CN104971813B - A kind of magnesium hydroxide grinds grading plant - Google Patents

Abstract

The invention discloses a magnesium hydroxide grinding and grading device, which comprises a lower hopper provided with a first automatic unloading valve, the lower hopper is connected with an auxiliary discharge pipe, and the auxiliary discharge pipe is connected with the inlet with a first cut-off valve and an air compressor. The air storage tank is connected to the compressed air storage tank of the machine, and the air storage tank is also connected to the third cut-off valve, electromagnetic pulse valve and air hammer in turn. There is a classifier at the discharge port and is connected with the separator, and the separator is also connected with the dust collector, and the dust collector is also connected with a fan. The invention adopts compressed air impact to prevent the accumulation of magnesium hydroxide powder during blanking; adopts air hammer and electromagnetic pulse valve to knock the feeding bin regularly to prevent the accumulation of magnesium hydroxide powder; adopts target type airflow mill to grind magnesium hydroxide powder To 3000-10000 mesh; using classifier, cyclone separator, bag filter, centrifugal fan, by changing the speed of the classifier, the powder of the required mesh can be obtained.

Description

A kind of magnesium hydroxide grinding classifying device

technical field

The invention relates to a magnesium hydroxide grinding and classifying device, which belongs to the technical field of chemical production equipment.

Background technique

When the magnesium hydroxide powder is crushed to 100 mesh, due to the intermolecular tension, the magnesium hydroxide tends to accumulate and bridge in the feeding bin, resulting in uneven or even impossible feeding at the feeding port of the lower feeding bin. , to crush magnesium hydroxide from 100 mesh to 3000-10000 mesh, which cannot be achieved by ordinary grinding methods, and at the same time, the crushing process is a physical process with inhomogeneity.

Contents of the invention

The purpose of the present invention is to provide a magnesium hydroxide grinding and classifying device, which can make the magnesium hydroxide powder with a number of 100 mesh be uniformly fed, and be crushed to 3000-10000 mesh by airflow, and the obtained grade can be obtained by changing the motor speed of the classifier. It can meet the requirements of dust-free and environmental protection.

In order to achieve the above object, the concrete technical scheme adopted in the present invention is:

A magnesium hydroxide grinding and grading device, comprising a funnel-shaped lower hopper with a first automatic discharge valve at the outlet, the exhaust port on the top of the lower hopper is connected with a valve extending inward to the first automatic discharge valve The auxiliary drainage pipe, the inlet of the auxiliary drainage pipe is provided with a second cut-off valve and is connected to the outlet of the compressed air storage tank connected with the first cut-off valve and the air compressor in turn through a pipeline, and the compressed air storage tank The tank is also connected with the third cut-off valve, electromagnetic pulse valve and the air hammer arranged outside the tapered end of the lower silo through pipelines, and the outlet of the first automatic unloading valve is connected with an air inlet through the A jet mill with a pipeline connected to the outlet of the compressed air storage tank provided with a fourth cut-off valve, the outlet of the jet mill is provided with a classifier and a separator of the first bin is provided through the pipeline and the outlet The inlet of the first silo is connected, the outlet of the first silo is provided with a second automatic discharge valve, the inlet of the separator is also connected to the inlet of the dust collector with the outlet of the second silo through a pipeline, and the collector The inlet of the duster is also connected with a fan, and the outlet of the second silo is provided with a third automatic discharge valve.

Further, the jet mill can be of flat type, circulating tube type, or counter-jet type, but is preferably a target jet mill.

Further, the separator is preferably a spiral separator.

Further, the dust collector is preferably a bag-type dust collector, of course, it can also be an electric dust collector or the like.

Further, the fan is preferably a centrifugal fan, of course, it can also be an axial fan or a rotary fan.

Compressed air flows to the auxiliary discharge pipe through the pipeline and enters the discharge port of the lower hopper. The impact of the air flow can avoid the accumulation of magnesium hydroxide and prevent bridging.

By controlling the electromagnetic pulse valve, the compressed air is controlled so that the air hammer regularly hits the feeding bin, which can prevent the accumulation of magnesium hydroxide powder and cause the phenomenon that the feeding cannot be performed.

Through the jet mill, the 100-mesh magnesium hydroxide powder can be crushed to 3000-10000 mesh, which meets the production requirements.

By changing the rotating speed of the classifier, magnesium hydroxide powders with different meshes can be obtained.

