CN110961639A - 一种不同粒径的贵金属球形粉末的制备装置及制备方法 - Google Patents

一种不同粒径的贵金属球形粉末的制备装置及制备方法 Download PDF

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CN110961639A
CN110961639A CN201911100013.5A CN201911100013A CN110961639A CN 110961639 A CN110961639 A CN 110961639A CN 201911100013 A CN201911100013 A CN 201911100013A CN 110961639 A CN110961639 A CN 110961639A
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powder
chamber
noble metal
preparation
nozzle
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郝海英
于文军
户赫龙
付丰年
陈晓巍
董亭义
吕保国
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Beijing Trillion Metals Co ltd
Grikin Advanced Material Co Ltd
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Grikin Advanced Material Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0844Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid in controlled atmosphere
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/088Fluid nozzles, e.g. angle, distance
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0896Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid particle transport, separation: process and apparatus

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Abstract

本粉末公开了一种不同粒径贵金属球形粉末的制备装置及制备方法。所述装置包括雾化室和其下游的粉末分区室;所述雾化室包括熔炼室,熔炼室下方设置喷嘴和收集盘;所述粉末分区室用隔板分隔为多个区域。所述方法使用所述装置得到粒径10微米到200微米的贵金属球形粉末。

Description

一种不同粒径的贵金属球形粉末的制备装置及制备方法
技术领域
本发明属于冶金技术领域,具体涉及一种不同粒径贵金属球形粉末的制备装置及制备方法。
背景技术
随着微电子技术、表面封装技术和显示技术向小型化、集成化、智能化和多功能方面发展,微纳米级粉末的需求越来越广泛。而贵金属由于优异的物理化学性能,良好的耐腐蚀性,高电导率、热导率、稳定性,以及特有的电学、光学等性能,被应用在众多领域。球形度高,粒径分布窄的贵金属粉末的制备尤为重要。而贵金属价格昂贵,所以在实际生产中要降低损耗,提高经济效益。另外实际生产中制备出的贵金属粒度范围较宽,不太均匀,往往需要研磨后使用。如不区分粒度,会造成研磨耗能问题。不同的使用环境对贵金属的粒度要求不一样,区分粒度,有助于扩大贵金属粉末的使用范围,提高其利用率。目前实际生产中多采用过筛的方法,而贵金属价格昂贵,会沾附,损耗较大,长期使用,网孔容易堵塞。筛分流程使粉末经过容器,接触越多,损耗越大。因此,设备越简化,越适合贵金属粉末的制备。中国专利CN 208357226,使用的是过筛区分方法,如果用于贵金属粉末筛分,长期使用损耗较大。中国专利CN 109304472采用水雾化制粉,流程较为复杂,需要离心脱水及干燥设备。
发明内容
本发明提供了一种不同粒径贵金属球形粉末的制备装置及制备方法,采用雾化制粉和离心筛分相结合的方法,实现不同粒径的颗粒分离,提高了生产效率,也降低了贵金属粉末的损耗。具体技术方案如下。
一种不同粒径贵金属球形粉末的制备装置,包括雾化室6和粉末分区室14。其中雾化室6固定安装在工作台9上,粉末分区室14安装在支架11上。物料从锥形漏斗1进入熔炼室2内。启动真空系统3,抽真空,使熔炼室2内真空度为10-3~10-5Pa,充入惰性气体氩气,使压力达到0.02-0.2MPa。启动感应加热及测温系统4,使贵金属溶液达到过热度1800℃~1850℃,保温一段时间,启动高压气流系统7,高压气流系统7有6个气流喷嘴,均匀分布在雾化室的外侧。当贵金属溶液从喷嘴5喷出时,被从气流通道充入的高压气流击碎,冷却,形成球形粉末,降落至圆锥形收集盘8内。粉末由螺旋式管道10进入粉末分区室14。粉末分区室14用隔板15,16分成三个区域,不同直径的粉末降落在粉末分区室14的不同位置,即,一级收集区17,二级收集区18,三级收集区19。由气流带走的少量粉末被滞留在出气阀13的滤网上,此滤网可拆卸。另外,增加隔板的数量可以实现更多级别的粉末筛分。
本发明还包括制备不同粒径贵金属球形粉末的方法,其包括以下步骤:
1)将贵金属颗粒投入熔炼室,抽真空后充入惰性气体;
2)启动感应加热及测温系统,使贵金属颗粒熔化,从喷嘴喷出;
3)高压气流将喷出的金属液滴击碎,冷却,形成球形粉末,
4)球形粉末通过螺旋式管道进入粉末分区室;
5)使用高压气流将进入的粉末落在粉末分区室的不同位置。
本发明的有益效果:本发明将贵金属熔炼、气雾化制粉与气流筛分结合起来,流程简单,制备的球形粉末粒径为10微米到200微米,并且可以实行粒径范围内多级分区收集。本发明可以制备多种贵金属球形粉末,如,Au粉,银粉,铂粉,钯粉等。
附图说明
图1是本发明不同粒径贵金属球形粉末制备装置的结构示意图。
其中:1圆锥形进料口,2熔炼室,3真空系统,4感应加热及测温系统,5喷嘴,6雾化室,7高压气流系统,8锥形收集盘,9工作台,10螺旋式管道,11支架,12高压气流,13带过滤网的出气阀,14粉末分区室,15一级隔板,16二级隔板,17一级收集区,18二级收集区,19三级收集区。
具体实施方式
下面结合附图和实施例对本发明进一步详细说明。
实施例1,
选取平均直径2mm左右的不规则海绵铂颗粒,从圆锥形进料口1加入,至熔炼室2内。启动真空系统3抽真空,真空度保持10-3~10-5Pa,充入氩气,使压力达到0.02-0.2MPa。启动感应加热及测温系统4,待温度达到1800℃~1850℃。通入高压气流12,使喷嘴5下落的金属液滴雾化、冷却,形成粉末。粉末降落至锥形收集盘8,由螺旋形管道10进入圆筒型粉末分区室14内,经过气流的作用,完成不同直径的粉末分区。
上述实施例对本发明的技术方案进行了详细说明。显然,本发明并不局限于所描述的实施例。基于本发明中的实施例,熟悉本技术领域的人员还可据此做出多种变化,但任何与本发明等同或相类似的变化都属于本发明保护的范围。

