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Method for producing metallurgical lime by using highly pulverized limestone
The invention provides a method for producing metallurgical lime by using highly-pulverized limestone, and belongs to the field of lime calcination. The method comprises the following specific steps: screening highly-pulverized limestone with the particle size of 20-40mm by a feeding sieve, and mixing the screened highly-pulverized limestone in an overhead bunker of a rotary kiln; highly-pulverized limestone in the overhead bunker enters a preheating chamber of the vertical preheater through an auxiliary blanking pipe, and the highly-pulverized limestone in the preheating chamber of the vertical preheater is preheated to 900 +/-50 DEG C; the preheated highly-pulverized limestone enters a rotary kiln through a transfer chute to be calcined; the high-pulverization limestone is calcined into metallurgical lime in the rotary kiln, the metallurgical lime enters a vertical cooler to be cooled, after multi-point cooling is conducted through the vertical cooler, the ash temperature is reduced to 130 DEG C or below, and the metallurgical lime is discharged through a vibration ash discharging machine to complete calcination. According to the method disclosed by the invention, metallurgical lime production is carried out, the highly-pulverized limestone can be normally utilized, CaO of the lime is improved from 78% to 87% or above, the activity is improved from 250ml to 360ml, the highly-pulverized limestone in the local area can be fully utilized for production, and the purchase quantity of outsourced limestone is reduced.
本发明提供了一种使用高粉化石灰石生产冶金石灰的方法，属于石灰煅烧领域。本发明具体步骤：粒度为20‑40mm的高粉化石灰石经上料筛筛分后进入回转窑高位料仓混合；高位料仓内的高粉化石灰石经辅助下料管进入竖式预热器预热室，在竖式预热器预热室内高粉化石灰石预热到900±50℃；预热后的高粉化石灰石经转运溜槽进入回转窑煅烧；高粉化石灰石在转窑内煅烧成冶金石灰后进入竖式冷却器冷却，经竖式冷却器多点冷却后，灰温降到130℃以下，经振动出灰机排出完成煅烧。本发明按本申请的方法进行冶金石灰生产，高粉化石灰石可正常得到利用，石灰CaO由78％提高至87％以上，活性度由250ml提高到360ml，可充分利用本地区高粉化石灰石生产，减少外购石灰石采购量。
Method for producing metallurgical lime by using highly pulverized limestone
The invention provides a method for producing metallurgical lime by using highly-pulverized limestone, and belongs to the field of lime calcination. The method comprises the following specific steps: screening highly-pulverized limestone with the particle size of 20-40mm by a feeding sieve, and mixing the screened highly-pulverized limestone in an overhead bunker of a rotary kiln; highly-pulverized limestone in the overhead bunker enters a preheating chamber of the vertical preheater through an auxiliary blanking pipe, and the highly-pulverized limestone in the preheating chamber of the vertical preheater is preheated to 900 +/-50 DEG C; the preheated highly-pulverized limestone enters a rotary kiln through a transfer chute to be calcined; the high-pulverization limestone is calcined into metallurgical lime in the rotary kiln, the metallurgical lime enters a vertical cooler to be cooled, after multi-point cooling is conducted through the vertical cooler, the ash temperature is reduced to 130 DEG C or below, and the metallurgical lime is discharged through a vibration ash discharging machine to complete calcination. According to the method disclosed by the invention, metallurgical lime production is carried out, the highly-pulverized limestone can be normally utilized, CaO of the lime is improved from 78% to 87% or above, the activity is improved from 250ml to 360ml, the highly-pulverized limestone in the local area can be fully utilized for production, and the purchase quantity of outsourced limestone is reduced.
本发明提供了一种使用高粉化石灰石生产冶金石灰的方法，属于石灰煅烧领域。本发明具体步骤：粒度为20‑40mm的高粉化石灰石经上料筛筛分后进入回转窑高位料仓混合；高位料仓内的高粉化石灰石经辅助下料管进入竖式预热器预热室，在竖式预热器预热室内高粉化石灰石预热到900±50℃；预热后的高粉化石灰石经转运溜槽进入回转窑煅烧；高粉化石灰石在转窑内煅烧成冶金石灰后进入竖式冷却器冷却，经竖式冷却器多点冷却后，灰温降到130℃以下，经振动出灰机排出完成煅烧。本发明按本申请的方法进行冶金石灰生产，高粉化石灰石可正常得到利用，石灰CaO由78％提高至87％以上，活性度由250ml提高到360ml，可充分利用本地区高粉化石灰石生产，减少外购石灰石采购量。
Method for producing metallurgical lime by using highly pulverized limestone
一种使用高粉化石灰石生产冶金石灰的方法
ZHANG YOUCHEN (author) / LIU BAOSHUN (author) / WANG FEI (author) / YANG YOU (author)
2023-07-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Improved Coagulation by the Use of Pulverized Limestone
| Wiley | 1951
Physical characterization of limestone and lime
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