CN1048967C - 烧成油浸镁白云石砖及制作工艺 - Google Patents

烧成油浸镁白云石砖及制作工艺 Download PDF

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CN1048967C
CN1048967C CN96115486A CN96115486A CN1048967C CN 1048967 C CN1048967 C CN 1048967C CN 96115486 A CN96115486 A CN 96115486A CN 96115486 A CN96115486 A CN 96115486A CN 1048967 C CN1048967 C CN 1048967C
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王守彬
王守昆
虞啸松
高心奎
冀国志
陈太礼
慕德军
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QINGHUA MAGNESIUM ORE CORP YINGKOU
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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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B2/00—Lime, magnesia or dolomite
    • C04B2/10—Preheating, burning calcining or cooling
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/47—Oils, fats or waxes natural resins
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
    • C04B2111/00887—Ferrous metallurgy
    • 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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Abstract

一种烧成油浸镁白云石砖，其化学成份重量比为MgO75-80%，CaO17-22%，SiO2+Fe2O3+Al2O30-3%，将菱镁石和白云石通过轻烧、消化、磨细、湿碾、压密成球、重烧、破碎、混练成型后浸油而制成，该成品砖有较高的抗熔渣化学侵蚀性，耐高温强度大，热稳定性高，用于AOD、VOD精炼炉和转炉炉衬用耐火材料。

Description

烧成油浸镁白云石砖及制作工艺
本发明涉及一种应用于AOD、VOD精炼炉和转炉炉衬的烧成油浸镁白云石砖耐火材料及制作方法。
目前国内AOD、VOD精炼炉和转炉衬的耐火材料抗溶渣的化学侵蚀、热稳定性、抗高温强度相对较低，因此使用周期短，易于损坏，使生产成本增高。
本发明的目的是提供一种有较高的抗熔渣化学侵蚀，热稳定性高，抗高温强度大的烧成油浸镁白云石砖及其制作方法。
为实现上述目的，本发明的技术方案是：烧成油浸镁白云石砖，其化学成份重量比为  MgO 75-80％，
CaO 17-22％，
SiO2+Fe2O3+Al2O3 0-3％。
烧成油浸镁白云石砖的制作工艺步骤依次如下：
(一)原料的制备：
①分别将菱镁石和白云石进行轻烧，轻烧温度低于1200℃；
②将轻烧白云石砂加水20-40％进行消化；
③将消化后的轻烧白云石砂和轻烧菱镁砂进行配料，轻烧白云石砂∶轻烧菱镁砂＝30-45∶55-70；
④配好料后进行细磨成细粉，用湿碾机进行混练，加水10-20％；
⑤将练好的泥料压球，自然干燥24-48小时；
⑥干燥后的球坯采用以低灰粉的焦炭和煤为燃料的高温竖窑进行煅烧，煅烧温度为1700-2000℃，煅烧成合成镁白云石砂，其指标：
MgO75-80％，CaO17-22％，D.B≥3.20g/cm3；
(二)制砖工艺：
①将合成镁白云石砂破粉碎成粒度为8-5mm、5-2mm和2-0mm的颗粒料，用部份2-0mm料磨制＜0.088mm的细粉；
②进行配料；8-5mm合成镁白云石砂占5-10％，
            5-2mm合成镁白云石砂占30-40％，
            2-0mm合成镁白云石砂占20-30％，
            ＜0.088mm的细粉占20-30％；
③颗粒料要在料仓内加热至30-60℃；
④采用石蜡作结合剂，加入量3-4％；
⑤配好的料用混砂机进行混料，泥料温度控制在30-50℃之间；
⑥砖坯在800t和1000t摩擦压砖机上成型，砖坯密度在3.0g/cm3以上；
⑦成型后砖坯不经干燥直接码到窑车上入超高温隧道窑烧成，烧成最高温度控制在1600-1650℃，制品烧成后经真空油浸，将砖予热至150-200℃，装入浸罐，抽真空后注入150-200℃的焦油沥青，然后加压1-2MPa下浸渍4小时。
本发明由于采用高纯原料-合成镁白云石砂和制品烧成后经真空油浸，所以具有较高抗熔渣的化学侵蚀能力；原料中MgO/CaO比适当，制砖配料颗粒组成合理，使本发明具有较高的热稳定性；二步煅烧合成合成高纯镁白云石砂和制品抗高温强度高；高压成型工艺提高了砖坯密度，降低气孔率。本发明的显气孔率≤3％，体积密度≥3.05g/cm3，常温耐压强度≥70MPa，0.2MPa荷重软化点≥1700℃。
实施例1
烧成油浸镁白云石砖，其化学成份重量百分比为：
MgO 75％
CaO 22％，
SiO2+Fe2O3+Al2O3 3％。
制作工艺：
一、原料的制备
用高品位的菱镁石和白云石进行轻烧，轻烧窑以煤气为燃料，没有污染，提高原料的纯度。轻烧温度低于1200℃。轻烧白云石砂加水20-40％进行消化。消化后的轻烧白云石砂和轻烧镁砂按一定比例进行配料。轻烧白云石砂∶轻烧镁砂＝30-45∶55-70。配好的料用雷蒙机细磨，磨制后的细粉用湿碾机进行混练，加水10-20％，混练好的泥料经压球机压球，压好的球经自然干燥24-48小时。干燥后的球坯采用以低灰粉的焦炭和煤为燃料的高温竖窑进行煅烧。煅烧温度1700-2000℃。煅烧出杂质含量低，煅烧程度好的合成镁白云石砂。
二、制砖工艺
将合成镁白云石砂破粉碎成粒度为8-5mm、5-2mm和2-0mm的颗粒料，用部份2-0mm料磨制＜0.088mm的细粉，进行配料：8-5mm合成镁白云石砂占5-10％，
         5-2mm合成镁白云石砂占30-40％，
         2-0mm合成镁白云石砂占20-30％，
         ＜0.088mm的细粉占20-30％；颗粒料要在料仓内加热至30-60℃；采用石蜡作结合剂，加入量3-4％；配好的料用混砂机进行混料，泥料温度控制在30-50℃之间；砖坯在800t和1000t摩擦压砖机上成型，砖坯密度在3.0g/cm3以上；成型后砖坯不经干燥直接码到窑车上入超高温隧道窑烧成，烧成最高温度控制在1600-1650℃，制品烧成后经真空油浸，将砖予热至150-200℃，装入浸罐，抽真空后注入150-200℃的焦油沥青，然后加压1-2MPa下浸渍4小时。
实施例2
烧成油浸镁白云石砖，其化学成份重量百分比为：
MgO 80％
CaO 17％，
SiO2+Fe2O3+Al2O3 3％。
制作工艺同实施例1。
实施例3
烧成油侵镁白云石砖，其化学成份重量百分比为：
MgO 77％
CaO 20％，
SiO2+Fe2O3+Al2O3 3％。
制作工艺同实施例1。

