TW202224810A - Pulsed metal powder preparation and condensation method - Google Patents

Pulsed metal powder preparation and condensation method Download PDF

Info

Publication number
TW202224810A
TW202224810A TW110148449A TW110148449A TW202224810A TW 202224810 A TW202224810 A TW 202224810A TW 110148449 A TW110148449 A TW 110148449A TW 110148449 A TW110148449 A TW 110148449A TW 202224810 A TW202224810 A TW 202224810A
Authority
TW
Taiwan
Prior art keywords
metal powder
cooling chamber
pulsed
powder
collector
Prior art date
Application number
TW110148449A
Other languages
Chinese (zh)
Other versions
TWI813105B (en
Inventor
柴立新
汪豔春
Original Assignee
大陸商江蘇博遷新材料股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大陸商江蘇博遷新材料股份有限公司 filed Critical 大陸商江蘇博遷新材料股份有限公司
Publication of TW202224810A publication Critical patent/TW202224810A/en
Application granted granted Critical
Publication of TWI813105B publication Critical patent/TWI813105B/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/12—Making metallic powder or suspensions thereof using physical processes starting from gaseous material

Abstract

The invention provided herein is a pulsed metal powder preparation and condensation method. Said method includes the following steps: Step 1: putting raw materials into a reactor to melt and evaporate, so that the metal vapor enters the condenser tube to crystallize and nucleate to form powder blank; Step 2: said powder blank enters the pulse cooling chamber to cool and then form single metal particles, and the pulse cooling chamber is filled with nitrogen during pulse cooling; Step 3: single metal particles enter the collector under the action of airflow; Step 4: the back-blowing device in the collector blows the metal powder back into the powder collector for collection. The invention provided herein has the effect of significantly improving the distribution uniformity and yield of the metal powder.

Description

脈衝式金屬粉製備冷凝方法Preparation and condensation method of pulsed metal powder

本發明涉及粉末製備技術領域，特別涉及一種脈衝式金屬粉製備冷凝方法。The invention relates to the technical field of powder preparation, in particular to a method for preparing and condensing pulsed metal powder.

目前，在次微米級金屬粉末製備行業，多採用物理氣相法生產金屬鎳粉。金屬在反應器熔池內熔融、氣化後，金屬蒸汽在系統氮氣的作用下進入冷凝管，在冷凝管內通過氮冷卻，形成粉末後進入收集罐。At present, in the preparation industry of sub-micron metal powder, the physical gas phase method is mostly used to produce metal nickel powder. After the metal is melted and gasified in the molten pool of the reactor, the metal vapor enters the condenser under the action of nitrogen in the system, and is cooled by nitrogen in the condenser to form powder and then enter the collection tank.

但是目前的物理氣相法生產金屬鎳粉時，金屬蒸汽直接通過冷凝管冷凝，而冷凝管的內容積小，粉末在脈衝冷卻室內的氣固比僅為1：200至1：250，導致存在粉末濃度大、溫度高以及粉末冷卻不充分的問題。而且，由於冷凝管的截面積小，氣體在管內流速高，流態雷諾數Re≧3000，因此系統流態呈過度流和紊流狀。現有的方法獲得的金屬鎳粉因粉末過大還會導致粉末粒子之間及粒子與管壁之間碰撞機率增大，進而在高溫環境下，未冷卻的金屬粒子之間相互熔結，易形成連體，或形成不規則的異形粒子，導致粉末品質下降。However, when the current physical gas phase method is used to produce metal nickel powder, the metal vapor is directly condensed through the condenser tube, and the inner volume of the condenser tube is small, and the gas-solid ratio of the powder in the pulse cooling chamber is only 1:200 to 1:250, resulting in the existence of Problems with high powder concentration, high temperature and insufficient powder cooling. Moreover, due to the small cross-sectional area of the condenser tube, the gas flow velocity in the tube is high, and the flow state Reynolds number Re≧3000, so the system flow state is excessive flow and turbulent flow. The metal nickel powder obtained by the existing method will also increase the probability of collision between the powder particles and between the particles and the tube wall due to the excessive powder, and then in a high temperature environment, the uncooled metal particles are sintered with each other, and it is easy to form a connection. body, or the formation of irregular shaped particles, resulting in a decrease in powder quality.

有鑑於此，本發明的目的在於提供一種脈衝式金屬粉製備冷凝方法，以實現提升金屬粉末分佈均勻度與成品率的目的。其具體方案如下：In view of this, the purpose of the present invention is to provide a pulsed metal powder preparation and condensation method, so as to achieve the purpose of improving the distribution uniformity and yield of the metal powder. Its specific plan is as follows:

一種脈衝式金屬粉製備冷凝方法，所述方法包括如下步驟：A pulsed metal powder preparation and condensation method, the method comprises the following steps:

步驟1: 將原料置入反應器內熔融蒸發，使得金屬蒸汽進入冷凝管內結晶、成核，形成粉末胚料；Step 1: The raw materials are put into the reactor to melt and evaporate, so that the metal vapor enters the condenser tube for crystallization and nucleation to form powder blanks;

步驟2: 粉末胚料進入脈衝冷卻室內冷卻，形成單體金屬粒子，且脈衝冷卻時脈充冷卻室內充滿氮氣；Step 2: The powder billet is cooled in the pulse cooling chamber to form single metal particles, and the pulse cooling chamber is filled with nitrogen during the pulse cooling;

步驟3: 單體金屬粒子在氣流作用下進入收集器內收集；Step 3: Single metal particles are collected in the collector under the action of airflow;

步驟4: 收集器內的反吹裝置將金屬粉末反吹入收粉器內收集。Step 4: The back blowing device in the collector blows the metal powder back into the collector for collection.

