CN106007742B - 一种红土镍矿回转窑用钛铝酸钙砖及其制备方法 - Google Patents

一种红土镍矿回转窑用钛铝酸钙砖及其制备方法 Download PDF

Info

Publication number
CN106007742B
CN106007742B CN201610316974.XA CN201610316974A CN106007742B CN 106007742 B CN106007742 B CN 106007742B CN 201610316974 A CN201610316974 A CN 201610316974A CN 106007742 B CN106007742 B CN 106007742B
Authority
CN
China
Prior art keywords
rotary kiln
nickel ore
calcium aluminate
lateritic nickel
titanium
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN201610316974.XA
Other languages
English (en)
Other versions
CN106007742A (zh
Inventor
张寒
李雪松
谈凯强
魏崇阳
周佳昌
邹宜名
赵惠忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JINZHOU GUOTAI INDUSTRIAL Co.,Ltd.
Original Assignee
Wuhan University of Science and Engineering WUSE
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 Wuhan University of Science and Engineering WUSE filed Critical Wuhan University of Science and Engineering WUSE
Priority to CN201610316974.XA priority Critical patent/CN106007742B/zh
Publication of CN106007742A publication Critical patent/CN106007742A/zh
Application granted granted Critical
Publication of CN106007742B publication Critical patent/CN106007742B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C04B35/44—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 aluminates
    • 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
    • C04B35/46—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 titanium oxides or titanates
    • C04B35/462—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 titanium oxides or titanates based on titanates
    • C04B35/465—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 titanium oxides or titanates based on titanates based on alkaline earth metal titanates
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • 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
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • C04B2235/9615—Linear firing shrinkage
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • C04B2235/9623—Ceramic setters properties
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

本发明涉及一种红土镍矿回转窑用钛铝酸钙砖及其制备方法。其技术方案是：以50~55wt%的钛铁渣颗粒和10~15wt%的高纯镁砂颗粒为骨料，以13~18wt%的钛铁渣细粉、15~20wt%的碳酸镁细粉、1~3wt%的γ‑Al2O3微粉和1~4wt%的二氧化钛微粉为基质料。先将混匀后的基质料加入骨料中，搅拌；再外加基质料与骨料之和2~3wt%的热固性酚醛树脂，混匀，机压成型，在25~30℃条件下养护，在180~200℃条件下干燥；然后置于电阻炉中，以5~6℃/min的速率升温至1450~1500℃，保温2~3小时，随炉冷却，制得红土镍矿回转窑用钛铝酸钙砖。本发明具有成本低廉和工艺简单的特点；制备的红土镍矿回转窑用钛铝酸钙砖的体积稳定性好、导热系数小和抗渣侵蚀性强。