Claims (1)

1、一种烧成油浸镁白云石砖的制作工艺，其特征如以下步骤依次为：
(一)原料的制备：
①分别将菱镁石和白云石进行轻烧，轻烧温度低于1200℃；
②将轻烧白云石砂加水20-40％进行消化；
③将消化后的轻烧白云石砂和轻烧菱镁砂进行配料，轻烧白云石砂∶轻烧菱镁砂＝30-45∶55-70；
④配好料后进行细磨成细粉，用湿碾机进行混练，加水10-20％；
⑤将练好的泥料压球，自然干燥24-48小时；
⑥干燥后的球坯采用以低灰粉的焦炭和煤为燃料的高温竖窑进行煅烧，煅烧温度为1700-2000℃，煅烧成合成镁白云石砂，其指标：
MgO75-80％，CaO17-22％，D.B≥3.20g/cm3；
(二)制砖工艺：
①将合成镁白云石砂破粉碎成粒度为8-5mm、5-2mm和2-0mm的颗粒料，用部份2-0mm料磨制＜0.088mm的细粉；
②进行配料：8-5mm合成镁白云石砂占5-10％，
            5-2mm合成镁白云石砂占30-40％，
            2-0mm合成镁白云石砂占20-30％，
            ＜0.088mm的细粉占20-30％；
③颗粒料要在料仓内加热至30-60℃；
④采用石蜡作结合剂，加入量3-4％；
⑤配好的料用混砂机进行混料，泥料温度控制在30-50℃之间；
⑥砖坯在800t和1000t摩擦压砖机上成型，砖坯密度在3.0g/cm3以上；
⑦成型后砖坯不经干燥直接码到窑车上入超高温隧道窑烧成，烧成最高温度控制在1600-1650℃，制品烧成后经真空油浸，将砖予热至150-200℃，装入浸罐，抽真空后注入150-200℃的焦油沥青，然后加压1-2MPa下浸渍4小时。
CN96115486A 1996-07-25 1996-07-25 烧成油浸镁白云石砖及制作工艺 Expired - Fee Related CN1048967C (zh)

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Publication number Priority date Publication date Assignee Title
CN102060505B (zh) * 2010-11-26 2012-11-21 武汉钢铁(集团)公司 白云石尾矿砖的制备方法
CN102765951A (zh) * 2012-08-02 2012-11-07 营口青花耐火材料股份有限公司 镁钙钛碳砖及其制备方法
CN102899455B (zh) * 2012-09-11 2014-04-16 山西太钢不锈钢股份有限公司 一种氩氧炉及其操作方法
CN113121198A (zh) * 2021-05-07 2021-07-16 江苏科技大学 一种明式砖制备方法及明式砖

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1101228A (en) * 1964-10-02 1968-01-31 Dolomitwerke Gmbh Method of lengthening the shelf life of highly refractory tar-impregnated dolomite bricks
CN85100432A (zh) * 1985-04-05 1986-10-01 冶金部洛阳耐火材料研究所 常温成型沥青结合炼钢炉衬砖
CN86210609U (zh) * 1986-12-23 1987-12-16 东北耐火材料厂 油浸铝镁料混凝土预制钢包衬

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1101228A (en) * 1964-10-02 1968-01-31 Dolomitwerke Gmbh Method of lengthening the shelf life of highly refractory tar-impregnated dolomite bricks
CN85100432A (zh) * 1985-04-05 1986-10-01 冶金部洛阳耐火材料研究所 常温成型沥青结合炼钢炉衬砖
CN86210609U (zh) * 1986-12-23 1987-12-16 东北耐火材料厂 油浸铝镁料混凝土预制钢包衬

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