可選的，所述脈衝冷卻室包括碟形封頭、圓柱體、觀察孔和氣體分佈器；所述氣體分佈器為環形氣體分佈器。Optionally, the pulse cooling chamber includes a dish-shaped head, a cylinder, an observation hole and a gas distributor; the gas distributor is an annular gas distributor.

可選的，所述環形氣體分佈器設置有多個等弧度分佈的氣體噴嘴，所述氣體噴嘴的開口端朝向所述冷凝管中心。Optionally, the annular gas distributor is provided with a plurality of gas nozzles distributed in equal arcs, and the open ends of the gas nozzles face the center of the condensation pipe.

可選的，所述冷凝管與脈衝冷卻室的截面積比為1：8至1：15；所述冷凝管與所述脈衝冷卻室的容積比為1：10至1：15。Optionally, the cross-sectional area ratio of the condensation tube to the pulse cooling chamber is 1:8 to 1:15; the volume ratio of the condensation tube to the pulse cooling chamber is 1:10 to 1:15.

可選的，所述金屬粉末呈球形，且粒徑小於100nm。Optionally, the metal powder is spherical, and the particle size is less than 100 nm.

可選的，所述脈衝冷卻室內呈負壓；所述反應器內的壓強為70-90kPa。Optionally, the pulse cooling chamber is under negative pressure; the pressure in the reactor is 70-90 kPa.

可選的，所述冷凝管內設置有氧化鋯內襯層。Optionally, a zirconia lining layer is provided in the condensation tube.

可選的，所述金屬粉末在所述脈衝冷卻室內的氣固比為1：1500至1：2000。Optionally, the gas-solid ratio of the metal powder in the pulse cooling chamber is 1:1500 to 1:2000.

可選的，所述冷凝管和/或所述脈衝冷卻室設置有夾層，所述夾層內具有冷卻水。Optionally, the condensation tube and/or the pulse cooling chamber are provided with an interlayer, and the interlayer has cooling water therein.

可選的，在步驟3中，單體金屬粒子通過斜管從脈衝冷卻室進入收集器內。Optionally, in step 3, the single metal particles enter the collector from the pulse cooling chamber through the inclined pipe.

通過以上方案可知，本申請提供了一種脈衝式金屬粉製備冷凝方法，該脈衝式金屬粉製備冷凝方法具有以下有益效果：It can be seen from the above solutions that the present application provides a method for preparing and condensing pulsed metal powder, and the method for preparing and condensing pulsed metal powder has the following beneficial effects:

1：通過截面積大的脈衝冷卻室的設置，使得氣體在管內流速降低，流態雷諾數Re≤3000，冷凝系統流態呈過度流和層流狀。1: Through the setting of the pulse cooling chamber with a large cross-sectional area, the flow rate of the gas in the tube is reduced, the flow state Reynolds number Re≤3000, and the flow state of the condensation system is excessive flow and laminar flow.

2：通過體積大的脈衝冷卻室的設置，有效擴大了金屬粉末的冷卻空間，降低了金屬粉末在脈衝冷卻室中的密度，進而有效降低粉末粒子之間及粒子與管壁之間碰撞機率，達到避免金屬粒子連體及避免產生不規則異形粒子的目的。2: Through the setting of the large-volume pulse cooling chamber, the cooling space of the metal powder is effectively expanded, the density of the metal powder in the pulse cooling chamber is reduced, and the collision probability between the powder particles and between the particles and the tube wall is effectively reduced. To achieve the purpose of avoiding the conjoined metal particles and the generation of irregular shaped particles.

3：通過溫度場分佈均勻的脈衝冷卻室的設置，獲得粒子分佈均勻的金屬粉末，實現超大與超細粒子少、粉末粒度分佈窄的效果。3: Through the setting of the pulse cooling chamber with uniform temperature field distribution, metal powder with uniform particle distribution can be obtained, and the effect of less super-large and ultra-fine particles and narrow powder particle size distribution can be achieved.

4：通過減小脈衝冷卻室的中心部位與室壁的溫差，使得金屬蒸汽在室壁上形成的熔渣少，廢粉少，達到提升15%的粉末成品率的目的。4: By reducing the temperature difference between the central part of the pulse cooling chamber and the chamber wall, the metal vapor forms less slag on the chamber wall, less waste powder, and achieves the purpose of increasing the powder yield by 15%.

5：具有冷凝管的內壁結渣現象少、冷凝管不易堵塞以及生產週期縮短20%的效果。5: It has the effects of less slagging on the inner wall of the condenser tube, less blockage of the condenser tube and a 20% reduction in the production cycle.

下面將結合本發明實施例中的附圖，對本發明實施例中的技術方案進行清楚、完整地描述。顯然，所描述的實施例僅僅是本發明一部分實施例，而不是全部的實施例。基於本發明中的實施例，本發明所屬技術領域中具有通常知識者所作之均等變化與修飾，皆應仍屬本發明之專利涵蓋範圍內。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, equivalent changes and modifications made by those with ordinary knowledge in the technical field to which the present invention pertains should still fall within the scope of the patent of the present invention.

