一种低品位硼镁铁矿制备偏硼酸钠联产过硼酸钠的方法

摘要：本发明公开一种低品位硼镁铁矿制备偏硼酸钠联产过硼酸钠的方法，步骤如下：(1)、经过选矿工艺获得硼精粉；(2)、按质量比为氢氧化钠：硼精粉：水＝1:1‑1.2:3‑4加入氢氧化钠和水；(3)、硼精粉在0.5‑0.6mpa压力下，155‑160℃碱解，反应时间2小时；得偏硼酸钠溶液；(4)、反应后，板框过滤，结晶液进入结晶罐；板框过滤，滤液回到结晶罐；(5)、在滤液中加入活性炭，滤液经由换热器换热冷却，送至过硼酸钠制备工艺中的配料罐；(6)、过硼酸钠制备工艺：最后，按比例在过硼酸钠产品结晶后混料，其目的是提高产品稳定性。本发明的优点在于缩短整体生产流程，节省大量成本。产品杂质去除较彻底，与通常工艺相比，低品位硼镁铁矿综合利用率提高。
Abstract： The invention discloses a method for preparing sodium metaborate with a sodium perborate byproduct from low-grade ludwigite. The method comprises the following steps: (1) boron ore concentrate powderis obtained through a mineral processing process; (2) sodium hydroxide and water are added according to the mass ratio of the sodium hydroxide to the boron ore concentrate powder to the water of 1:(1-1.2):(3-4); (3) alkaline hydrolysis is performed on the boron ore concentrate powder at the pressure of 0.5-0.6 MPa and the temperature of 155-160 DEG C, a reaction is performed for 2 h, and thereforea sodium metaborate solution is obtained; (4) after the reaction is completed, plate frame filtration is performed, and a crystallization liquid enters a crystallization tank; and plate frame filtration is performed, and a filtrate returns to the crystallization tank; (5) activated carbon is added into the filtrate, the filtrate is subjected to heat exchange and cooling through a heat exchanger,and the obtained filtrate is sent to a material preparing tank in the preparation process of the sodium perborate; and (6) a preparation process of the sodium perborate is performed: finally, materials are mixed according to a ratio after the sodium perborate product is crystallized so to improve the product stability. The method provided by the invention has the advantages of shortening an overall production process and saving a large amount of costs; and impurity removal of the product is more thorough, and the comprehensive utilization rate of the low-grade ludwigite is improved compared with a usual process.
申请人： 辽宁首钢硼铁有限责任公司
Applicant：
地址： 118103 辽宁省丹东市凤城市********(隐藏)
发明(设计)人： 代英秋 籍延广 况盛阳 周弘强
Inventor：
主分类号： C01B35/12(20060101)
分类号： C01B35/12(20060101)