高镁铁尾矿制备K<sub>2</sub>MgSiO<sub>4</sub>型矿物肥及缓释性能

高镁铁尾矿制备K₂MgSiO₄型矿物肥及缓释性能

摘要: 以河北涞源地区高镁铁尾矿为原料，利用固相烧结法制备以枸溶性K₂MgSiO₄矿物为主要组成的矿物肥，并进一步探究溶出释放特性及模拟缓释性能。在水、20 g/L柠檬酸和0.5 mol/L HCl中制备的样品K、Mg、Si溶出效率明显提高，84 d缓释实验，制备样品在水、20 g/L柠檬酸和0.5 mol/L盐酸中K累计释放量达到33.75%、73.84%及93.81%，Si累计释放量达26.05%、56.13%及83.09%，Mg累计释放量达2.00%、45.01%及72.04%。其主要营养元素能够良好释放和缓释，表明其能成为一种性能优良的矿物肥。

Abstract: In this study, K₂MgSiO₄ mineral fertilizer were prepared by solid-phase sintering method with the high magnesium iron tailings from Laiyuan Area, Hebei Province. The dissolution release characteristics and simulated sustained-release performance of K₂MgSiO₄ mineral fertilizer were further investigated.The dissolution efficiency of K, Mg and Si prepared in water, 20 g/L citric acid and 0.5 mol/L HCl was significantly improved. The cumulative release amounts of K and Si in water, 20 g/L citric acid and 0.5 mol/L HCl reached 33.75%, 73.84% and 93.81%, 26.05%, 56.13% and 83.09%, 2.00%, 45.01% and 72.04%, respectively. The main nutrient elements can be released well and slowly, indicating that it can become a mineral fertilizer with excellent properties.