Description

一种红土镍矿回转窑用钛铝酸钙砖及其制备方法
技术领域
本发明属于红土镍矿回转窑用耐火材料技术领域。具体涉及一种红土镍矿回转窑用钛铝酸钙砖及其制备方法。
背景技术
回转窑-电炉法（RKEF工艺）是火法冶炼红土镍矿成熟的技术手段。红土镍矿在回转窑中受热脱水、焙烧还原，同时产生大量熔渣。因此，红土镍矿回转窑用耐火材料既要低导热以保护回转窑筒体、节约能源，又要具有优良的抗渣侵蚀性能，而且还要在高温还原气氛条件下稳定服役，这对红土镍矿回转窑用耐火材料提出了严格的质量要求。
目前，红土镍矿回转窑用耐火材料主要为镁砖、镁尖晶石砖和镁铝锆砖。
采用镁砖作为红土镍矿回转窑用耐火材料，其耐火度高、还原气氛下工作稳定，但镁砖导热系数大，导热性能强，导致回转窑筒体温度偏高而变形，降低了回转窑的服役寿命，同时也造成了能源的浪费。
采用镁尖晶石砖作为红土镍矿回转窑用耐火材料，其导热性能相较镁砖而言有所降低，但尖晶石的引入易引发耐火材料内部热膨胀失衡而产生微裂纹，显著降低了镁尖晶石砖的抗渣侵蚀性能。
采用镁铝锆砖作为红土镍矿回转窑用耐火材料，一般以高纯镁砂、预合成微孔镁铝尖晶石和普通镁铝尖晶石、氧化锆（锆源）为主要原料（潘料庭，等．红土镍矿回转窑用低导镁铝锆砖的研制与实践．铁合金，2015，(3)：pp19~42），通过预合成微孔镁铝尖晶石的引入降低耐火材料的导热系数，而氧化锆的马氏体相变一定程度上可以吸收材料内部的热应力，（孙加林，等．MgO-Al2O3-ZrO2质耐火材料的显微结构分析．耐火材料，1996，30(6)：pp255~258）减小裂纹的产生与扩展，有利于保障材料的抗渣侵蚀性能（杨道媛，等．含ZrO2添加剂对方镁石尖晶石耐火材料力学性能的影响．耐火材料，2002，34(2)：pp79~81）。但镁铝锆砖制备工艺复杂（一般先预合成微孔镁铝尖晶石），且微孔镁铝尖晶石、氧化锆等耐火原料的价格昂贵，大大增加了红土镍矿回转窑用耐火材料的开发成本。
发明内容
本发明旨在克服现有技术缺陷，目的在于提供一种成本低廉和工艺流程简单的红土镍矿回转窑用钛铝酸钙砖的制备方法，用该方法制备的红土镍矿回转窑用钛铝酸钙砖的体积稳定性好、导热系数小和抗渣侵蚀性强。
为实现上述目的，本发明采用的技术方案是：以50~55wt%的钛铁渣颗粒和10~15wt%的高纯镁砂颗粒为骨料，以13~18wt%的钛铁渣细粉、15~20wt%的碳酸镁细粉、1~3wt%的γ-Al2O3微粉和1~4wt%的二氧化钛微粉为基质料；按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀；然后外加占所述基质料与所述骨料之和2~3wt%的热固性酚醛树脂，混合均匀，机压成型，在25~30℃条件下养护12~24小时，在180~200℃条件下保温12~18小时；最后置于电阻炉中，以5~6℃/min的升温速率升温至1450~1500℃，保温2~3小时，随炉冷却，制得红土镍矿回转窑用钛铝酸钙砖。
所述钛铁渣为冶炼钛铁合金所产生的炉渣，钛铁渣的主要物相为钛铝酸钙、刚玉、六铝酸钙、二铝酸钙和钛酸钙；所述钛铁渣的主要化学成分是：Al2O3含量为70~80wt%，TiO2含量为9~13wt%，CaO含量为8~14wt%，Fe2O3含量＜2wt%。
所述钛铁渣颗粒的粒度为0.1~6mm；所述钛铁渣细粉的粒度为0.088~0.1mm。
所述高纯镁砂颗粒的主要化学成分是：MgO含量≥97wt%，SiO2含量≤0.5wt%；高纯镁砂颗粒的粒度为0.1~6mm。
所述碳酸镁细粉的MgCO3含量≥99wt%；碳酸镁细粉的粒度为0.064~0.088mm。
