菱镁矿石制活性MgO的修正水化活性评价法

Evaluation Methods on Corrected Hydration Activity in Preparation of Active MgO with Calcined Magnesite

水化率是菱镁矿石煅烧制备活性MgO工艺中煅烧产物MgO活性高低的重要评价指标,在煅烧产物杂质含量小于2%时可信度较高。随着优质菱镁矿石资源的日渐枯竭,为了适应高杂质菱镁矿石资源的开发,提出了修正水化率概念,并以辽宁海城某菱镁矿为原料进行了煅烧制备活性MgO工艺技术条件研究。结果表明:修正水化率指标比水化率指标更能客观、准确地反映煅烧产物中MgO的活性,这一结论与煅烧产物及其水化物的XRD、SEM分析结论吻合。

Hydration rate is a key index for evaluating the active level of MgO in preparation of active MgO with cal- cined Magnesite. But it is only suitable for the calcined product with impurity content of less than 2%. With depletion in- creasing of high-quality magnesite resources, and in order to adjust to the exploration of the high impurity of magnesite, the concept of the corrected hydration rate is proposed. Taking a magnesite ore from Liaoning Haicheng as raw material, the technical conditioning tests for the preparation of active MgO by calcination were studied. The results showed the corrected hydration rate can more objectively and accurately reflect the activity of MgO in calcine process than the hydration rate. This conclusion is coincide with the XRD,SEM analysis of the calcined product and its hydrates.