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A platform for research: civil engineering, architecture and urbanism
Dry regeneration method for waste magnesia carbon bricks
The invention relates to a dry regeneration method of waste magnesia carbon bricks. The method comprises the following steps: 1, crushing and screening waste magnesia carbon bricks, and screening crushed materials with the granularity of 3-5 mm; 2, mixing the crushed materials; 3, preheating the crushed material which is uniformly mixed, wherein the heating temperature is 500 DEG C to 600 DEG C; 4, carrying out secondary screening, wherein the heated crushed materials are subjected to secondary crushing in heat preservation equipment till the particle size is 1-2 mm while magnetic separation is conducted at the same time, and iron-containing fine particles are removed; and 5, regenerating, wherein the fine crushed material is mixed with fused magnesite, alumina powder, boron nitride, micro-powder graphite and the like, and blank making and drying are performed to obtain the regenerated magnesia carbon brick. According to the method, dry regeneration is adopted, low-melting slag adhering to the surfaces of the waste magnesia carbon bricks is removed through preheating, then iron sheets in gaps of waste are removed through magnetic separation, and the method has the advantages of being low in energy consumption and high in waste adding amount.
本发明涉及一种废镁碳砖干法再生方法，包括以下步骤：步骤一为对废弃镁碳砖进行破碎与筛选，筛选粒度为3‑5mm的破碎料；步骤二为对破碎料进行混料；步骤三为对混合均匀的破碎料进行预加热，加热温度为500‑600℃；步骤四为二次筛选，对加热后的破碎料在保温设备中进行二次破碎至粒径为1‑2mm，同时进行磁选，将含铁细颗粒去除；步骤五为再生，将上述细破碎料与电熔镁砂、氧化铝粉、氮化硼、微粉石墨等进行混合后制坯干燥即得到再生镁碳砖。本发明的方法为干法再生，利用预加热去除废弃镁碳砖表面低熔挂渣，再利用磁选去除废料缝隙中的铁片，具有能耗低、废料添加量高的优点。
Dry regeneration method for waste magnesia carbon bricks
The invention relates to a dry regeneration method of waste magnesia carbon bricks. The method comprises the following steps: 1, crushing and screening waste magnesia carbon bricks, and screening crushed materials with the granularity of 3-5 mm; 2, mixing the crushed materials; 3, preheating the crushed material which is uniformly mixed, wherein the heating temperature is 500 DEG C to 600 DEG C; 4, carrying out secondary screening, wherein the heated crushed materials are subjected to secondary crushing in heat preservation equipment till the particle size is 1-2 mm while magnetic separation is conducted at the same time, and iron-containing fine particles are removed; and 5, regenerating, wherein the fine crushed material is mixed with fused magnesite, alumina powder, boron nitride, micro-powder graphite and the like, and blank making and drying are performed to obtain the regenerated magnesia carbon brick. According to the method, dry regeneration is adopted, low-melting slag adhering to the surfaces of the waste magnesia carbon bricks is removed through preheating, then iron sheets in gaps of waste are removed through magnetic separation, and the method has the advantages of being low in energy consumption and high in waste adding amount.
本发明涉及一种废镁碳砖干法再生方法，包括以下步骤：步骤一为对废弃镁碳砖进行破碎与筛选，筛选粒度为3‑5mm的破碎料；步骤二为对破碎料进行混料；步骤三为对混合均匀的破碎料进行预加热，加热温度为500‑600℃；步骤四为二次筛选，对加热后的破碎料在保温设备中进行二次破碎至粒径为1‑2mm，同时进行磁选，将含铁细颗粒去除；步骤五为再生，将上述细破碎料与电熔镁砂、氧化铝粉、氮化硼、微粉石墨等进行混合后制坯干燥即得到再生镁碳砖。本发明的方法为干法再生，利用预加热去除废弃镁碳砖表面低熔挂渣，再利用磁选去除废料缝隙中的铁片，具有能耗低、废料添加量高的优点。
Dry regeneration method for waste magnesia carbon bricks
一种废镁碳砖干法再生方法
SHAO XIAOLONG (author) / CHEN HONG (author) / YUAN XUEFENG (author)
2020-12-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2022