以下針對本發明實施例的脈衝式金屬粉製備冷凝裝置進行具體說明：The following is a specific description of the pulsed metal powder preparation condensing device of the embodiment of the present invention:

如圖1所示，一種脈衝式金屬粉製備冷凝裝置，包括反應器1、冷凝管2、脈衝冷卻室3、收集器4以及收粉器5。其中，反應器1用於將原料熔融與蒸發，以獲得金屬蒸汽。冷凝管2連接反應器1與脈衝冷卻室3，以使得金屬蒸汽通過冷凝管2時結晶、成核，在進入脈衝冷卻室3內後，通過減緩氣體流速，致使結晶成核的粉末胚料粒子之間的間距瞬間擴大，大幅度減小各個粉末胚料粒子的碰撞機率，從而有效減少連體粒子與熔渣的產生。收集器4用於收集經由脈衝冷卻室3冷卻獲得的金屬粉末，金屬粉末在收集器4內的反吹罐反吹作用下進入收粉器5內收集。為了實現冷卻效果，冷凝管2內設置有氧化鋯內襯層，且冷凝管2和/或脈衝冷卻室3設置有夾層。夾層內具有冷卻水。As shown in FIG. 1 , a pulsed metal powder preparation condensation device includes a reactor 1 , a condensation tube 2 , a pulsed cooling chamber 3 , a collector 4 and a powder collector 5 . Among them, the reactor 1 is used for melting and evaporating raw materials to obtain metal vapor. The condenser tube 2 is connected to the reactor 1 and the pulse cooling chamber 3, so that the metal vapor crystallizes and nucleates when passing through the condenser tube 2. After entering the pulse cooling chamber 3, by slowing down the gas flow rate, the powder blank particles that crystallize and nucleate are formed. The distance between them is instantly expanded, which greatly reduces the collision probability of each powder blank particle, thereby effectively reducing the generation of conjoined particles and slag. The collector 4 is used to collect the metal powder obtained by cooling through the pulse cooling chamber 3 , and the metal powder enters the powder collector 5 under the backflushing action of the backflushing tank in the collector 4 for collection. In order to achieve the cooling effect, a zirconia lining layer is arranged in the condenser tube 2, and an interlayer is arranged in the condenser tube 2 and/or the pulse cooling chamber 3. There is cooling water in the interlayer.

需要提及的是，脈衝冷卻室3包括碟形封頭、圓柱體、觀察孔和氣體分佈器6。碟形封頭用於與冷凝管2密封連接。圓柱體用於金屬粉末的冷卻與獲得。觀察孔用於觀察圓柱體內金屬粉末的生成情況。氣體分佈器6為環形氣體分佈器，氣體分佈器6上設置有多個等弧度分佈的氣體噴嘴。氣體噴嘴的開口端朝向冷凝管2的中心，以有效減緩氣體流速並吹散粉末胚料。It should be mentioned that the pulse cooling chamber 3 includes a dish-shaped head, a cylinder, a viewing hole and a gas distributor 6 . The dish-shaped head is used for sealing connection with the condensing pipe 2 . Cylinders are used for cooling and harvesting of metal powders. The observation hole is used to observe the formation of metal powder in the cylinder. The gas distributor 6 is an annular gas distributor, and a plurality of gas nozzles with equal arc distribution are arranged on the gas distributor 6 . The open end of the gas nozzle faces the center of the condenser tube 2 to effectively slow down the gas flow rate and blow out the powder billet.

與此同時，冷凝管2與脈衝冷卻室3的截面積比為1：8至1：15，冷凝管2與脈衝冷卻室3的容積比為1：10至1：15，以大幅度減小各個粉末胚料粒子的碰撞機率，從而有效減少連體粒子與熔渣的產生。At the same time, the cross-sectional area ratio of the condenser tube 2 to the pulse cooling chamber 3 is 1:8 to 1:15, and the volume ratio of the condenser tube 2 to the pulse cooling chamber 3 is 1:10 to 1:15, so as to greatly reduce the The collision probability of each powder blank particle can effectively reduce the generation of conjoined particles and slag.

本發明提供了一種脈衝式金屬粉製備冷凝方法，通過採用由反應器1、冷凝管2、脈衝冷卻室3、收集器4以及收粉器5組成的製備冷凝裝置，以脈衝冷卻的方法獲得金屬粉末。其中：脈衝冷卻的方法包括如下步驟：The invention provides a pulsed metal powder preparation and condensation method. By adopting a preparation condensation device composed of a reactor 1, a condensation tube 2, a pulse cooling chamber 3, a collector 4 and a powder collector 5, the metal is obtained by a pulse cooling method. powder. Wherein: the method of pulse cooling includes the following steps:

步驟1： 將原料置入反應器1內熔融蒸發，使得金屬蒸汽進入冷凝管2內結晶、成核，形成粉末胚料。Step 1: The raw materials are put into the reactor 1 to melt and evaporate, so that the metal vapor enters the condenser tube 2 for crystallization and nucleation to form a powder billet.

