考察了白云石煅烧工艺对煅烧白云石活性度的影响.结果表明,对于粒度为5～15 mm、15～20 mm、20～30 mm的白云石,其煅烧温度应分别控制在995、1005、1020℃.粒度为15～20 mm的白云石,在995℃下的煅烧时间为60～100 min.通过碳化工艺实验,优选出较合理的碳化工艺条件,即碳化在加压状态下进行,压力控制在0.30 MPa以上、温度控制在35℃以下、浆液中氧化镁质量浓度控制在10～12 g/L、碳酸化反应时间为50 min.%Influence of calcining technology on the activity of calcined dolomite was investigated.Results showed that the calcining temperatures should be controlled at 995 2,1 005 ℃,and 1 020 ℃ for the dolomite with particle size of 5～ 15 mm,15～20 mm,and 20～30 mm,respectively;at the calcining temperature of 995 ℃,calcination time for the dolomite with grain size of 15～20 mm was at 60～100 min.By the test of carbonation,the reasonable technological conditions were optimized,i.e.the carbonation was conducted under pressure and the pressure was controlled above 0.3 MPa;the temperature was below 35 ℃,the MgO mass concentration in the slurry was 10～12 g/L,and the carbonation time was 50 min.
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