Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for controlling apparent density of low-apparent-density iron powder

A technology of bulk density and low bulk density, which is applied in the field of powder bulk density control and adjustment, and can solve problems such as low output, inability to achieve precise control, and high noise

Active Publication Date: 2018-11-13
LAIWU TAIDONG POWDER TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our current control method adopts the fixed speed process of nitrogen circulation mechanical pulverizer, which has low output, high noise, low yield, and process performance indicators such as bulk density are difficult to accurately adjust and control
At present, the means of controlling the loose ratio in this industry are generally achieved by different crushing methods or by changing the crushing speed, which cannot achieve the purpose of precise control
[0003] With the continuous improvement of the technical level and product structure of many product manufacturers, the requirements for process performance indicators such as bulk density are becoming more and more stringent. The method of using a nitrogen circulation mechanical pulverizer to control the bulk density with a fixed speed process has seriously restricted the low bulk density. The development of powder industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The production of 0.8-0.9 low bulk density micro-nano powder is produced by the following steps:

[0029] 1. Feed flow rate: The qualified push boat furnace powder cake is transported to the crushing silo by driving and crushed into a powder with a particle size of 10-15mm, which is sent to the crusher by the anti-blocking tube feeder for crushing and grinding. The adjustment range of the anti-blocking pipe feeder is 0-30HZ.

[0030] 2. Equipment parameters: The crusher adopts nitrogen circulation mechanical crushing classifier, and the crushing motor is Y 2 -200L2-237KW; anti-blocking pipe feeder is ZGFE-2L type, feeding capacity > 300kg / h; Roots blower motor Y3-180L-4 22KW; HL--100 pulse bag filter handles air volume of 2040m 3 / h, the suction volume is controlled by a DN100 manual butterfly valve.

[0031] 3. Parameter control: Open the nitrogen valve to start the Roots blower and crusher. Adjust the speed of the crusher to 25HZ, open the anti-blocking pipe, adjus...

Embodiment 2

[0037] The production of 1.0-1.1 low bulk density micro-nano powder is produced by the following steps:

[0038] 1. Feed material: Qualified push boat furnace powder cake is hoisted by driving to the crushing silo and crushed in the silo into powder with a particle size of 10-15mm. The adjustment range of plugging feeder is 0~30HZ.

[0039] 2. Equipment parameters: The crusher adopts nitrogen circulation mechanical crushing classifier, and the crushing motor is Y 2-200L2-237KW; anti-blocking pipe feeder is ZGFE-2L type, feeding capacity > 300kg / h; Roots blower motor Y3-180L-4 22KW; HL--100 pulse bag filter handles air volume of 2040m 3 / h, the suction volume is controlled by a DN100 manual butterfly valve.

[0040] 3. Parameter control: Open the nitrogen valve to start the Roots blower and crusher. Adjust the speed of the crusher to 30HZ, open the anti-blocking pipe, adjust the speed of the feeder to 10HZ, and adjust the speed of the classifier to 13HZ. After crushing, take...

Embodiment 3

[0047] The production of 1.1-1.2 low bulk density micro-nano powder is produced by the following steps:

[0048] 1. Feed material: Qualified push boat furnace powder cake is hoisted by driving to the crushing silo and crushed in the silo into powder with a particle size of 10-15mm. The adjustment range of plugging feeder is 0~30HZ.

[0049] 2. Equipment parameters: The crusher adopts nitrogen circulation mechanical crushing classifier, and the crushing motor is Y 2 -200L2-237KW; anti-blocking pipe feeder is ZGFE-2L type, feeding capacity > 300kg / h; Roots blower motor Y3-180L-4 22KW; HL--100 pulse bag filter handles air volume of 2040m 3 / h, the suction volume is controlled by a DN100 manual butterfly valve.

[0050] 3. Parameter control: Open the nitrogen valve to start the Roots blower and crusher. Adjust the speed of the crusher to 35HZ, open the anti-blocking pipe, adjust the speed of the feeder to 8HZ, and adjust the speed of the classifier to 15HZ. After crushing, take...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
bulk densityaaaaaaaaaa
densityaaaaaaaaaa
bulk densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for controlling the apparent density of low-apparent-density iron powder. Qualified boat pushing furnace cakes are hoisted and conveyed through a travelling crane to acrushing bin to be stirred and crushed in the bin, and then conveyed to enter a nitrogen circulating mechanical smashing machine to be smashed; frequency of a blocking-preventing pipe fan at the feeding end of the nitrogen circulating mechanical smashing machine is adjusted to adjust the grinding speed and adjust the fine powder output and input amount, the powder obtained after crushing each time is classified by a classifying machine arranged at a discharging opening of the crushing machine, the powder with the large particle size continues to stay in a crushing cavity to be crushed, and the powder with the small particle size is deposited and collected in a cyclone separator; and after crushing and sieving are completed each time, the apparent density of screen underflow is detected, and compared with the technology requirement, when deviation occurs, various variable frequency parameters can be adjusted in time. The method aims to overcome the defects that the yield of a current nitrogen circulating mechanical smashing machine is low, the cost is high, and the apparent density is difficult to control, the method is a new technology for controlling the apparent density in the iron powder production process in a full process and all-around manner, and the apparent density of the iron powder can be controlled effectively and accurately.

Description

technical field [0001] The invention relates to a process method for adjusting and controlling the bulk density of powder, in particular to a method for controlling the bulk density of iron powder with low bulk density. Background technique [0002] Powder metallurgy is a new high-tech industry in my country in the 1960s. After entering the 21st century, the powder industry has developed rapidly and the technical level has been continuously improved. Ultrafine iron powder is one of the basic raw materials of powder metallurgy industry. Due to its large specific surface area and activity, it has special properties such as electricity, magnetism, light, catalysis, adsorption and chemical reaction, and is widely used. The bulk density of iron powder with low bulk ratio is generally required to be between 0.8-1.6g / cm3, and the control span is relatively large. Our current control method adopts the fixed speed process of nitrogen circulation mechanical pulverizer, which has low ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04
CPCB22F9/04B22F2201/02
Inventor 吕学进张正法李军苗宗新亓国瑞蒋广宇宫文国蒋浩
Owner LAIWU TAIDONG POWDER TECH