Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Direct bonding magnesite-chrome brick for rotary cement kiln and preparation method of direct bonding magnesite-chrome brick
The invention relates to a direct bonding magnesite-chrome brick for a rotary cement kiln, which comprises the following components in parts by mass: 55-75 parts of fused magnesite, 35-50 parts of chromium concentrate, 2-4 parts of alpha-aluminum oxide, 0.6-1 part of nano rutile titanium dioxide, 0.5-1 part of metal chromium powder and dextrin solution accounting for 3-4% of the total mass of the components. The preparation method comprises the following steps: mixing: mixing and stirring the fused magnesite, the chromium concentrate, the alpha-aluminum oxide, the nano rutile titanium dioxide, the metal chromium powder and a dextrin solution to obtain pug; pressing the pug into a green brick, wherein the volume density of the obtained green brick is 3.25-3.35 g/cm < 3 >; drying: drying the green brick for 12-15 hours until the residual moisture is less than or equal to 0.5%; the green brick is fired, the firing temperature is controlled to be 1700-1800 DEG C, the time is 8-12 h, and the finished brick is obtained. The castable has the beneficial effects of low porosity, excellent erosion resistance, excellent slag resistance and good thermal shock resistance.
本发明涉及用于水泥回转窑的直接结合镁铬砖，55～75份电熔镁砂，35～50份铬精矿，2～4份α‑氧化铝，0.6～1份纳米金红石型钛白粉，0.5～1份金属铬粉，以及占上述组分总质量3％～4％的糊精溶液。制备方法，混炼：将电熔镁砂、铬精矿、α‑氧化铝、纳米金红石型钛白粉、金属铬粉和糊精溶液混合搅拌，得到泥料；将泥料压制成砖坯，所得砖坯的体积密度为3.25～3.35g/cm3；干燥：将砖坯干燥12～15h，干燥至残余水分≤0.5％；对砖坯进行烧制，控制烧制温度为1700～1800℃，时间为8～12h，得到成砖。有益效果是：具有较低的气孔率，优秀的抗侵蚀性能、抗渣性能和良好的热震稳定性。
Direct bonding magnesite-chrome brick for rotary cement kiln and preparation method of direct bonding magnesite-chrome brick
The invention relates to a direct bonding magnesite-chrome brick for a rotary cement kiln, which comprises the following components in parts by mass: 55-75 parts of fused magnesite, 35-50 parts of chromium concentrate, 2-4 parts of alpha-aluminum oxide, 0.6-1 part of nano rutile titanium dioxide, 0.5-1 part of metal chromium powder and dextrin solution accounting for 3-4% of the total mass of the components. The preparation method comprises the following steps: mixing: mixing and stirring the fused magnesite, the chromium concentrate, the alpha-aluminum oxide, the nano rutile titanium dioxide, the metal chromium powder and a dextrin solution to obtain pug; pressing the pug into a green brick, wherein the volume density of the obtained green brick is 3.25-3.35 g/cm < 3 >; drying: drying the green brick for 12-15 hours until the residual moisture is less than or equal to 0.5%; the green brick is fired, the firing temperature is controlled to be 1700-1800 DEG C, the time is 8-12 h, and the finished brick is obtained. The castable has the beneficial effects of low porosity, excellent erosion resistance, excellent slag resistance and good thermal shock resistance.
本发明涉及用于水泥回转窑的直接结合镁铬砖，55～75份电熔镁砂，35～50份铬精矿，2～4份α‑氧化铝，0.6～1份纳米金红石型钛白粉，0.5～1份金属铬粉，以及占上述组分总质量3％～4％的糊精溶液。制备方法，混炼：将电熔镁砂、铬精矿、α‑氧化铝、纳米金红石型钛白粉、金属铬粉和糊精溶液混合搅拌，得到泥料；将泥料压制成砖坯，所得砖坯的体积密度为3.25～3.35g/cm3；干燥：将砖坯干燥12～15h，干燥至残余水分≤0.5％；对砖坯进行烧制，控制烧制温度为1700～1800℃，时间为8～12h，得到成砖。有益效果是：具有较低的气孔率，优秀的抗侵蚀性能、抗渣性能和良好的热震稳定性。
Direct bonding magnesite-chrome brick for rotary cement kiln and preparation method of direct bonding magnesite-chrome brick
一种用于水泥回转窑的直接结合镁铬砖及其制备方法
HE YI (Autor:in) / CHEN NINGNA (Autor:in) / WU SHUJUN (Autor:in) / ZHANG LEI (Autor:in) / XIA CHANGYONG (Autor:in)
15.11.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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