所述γ-Al2O3微粉的Al2O3含量≥99wt%，γ-Al2O3微粉的粒度为1~2μm。
所述二氧化钛微粉的TiO2含量≥99wt%，二氧化钛微粉的粒度为1~2μm。
所述热固性酚醛树脂的C含量≥60wt%。
所述机压成型的压力为180~200MPa。
由于采取上述技术方案，本发明与现有技术相比具有如下积极效果：
1、本发明以钛铁渣为主要原料，大大降低了红土镍矿回转窑用耐火材料的开发成本，同时提高了废渣的利用率，节约资源。
2、本发明无需特殊的制备设备和处理技术，节省劳动力资源，工艺流程简单；
3、本发明通过原料组分的化学反应原位形成低导相，进而降低了材料的导热系数；同时，利用物相间的体积效应，提高了材料的体积稳定性和抗渣侵蚀性能。
本发明制备的红土镍矿回转窑用钛铝酸钙砖经测定：烧后线变化为0.22~0.27%；导热系数（500℃温度条件下测定）为4.58~4.63W/(m·K)；1500℃×3h静态坩埚法抗渣实验侵蚀指数为3~8%。
因此，本发明具有成本低廉和工艺流程简单的特点；所制备的红土镍矿回转窑用钛铝酸钙砖的体积稳定性好、导热系数小和抗渣侵蚀性强。
具体实施方式
下面结合具体实施方式对本发明作进一步的描述，并非对其保护范围的限制。
为避免重复，现将本具体实施方式中的骨料、基质料、热固性酚醛树脂和机压成型统一描述如下，实施例中不再赘述：
所述钛铁渣为冶炼钛铁合金所产生的炉渣，钛铁渣的主要物相为钛铝酸钙、刚玉、六铝酸钙、二铝酸钙和钛酸钙；所述钛铁渣的主要化学成分是：Al2O3含量为70~80wt%，TiO2含量为9~13wt%，CaO含量为8~14wt%，Fe2O3含量＜2wt%。
所述钛铁渣颗粒的粒度为0.1~6mm；所述钛铁渣细粉的粒度为0.088~0.1mm。
所述高纯镁砂颗粒的主要化学成分是：MgO含量≥97wt%，SiO2含量≤0.5wt%；高纯镁砂颗粒的粒度为0.1~6mm。
所述碳酸镁细粉的MgCO3含量≥99wt%；碳酸镁细粉的粒度为0.064~0.088mm。
所述γ-Al2O3微粉的Al2O3含量≥99wt%，γ-Al2O3微粉的粒度为1~2μm。
所述二氧化钛微粉的TiO2含量≥99wt%，二氧化钛微粉的粒度为1~2μm。
所述热固性酚醛树脂的C含量≥60wt%。
所述机压成型的压力为180~200MPa。
实施例１
一种红土镍矿回转窑用钛铝酸钙砖及其制备方法。以50~52wt%的钛铁渣颗粒和13~15wt%的高纯镁砂颗粒为骨料，以16~18wt%的钛铁渣细粉、15~17wt%的碳酸镁细粉、1~2wt%的γ-Al2O3微粉和1~3wt%的二氧化钛微粉为基质料；按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀；然后外加占所述基质料与所述骨料之和2~3wt%的热固性酚醛树脂，混合均匀，机压成型，在25~30℃条件下养护12~24小时，在180~200℃条件下保温12~18小时；最后置于电阻炉中，以5~6℃/min的升温速率升温至1450~1480℃，保温2~3小时，随炉冷却，制得红土镍矿回转窑用钛铝酸钙砖。
本实施例制备的红土镍矿回转窑用钛铝酸钙砖经测定：烧后线变化为0.22~0.24%；导热系数（500℃温度条件下测定）为4.61~4.63W/(m·K)；1500℃×3h静态坩埚法抗渣实验侵蚀指数为3~5%。
实施例2
