阅读说明：本技术 一种滚筒式滚筒筛分分离方法 (Drum type roller screening separation method ) 是由 苏福州 李群 于 2020-11-29 设计创作，主要内容包括：本发明公开了一种滚筒式滚筒筛分分离方法,该滚筒式滚筒筛分分离方法包括以下几个步骤：将物料按照先筛分、然后选型的顺序进行筛分,将混合物料送入振动筛,筛出细粉末,将振动筛筛上的物料送入辊筛,筛出中等粒径粉末,将辊筛筛上的物料送入滚筒筛,将物料筛分为粗粉和细粉末；选择筛网,根据目标金属粉末的粒径,选择对应的粗筛网和细筛网,筛分后,细筛网上的粉末符合目标金属粉末的粒径要求；本发明所述的一种滚筒式滚筒筛分分离方法,该滚筒筛分分离方法通过先筛分、然后选型的顺序进行筛分,然后也可以对筛分的粒径进行检测,判断筛分的具体情况,当筛分粒径不均匀时,可调整设备的工艺参数,使得筛分准确率和效率大大提高。(The invention discloses a drum-type drum screening and separating method, which comprises the following steps: screening the materials according to the sequence of screening and then type selection, feeding the mixed material into a vibrating screen to screen out fine powder, feeding the material on the vibrating screen into a roller screen to screen out medium-particle-size powder, feeding the material on the roller screen into a drum screen, and screening the material into coarse powder and fine powder; selecting a screen, selecting a corresponding coarse screen and a corresponding fine screen according to the particle size of the target metal powder, and after screening, enabling the powder on the fine screen to meet the particle size requirement of the target metal powder; according to the drum-type drum screening and separating method, screening is performed in the order of screening and type selection, then the screened particle size can be detected, the specific condition of screening is judged, and when the screened particle size is not uniform, the technological parameters of equipment can be adjusted, so that the screening accuracy and efficiency are greatly improved.)

1. A drum-type drum screening separation method is characterized by comprising the following steps:

firstly, screening materials according to the sequence of screening and then type selection, feeding the mixed materials into a vibrating screen to screen out fine powder, feeding the materials on the vibrating screen into a roller screen to screen out medium-particle-size powder, feeding the materials on the roller screen into a drum screen, and screening the materials into coarse powder and fine powder;

selecting a screen, selecting a corresponding coarse screen and a corresponding fine screen according to the particle size of the target metal powder, and after screening, enabling the powder on the fine screen to meet the particle size requirement of the target metal powder;

weighing the screened metal powder, carrying out chemical analysis, calculating the weight of a dry basis in a sample, uniformly mixing the metal powder and the saturated mother liquor to prepare slurry, stopping screening, filtering and separating undersize to obtain an undersize wet basis and an undersize filtrate, carrying out chemical analysis on the undersize wet basis, and calculating the weight of the dry basis in the undersize wet basis.

2. A drum type drum screening method as claimed in claim 1, wherein: the magnetic field intensity of the magnetic separation is 1-15mT, the screening revolution is 120 rpm, and the vibration frequency is 3500 rpm.

3. A drum type drum screening method as claimed in claim 1, wherein: sieving in inert gas atmosphere, controlling the feeding speed of metal powder on each square meter of sieve mesh to be 3-5kg/min, the ultrasonic vibration frequency to be 36-42kHz, and the vibration deviation angle to be 6-14 degrees.

4. A drum type drum screening method as claimed in claim 1, wherein: if the weight of the wet basis of the oversize product is more than 0.1-0.2 g, the undersize product is sieved by using a sample separating sieve with gradually reduced pore diameter step by step until the weight of the wet basis of the oversize product is less than or equal to 0.2 g.

5. A drum type drum screening method as claimed in claim 1, wherein: the particle size of the screen is 140 meshes.

6. A drum type drum screening method as claimed in claim 1, wherein: the saturated mother liquor can be any one of H2S, HCN, HF, phosphoric acid, formic acid, acetic acid, ammonia water, calcium hydroxide (medium and strong alkali), aluminum hydroxide, zinc hydroxide and calcium hydroxide.

Technical Field

The invention belongs to the technical field of screening separation, and particularly relates to a drum-type drum screening separation method.

Background

The solid material is separated according to the required particle size by sieves with different mesh sizes. Often, the combination with crushing makes the particle size of the crushed material nearly equal to ensure that certain requirements are met or excessive crushing is avoided.

Screening is generally applicable to coarser material, i.e. material greater than 0.5 or 0.25 mm. The finer (less than 2 mm) is classified by the different particle sizes depending on the sedimentation speed of the material in the medium (water or air).

The particle groups are mainly separated according to the particle sizes or the volumes during screening, and the influence of the specific gravity and the shape is small; but when grading, the proportion and the shape have an extremely remarkable influence;

in order to improve the metal screening efficiency and improve the operation standard, a drum type drum screening separation method is proposed.

Disclosure of Invention

The invention mainly aims to provide a drum-type drum screening and separating method which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a drum-type drum screening separation method comprises the following steps:

firstly, screening materials according to the sequence of screening and then type selection, feeding the mixed materials into a vibrating screen to screen out fine powder, feeding the materials on the vibrating screen into a roller screen to screen out medium-particle-size powder, feeding the materials on the roller screen into a drum screen, and screening the materials into coarse powder and fine powder;

selecting a screen, selecting a corresponding coarse screen and a corresponding fine screen according to the particle size of the target metal powder, and after screening, enabling the powder on the fine screen to meet the particle size requirement of the target metal powder;

weighing the screened metal powder, carrying out chemical analysis, calculating the weight of a dry basis in a sample, uniformly mixing the metal powder and the saturated mother liquor to prepare slurry, stopping screening, filtering and separating undersize to obtain an undersize wet basis and an undersize filtrate, carrying out chemical analysis on the undersize wet basis, and calculating the weight of the dry basis in the undersize wet basis.