步驟2：粉末胚料進入脈衝冷卻室3內冷卻，形成單體金屬粒子，且脈衝冷卻時脈衝冷卻室3內充滿氮氣。Step 2: The powder billet enters the pulse cooling chamber 3 for cooling to form single metal particles, and the pulse cooling chamber 3 is filled with nitrogen during pulse cooling.

步驟3: ：單體金屬粒子在脈衝式金屬粉製備冷凝裝置的氣流作用下通過斜管進入收集器4內收集。Step 3: : The single metal particles enter the collector 4 through the inclined pipe under the action of the air flow of the pulsed metal powder preparation and condensation device for collection.

步驟4：收集器4內的反吹裝置將金屬粉末反吹入收粉器5內收集。Step 4: The back-flushing device in the collector 4 back-blows the metal powder into the powder collector 5 for collection.

需要提及的是，原料為鐵、鎳、銅、錫、銀等中的一種或多種金屬，獲得的金屬粉末為鐵、鎳、銅、錫、銀等中的一種或多種金屬形成的合金粉末。金屬粉末呈球形，且粒徑小於100nm。在脈衝冷卻的過程中，脈衝冷卻室3內呈負壓，反應器1內的壓強為70-90kPa，金屬粉末在脈衝冷卻室3內的氣固比為1：1500至1：2000，以實現有效提升金屬粉末分佈均勻度與成品率的效果。It should be mentioned that the raw material is one or more metals in iron, nickel, copper, tin, silver, etc., and the obtained metal powder is an alloy powder formed by one or more metals in iron, nickel, copper, tin, silver, etc. . The metal powder is spherical and the particle size is less than 100nm. During the pulse cooling process, the pulse cooling chamber 3 is under negative pressure, the pressure in the reactor 1 is 70-90kPa, and the gas-solid ratio of the metal powder in the pulse cooling chamber 3 is 1:1500 to 1:2000, so as to achieve Effectively improve the distribution uniformity and yield of metal powder.

實施例一Example 1

如圖1所示，脈衝式金屬粉製備冷凝裝置包括反應器1、冷凝管2、脈衝冷卻室3、收集器4以及收粉器5。其中，反應器1用於將原料熔融與蒸發，以獲得金屬蒸汽。冷凝管2連接反應器1與脈衝冷卻室3，以使得金屬蒸汽通過冷凝管2時結晶、成核，在進入脈衝冷卻室3內後，通過減緩氣體流速，致使結晶成核的粉末胚料粒子之間的間距瞬間擴大，大幅度減小各個粉末胚料粒子的碰撞機率，從而有效減少連體粒子與熔渣的產生。收集器4用於收集經由脈衝冷卻室3冷卻獲得的金屬粉末，金屬粉末在收集器4內的反吹罐反吹作用下進入收粉器5內收集。為了實現冷卻效果，冷凝管2內設置有氧化鋯內襯層，且冷凝管2設置有夾層。夾層內具有冷卻水。As shown in FIG. 1 , the pulsed metal powder preparation condensation device includes a reactor 1 , a condensation tube 2 , a pulsed cooling chamber 3 , a collector 4 and a powder collector 5 . Among them, the reactor 1 is used for melting and evaporating raw materials to obtain metal vapor. The condenser tube 2 is connected to the reactor 1 and the pulse cooling chamber 3, so that the metal vapor crystallizes and nucleates when passing through the condenser tube 2. After entering the pulse cooling chamber 3, by slowing down the gas flow rate, the powder blank particles that crystallize and nucleate are formed. The distance between them is instantly expanded, which greatly reduces the collision probability of each powder blank particle, thereby effectively reducing the generation of conjoined particles and slag. The collector 4 is used to collect the metal powder obtained by cooling through the pulse cooling chamber 3 , and the metal powder enters the powder collector 5 under the backflushing action of the backflushing tank in the collector 4 for collection. In order to achieve the cooling effect, a zirconia lining layer is arranged in the condenser tube 2, and an interlayer is arranged in the condenser tube 2. There is cooling water in the interlayer.

需要提及的是，脈衝冷卻室3包括碟形封頭、圓柱體、觀察孔和氣體分佈器6。碟形封頭用於與冷凝管2密封連接。圓柱體用於金屬粉末的冷卻與獲得。觀察孔用於觀察圓柱體內金屬粉末的生成情況。氣體分佈器6為環形氣體分佈器，氣體分佈器6上設置有多個等弧度分佈的氣體噴嘴。氣體噴嘴的開口端朝向冷凝管2的中心，以有效減緩氣體流速並吹散粉末胚料。It should be mentioned that the pulse cooling chamber 3 includes a dish-shaped head, a cylinder, a viewing hole and a gas distributor 6 . The dish-shaped head is used for sealing connection with the condensing pipe 2 . Cylinders are used for cooling and harvesting of metal powders. The observation hole is used to observe the formation of metal powder in the cylinder. The gas distributor 6 is an annular gas distributor, and a plurality of gas nozzles with equal arc distribution are arranged on the gas distributor 6 . The open end of the gas nozzle faces the center of the condenser tube 2 to effectively slow down the gas flow rate and blow out the powder billet.

