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A platform for research: civil engineering, architecture and urbanism
Comprehensive utilization method for high-iron high-calcium high-silicon waste magnesite and boron mud
The invention discloses a comprehensive utilization method of high-iron high-calcium high-silicon waste magnesite and boron mud, which comprises the following steps: calcining waste magnesite in a rotary kiln, pulverizing light calcined magnesia powder, and leaching iron and calcium with an oxalic acid and glycerol alcohol solution to obtain calcium oxalate and complex iron oxalate; and adding magnesium sulfate and boric sludge, and carrying out stirring to prepare a magnesium building material product. According to the invention, high-iron high-calcium high-silicon waste magnesite and boron mud are used as raw materials, iron and calcium impurities are leached out through oxalic acid, glycerol alcohol and oxalic acid are subjected to graft polymerization under the hydration heat release condition of magnesium oxysulfate cement, hydroxyl in a formed polymer reacts with boron to solidify boron, then the boron is further solidified through a magnesian cementing material, secondary utilization of solid waste is achieved, and the method is environmentally friendly. The preparation method is simple, the light calcined magnesia powder prepared by using the rotary kiln is small in grain size, high in activity, relatively low in cost, safe, non-toxic, low in leaching harmful impurities and large in dosage, and is used for building material products, and the prepared building material product is relatively high in whiteness and good in performance.
本发明公开了一种高铁高钙高硅废弃菱镁矿与硼泥综合利用的方法，包括：回转窑煅烧废弃菱镁矿，粉碎轻烧氧化镁粉，草酸，甘油醇溶液浸出铁和钙，得到草酸钙和络合草酸铁；加入硫酸镁和硼泥进行搅拌，制备镁建材制品。本发明使用高铁高钙高硅废弃菱镁矿与硼泥作为原料，经草酸浸出铁和钙杂质，在硫氧镁水泥水化放热条件下，甘油醇与草酸发生接枝聚合，形成的多聚物中羟基与硼发生反应从而固化硼，再经镁质胶凝材料进一步固化，实现固废的二次利用，绿色环保。本发明制备方法简单，使用回转窑制备出的轻烧氧化镁粉晶粒尺寸小，活性高，成本较低，安全无毒，浸出有害杂质低，且用于建材制品，用量大，制备的建材制品白度较高，性能良好。
Comprehensive utilization method for high-iron high-calcium high-silicon waste magnesite and boron mud
The invention discloses a comprehensive utilization method of high-iron high-calcium high-silicon waste magnesite and boron mud, which comprises the following steps: calcining waste magnesite in a rotary kiln, pulverizing light calcined magnesia powder, and leaching iron and calcium with an oxalic acid and glycerol alcohol solution to obtain calcium oxalate and complex iron oxalate; and adding magnesium sulfate and boric sludge, and carrying out stirring to prepare a magnesium building material product. According to the invention, high-iron high-calcium high-silicon waste magnesite and boron mud are used as raw materials, iron and calcium impurities are leached out through oxalic acid, glycerol alcohol and oxalic acid are subjected to graft polymerization under the hydration heat release condition of magnesium oxysulfate cement, hydroxyl in a formed polymer reacts with boron to solidify boron, then the boron is further solidified through a magnesian cementing material, secondary utilization of solid waste is achieved, and the method is environmentally friendly. The preparation method is simple, the light calcined magnesia powder prepared by using the rotary kiln is small in grain size, high in activity, relatively low in cost, safe, non-toxic, low in leaching harmful impurities and large in dosage, and is used for building material products, and the prepared building material product is relatively high in whiteness and good in performance.
本发明公开了一种高铁高钙高硅废弃菱镁矿与硼泥综合利用的方法，包括：回转窑煅烧废弃菱镁矿，粉碎轻烧氧化镁粉，草酸，甘油醇溶液浸出铁和钙，得到草酸钙和络合草酸铁；加入硫酸镁和硼泥进行搅拌，制备镁建材制品。本发明使用高铁高钙高硅废弃菱镁矿与硼泥作为原料，经草酸浸出铁和钙杂质，在硫氧镁水泥水化放热条件下，甘油醇与草酸发生接枝聚合，形成的多聚物中羟基与硼发生反应从而固化硼，再经镁质胶凝材料进一步固化，实现固废的二次利用，绿色环保。本发明制备方法简单，使用回转窑制备出的轻烧氧化镁粉晶粒尺寸小，活性高，成本较低，安全无毒，浸出有害杂质低，且用于建材制品，用量大，制备的建材制品白度较高，性能良好。
Comprehensive utilization method for high-iron high-calcium high-silicon waste magnesite and boron mud
一种高铁高钙高硅废弃菱镁矿与硼泥综合利用的方法
BI WANLI (author) / HU ZHIQI (author) / GUAN YAN (author) / ZHAO JIUYE (author) / SUN MEISHUO (author)
2020-05-15
Patent
Electronic Resource
Chinese
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