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Method for efficiently calcining limestone with high pulverization rate in gas burning shaft kiln
The invention provides a method for efficiently calcining limestone with high pulverization rate in a gas burning shaft kiln, and belongs to the field of gas burning shaft kiln calcination. In the production process, part of air fuel is fed through bottom air, and the air fuel penetrates through the cooling section to be heated to high-temperature hot air; high-temperature hot air meets gas fuel fed by middle and lower side air of the calcining section, and primary combustion is completed in the calcining section; high-temperature combustible flue gas generated by primary combustion moves upwards, the combustible flue gas meets the other part of air fuel fed by the upper side air, secondary combustion occurs at the middle upper part of the calcining section, and the gas fuel is fully combusted. According to the novel method for efficiently calcining the high-pulverization-rate lime in the gas burning shaft kiln, the problem that an existing gas burning shaft kiln cannot be used for calcining a high-pulverization-rate limestone raw material is solved, and efficient calcination of the high-pulverization-rate limestone raw material is achieved; limestone with the pulverization rate smaller than or equal to 52% is adopted as the raw material, the raw material suitability of the gas burning shaft kiln is greatly widened, and the yield and quality of metallurgical lime are improved.
本发明提供了一种气烧竖窑高效煅烧高粉化率石灰石的方法，属于气烧竖窑煅烧领域。本发明在生产过程中，一部分空气燃料通过底风送入，空气燃料穿过冷却段加热至高温热风；高温热风与煅烧段中下侧风送入的气体燃料相遇，在煅烧段完成一次燃烧；一次燃烧生成的高温可燃烟气向上运动，可燃烟气与上侧风送入的另一部分空气燃料相遇，在煅烧段中上部发生二次燃烧，气体燃料被充分燃烧。本专利一种气烧竖窑高效煅烧高粉化率石灰的新方法，克服现有气烧竖窑无法煅烧高粉化率石灰石原料的问题，实现对高粉化率石灰石原料的高效煅烧；采用粉化率≤52％的石灰石作为原料，极大地扩宽气烧竖窑的原料适宜性，提高冶金石灰的产量和质量。
Method for efficiently calcining limestone with high pulverization rate in gas burning shaft kiln
The invention provides a method for efficiently calcining limestone with high pulverization rate in a gas burning shaft kiln, and belongs to the field of gas burning shaft kiln calcination. In the production process, part of air fuel is fed through bottom air, and the air fuel penetrates through the cooling section to be heated to high-temperature hot air; high-temperature hot air meets gas fuel fed by middle and lower side air of the calcining section, and primary combustion is completed in the calcining section; high-temperature combustible flue gas generated by primary combustion moves upwards, the combustible flue gas meets the other part of air fuel fed by the upper side air, secondary combustion occurs at the middle upper part of the calcining section, and the gas fuel is fully combusted. According to the novel method for efficiently calcining the high-pulverization-rate lime in the gas burning shaft kiln, the problem that an existing gas burning shaft kiln cannot be used for calcining a high-pulverization-rate limestone raw material is solved, and efficient calcination of the high-pulverization-rate limestone raw material is achieved; limestone with the pulverization rate smaller than or equal to 52% is adopted as the raw material, the raw material suitability of the gas burning shaft kiln is greatly widened, and the yield and quality of metallurgical lime are improved.
本发明提供了一种气烧竖窑高效煅烧高粉化率石灰石的方法，属于气烧竖窑煅烧领域。本发明在生产过程中，一部分空气燃料通过底风送入，空气燃料穿过冷却段加热至高温热风；高温热风与煅烧段中下侧风送入的气体燃料相遇，在煅烧段完成一次燃烧；一次燃烧生成的高温可燃烟气向上运动，可燃烟气与上侧风送入的另一部分空气燃料相遇，在煅烧段中上部发生二次燃烧，气体燃料被充分燃烧。本专利一种气烧竖窑高效煅烧高粉化率石灰的新方法，克服现有气烧竖窑无法煅烧高粉化率石灰石原料的问题，实现对高粉化率石灰石原料的高效煅烧；采用粉化率≤52％的石灰石作为原料，极大地扩宽气烧竖窑的原料适宜性，提高冶金石灰的产量和质量。
Method for efficiently calcining limestone with high pulverization rate in gas burning shaft kiln
一种气烧竖窑高效煅烧高粉化率石灰石的方法
CHENG WEIJIAO (author) / WANG GANG (author) / CANG QINGTAO (author) / QU CHANGLE (author) / WU BENHONG (author) / WEI QINGYANG (author) / XIAO ZUBIN (author) / TENG YU (author)
2023-12-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
F27B
Industrieöfen, Schachtöfen, Brennöfen, Retorten allgemein
,
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
Crushing processing system of limestone for calcining in lime kiln
| European Patent Office | 2022