與此同時，冷凝管2與脈衝冷卻室3的截面積比為1：8，冷凝管2與脈衝冷卻室3的容積比為1：10，以大幅度減小各個粉末胚料粒子的碰撞機率，從而有效減少連體粒子與熔渣的產生。At the same time, the cross-sectional area ratio of the condenser tube 2 and the pulse cooling chamber 3 is 1:8, and the volume ratio of the condenser tube 2 and the pulse cooling chamber 3 is 1:10, so as to greatly reduce the collision probability of each powder blank particle , so as to effectively reduce the generation of conjoined particles and slag.

該實施例提供的脈衝式金屬粉製備冷凝方法，通過採用由反應器1、冷凝管2、脈衝冷卻室3、收集器4以及收粉器5組成的製備冷凝裝置，以脈衝冷卻的方法獲得金屬粉末。The pulsed metal powder preparation and condensation method provided in this example uses a preparation condensation device composed of a reactor 1, a condenser tube 2, a pulsed cooling chamber 3, a collector 4 and a powder collector 5 to obtain metal by a pulsed cooling method. powder.

其中，脈衝冷卻的方法包括如下步驟：Wherein, the method of pulse cooling includes the following steps:

步驟1: 將原料置入反應器1內熔融蒸發，使得金屬蒸汽進入冷凝管2內結晶、成核，形成粉末胚料。Step 1: The raw materials are put into the reactor 1 to melt and evaporate, so that the metal vapor enters the condenser tube 2 to crystallize and nucleate to form a powder billet.

步驟2: 粉末胚料進入脈衝冷卻室3內冷卻，形成單體金屬粒子，且脈衝冷卻時脈衝冷卻室3內充滿氮氣。Step 2: The powder billet enters the pulse cooling chamber 3 for cooling to form single metal particles, and the pulse cooling chamber 3 is filled with nitrogen during pulse cooling.

步驟3: 單體金屬粒子在脈衝式金屬粉製備冷凝裝置的氣流作用下通過斜管進入收集器4內收集。Step 3: The single metal particles enter the collector 4 through the inclined pipe under the action of the airflow of the pulsed metal powder preparation and condensation device for collection.

步驟4: 收集器4內的反吹裝置將金屬粉末反吹入收粉器5內收集。Step 4: The backflushing device in the collector 4 blows the metal powder back into the powder collector 5 for collection.

需要提及的是，原料為鐵、鎳、銅、錫、銀等中的一種或多種金屬，獲得的金屬粉末為鐵、鎳、銅、錫、銀等中的一種或多種金屬形成的合金粉末。金屬粉末呈球形，且粒徑小於100nm。在脈衝冷卻的過程中，脈衝冷卻室3內呈負壓，反應器1內的壓強為70kPa，金屬粉末在脈衝冷卻室3內的氣固比為1：1500，以實現有效提升金屬粉末分佈均勻度與成品率的效果。It should be mentioned that the raw material is one or more metals in iron, nickel, copper, tin, silver, etc., and the obtained metal powder is an alloy powder formed by one or more metals in iron, nickel, copper, tin, silver, etc. . The metal powder is spherical and the particle size is less than 100nm. During the pulse cooling process, the pulse cooling chamber 3 is under negative pressure, the pressure in the reactor 1 is 70kPa, and the gas-solid ratio of the metal powder in the pulse cooling chamber 3 is 1:1500, so as to effectively improve the uniform distribution of the metal powder. The effect of degree and yield.

實施例二Embodiment 2

實施例二與實施例一的區別在於，實施例二中的冷凝管2與脈衝冷卻室3的截面積比為1：12，冷凝管2與脈衝冷卻室3的容積比為1：13。The difference between the second embodiment and the first embodiment is that the cross-sectional area ratio of the condenser tube 2 to the pulse cooling chamber 3 in the second embodiment is 1:12, and the volume ratio of the condenser tube 2 to the pulse cooling chamber 3 is 1:13.

實施例三Embodiment 3

實施例三與實施例一的區別在於，實施例三中的冷凝管2與脈衝冷卻室3的截面積比為1：15，冷凝管2與脈衝冷卻室3的容積比為1：15。The difference between the third embodiment and the first embodiment is that the cross-sectional area ratio of the condenser tube 2 to the pulse cooling chamber 3 in the third embodiment is 1:15, and the volume ratio of the condenser tube 2 to the pulse cooling chamber 3 is 1:15.

實施例四Embodiment 4

實施例四與實施例一的區別在於，實施例四中的反應器1內壓強為80kPa，金屬粉末在脈衝冷卻室3內的氣固比為1：1800。The difference between Example 4 and Example 1 is that the pressure in the reactor 1 in Example 4 is 80 kPa, and the gas-solid ratio of the metal powder in the pulse cooling chamber 3 is 1:1800.

實施例五Embodiment 5

實施例五與實施例一的區別在於，實施例五中的反應器1內壓強為90kPa，金屬粉末在脈衝冷卻室3內的氣固比為1：2000。The difference between Example 5 and Example 1 is that the pressure in the reactor 1 in Example 5 is 90 kPa, and the gas-solid ratio of the metal powder in the pulse cooling chamber 3 is 1:2000.

實施例六Embodiment 6

實施例六與實施例一的區別在於，實施例六中的冷凝管2和脈衝冷卻室3均設置有夾層，夾層內具有冷卻水。The difference between the sixth embodiment and the first embodiment is that the condensation pipe 2 and the pulse cooling chamber 3 in the sixth embodiment are both provided with an interlayer, and the interlayer has cooling water.