一种红土镍矿回转窑用钛铝酸钙砖及其制备方法。以51~53wt%的钛铁渣颗粒和12~14wt%的高纯镁砂颗粒为骨料，以15~17wt%的钛铁渣细粉、16~18wt%的碳酸镁细粉、1~2wt%的γ-Al2O3微粉和1~3wt%的二氧化钛微粉为基质料；按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀；然后外加占所述基质料与所述骨料之和2~3wt%的热固性酚醛树脂，混合均匀，机压成型，在25~30℃条件下养护12~24小时，在180~200℃条件下保温12~18小时；最后置于电阻炉中，以5~6℃/min的升温速率升温至1450~1480℃，保温2~3小时，随炉冷却，制得红土镍矿回转窑用钛铝酸钙砖。
本实施例制备的红土镍矿回转窑用钛铝酸钙砖经测定：烧后线变化为0.23~0.25%；导热系数（500℃温度条件下测定）为4.60~4.62W/(m·K)；1500℃×3h静态坩埚法抗渣实验侵蚀指数为4~6%。
实施例3
一种红土镍矿回转窑用钛铝酸钙砖及其制备方法。以52~54wt%的钛铁渣颗粒和11~13wt%的高纯镁砂颗粒为骨料，以14~16wt%的钛铁渣细粉、17~19wt%的碳酸镁细粉、2~3wt%的γ-Al2O3微粉和2~4wt%的二氧化钛微粉为基质料；按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀；然后外加占所述基质料与所述骨料之和2~3wt%的热固性酚醛树脂，混合均匀，机压成型，在25~30℃条件下养护12~24小时，在180~200℃条件下保温12~18小时；最后置于电阻炉中，以5~6℃/min的升温速率升温至1470~1500℃，保温2~3小时，随炉冷却，制得红土镍矿回转窑用钛铝酸钙砖。
本实施例制备的红土镍矿回转窑用钛铝酸钙砖经测定：烧后线变化为0.24~0.26%；导热系数（500℃温度条件下测定）为4.59~4.61W/(m·K)；1500℃×3h静态坩埚法抗渣实验侵蚀指数为5~7%。
实施例4
一种红土镍矿回转窑用钛铝酸钙砖及其制备方法。以53~55wt%的钛铁渣颗粒和10~12wt%的高纯镁砂颗粒为骨料，以13~15wt%的钛铁渣细粉、18~20wt%的碳酸镁细粉、2~3wt%的γ-Al2O3微粉和2~4wt%的二氧化钛微粉为基质料；按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀；然后外加占所述基质料与所述骨料之和2~3wt%的热固性酚醛树脂，混合均匀，机压成型，在25~30℃条件下养护12~24小时，在180~200℃条件下保温12~18小时；最后置于电阻炉中，以5~6℃/min的升温速率升温至1470~1500℃，保温2~3小时，随炉冷却，制得红土镍矿回转窑用钛铝酸钙砖。
本实施例制备的红土镍矿回转窑用钛铝酸钙砖经测定：烧后线变化为0.25~0.27%；导热系数（500℃温度条件下测定）为4.58~4.60W/(m·K)；1500℃×3h静态坩埚法抗渣实验侵蚀指数为6~8%。
本发明与现有技术相比具有如下积极效果：
1、本发明以钛铁渣为主要原料，大大降低了红土镍矿回转窑用耐火材料的开发成本，同时提高了废渣的利用率，节约资源。
2、本发明无需特殊的制备设备和处理技术，节省劳动力资源，工艺流程简单；
3、本发明通过原料组分的化学反应原位形成低导相，进而降低了材料的导热系数；同时，利用物相间的体积效应，提高了材料的体积稳定性和抗渣侵蚀性能。
本发明制备的红土镍矿回转窑用钛铝酸钙砖经测定：烧后线变化为0.22~0.27%；导热系数（500℃温度条件下测定）为4.58~4.63W/(m·K)；1500℃×3h静态坩埚法抗渣实验侵蚀指数为3~8%。
因此，本发明具有成本低廉和工艺流程简单的特点；所制备的红土镍矿回转窑用钛铝酸钙砖的体积稳定性好、导热系数小和抗渣侵蚀性强。

