静爆剂中氧化钙在不同煅烧条件下的性能研究

doi:10.19964/j.issn.1006-4990.2022-0691

Abstract

Abstract:

Calcite was calcined by using KRX-17B high temperature electric furnace vacuum environment under different calcination conditions to fire calcium oxide clinker，the hydration activity test showed that when the calcination temperature was decreased from 1 300 ℃ to 1 200 ℃，the calcium oxide hydration reaction rate was changed like“jumping”，the evolution of calcium oxide clinker micromorphology under different calcination conditions were observed and analyzed by tungsten filament scanning electron microscope（SEM），and it was found that the higher the calcination temperature and the longer the constant temperature time，the calcium oxide clinker matrix changed from loose，porous and agglomeration to strict and dense.“Thermal effect”could explain the effect of temperature on calcium oxide′s hydration resistance and swelling properties.The expansion pressure of the prepared roll static crusher measured by“outer pipe method” showed that the constant temperature time was constant，when the clinker calcination temperature was increased from 1 300 ℃ to 1 500 ℃，the expansion pressure of the prepared roll crusher was increased by 25.6 MPa.The calcination temperature was certain，when the constant temperature time was extended from 5 h to 25 h，the expansion pressure of the prepared roll static crusher was increased by 23.4 MPa.

Key words: calcium oxide, high temperature calcination conditions, hydration resistance, rolling up with static crushing agent, expansion pressure

CLC Number:

TQ132.32

DU Guanggang, HE Tong, XU Zehui, LIU Lei. Study on properties of calcium oxide in SCA under different calcination conditions[J]. Inorganic Chemicals Industry, 2023, 55(10): 35-41.

Figures/Tables 9

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Table 1

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煅烧温度/℃	密度/（g∙cm^-3）
1 300	1.26
1 400	1.36
1 500	1.58

恒温时间/ h	方解石表观密度/ （g∙cm^-3）（理论值）	熟料密度/ （g∙cm^-3）
5	2.61	1.58
10	2.61	1.67
15	2.61	1.75
20	2.61	1.82
25	2.61	1.91

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Study on properties of calcium oxide in SCA under different calcination conditions

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