CN108083809A - 一种冶金用阀门阀芯及内衬的制备方法 - Google Patents

一种冶金用阀门阀芯及内衬的制备方法 Download PDF

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CN108083809A
CN108083809A CN201711315345.6A CN201711315345A CN108083809A CN 108083809 A CN108083809 A CN 108083809A CN 201711315345 A CN201711315345 A CN 201711315345A CN 108083809 A CN108083809 A CN 108083809A
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曹大力
付海波
田林
杨妮
张挽
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Shenyang University of Chemical Technology
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Abstract

一种冶金用阀门阀芯及内衬的制备方法，涉及一种阀门阀芯及内衬的制备方法，该方法将热压烧结致密B4C陶瓷、B4C‑SiC陶瓷、B4C‑SiC‑环氧树脂陶瓷基复合材料、B4C‑酚醛树脂陶瓷基复合材料、B4C‑SiC‑酚醛树脂陶瓷基复合材料和B4C‑SiC‑聚四氟乙烯陶瓷基复合材料作为加压湿法冶金用阀门的阀芯；热压烧结致密B4C陶瓷的体积密度大于2.48g/cm3、致密度大于98.0%；B4C‑SiC陶瓷的体积密度大于2.50g/cm3、致密度大于98.0%。本发明将B4C陶瓷及B4C‑SiC陶瓷基复合材料作为加压湿法冶金用阀门的阀芯及内衬，解决我国加压湿法冶金生产中普遍存在的金属阀门腐蚀严重问题。

Description

一种冶金用阀门阀芯及内衬的制备方法
技术领域
本发明涉及一种阀门阀芯及内衬的制备方法，特别是涉及一种冶金用阀门阀芯及内衬的制备方法。
背景技术
我国是有色金属资源和生产大国，但随着我国有色金属产业的快速发展，资源的消耗量也逐渐增加，目前优质资源保障程度下降，企业不得不利用共伴生资源及难选冶资源。而加压湿法冶金工艺技术特别适于处理复杂、共伴生和难选冶有色金属资源，实现资源的综合利用。
近年来，我国加压湿法冶金技术取得了长足进步，但与国际先进水平相比，整体上尚存在较大差距。特别是实现产业化的工程技术方面，包括核心装备的制造、关键附属设备的研发、苛刻工况下过程设备的防腐、工艺过程的自动化控制***技术等尚需进一步提升。
目前我国加压湿法冶金生产中普遍使用金属阀门，金属阀门虽然经过多次结构及材料的改进，但受金属材料自身条件的限制，越来越不能适应高磨损、强腐蚀等恶劣工况的需要。主要体现在使用寿命短，泄露严重大大影响了***运行的稳定性，金属阀门急需从材料、设计及制造工艺等方面的彻底革新。
发明内容
本发明的目的在于提供一种冶金用阀门阀芯及内衬的制备方法，本发明利用B4C陶瓷及其复合材料作为加压湿法冶金用阀门的阀芯及内衬，解决我国加压湿法冶金生产中普遍使用金属阀门腐蚀严重的问题。
本发明的目的是通过以下技术方案实现的：
一种冶金用阀门阀芯及内衬的制备方法，所述方法包括以下制备过程：
将热压烧结致密B4C陶瓷、B4C-SiC陶瓷、B4C-SiC-环氧树脂陶瓷基复合材料、B4C-酚醛树脂陶瓷基复合材料、B4C-SiC-酚醛树脂陶瓷基复合材料和B4C-SiC-聚四氟乙烯陶瓷基复合材料作为加压湿法冶金用阀门的阀芯；热压烧结致密B4C陶瓷的体积密度大于2.48g/cm3、致密度大于98.0%；B4C-SiC陶瓷的体积密度大于2.50g/cm3、致密度大于98.0%。
所述的一种冶金用阀门阀芯及内衬的制备方法，所述B4C-SiC-环氧树脂陶瓷基复合材料是由体积密度大于2.45g/cm3、致密度大于90.0%的B4C-SiC陶瓷基体，在环氧树脂浸渍1天后，在陶瓷表面浸环氧树脂的固化剂制备的。
所述的一种冶金用阀门阀芯及内衬的制备方法，所述B4C-酚醛树脂陶瓷基复合材料是由体积密度大于2.45g/cm3、致密度大于90.0%的B4C陶瓷基体，在酚醛树脂浸渍1天后，将其在150-250℃下保温1-36小时制备的。
所述的一种冶金用阀门阀芯及内衬的制备方法，所述B4C-SiC-聚四氟乙烯基复合材料是由体积密度大于2.45g/cm3、致密度大于90.0%的B4C-SiC陶瓷基体，在聚四氟乙烯分散液中浸渍1天后，将其在250-450℃下保温0.5-36小时制备的。
具体实施方式
下面结合实施例对本发明进行详细说明。
实施例1
将热压烧结致密体积密度大于2.48g/cm3、致密度大于98.0%的B4C陶瓷和体积密度大于2.50g/cm3、致密度大于98.0%的B4C-SiC陶瓷放置到液固比3.1-4:1，始酸（硫酸）浓度120-140g/L，釜内压力0.4-0.6MPa，温度110-130℃，粒度-0.074mm占95%以上，反应时间时间为60min高硅氧化铅锌矿加压酸浸的阀体工作条件下，研究发现：Zn浸出率>97.0%，Si浸出率<1.0%，Fe浸出率<6.0%，加压酸浸工艺具有矿浆过滤性能良好，经过100实验的高致密B4C陶瓷及B4C-SiC陶瓷几乎没有产生任何变化而且没有硫酸及矿浆的泄露。
实施例2
将体积密度大于2.45g/cm3、致密度大于90.0%的B4C-SiC陶瓷基体，在环氧树脂浸渍1天后，将其浸渍在固化剂制备出B4C-SiC陶瓷-环氧树脂复合材料。然后将B4C-SiC陶瓷-环氧树脂复合材料放到液固比3.1-4:1、始酸（硫酸）浓度120-140g/L、釜内压力0.4-0.6MPa、温度110-130℃、粒度-0.074mm占95%以上、反应为时间60min的高硅氧化铅锌矿加压酸浸卸料阀的阀体内衬的工作条件下，结果表明：Zn浸出率>97.0%，Si浸出率<1.0%，Fe浸出率<6.0%，加压酸浸工艺具有矿浆过滤性能良好，经过工作100次的 B4C-SiC-环氧树脂陶瓷基复合材料几乎没有任何腐蚀和磨蚀而且没有任何硫酸及矿浆的泄露。
实施例3
将体积密度大于2.45g/cm3、致密度大于90.0%的B4C-陶瓷基体，在酚醛树脂浸渍1天后，将其在150-250℃下保温1-36小时制备出B4C-SiC-酚醛树脂复合陶瓷。
将B4C-酚醛树脂复合陶瓷放置到粒度小于75μm 的辉钼精矿，试验温度为200 ℃、氧分压为700 kPa、硝酸钠与辉钼精矿质量比为1：50、反应时间为3 h的辉钼矿加氧浸出的卸料阀的阀体内衬的工作条件下，发现辉钼精矿的氧化率大于99.0%，其中，90%左右的钼转化为合格的工业氧化钼，经过工作100次的B4C-SiC-酚醛树脂陶瓷基复合材料作为阀体内衬几乎没有任何腐蚀和磨蚀而且没有任何硫酸及矿浆的泄露。
实施例4
将体积密度大于2.45g/cm3、致密度大于90.0%的B4C-SiC陶瓷基体，在聚四氟乙烯分散液中浸渍1天后，将其在250-450℃下保温0.5-36小时制备出B4C-SiC-聚四氟乙烯陶瓷基复合材料。
将B4C-SiC-聚四氟乙烯陶瓷基复合材料加入到苛性钠含量为17.1g/L，磷酸钠加入量为1.0 g/L，浸出温度160℃，液固比3/1，浸出时间3h的氢氧化钠-磷酸钠高压浸出处理黑白混合钨中矿的卸料阀的阀体内衬的工作条件下。研究发现钨的平均浸出率为98.0％，经过工作4个月的B4C-SiC-聚四氟乙烯陶瓷基复合材料几乎没有任何腐蚀和磨蚀而且没有任何硫酸及矿浆的泄露。
实施例5
将体积密度大于2.45g/cm3、致密度大于90.0%的B4C-SiC陶瓷基体，在酚醛树脂浸渍1天后，将其在150-250℃下保温1-36小时制备出B4C-SiC-酚醛树脂复合陶瓷。
将B4C-SiC-酚醛树脂复合陶瓷放置到粒度小于75μm 的辉钼精矿，试验温度为200℃、氧分压为700 kPa、硝酸钠与辉钼精矿质量比为1：50、反应时间为3 h的辉钼矿加氧浸出的卸料阀的阀体内衬的工作条件下，发现辉钼精矿的氧化率大于99.0%，其中，90%左右的钼转化为合格的工业氧化钼，经过工作100次的B4C-SiC-酚醛树脂陶瓷基复合材料作为阀体内衬几乎没有任何腐蚀和磨蚀而且没有任何硫酸及矿浆的泄露。

