The invention relates to a production process of agricultural potassium nitrate fertilizer, which belongs to the technical field of agricultural potassium nitrate fertilizer production. The invention comprises the following steps: a. First, water is added into the dissolution tank, industrial potassium carbonate or potassium sulfate is poured into it, stirring dissolution is opened, potassium carbonate or potassium sulfate is mixed into a saturated solution and pumped into the potassium nitrate reaction tank; B. Secondly, wet calcium nitrate crystal is measured and then added to the potass In the tank, potassium nitrate reaction liquid is obtained by mixing and stirring the solution obtained in step a to carry out double decomposition reaction; C. Finally, potassium nitrate crystal is precipitated after crystallizing the potassium nitrate reaction liquid obtained in step B. The present invention solves the problem of treating calcium nitrate, a by-product of nitrate phosphate fertilizer industry, and produces high-quality and high-concentration potassium nitrate fertilizer without producing wastes that are difficult to treat in the process.
【技术实现步骤摘要】
一种农用硝酸钾肥料生产工艺
本专利技术涉及一种硝酸钾的制备方法,特别涉及一种农用硝酸钾肥料生产工艺,属于农用硝酸钾肥料生产
技术介绍
硝硝酸钾是一种重要的无机化工产品,根据其用途,硝酸钾主要分为工业硝酸钾与农业用硝酸钾,硝酸钾主要采用硝酸盐与氯化钾转化法来制取,典型的生产工艺有硝酸钠与氯化钾复分解法,硝酸与氯化钾转化法,硝酸铵与氯化钾离子交换法,以及硝酸铵与氯化钾复分解法,由于硝酸铵与氯化钾复分解法生产硝酸钾原料来源广,付产品氯化铵使用价值大,目前,国内主要采用硝酸铵与氯化钾复分解法生产硝酸钾,并公布了多项中国专利技术专利,如中国专利技术专利200910115890X《复分解法生产硝酸钾的方法》、中国专利技术专利200910044146.5《复分解反应生产硝酸钾和氯化铵的方法》、中国专利技术专利200510094223.X《一种复分解法制备硝酸钾的方法》。中国专利技术专利200910115890X与中国专利技术专利200910044146.5生产硝酸钾过程中,存在二个不足:一是所得半成品硝酸钾产品需要使用清水冲洗硝酸钾晶体以溶解洗去夹带的氯化铵晶体,同时, ...
【技术保护点】
1.一种农用硝酸钾肥料生产工艺,其特征在于包括以下步骤:a.首先在溶解槽中加入100‑150kg的水,倒入30‑60kg的工业碳酸钾后,开启搅拌溶解,将碳酸钾配成饱和溶液并泵入硝酸钾反应槽;b.其次将硝酸分解磷矿生产磷肥装置的湿硝酸钙晶体计量后加入硝酸钾反应槽中,与步骤a所得的碳酸钾溶液混合、搅拌进行复分解反应,得硝酸钾反应液;c.最后将步骤b所得硝酸钾反应液经适当浓缩、冷冻结晶,析出硝酸钾晶体,固液分离、冷水洗涤晶体,获高纯硝酸钾产品;母液浓缩结晶,获副产品二水氯化钙或无水氯化钙。
【技术特征摘要】
1.一种农用硝酸钾肥料生产工艺,其特征在于包括以下步骤:a.首先在溶解槽中加入100-150kg的水,倒入30-60kg的工业碳酸钾后,开启搅拌溶解,将碳酸钾配成饱和溶液并泵入硝酸钾反应槽;b.其次将硝酸分解磷矿生产磷肥装置的湿硝酸钙晶体计量后...
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