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

Method for preparing fibrous ultrafine powder with high length-diameter ratio

A technology of ultrafine powder and high aspect ratio, which is applied in the field of mineral processing, can solve the problems of shortage of ultrafine wollastonite powder with high aspect ratio, low level of deep processing, and restriction of rapid development, and achieve the goal of increasing added value Effect

Pending Publication Date: 2020-12-29
SOUTHWEAT UNIV OF SCI & TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although my country is rich in fibrous (needle) powder minerals, such as wollastonite, etc., the level of deep processing is low, and domestic high aspect ratio ultrafine wollastonite powder is in short supply, mainly relying on imports, which seriously restricts my country's high-quality plastics, The rapid development of industries such as rubber and advanced pigments

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing fibrous ultrafine powder with high length-diameter ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] see figure 1 , a method for preparing fibrous ultrafine powder with a high aspect ratio, specifically comprising the following steps: entering wollastonite powder 1 with an initial particle size of less than 5 mm into a supersonic directional flow field forming device 3 through a feed control system 2 Carry out directional acceleration; the wollastonite powder 1 is accelerated to 100-600m / s and then collides with the impact target 4 to be crushed to form wollastonite ultrafine powder 5; the working medium used in the supersonic directional flow field forming device 3 Superheated steam 12, superheated steam 12 is prepared by waste heat boiler 11 using industrial waste heat 10 as heat source; wollastonite superfine powder 5 is sorted by classifier 7, and the high aspect ratio silica fume that meets the particle size requirements The ultrafine powder 8 is finally collected by the bag filter 9; the feeding speed of the wollastonite powder 1 and the ultrafine wollastonite po...

Embodiment 2

[0018] see figure 1 , a method for preparing fibrous ultrafine powder with a high aspect ratio, specifically comprising the following steps: the sepiolite powder 1 with an initial particle size less than 5mm enters a supersonic directional flow field forming device 3 through a feed control system 2 Carry out directional acceleration; after the sepiolite powder 1 is accelerated to 100-600m / s, it collides with the impact target 4 and crushes to form sepiolite ultrafine powder 5; the working medium used in the supersonic directional flow field forming device 3 It is superheated steam 12, and superheated steam 12 is prepared by waste heat boiler 11 using industrial waste heat 10 as a heat source; sepiolite ultrafine powder 5 is sorted by classifier 7 to obtain high aspect ratio seafoam that meets the particle size requirements. The stone superfine powder 8 is finally collected by the bag filter 9; the feeding speed of the sepiolite powder 1 and the high aspect ratio sepiolite supe...

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

No PUM Login to View More

Abstract

The invention discloses a method for preparing fibrous ultrafine powder with a high length-diameter ratio. Aiming at how to realize the preparation method of the fibrous ultrafine powder with the highlength-diameter ratio, a directional accelerated collision crushing method is adopted to perform ultrafine processing on the fibrous powder. The method specifically comprises the following steps that: 1) fibrous powder of which the initial particle size is less than 5mm is fed into a supersonic directional flow field through a feeding system for acceleration, and collision crushing is performed on an impact target; 2) a working medium adopted by the supersonic directional flow field forming device is superheated steam, and the superheated steam is prepared through industrial waste heat; 3) the fibrous ultrafine powder meeting the particle size requirement is sorted through a grader, and finally the sorted fibrous ultrafine powder is collected through a bag type dust collector; and 4) thefeeding speed of fibrous powder raw materials and the yield of the fibrous ultrafine powder with the high length-diameter ratio are controlled through a feeding control system and a gas-solid concentration monitor. The method disclosed by the invention provides technical support for preparation of the fibrous ultrafine powder with the high length-diameter ratio.

Description

technical field [0001] This patent relates to the technical field of mineral processing, in particular to a method for preparing fibrous ultrafine powder with high aspect ratio. Background technique [0002] As an inorganic mineral filler, fibrous (acicular) powder can form an interwoven network structure in the material, thereby improving the structural strength of the material, and finally achieving the purpose of strengthening and toughening. Typical fibrous minerals are sepiolite, wollastonite, etc. Taking wollastonite as an example, my country's wollastonite ore resources are widely distributed and have large reserves, and the output and export volume of wollastonite rank among the top in the world. As a filler, wollastonite is widely used in rubber, plastic, paint, coating and other fields. However, these high value-added industries have extremely high requirements on the particle size and aspect ratio of wollastonite powder. High aspect ratio (>15:1) wollastonit...

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
IPC IPC(8): B02C19/06B02C23/20B02C25/00
CPCB02C19/066B02C23/20B02C25/00
Inventor 林龙沅康菲菲陈海焱徐中慧张明星
Owner SOUTHWEAT UNIV OF SCI & TECH