化学合成法生产饲料添加剂一水硫酸镁提纯工艺研究  

Research on Chemical Synthesis Method and Centrifugal Separation Technology for Production of Feed Additive Monohydrate Magnesium Sulfate

作　　者：杨云洪 李晓燕 田晓美 李长龙 王新 沈洁 YANG Yun-hong LI Xiao-yan TIAN Xiao-mei LI Chang-long WANG Xin SHEN Jie(Yingkou Magnesite Chemical Ind Group Co.,Ltd.,Yingkou 118100,China)

机构地区：[1]营口菱镁化工集团有限公司,辽宁营口115100

出　　处：《畜牧与饲料科学》2017年第6期35-38,共4页Animal Husbandry and Feed Science

基　　金：辽宁省科技型中小企业技术创新基金项目"饲料添加剂一水硫酸镁技术研发与产业化"[辽科发(2014)33号]

摘　　要：为确定饲料添加剂一水硫酸镁最佳的合成与分离条件,以氧化镁粉和硫酸为原料,通过化学合成法和离心分离技术生产饲料添加剂一水硫酸镁,分别采用X射线衍射(XRD)和Carr指数法对样品纯度及流动特性进行测试。结果表明,最佳化学合成条件为:硫酸浓度62%~67%,氧化镁质量45~60 g,反应料浆温度120℃,固化时间5 min,熟化时间25 min,氧化镁粉细度0.150 mm;最佳离心分离条件为:离心机转速140 r/min,离心分离时间1.5 h,料浆温度60℃,在该条件下,样品中SiO_2杂质含量最低,为0.8%;X射线衍射图谱显示样品中仅含一水硫酸镁单一组分;Carr指数法分析表明产品流动性较好。综上提示,利用化学合成法生产的一水硫酸镁产品具有杂质含量低、纯度高、流动性好等优点。This study was conducted to investigate the optimum synthesis and separation conditions for production of feed additive monohydrate magnesium sulfate. Monohydrate magnesium sulfate was produced using magnesia powder and sulfuric acid as raw materials by chemical synthesis method and centrifugal separation technology; the purity and flow characteristics of the product samples were tested by X ray diffraction （XRD） and Carr index method, respectively. The results showed that the optimum parameters of chemical synthesis method were as followed： sulfuric acid concentration 62%-67%, magnesia mass 45-60 g, slurry temperature 120 ℃, curing time 5 min, ripening time 25 min, magnesia powder fineness 0.15 mm; the optimum parameters of centrifugal separation technology were as followed： centrifuge speed 140 r/min, centrifugal time 1.5 h, slurry temperature was 60 ~C, under this condition, the lowest impurity content （0.8%） of SiO2 was obtained; X ray diffraction patterns indicated that the monohydrate magnesium sulfate was the single component in the product samples; the results of Carr index method proved that the flow characteristics of the product samples were good. The combined data suggest that the monohydrate magnesium sulfate produced by chemical synthesis method has the advantages of low impurity content, high purity and good flow characteristics.

关 键 词：化学合成法 离心分离技术 氧化镁粉 一水硫酸镁 

分 类 号：S816.7[农业科学—饲料科学]