超微粉碎机厂家

咨询热线

13256798563

当前位置:河北快3开奖结果-新闻动态-骏程百科-超细粉体的原理及相关设备性能

neixin.png

超细粉体的原理及相关设备性能

目前较常见的分级办法是基于重力场和向心力场停止分级。
At present, the more common classification method is based on gravity field and centripetal field stop classification.
重力场分级原理是古老、经典也是较完善的理论,其理论根底是依据层流状态下的斯托克斯定律。在分级过程中,假定流场是按层流状态停止,并假定超细固体颗粒呈球形,在介质中是自在沉降。这些与实践状况都有较大差别。在向心力场中,颗粒可取得比重力加速大得多的离心加速度,故同样的颗粒在离心场中的沉降速度远大于重力场情形,换言之,即便较小的颗粒也能取得较大的沉降速度。
The grading principle of gravity field is an ancient and classical theory, which is based on Stokes law in laminar flow. In the process of classification, it is assumed that the flow field stops in the laminar state, and that the ultrafine solid particles are spherical and settle freely in the medium. These are quite different from the actual situation. In centripetal field, particles can achieve much greater centrifugal acceleration than gravitational acceleration, so the settling speed of the same particles in centrifugal field is much faster than that in gravitational field, in other words, even smaller particles can achieve greater settling speed.
此外,超细粉体分级按所用介质可分为干法分级与湿法分级。干法分级的特性是用空气作流体,本钱较低,便当易行,但它有两个缺乏,一是易形成空气污染,二是分级的精度不高。湿法分级用液体作为分级介质,存在较多的后处置问题,即分级后的粉体需求脱水、枯燥、分散废水处置等,但它有着分级精度高、无爆炸性粉尘等特性。
In addition, the classification of ultrafine powders can be divided into dry classification and wet classification according to the medium used. Dry classification is characterized by the use of air as a fluid, low cost and easy operation, but it has two shortcomings: one is easy to form air pollution, the other is low classification accuracy. The liquid is used as classification medium in wet classification. There are many post-treatment problems, such as dehydration, dryness and disposal of dispersed wastewater after classification, but it has the characteristics of high classification accuracy and no explosive dust.
超细分级设备
Ultra-fine classification equipment
迄今为止,超细分级设备可谓百花齐放。按流体介质的不同可分为干式分级和湿式分级,在干式分级中,依据分级原理的不同又可分为重力式、离心式、惯性式等品种。
Up to now, super-fine classification equipment can be described as a hundred flowers blooming. According to the different fluid medium, it can be divided into dry classification and wet classification. In dry classification, according to the different classification principles, it can be divided into gravity, centrifugal, inertia and other varieties.
重力式超细分级机
Gravity Superfine Classifier
重力式超细分级机是应用不同粒径的颗粒在重力场中沉降速度不同而停止分级的。重力式分级机有程度流型和垂直流型两品种型。
The gravity Superfine Classifier stops classification by using different particle sizes with different settling velocities in gravity field. There are two types of gravity classifier, i. e. degree flow type and vertical flow type.
惯性分级机
Inertial classifier
颗粒运动时具有一定的动能,运动速度相同时,质量大者其动能也大,即运动惯性大。当他们遭到改动其运动方向的作用时,由于惯性的不同会构成不同的运动轨迹,从而完成大小颗粒的分级。目前,这种分级机的分级粒度已能到达1μm,若能有效防止颗粒聚会和分级室内涡流的存在,分级粒径可望到达亚微米级,分级精度和分级效率也会明显进步。
中药超细粉碎机
Particles have a certain kinetic energy when they move. When they move at the same speed, the kinetic energy of particles with larger mass is larger, that is, the inertia of motion is larger. When they are subjected to the action of changing their direction of motion, the different inertia will form different trajectories, thus completing the classification of particles. At present, the grading particle size of the classifier has reached 1 micron. If the particle gathering and the eddy current in the classifier room can be effectively prevented, the grading particle size is expected to reach the sub-micron level, and the grading accuracy and efficiency will also be significantly improved.
离心式分级机
Centrifugal classifier
离心式分级机由于易于产生远强于重力场的向心力场,因此是迄今为止开发较多的一类超细分级机。依照向心力场中流型的不同,可分为自在涡型和强迫涡型两类。常见的自在涡型(或准自在涡型)有DS型分级机、SLT型分级机等;强迫涡型分级机有MC型分级机、MS型分级机、MSS型分级机、ATP分级机、MP型分级机、涡轮分级机等。
Centrifugal classifier is a kind of super-fine classifier developed so far because it is easy to produce centripetal force field far stronger than gravity field. According to the difference of flow pattern in centripetal field, it can be divided into free vortex and forced vortex. Common free-vortex (or quasi-free-vortex) classifiers include DS classifier, SLT classifier, etc. Forced-vortex classifier includes MC classifier, MS classifier, MSS classifier, ATP classifier, MP classifier, turbine classifier, etc.
射流分级机
Jet classifier
射流分级机是集惯性分级、疾速分级和微细颗粒的附壁效应(Coanda效应)等原理于一身停止超细分级的分级设备。简单的讲Coanda效应就是微细颗粒具有的随气流沿弯曲壁面运动的特性。射流分级机与其他分级机相比具有以下特性:
Jet classifier is a classifier which combines the principles of inertia classification, rapid classification and Coanda effect of fine particles to stop superfine classification. Simply speaking, Coanda effect is the characteristic of fine particles moving along the curved wall with airflow. Compared with other classifiers, jet classifier has the following characteristics:
(1)分级局部无运动部件,维护工作量小,工作牢靠。
(1) There are no moving parts in the grading part, so the maintenance workload is small and the work is reliable.
(2)放射射流可使粉体得到良好的预分散。
(2) The powder can be well pre-dispersed by radiation jet.
(3)颗粒一经分散,立刻进入分级机停止疾速分级,限度地防止了颗粒的二次聚会。
(3) Once the particles are dispersed, they enter the classifier immediately to stop rapid classification, which prevents the secondary agglomeration of the particles to a limit.
(4)可取得多级产品,各级产品的粒度可经过分级刀刃角度和出口压力来灵敏调理。
(4) Multi-level products can be obtained, and the granularity of products at all levels can be adjusted sensitively by grading blade angle and outlet pressure.
(5)分级效率和分级粒度高。
(5) High classification efficiency and granularity.

济南骏程机械设备河北快3开奖结果

PHONE

13256798563 / 400-766-9788 

E-mail

junchengweifen@163。com

ADDRESS

济南市市中区袁庄会龙工业园

Website

http://www.69gege.com

  • 手机客户端
  • 客服微信

河北快3开奖结果 / 关于我们 / 产品中心 / 工程案例 / 新闻动态 / 服务和支持 / 联系我们 /

版权所有:济南骏程机械设备河北快3开奖结果 备案号: 鲁ICP备15034461号-3 技术支持:  网站地图 XML TXT 流量统计:

伯爵彩票APP下载 泊利彩票APP下载 爱乐彩票平台 爱购彩票APP 博美彩票APP下载 伯爵彩票APP 必博彩票平台 必中彩票注册 博美彩票APP下载 博牛彩票APP下载