Claims (8)

1.一种红土镍矿回转窑用钛铝酸钙砖的制备方法，其特征在于以50～55wt％的钛铁渣颗粒和10～15wt％的高纯镁砂颗粒为骨料，以13～18wt％的钛铁渣细粉、15～20wt％的碳酸镁细粉、1～3wt％的γ-Al2O3微粉和1～4wt％的二氧化钛微粉为基质料；按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀；然后外加占所述基质料与所述骨料之和2～3wt％的热固性酚醛树脂，混合均匀，机压成型，在25～30℃条件下养护12～24小时，在180～200℃条件下保温12～18小时；最后置于电阻炉中，以5～6℃/min的升温速率升温至1450～1500℃，保温2～3小时，随炉冷却，制得红土镍矿回转窑用钛铝酸钙砖；
所述钛铁渣为冶炼钛铁合金所产生的炉渣，所述钛铁渣的主要物相为钛铝酸钙、刚玉、六铝酸钙、二铝酸钙和钛酸钙；
所述钛铁渣的主要化学成分是：Al2O3含量为70～80wt％，TiO2含量为9～13wt％，CaO含量为8～14wt％，Fe2O3含量＜2wt％；所述钛铁渣颗粒的粒度为0.1～6mm；所述钛铁渣细粉的粒度为0.088～0.1mm。
2.根据权利要求1所述的红土镍矿回转窑用钛铝酸钙砖的制备方法，其特征在于所述高纯镁砂颗粒的主要化学成分是：MgO含量≥97wt％，SiO2含量≤0.5wt％；高纯镁砂颗粒的粒度为0.1～6mm。
3.根据权利要求1所述的红土镍矿回转窑用钛铝酸钙砖的制备方法，其特征在于所述碳酸镁细粉的MgCO3含量≥99wt％；碳酸镁细粉的粒度为0.064～0.088mm。
4.根据权利要求1所述的红土镍矿回转窑用钛铝酸钙砖的制备方法，其特征在于所述γ-Al2O3微粉的Al2O3含量≥99wt％，γ-Al2O3微粉的粒度为1～2μm。
5.根据权利要求1所述的红土镍矿回转窑用钛铝酸钙砖的制备方法，其特征在于所述二氧化钛微粉的TiO2含量≥99wt％，二氧化钛微粉的粒度为1～2μm。
6.根据权利要求1所述的红土镍矿回转窑用钛铝酸钙砖的制备方法，其特征在于所述热固性酚醛树脂的C含量≥60wt％。
7.根据权利要求1所述的红土镍矿回转窑用钛铝酸钙砖的制备方法，其特征在于所述机压成型的压力为180～200MPa。
8.一种红土镍矿回转窑用钛铝酸钙砖，其特征在于所述红土镍矿回转窑用钛铝酸钙砖是根据权利要求1～7项中任一项所述的红土镍矿回转窑用钛铝酸钙砖的制备方法所制备的红土镍矿回转窑用钛铝酸钙砖。
CN201610316974.XA 2016-05-13 2016-05-13 一种红土镍矿回转窑用钛铝酸钙砖及其制备方法 Active CN106007742B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610316974.XA CN106007742B (zh) 2016-05-13 2016-05-13 一种红土镍矿回转窑用钛铝酸钙砖及其制备方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610316974.XA CN106007742B (zh) 2016-05-13 2016-05-13 一种红土镍矿回转窑用钛铝酸钙砖及其制备方法

Publications (2)

Publication Number Publication Date
CN106007742A CN106007742A (zh) 2016-10-12
CN106007742B true CN106007742B (zh) 2018-06-19

Family

ID=57099830

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610316974.XA Active CN106007742B (zh) 2016-05-13 2016-05-13 一种红土镍矿回转窑用钛铝酸钙砖及其制备方法

Country Status (1)