Claims (10)

1.一种不同粒径贵金属球形粉末的制备装置,其特征在于,包括雾化室和其下游的粉末分区室;所述雾化室包括熔炼室,熔炼室下方设置喷嘴和收集盘;所述粉末分区室用隔板分隔为多个区域。
2.根据权利要求1所述的装置,其特征在于,所述熔炼室带有感应加热及测温系统和喷嘴。
3.根据权利要求1所述的装置,其特征在于,所述熔炼室下方设置雾化室,雾化室内由高压气流系统充入高压气流。
4.根据权利要求1所述的装置,其特征在于,所述雾化室和粉末分区室通过螺旋式管道连接。
5.根据权利要求1所述的装置,其特征在于,所述粉末分区室设置带过滤网的出气阀。
6.使用权利要求1所述装置制备不同粒径贵金属球形粉末的方法,其特征在于,包括以下步骤:
1)将贵金属颗粒投入熔炼室,抽真空后充入惰性气体;
2)启动感应加热及测温系统,使贵金属颗粒熔化,从喷嘴喷出;
3)高压气流将喷出的金属液滴击碎,冷却,形成球形粉末,
4)球形粉末通过螺旋式管道进入粉末分区室;
5)使用高压气流将进入的粉末落在粉末分区室的不同位置。
7.根据权利要求6所述的方法,其特征在于,步骤1)中所述的抽真空,真空度保持10-3~10-5Pa。
8.根据权利要求6所述的方法,其特征在于,步骤1)中所述的惰性气体是氩气,使压力达到0.02-0.2MPa。
9.根据权利要求6所述的方法,其特征在于,步骤2)所述的加热,温度达到1800℃~1850℃。
10.根据权利要求6所述的方法,其特征在于,步骤5)得到的粉末粒径为10微米到200微米。
CN201911100013.5A 2019-11-12 2019-11-12 一种不同粒径的贵金属球形粉末的制备装置及制备方法 Pending CN110961639A (zh)

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CN114515834A (zh) * 2022-02-18 2022-05-20 河南省远洋粉体科技股份有限公司 一种铝粉进行雾化处理的雾化喷头供料装置
CN114589310A (zh) * 2022-03-11 2022-06-07 晶高优材(北京)科技有限公司 一种微米球形银粉制备方法
CN115446321A (zh) * 2021-06-08 2022-12-09 重庆国际复合材料股份有限公司 一种3d打印合金粉体制备方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115446321A (zh) * 2021-06-08 2022-12-09 重庆国际复合材料股份有限公司 一种3d打印合金粉体制备方法
CN114515834A (zh) * 2022-02-18 2022-05-20 河南省远洋粉体科技股份有限公司 一种铝粉进行雾化处理的雾化喷头供料装置
CN114515834B (zh) * 2022-02-18 2023-01-17 河南省远洋粉体科技股份有限公司 一种铝粉进行雾化处理的雾化喷头供料装置
CN114589310A (zh) * 2022-03-11 2022-06-07 晶高优材(北京)科技有限公司 一种微米球形银粉制备方法

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