Preferably, the magnetic field intensity of the magnetic separation is 1-15mT, the rotation number of the screening is 120 rpm, and the vibration frequency is 3500 rpm.

Preferably, the sieving is performed in an inert gas atmosphere, the feeding speed of the metal powder per square meter of the sieve is controlled to be 3-5kg/min, the ultrasonic vibration frequency is 36-42kHz, and the vibration deviation angle is 6-14 degrees.

Preferably, if the weight of the wet basis of the oversize product is more than 0.1-0.2 g, the undersize product is sieved by gradually changing sample sieves with gradually smaller pore diameters until the weight of the wet basis of the oversize product is less than or equal to 0.2 g.

Preferably, the mesh has a particle size of 140 mesh.

Preferably, the saturated mother liquor can be any one of H2S, HCN, HF, phosphoric acid, formic acid, acetic acid, ammonia water, calcium hydroxide (medium and strong alkali), aluminum hydroxide, zinc hydroxide and calcium hydroxide.

Compared with the prior art, the invention has the following beneficial effects: according to the drum-type drum screening and separating method, the drum screening and separating method is used for screening through the sequence of screening and then type selection, then the screened particle size can be detected, the specific condition of screening is judged, and when the screened particle size is not uniform, the technological parameters of equipment can be adjusted, so that the screening accuracy and efficiency are greatly improved.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

When the drum-type roller is used for screening and separating, firstly, the materials are screened in the order of screening and then type selection, the mixed materials are sent into the vibrating screen to screen out fine powder, the materials on the vibrating screen are sent into the roller screen to screen out medium-particle-size powder, the materials on the roller screen are sent into the drum screen to screen the materials into coarse powder and fine powder, the vibrating screen adopts three-axis drive to force synchronous excitation, so that the screening machine can obtain a stable working state, the drum-type roller is particularly beneficial to screening with large processing capacity, the stress state of a screen frame is improved by the three-axis drive, the load of a single bearing is lightened, the stress of a side plate is uniform, stress concentration points are reduced, the stress condition of the screen frame is improved, the reliability and the service life of the screening machine are improved, the height of the machine set is effectively reduced due to the horizontal installation, the requirements of large and medium-sized movable screening machine sets can, the bearing temperature is effectively reduced, the service life is prolonged, the output of the elliptical vibrating screen can be improved by 1.3-2 times with the same screening area;

then selecting a screen, selecting a corresponding coarse screen and a corresponding fine screen according to the particle size of the target metal powder, and after screening, enabling the powder on the fine screen to meet the particle size requirement of the target metal powder;

weighing the screened metal powder, carrying out chemical analysis, calculating the weight of a dry basis in a sample, uniformly mixing the metal powder and a saturated mother liquor to prepare slurry, stopping screening, filtering and separating undersize products to obtain an undersize product wet basis and an undersize product filtrate, carrying out chemical analysis on the undersize product wet basis, calculating the weight of the dry basis in the undersize product wet basis, and analyzing the particle size and components of the metal powder to check whether the technological process is normal or not, so that waste products and defective products are reduced, high-quality and high-yield service is realized, the material consumption and the power consumption are reduced, the cost is reduced, the economic benefit service is improved, the environment can be effectively protected, the hidden danger is eliminated, the accident is avoided, the safety of workers and equipment is guaranteed, and the civilized production service is realized;

wherein, the magnetic field intensity of the magnetic separation is 1-15mT, the screening revolution is 120 r/min, and the vibration frequency is 3500 times/min; sieving in inert gas atmosphere, controlling the feeding speed of metal powder on each square meter of sieve mesh to be 3-5kg/min, the ultrasonic vibration frequency to be 36-42kHz, and the vibration deviation angle to be 6-14 degrees; if the weight of the wet basis of the oversize product is more than 0.1-0.2 g, gradually using a sample separating sieve with gradually reduced aperture to sieve the undersize product until the weight of the wet basis of the oversize product is less than or equal to 0.2 g; the particle size of the screen is 140 meshes; the saturated mother liquor can be any one of H2S, HCN, HF, phosphoric acid, formic acid, acetic acid, ammonia water, calcium hydroxide (medium and strong alkali), aluminum hydroxide, zinc hydroxide and calcium hydroxide.

Example 1

Screening the materials according to the sequence of screening and then type selection, feeding the mixed material into a vibrating screen to screen out fine powder, feeding the material on the vibrating screen into a roller screen to screen out medium-particle-size powder, feeding the material on the roller screen into a drum screen, and screening the material into coarse powder and fine powder; selecting a screen, selecting a corresponding coarse screen and a corresponding fine screen according to the particle size of the target metal powder, and after screening, enabling the powder on the fine screen to meet the particle size requirement of the target metal powder; weighing the screened metal powder, carrying out chemical analysis, calculating the weight of a dry basis in a sample, uniformly mixing the metal powder and saturated mother liquor to prepare slurry, stopping screening, filtering and separating undersize to obtain an undersize wet basis and an undersize filtrate, carrying out chemical analysis on the undersize wet basis, and calculating the weight of the dry basis in the undersize wet basis;

the detection shows that the particle size of the fine metal powder is 20 meshes, the particle size of the medium metal powder is 50 meshes, the particle size of the coarse metal powder is 140 meshes, and the particle sizes of the metal powders of different types are consistent and have the deviation of 1-2 meshes.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.