綜上，本申請通過截面積大的脈衝冷卻室3的設置，使得氣體在管內流速降低，流態雷諾數Re≤3000，冷凝系統流態呈過度流和層流狀。通過體積大的脈衝冷卻室3的設置，有效擴大了金屬粉末的冷卻空間，降低了金屬粉末在脈衝冷卻室3中的密度，進而有效降低粉末粒子之間及粒子與管壁之間碰撞機率，達到避免金屬粒子連體與避免產生不規則異形粒子的目的。通過溫度場分佈均勻的脈衝冷卻室3的設置，獲得粒子分佈均勻的金屬粉末，實現超大與超細粒子少、粉末粒度分佈窄的效果。通過減小脈衝冷卻室3中心部位與室壁的溫差，使得金屬蒸汽在室壁上形成的熔渣少，廢粉少，達到提升15%的粉末成品率的目的。因此，具有冷凝管2的內壁結渣現象少、冷凝管2不易堵塞以及生產週期縮短20%的效果。To sum up, in the present application, by setting the pulse cooling chamber 3 with a large cross-sectional area, the flow rate of the gas in the tube is reduced, the flow state Reynolds number Re≤3000, and the flow state of the condensation system is excessive flow and laminar flow. By setting the pulse cooling chamber 3 with a large volume, the cooling space of the metal powder is effectively enlarged, the density of the metal powder in the pulse cooling chamber 3 is reduced, and the collision probability between the powder particles and between the particles and the tube wall is effectively reduced. To achieve the purpose of avoiding the conjoined metal particles and the generation of irregular shaped particles. Through the setting of the pulse cooling chamber 3 with uniform temperature field distribution, metal powder with uniform particle distribution can be obtained, and the effect of less super-large and ultra-fine particles and narrow powder particle size distribution can be realized. By reducing the temperature difference between the central part of the pulse cooling chamber 3 and the chamber wall, the metal vapor forms less slag on the chamber wall, less waste powder, and achieves the purpose of increasing the powder yield by 15%. Therefore, there is less slagging on the inner wall of the condenser pipe 2, the condenser pipe 2 is not easily blocked, and the production cycle is shortened by 20%.

本發明涉及的「第一」、 「第二」、「第三」、「第四」等(如果存在)是用於區別類似的對象，而不必用於描述特定的順序或先後次序。應該理解這樣使用的數據在適當情況下可以互換，以便這裡描述的實施例能夠以除了在這裡圖示或描述的內容以外的順序實施。此外，術語「包括」和「具有」以及他們的任何變形，意圖在於覆蓋不排他的包含，例如，包含了一系列步驟或單元的過程、方法或設備不必限於清楚地列出的那些步驟或單元，而是可包括沒有清楚地列出的或對於這些過程、方法或設備固有的其它步驟或單元。References to "first", "second", "third", "fourth", etc. (if any) in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances so that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method or apparatus comprising a series of steps or elements is not necessarily limited to those steps or elements expressly listed , but may include other steps or elements not expressly listed or inherent to these processes, methods or apparatus.

需要說明的是，在本申請中涉及「第一」、「第二」等的描述僅用於描述目的，而不能理解為指示或暗示其相對重要性或者隱含指明所指示的技術特徵的數量。由此，限定有「第一」、「第二」的特徵可以明示或者隱含地包括至少一個該特徵。另外，各個實施例之間的技術方案可以相互結合，但是必須是以本發明所屬技術領域中具有通常知識者能夠實現為基礎，當技術方案的結合出現相互矛盾或無法實現時應當認為這種技術方案的結合不存在，也不在本申請要求的保護範圍之內。It should be noted that the descriptions involving "first", "second", etc. in this application are only for the purpose of description, and should not be construed as indicating or implying their relative importance or implying the number of indicated technical features . Thus, a feature delimited with "first" and "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those with ordinary knowledge in the technical field to which the present invention belongs. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that this technology The combination of schemes does not exist and is not within the scope of protection claimed in this application.

本文中應用了具體個例對本申請的原理及實施方式進行了闡述，以上實施例的說明只是用於幫助理解本發明的方法及其核心思想；同時，對於本發明所屬技術領域中具有通常知識者，依據本發明的思想，在具體實施方式及應用範圍上均會有改變之處，綜上所述，本說明書內容不應理解為對本發明的限制。The principles and implementations of the present application are described herein using specific examples, and the descriptions of the above examples are only used to help understand the method and the core idea of the present invention; , according to the idea of the present invention, there will be changes in the specific embodiments and application scope. To sum up, the contents of this specification should not be construed as limiting the present invention.

1:反應器 2:冷凝管 3:脈衝冷卻室 4:收集器 5:收粉器 6:氣體分佈器 1: Reactor 2: Condenser pipe 3: Pulse cooling chamber 4: Collector 5: Dust collector 6: Gas distributor

為了更清楚地說明本發明實施例或現有技術中的技術方案，下面將對實施例或現有技術描述中所需要使用的附圖作簡單地介紹；顯而易見地，下面描述中的附圖僅僅是本申請的實施例，對於本領域普通技術人員來講，在不付出創造性勞動的前提下，還可以根據提供的附圖獲得其他的附圖。In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art; obviously, the drawings in the following description are only the For the embodiments of the application, for those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without any creative effort.