Claims (4)

1.一种冶金用阀门阀芯及内衬的制备方法，其特征在于，所述方法包括以下制备过程：
将热压烧结致密B4C陶瓷、B4C-SiC陶瓷、B4C-SiC-环氧树脂陶瓷基复合材料、B4C-酚醛树脂陶瓷基复合材料、B4C-SiC-酚醛树脂陶瓷基复合材料和B4C-SiC-聚四氟乙烯陶瓷基复合材料作为加压湿法冶金用阀门的阀芯；热压烧结致密B4C陶瓷的体积密度大于2.48g/cm3、致密度大于98.0%；B4C-SiC陶瓷的体积密度大于2.50g/cm3、致密度大于98.0%。
2.根据权利要求1所述的一种冶金用阀门阀芯及内衬的制备方法，其特征在于，所述B4C-SiC-环氧树脂陶瓷基复合材料是由体积密度大于2.45g/cm3、致密度大于90.0%的B4C-SiC陶瓷基体，在环氧树脂浸渍1天后，在陶瓷表面浸环氧树脂的固化剂制备的。
3.根据权利要求1所述的一种冶金用阀门阀芯及内衬的制备方法，其特征在于，所述B4C-酚醛树脂陶瓷基复合材料是由体积密度大于2.45g/cm3、致密度大于90.0%的B4C陶瓷基体，在酚醛树脂浸渍1天后，将其在150-250℃下保温1-36小时制备的。
4.根据权利要求1所述的一种冶金用阀门阀芯及内衬的制备方法，其特征在于，所述B4C-SiC-聚四氟乙烯基复合材料是由体积密度大于2.45g/cm3、致密度大于90.0%的B4C-SiC陶瓷基体，在聚四氟乙烯分散液中浸渍1天后，将其在250-450℃下保温0.5-36小时制备的。
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Application publication date: 20180529