Country Link
CN (1) CN106007742B (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106495714B (zh) * 2016-10-31 2019-04-26 武汉科技大学 一种蜂窝状钛铝酸钙空心球及其制备方法
CN106747341A (zh) * 2016-12-02 2017-05-31 郑州东方科技耐火材料有限公司 一种炭素焙烧炉用低蠕变节能环保耐火材料的制作方法
CN106747527A (zh) * 2017-03-01 2017-05-31 武汉科技大学 一种钛铝酸钙隔热耐火材料及其制备方法
CN106977181A (zh) * 2017-04-01 2017-07-25 海城市中兴高档镁质砖有限公司 一种转炉炉帽用镁铝钙钛碳砖及其制备方法
CN112125651B (zh) * 2020-09-03 2023-02-17 武汉理工大学 一种致密六铝酸钙-刚玉复相陶瓷的制备方法
CN113087517B (zh) * 2021-03-18 2023-01-17 武汉科技大学 以钛铁渣为主料的六铝酸钙-尖晶石多孔陶瓷及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103922772A (zh) * 2014-04-22 2014-07-16 武汉科技大学 以钛铁渣为主料的再生高铝耐火原料及其制备方法
CN104446556A (zh) * 2014-12-03 2015-03-25 武汉钢铁(集团)公司 利用钛铁渣制备的高炉出铁口炮泥及其制备方法
CN105036774A (zh) * 2015-08-04 2015-11-11 武汉科技大学 一种炼钒反射炉内衬用钛铝酸钙预制件及其制备方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103922772A (zh) * 2014-04-22 2014-07-16 武汉科技大学 以钛铁渣为主料的再生高铝耐火原料及其制备方法
CN104446556A (zh) * 2014-12-03 2015-03-25 武汉钢铁(集团)公司 利用钛铁渣制备的高炉出铁口炮泥及其制备方法
CN105036774A (zh) * 2015-08-04 2015-11-11 武汉科技大学 一种炼钒反射炉内衬用钛铝酸钙预制件及其制备方法

Also Published As

Publication number Publication date
CN106007742A (zh) 2016-10-12

Similar Documents

Publication Publication Date Title
CN106007742B (zh) 一种红土镍矿回转窑用钛铝酸钙砖及其制备方法
Ren et al. From magnesite directly to lightweight closed-pore MgO ceramics: the role of Si and Si/SiC
CN102617171B (zh) 一种MgAlON结合铝镁质透气砖及其制备方法
CN103570364B (zh) 一种不烧镁铝尖晶石砖
CN105585322A (zh) 一种抗渣侵蚀镁尖晶石砖及其制备方法
CN102030545A (zh) 一种MgAl2O4-CaAl12O19复相耐高温材料及其制备方法
CN101654365B (zh) 一种电熔铁铝尖晶石-刚玉复合材料及其制备方法
CN104193368A (zh) 一种rh精炼炉用镁尖晶石砖及其制备方法
CN104692820B (zh) 一种高温致密的不烧复合砖及其成型工艺
CN105272275A (zh) 一种基于镍铁渣的镁橄榄石轻质隔热砖及其制备方法
CN108069708A (zh) 一种高热震长寿命匣钵及制备方法
CN104446390A (zh) 一种含镁改性刚玉复相材料制备方法
CN101857453A (zh) 一种方镁石-铁铝尖晶石耐火材料及其制备方法
CN103848618A (zh) 一种合成铁铝尖晶石及其生产方法
CN108191439A (zh) 一种高炉渣高温碳化电炉用耐火砖及其制备方法
US20210284579A1 (en) Titanium-containing calcium hexaaluminate material and preparation method thereof
CN106336227B (zh) 一种矿产废弃物耐火材料及其制备工艺
CN107216132A (zh) 一种RH精炼炉用MgO‑MA不烧砖及其制备方法
CN108129137A (zh) 大型水泥回转窑用复合镁铝尖晶石砖及其生产方法
CN106083094B (zh) 一种炼铜转炉风口砖及其制备方法
CN103011857B (zh) 有色冶金窑炉用富镁尖晶石锆砖
CN110606733A (zh) 一种改性镁碳砖及其制备方法
CN106830955A (zh) 一种微波干燥制备不烧改性高纯镁铝尖晶石复合砖的方法
CN103073206B (zh) 一种含镁铝尖晶石的铝酸盐水泥及其制备方法
CN103102166B (zh) 一种镁尖晶石锆砖的制备方法

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20210407

Address after: 121100 SHIJIAPUZI village, Gaotaizi Town, Yi County, Jinzhou City, Liaoning Province

Patentee after: JINZHOU GUOTAI INDUSTRIAL Co.,Ltd.

Address before: 430081 construction of Qingshan District, Hubei, Wuhan

Patentee before: WUHAN University OF SCIENCE AND TECHNOLOGY