圖1為本發明的脈衝式金屬粉製備冷凝裝置的實施例的結構示意圖。FIG. 1 is a schematic structural diagram of an embodiment of the pulsed metal powder preparation condensing device of the present invention.

無。none.

1:反應器 1: Reactor

2:冷凝管 2: Condenser pipe

3:脈衝冷卻室 3: Pulse cooling chamber

4:收集器 4: Collector

5:收粉器 5: Dust collector

6:氣體分佈器 6: Gas distributor

Claims (10)

一種脈衝式金屬粉製備冷凝方法，其包括如下步驟： 步驟1：將一原料置入一反應器內熔融蒸發，使得金屬蒸汽進入一冷凝管內結晶、成核，並形成一粉末胚料； 步驟2：該粉末胚料進入一脈衝冷卻室內冷卻，形成一單體金屬粒子，且脈衝冷卻時該脈衝冷卻室內充滿氮氣； 步驟3： 該單體金屬粒子在氣流作用下進入一收集器內收集； 步驟4：該收集器內的一反吹裝置將一金屬粉末反吹入一收粉器內收集。 A method for preparing and condensing pulsed metal powder, which comprises the following steps: Step 1: put a raw material into a reactor to melt and evaporate, so that the metal vapor enters a condenser tube for crystallization and nucleation, and forms a powder blank; Step 2: the powder blank is cooled in a pulse cooling chamber to form a single metal particle, and the pulse cooling chamber is filled with nitrogen during pulse cooling; Step 3: The single metal particles are collected in a collector under the action of airflow; Step 4: A backflushing device in the collector blows a metal powder back into a powder collector for collection. 如請求項1所述之脈衝式金屬粉製備冷凝方法，其中該脈衝冷卻室包括一碟形封頭、一圓柱體、一觀察孔和一氣體分佈器，該氣體分佈器為一環形氣體分佈器。The pulsed metal powder preparation and condensation method according to claim 1, wherein the pulsed cooling chamber comprises a dish-shaped head, a cylinder, an observation hole and a gas distributor, and the gas distributor is an annular gas distributor . 如請求項2所述之脈衝式金屬粉製備冷凝方法，其中該環形氣體分佈器設置有複數等弧度分佈的氣體噴嘴，該氣體噴嘴的開口端朝向該冷凝管中心。The pulsed metal powder preparation and condensation method as claimed in claim 2, wherein the annular gas distributor is provided with a plurality of gas nozzles with equal arc distribution, and the open end of the gas nozzles faces the center of the condensation pipe. 如請求項1所述之脈衝式金屬粉製備冷凝方法，其中該冷凝管與脈衝冷卻室的截面積比為1：8至1：15，而該冷凝管與該脈衝冷卻室的容積比為1：10至1：15。The pulsed metal powder preparation and condensation method according to claim 1, wherein the cross-sectional area ratio of the condensation pipe to the pulse cooling chamber is 1:8 to 1:15, and the volume ratio of the condensation pipe to the pulse cooling chamber is 1 : 10 to 1:15. 如請求項1所述之脈衝式金屬粉製備冷凝方法，其中該金屬粉末呈球形，且粒徑小於100nm。The method for preparing and condensing pulsed metal powder according to claim 1, wherein the metal powder is spherical and the particle size is less than 100 nm. 如請求項1所述之脈衝式金屬粉製備冷凝方法，其中該脈衝冷卻室內呈負壓，該反應器內壓強為70-90kPa。The pulsed metal powder preparation and condensation method according to claim 1, wherein the pulsed cooling chamber is under negative pressure, and the pressure in the reactor is 70-90 kPa. 如請求項1所述之脈衝式金屬粉製備冷凝方法，其中該冷凝管內設置有一氧化鋯內襯層。The method for preparing and condensing pulsed metal powder according to claim 1, wherein a zirconia lining layer is arranged in the condensing tube. 如請求項1所述之脈衝式金屬粉製備冷凝方法，其中該金屬粉末於該脈衝冷卻室內的氣固比為1: 1500至1:2000。The method for preparing and condensing pulsed metal powder according to claim 1, wherein the gas-solid ratio of the metal powder in the pulsed cooling chamber is 1:1500 to 1:2000. 如請求項1所述之脈衝式金屬粉製備冷凝方法，其中該冷凝管及/或該脈衝冷卻室設置有一夾層，該夾層內具有冷卻水。The method for preparing and condensing pulsed metal powder according to claim 1, wherein the condensation pipe and/or the pulse cooling chamber is provided with an interlayer, and the interlayer has cooling water. 如請求項1所述之脈衝式金屬粉製備冷凝方法，其中，在步驟3中，該單體金屬粒子通過一斜管從該脈衝冷卻室進入該收集器內。The method for preparing and condensing pulsed metal powder according to claim 1, wherein, in step 3, the single metal particles enter the collector from the pulse cooling chamber through an inclined pipe.
TW110148449A 2020-12-29 2021-12-23 Pulsed metal powder preparation and condensation method TWI813105B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011602571.4A CN112846206A (en) 2020-12-29 2020-12-29 Pulse type metal powder preparation condensation method
CN202011602571.4 2020-12-29

