机械化竖窑石灰石粒度分级利用与效益分析

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ANALYSISONTHEPARTICLESIZECLASSIFICATION UTILIZATIONANDBENEFITSOFLIMESTONEIN MECHANIZEDSHAFTKILNS

Xu RuiliangSun QianGao GuijunYin HaiyuanLyu Lei1He Aiguo （1.Shandong Lubi GroupCo.，Ltd.Jinan，China;2.Shandong Ironand Steel Co.，Ltd.Jinan，China）

Abstract：This paper proposes a limestone particle size clasification utilization scheme for the problems such as low output，equipment blockage caused bysintering lumps，high labor intensityandout-of-control kilnconditions when using limestone with high magnesium content （average MgO 3.2% ）and poor calcination effect from the ～ self-owned minein themechanized shaft kilndue tothe increase incoalratioandthe extensionofcalcination time：The O-4cm crushedstone isused in the clinker production line，and the4-6cmand 6-9cm particle sizes areused for the sintering ash inthe shaft kiln calcination.Practice shows that this scheme achieves 100% comprehensive utilization of mine resources，saves 33.6oO yuan in limestone procurement costs per kiln perday，reduces the number of kiln shutdowns from8-1O times per month to 2-3 times，and increases thequalified rateof ash output quality from 75 % -80%to 90 % 1 （204 95% ， providing an engineering solution for the eficient utilization of low-grade limestone.

KeyWords： mechanized shaft kiln; limestone; particle size clasification; magnesium content; comprehensiveutilization of resources

1概述

1.1行业背景与生产挑战在建材与冶金工业领域，机械化竖窑的石灰煅烧效率与原料品质密切相关。（剩余3121字）