The first to third automatic unloading valves can be controlled by a computer for automatic discharge, which saves production costs, and the overflowing magnesium hydroxide powder can be collected through the bag filter to meet the requirements of environmental protection and dust removal

Advantage and beneficial effect of the present invention are:

Compressed air impact is used to prevent the accumulation of magnesium hydroxide powder during blanking to ensure smooth blanking; air hammers and electromagnetic pulse valves are used to regularly knock on the unloading bin to prevent the accumulation of magnesium hydroxide powder from causing unloading; the use of targets Type jet mill can grind 100-mesh magnesium hydroxide powder to 3000-10000 mesh; use classifier, cyclone separator, bag filter, centrifugal fan, and change the speed of classifier to get the powder of required mesh, and Meet dust-free environmental protection requirements.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present invention;

In the figure: 1 is the lower silo, 2 is the exhaust port, 3 is the exhaust pipe, 4 is the jet mill, 5 is the classifier, 6 is the separator, 9 is the dust collector, 10 is the fan, 12 is the air hammer , 13 is the electromagnetic pulse valve, 15 is the third stop valve, 16 is the compressed air storage tank, 17 is the air compressor, 19 is the second stop valve, 20 is the first stop valve, 21 is the fourth stop valve, 71 is the The first silo, 72 is the second silo, 81 is the first automatic discharge valve, 82 is the second automatic discharge valve, and 83 is the third automatic discharge valve.

detailed description

In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention.

As shown in Figure 1, a magnesium hydroxide grinding and classifying device includes a funnel-shaped lower silo 1 with a first automatic discharge valve 81 at the outlet, and is characterized in that: the exhaust port 2 at the top of the lower hopper 1 A discharge aid pipe 3 extending inward to the first automatic unloading valve 81 is connected, and the inlet of the drain aid pipe 3 is provided with a second shut-off valve 19 and is sequentially connected with the first shut-off valve 20 through a pipeline. It is connected with the outlet of the compressed air storage tank 16 of the air compressor 17, and the compressed air storage tank 16 is also connected with the third shut-off valve 15, the electromagnetic pulse valve 13 and the cone arranged in the lower silo 1 through pipelines. The air hammer 12 outside the shaped end is connected, and the outlet of the first automatic unloading valve 81 is connected with the airflow that the air inlet is connected to the outlet of the compressed air storage tank 16 through the pipeline provided with the fourth shut-off valve 21 Mill 4, the outlet of the jet mill 4 is provided with a classifier 5 and is connected to the inlet of the separator 6 provided with the outlet of the first feed bin 71 through a pipeline, and the outlet of the first feed bin 71 is provided with The second automatic unloading valve 82, the inlet of the separator 6 is also connected to the inlet of the dust collector 9 provided with the second feed bin 72 through a pipeline, and the inlet of the dust collector 9 is also connected to a fan 10, The outlet of the second storage bin 72 is provided with a third automatic unloading valve 83 .

The jet mill 4 is a target jet mill.

The separator 6 is a spiral separator.

The dust collector 9 is a bag type dust collector.

The fan 10 is a centrifugal fan.

In addition to the above-mentioned embodiments, the present invention can also have other implementation modes, and all technical solutions formed by equivalent replacement or equivalent transformation all fall within the scope of protection required by the invention.

Claims (1)

1. a magnesium hydroxide grinding and classifying device, comprising the outlet is provided with the funnel-shaped lower feed bin (1) of the first automatic discharge valve (81), it is characterized in that: the exhaust at the top of the lower feed bin (1) The mouth (2) is connected with an auxiliary discharge pipe (3) extending inward to the first automatic unloading valve (81), and the inlet of the auxiliary discharge pipe (3) is provided with a second shut-off valve (19) and passes through The pipeline is connected to the outlet of the compressed air storage tank (16) connected with the first cut-off valve (20) and the air compressor (17) in turn at the inlet, and the compressed air storage tank (16) is also connected to the first Three cut-off valves (15), electromagnetic pulse valve (13) and the pneumatic hammer (12) that are arranged on the outside of the tapered end of the lower silo (1) are connected, and the first automatic discharge valve (81) The outlet is connected with the jet mill (4) that the air inlet is connected with the outlet of the compressed air storage tank (16) through the pipeline that is provided with the fourth shut-off valve (21), and the discharge port of the jet mill (4) A classifier (5) is provided and is connected to the inlet of the separator (6) provided with a first feed bin (71) at the outlet through a pipeline, and the outlet of the first feed bin (71) is provided with a second automatic unloading material valve (82), the inlet of the separator (6) is also connected to the inlet of the dust collector (9) with the outlet of the second feed bin (72) through a pipeline, and the inlet of the dust collector (9) Also be connected with blower fan (10), the outlet of described second feed bin (72) is provided with the 3rd automatic unloading valve (83); Wherein, described jet mill (4) is target type jet mill, flat type jet mill 1. Any one of circulating tube type jet mill and counter-jet jet mill; the separator (6) is a spiral separator; the dust collector (9) is a bag filter or an electric dust collector; The fan (10) is a centrifugal fan, an axial fan or a rotary fan.