Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Zirconium-silicon-chromium-based ladle stuffing sand and preparation method thereof
The invention discloses zirconium-silicon-chromium-based ladle stuffing sand and a preparation method thereof. The preparation method comprises the following steps: mixing raw materials consisting of zircon sand, quartz sand, chromite sand and carbon black according to a certain weight ratio, and carrying out mechanical stirring, spray granulation, screening and cooling treatment to obtain target ladle stuffing sand powder. The obtained stuffing sand contains 24%-40% of ZrO2, 27%-37% of SiO2, 10%-20% of Cr2O3, 1%-8% of Al2O3, 4%-16% of Fe2O3 and less than 0.5% of H2O; the refractoriness of the stuffing sand is larger than 1850 DEG C; and the proportion of particles with particle sizes ranging from 0.1-1 mm is controlled to be 98% or above. According to the ladle stuffing sand prepared through the method, the raw materials can be fully and evenly mixed, and the influence of the segregation problem caused by uneven components on a self-opening rate is solved; and particularly, the self-opening rate of a high-quality special steel ladle with the refining time exceeding 3-8 hours is increased, and influence on the quality of molten steel caused by later oxygen burning and drainage is avoided.
本发明公开了一种锆硅铬基钢包引流砂及制备方法，通过原料：锆英砂、石英砂、铬铁矿砂和炭黑，按一定的重量配比混合，经机械搅拌、喷雾造粒、筛分、冷却处理得到目标引流砂粉末，得到的引流砂中含有24‑40％的ZrO2、27‑37％的SiO2、10‑20％的Cr2O3、1‑8％Al2O3、4‑16％Fe2O3和低于0.5％的H2O的引流砂，所述引流砂的耐火度大于1850℃，粒度为0.1‑1mm的颗粒比例控制在98％以上。采用本发明的方法所制备的引流砂能够使得原料得到充分均匀的混合，解决成分不均造成的偏析问题对自开率的影响，尤其是对于精炼时间超过3‑8小时的优特钢钢包的自开率的提升，避免了后期烧氧引流所造成的对钢水质量的影响。
Zirconium-silicon-chromium-based ladle stuffing sand and preparation method thereof
The invention discloses zirconium-silicon-chromium-based ladle stuffing sand and a preparation method thereof. The preparation method comprises the following steps: mixing raw materials consisting of zircon sand, quartz sand, chromite sand and carbon black according to a certain weight ratio, and carrying out mechanical stirring, spray granulation, screening and cooling treatment to obtain target ladle stuffing sand powder. The obtained stuffing sand contains 24%-40% of ZrO2, 27%-37% of SiO2, 10%-20% of Cr2O3, 1%-8% of Al2O3, 4%-16% of Fe2O3 and less than 0.5% of H2O; the refractoriness of the stuffing sand is larger than 1850 DEG C; and the proportion of particles with particle sizes ranging from 0.1-1 mm is controlled to be 98% or above. According to the ladle stuffing sand prepared through the method, the raw materials can be fully and evenly mixed, and the influence of the segregation problem caused by uneven components on a self-opening rate is solved; and particularly, the self-opening rate of a high-quality special steel ladle with the refining time exceeding 3-8 hours is increased, and influence on the quality of molten steel caused by later oxygen burning and drainage is avoided.
本发明公开了一种锆硅铬基钢包引流砂及制备方法，通过原料：锆英砂、石英砂、铬铁矿砂和炭黑，按一定的重量配比混合，经机械搅拌、喷雾造粒、筛分、冷却处理得到目标引流砂粉末，得到的引流砂中含有24‑40％的ZrO2、27‑37％的SiO2、10‑20％的Cr2O3、1‑8％Al2O3、4‑16％Fe2O3和低于0.5％的H2O的引流砂，所述引流砂的耐火度大于1850℃，粒度为0.1‑1mm的颗粒比例控制在98％以上。采用本发明的方法所制备的引流砂能够使得原料得到充分均匀的混合，解决成分不均造成的偏析问题对自开率的影响，尤其是对于精炼时间超过3‑8小时的优特钢钢包的自开率的提升，避免了后期烧氧引流所造成的对钢水质量的影响。
Zirconium-silicon-chromium-based ladle stuffing sand and preparation method thereof
一种锆硅铬基钢包引流砂及制备方法
LI SHANGBING (Autor:in) / CHEN YUANQING (Autor:in) / HUANG JIANJUN (Autor:in) / GENG HENGLIANG (Autor:in) / LI YANMEI (Autor:in) / MA ZHIJUN (Autor:in)
13.07.2021
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2024
Chromium stuffing sand covered by siliceous coating and preparation method thereof
| Europäisches Patentamt | 2024