低品位菱镁矿闪速旋流动态煅烧生产高活性氧化镁关键技术及示范推广

高硅钙低品位菱镁矿可通过浮选工艺提纯至硅0.2%和钙0.6%以下、MgO 47.2%以上;经旋流动态煅烧生产的MgO活性达10 s,灼减量≤1%,1 t产品能耗0.17 t标准煤,污染物达标排放;菱镁资源利用、节能减排效果显著。

The high silicon calcium low grade magnesite is purified to silicon 0.2%and calcium 0.6%or less and magnesium oxide 47.2%or more by the flotation process;the activity of magnesium oxide produced by rotating-flow dynamic calcination is up to 10 s,the burning reduction is less than 1%,the energy consumption is 0.17 tons standard coal per ton of product,and the pollutant discharge is below the limit of discharge standard;the utilization of magnesite resources,energy saving and emission reduction are remarkable.