CN204999954U - Molybdenum concntrate dehydration system - Google Patents

Abstract

The utility model relates to a dehydration and drying system for molybdenum concentrate. The ore is transported to the mixing tank, and the slurry in the mixing tank is sent to the diaphragm filter press for pressure filtration, and the filter cake after pressure filtration is sent to the buffer ore bin, then transported to the electromagnetic dryer for drying and fed to the mixer. The utility model can be produced continuously, with high degree of automation. When the filter press fineness is as high as -400 mesh and accounts for more than 90% of the molybdenum concentrate, the moisture content of the product is reduced from 80%-85% to below 15%, so that the molybdenum The drying and packaging of the concentrate is well prepared and the filtration time is short. The drying process is a fully enclosed operation, and the material is not easy to agglomerate, thus avoiding the large-scale operation process of breaking up the material after drying, so as to facilitate the automatic packaging of the material.

Description

A molybdenum concentrate dehydration drying system

technical field

The utility model relates to a molybdenum concentrate dehydration drying system.

Background technique

According to the quality standard of molybdenum concentrate YS/T235-2007 (national standard), the total oil and water content (mass fraction) of molybdenum concentrate should not be greater than 6%. Therefore, dehydration + drying process must be used in beneficiation to meet the quality of molybdenum concentrate Require.

At present, some of the molybdenum concentrates produced in my country come from copper-molybdenum ore. During the separation of copper-molybdenum ore, due to the fine particle size of the ore, a second-stage grinding process is required, but the grinding fineness of the second stage Reaching -400 mesh accounts for more than 90%. In addition, the mass concentration of molybdenum concentrate obtained after flotation is 15%-20%. If a belt filter or ceramic filter is used, the following problems will exist:

First, both the belt filter and the ceramic filter use the vacuum made by the fuselage to separate the concentrate and water, but if the fineness of the ore reaches -400 mesh and accounts for more than 90%, the concentrate will block the filter. As a result, normal production cannot be performed.

Second, since the concentration of molybdenum concentrate is only 15%-20%, it is necessary to pre-concentrate the molybdenum concentrate by using a ceramic filter or a belt filter. During the process, the concentrate is easily drifted away with the overflow water, resulting in the loss of molybdenum metal.

In addition, when the molybdenum concentrate is dried, because the molybdenum concentrate contains kerosene, indirect drying must be used in the drying process to prevent the kerosene from reaching the ignition point and blasting. At present, the methods suitable for indirect drying include cooking method and flash dryer. Paddle dryer or electromagnetic dryer drying method, but the cooking method has problems such as high energy consumption, agglomeration of dried concentrate, high labor intensity, and low efficiency, while flash dryer and paddle dryer are used in many Concentrate amount.

Utility model content

Aiming at the problem of filtering and drying molybdenum concentrate, the present invention intends to provide a molybdenum concentrate dehydration and drying system with high degree of automation, continuous production and good working environment.

The technical scheme of the utility model is: a molybdenum concentrate dehydration and drying system, which sequentially includes a flotation machine, a mixing tank, a diaphragm filter press, a buffer ore bin, an electromagnetic dryer, a mixing machine and an automatic packaging machine. After the selection, the molybdenum concentrate is transported to the mixing tank, and the slurry in the mixing tank is sent to the diaphragm filter press for pressure filtration, and the filter cake after pressure filtration is sent to the buffer ore bin, and then transported to the electromagnetic dryer for drying and fed into the mixing tank. feeder.

After the flotation of the utility model, the molybdenum concentrate is transported to the mixing tank through the transport pump.

A frequency conversion feed pump is arranged between the mixing tank and the membrane filter press to feed the ore slurry in the mixing tank to the membrane filter press.

The membrane filter press is equipped with an air compressor.

The buffer ore bin and the electromagnetic dryer are equipped with frequency conversion screw conveyors, which are used to send the materials in the buffer ore bin to the electromagnetic dryer.

The dried material of the utility model is fed into the mixer through the screw conveyor and the bucket elevator.