Publications (2)

Publication Number Publication Date
TW202224810A true TW202224810A (en) 2022-07-01
TWI813105B TWI813105B (en) 2023-08-21

Family

ID=75998295

Family Applications (1)

Application Number Title Priority Date Filing Date
TW110148449A TWI813105B (en) 2020-12-29 2021-12-23 Pulsed metal powder preparation and condensation method

Country Status (4)

Country Link
JP (1) JP2023550716A (en)
CN (1) CN112846206A (en)
TW (1) TWI813105B (en)
WO (1) WO2022142527A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112846206A (en) * 2020-12-29 2021-05-28 江苏博迁新材料股份有限公司 Pulse type metal powder preparation condensation method
CN115383124A (en) * 2022-09-02 2022-11-25 杭州新川新材料有限公司 Cooling equipment for superfine metal powder
CN115770882A (en) * 2022-11-02 2023-03-10 杭州新川新材料有限公司 Method and device for manufacturing superfine spherical metal powder

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2896719B2 (en) * 1990-09-07 1999-05-31 三井金属鉱業株式会社 Method for producing metal cadmium powder
US5472749A (en) * 1994-10-27 1995-12-05 Northwestern University Graphite encapsulated nanophase particles produced by a tungsten arc method
CN2276846Y (en) * 1996-08-15 1998-03-25 昆明理工大学 Equipment for producing superfine zinc powder by vacuum process
US5788738A (en) * 1996-09-03 1998-08-04 Nanomaterials Research Corporation Method of producing nanoscale powders by quenching of vapors
CN101618458B (en) * 2009-07-17 2012-11-21 江苏科创金属新材料有限公司 Preparation method of sub-micron zinc powder and preparation device thereof
CN102615289A (en) * 2011-01-28 2012-08-01 杭州华纳塔器科技有限公司 Evaporation-condensation method for preparing superfine metal powder
JP5821579B2 (en) * 2011-12-01 2015-11-24 昭栄化学工業株式会社 Plasma equipment for metal powder production
CN205362681U (en) * 2016-03-04 2016-07-06 云南驰宏锌锗股份有限公司 A condensing equipment for preparing superfine metallic powder
CN106623957B (en) * 2016-11-30 2020-01-21 江永斌 Nano particle grower for continuous mass production of superfine nano metal particles
CN207031478U (en) * 2017-07-25 2018-02-23 神雾科技集团股份有限公司 Miberal powder also original system
CN108746652B (en) * 2018-06-22 2021-08-31 上海硕余精密机械设备有限公司 Preparation device and preparation method of metal powder
CN109513917A (en) * 2018-12-18 2019-03-26 江苏博迁新材料股份有限公司 A kind of decreasing carbon method of PVD production nickel powder
CN109648093A (en) * 2018-12-18 2019-04-19 江苏博迁新材料股份有限公司 A kind of superfine metal nickel powder surface treatment method
CN112846206A (en) * 2020-12-29 2021-05-28 江苏博迁新材料股份有限公司 Pulse type metal powder preparation condensation method

Also Published As

Publication number Publication date
WO2022142527A1 (en) 2022-07-07
CN112846206A (en) 2021-05-28
TWI813105B (en) 2023-08-21
JP2023550716A (en) 2023-12-05

Similar Documents

Publication Publication Date Title
WO2022142527A1 (en) Pulsed-condensation method for metal powder preparation
CN104084596B (en) Method and device for manufacturing amorphous powder
CN105081337B (en) Method and device for preparing fine spherical metal powder through high-frequency supersonic plasma gas
CN111318716B (en) High-entropy alloy spherical powder for powder bed melting additive manufacturing and preparation method and application thereof
CN104057097A (en) Dual-ring supersonic atomizer
CN102476184A (en) Copper powder as well as manufacture method, manufacture device and heat radiation element thereof
CN109719303A (en) A kind of submicron order iron-nickel alloy powder producing method of soft magnetic materials
CN109967755A (en) A kind of spherical shape fine metal powder production system and its method
JPS6317884B2 (en)
CN209935864U (en) Spherical fine metal powder production system
CN207119805U (en) A kind of multistage cooling prepares the plasma atomising device of metal dust
CN203330402U (en) Adjustable titanium and titanium alloy melt superfine atomizing nozzle
US7449044B2 (en) Method and apparatus for producing metal powder
CN107030292A (en) A kind of multistage cooling prepares the plasma atomising device of metal dust
CN205147316U (en) Spray process silicon -aluminium alloy's cooling system
CN104152734A (en) Method for preparing tungsten-copper alloy from spherical tungsten powder
CN111390192B (en) Equipment and method for preparing spherical metal micro powder
CN201217073Y (en) Atomizing nozzle with gas concomitancy stream
CN201082470Y (en) Airflow atomizing nozzle device
CN105215361A (en) The cooling system of spray forming aluminium silicon and cool-down method
JP2721281B2 (en) Cooling method and mold for continuous casting
WO2023082494A1 (en) Conductive material ultrafine powder preparation device
TW202231345A (en) Ultrafine powder particles aggregation cooling tank structure and method for forming ultrafine powder particle
CN102950292A (en) Production method of submicron-order copper-manganesenickle alloy powder
CN203853547U (en) Equipment for manufacturing spherical molybdenum powder