performance silicon powder gel combination cement-free castable
CN112010662A (en) * 2020-09-07 2020-12-01 郑州四季火耐火材料有限公司 High-temperature refractory mortar and preparation method thereof
CN115925430A (en) * 2022-11-28 2023-04-07 上海宝九和耐火材料有限公司 Wear-resistant plastic ramming mass and application thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998648A (en) 1975-09-08 1976-12-21 Dresser Industries, Inc. Monolithic refractories
US4292084A (en) 1978-07-07 1981-09-29 Dresser Industries, Inc. Vibratable plastic refractory
KR100708414B1 (en) 2005-10-20 2007-04-18 조선내화 주식회사 Refractories for manufacture iron and steel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105801144A (en) * 2016-04-12 2016-07-27 安徽马钢耐火材料有限公司 High-quality high-aluminum runner brick as well as preparation method and application thereof
KR20180023630A (en) * 2016-08-26 2018-03-07 한국중부발전(주) Combustion chamber inner lining component of gas turbine and methode thereof
CN108863410A (en) * 2018-06-19 2018-11-23 佘春霞 A kind of high-performance silicon powder gel combination cement-free castable
CN112010662A (en) * 2020-09-07 2020-12-01 郑州四季火耐火材料有限公司 High-temperature refractory mortar and preparation method thereof
CN115925430A (en) * 2022-11-28 2023-04-07 上海宝九和耐火材料有限公司 Wear-resistant plastic ramming mass and application thereof
CN115925430B (en) * 2022-11-28 2023-12-29 上海宝九和耐火材料有限公司 Wear-resistant plastic ramming mass and application thereof

Also Published As

Publication number Publication date
KR100936163B1 (en) 2010-01-12

Similar Documents

Publication Publication Date Title
US8505336B2 (en) AZS refractory composition
CN101921128B (en) Pouring material for lime rotary kiln
CN101891485A (en) Pouring material for steel ladle
KR20080112113A (en) Refractory composition for glass melting furnaces
CN108033795B (en) High-aluminum castable for permanent layer of torpedo ladle
CN108821785A (en) A kind of coating against binding slags for hot-rolling heating furnace water beam heat preservation lining
KR100936163B1 (en) Refractories for industrial iron and steel
KR20190047485A (en) Ceramic Coat Composition having High Heat Resistance
JP4234330B2 (en) Amorphous refractory composition
KR101047358B1 (en) Refractory Compositions for Steel Industry
CN1298465C (en) Bottom fire-proof material of large steel ladle
CN114195529A (en) High-strength magnesium refractory mortar for refining steel ladle
JP2001114571A (en) Castable refractory for trough of blast furnace
KR100708414B1 (en) Refractories for manufacture iron and steel
KR101489381B1 (en) Refractory composition and furnace runner cover of using it
JP2874831B2 (en) Refractory for pouring
CN114773035A (en) Erosion-resistant magnesia refractory mortar for steel ladle
JP2004203702A (en) Monolithic refractory containing serpentine or talc, applied body of the same, and furnace lined with the same
JPH06345550A (en) Castable refractory
JPH0633179B2 (en) Irregular refractory for pouring
CN107353022A (en) A kind of regenerated castable material using discarded blast furnace main channel material manufacture
CN106220208A (en) A kind of long-life iron runner castable
CN100410208C (en) High-alumina brick resisting cement clinker erosion and its production method
Richmond Doloma refractories
JP2004307293A (en) Monolithic refractory composition

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20121204

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20131203

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20141203

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20151202

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20161222

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20180103

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20190103

Year of fee payment: 10

FPAY Annual fee payment

Payment date: 20200102

Year of fee payment: 11