The utility model adopts a diaphragm filter press instead of a ceramic filter, a belt filter and a cooking method, and can be produced continuously. It is equipped with a frequency conversion feeding pump and an air compressor, and has a high degree of automation. The filter press fineness is as high as -400 mesh. When the molybdenum concentrate is more than 90%, the moisture content of the product is reduced from 80%-85% to less than 15%, so that it is fully prepared for the drying and packaging of the molybdenum concentrate, and the filtration time is short, and the average time The operating cycle is only 30min-40min. In the connecting section of filtration and drying, a buffer ore bin is configured to ensure that the material is evenly fed into the dryer. In addition, the molybdenum concentrate is dried with an electromagnetic dryer, and the moisture content of the dried product is less than 4%. The drying process is a fully enclosed operation, and the material is not easy to agglomerate, thus avoiding the large-scale operation process of breaking up the dried material for convenience Automatic packaging of materials. The connecting funnel between the equipment of this system adopts a fully enclosed connection, the amount of dust is small during actual production, and the working environment is good. The process flow of this system is simple, the production efficiency is high, and the obtained dry concentrate can be directly used as a smelting raw material. In addition, the system can also be used for filtering and drying the molybdenum concentrate obtained from the separation of a single molybdenum ore.

Description of drawings

Accompanying drawing 1 is a schematic diagram of the utility model system.

detailed description

Each equipment used in the utility model can adopt prior art, can be commercially available.

As shown in Figure 1, the molybdenum concentrate dehydration and drying system of the present invention includes a flotation machine, a mixing tank, a diaphragm filter press, a buffer ore bin, an electromagnetic dryer, a mixer and an automatic packaging machine in sequence. After flotation, the molybdenum concentrate is transported to the mixing tank through the delivery pump. A frequency conversion feed pump is arranged between the mixing tank and the membrane filter press to feed the slurry in the mixing tank to the membrane filter press. The membrane filter press is equipped with an air compressor. The filter cake after pressure filtration is sent to the buffer ore bin. The buffer ore bin and the electromagnetic dryer are equipped with a frequency conversion screw conveyor, which is used to send the materials in the buffer ore bin to the electromagnetic dryer. The dried material is fed into the mixer through the screw conveyor and the bucket elevator, and finally packed.

Specifically, adopt the technological process of the utility model system as follows:

The mass concentration after flotation of the flotation machine is 15%-20% molybdenum concentrate is pumped to the mixing tank for stirring and mixing;

Since the process of feeding the pulp into the filter press is a process of more at the front and less at the end, the frequency conversion feed pump is used to send the pulp in the mixing tank into the diaphragm filter press for pressure filtration, and the diaphragm filter press is equipped with an air compressor. Blow back the filter cake with air, and the water content of the filter cake obtained after press filtration is less than 15%;

The filter cake of the filter press falls into the buffer bin to ensure that the material can be evenly fed into the electromagnetic dryer;

The frequency conversion screw conveyor is used to transport to the electromagnetic dryer for drying, and the moisture content of the dried material can be controlled below 4%, which meets the metallurgical requirements for molybdenum concentrate finished products;

The dried material is fed into the mixer through the screw conveyor and the bucket elevator, and after being mixed and dispersed, it is packed with an automatic packaging machine.

Specific example 1: Taking the actual production of copper-molybdenum ore in a certain place in Yunnan as an example, after the ore is ball-milled in the second stage, the grinding fineness is -400 mesh, accounting for 95%, and the mass concentration of molybdenum concentrate after flotation is 15%. After the concentrate is sent to the mixing tank, it is sent to the diaphragm filter press through the frequency conversion feeding pump. The moisture content of the filter cake obtained after the filtration is less than 15%, and the filter cake is sent to the electromagnetic dryer by the screw conveyor for drying. less than 4%.

Specific example 2: Take the actual production of molybdenum ore in a certain place in Henan as an example. After the ore is passed through the second-stage ball mill, the grinding fineness is -325 mesh, accounting for 95%. The mass concentration of molybdenum concentrate after flotation is 18%. Molybdenum concentrate After the ore is sent to the mixing tank, it is sent to the diaphragm filter press through the frequency conversion feeding pump. The moisture content of the filter cake obtained after the pressure filtration is less than 13%, and the filter cake is sent to the electromagnetic dryer for drying through the screw conveyor. The moisture content of the final product is low at 3%.

Claims (6)

1. A molybdenum concentrate dehydration and drying system is characterized in that the system comprises a flotation machine, a mixing tank, a diaphragm filter press, a buffer ore bin, an electromagnetic dryer, a mixer and an automatic packaging machine successively, and the molybdenum after flotation The concentrate is transported to the mixing tank, and the slurry in the mixing tank is sent to the diaphragm filter press for pressure filtration, and the filter cake after pressure filtration is sent to the buffer ore bin, then transported to the electromagnetic dryer for drying and fed to the mixer. 2. The molybdenum concentrate dehydration drying system according to claim 1, characterized in that the molybdenum concentrate is transported to the mixing tank by a delivery pump after flotation. 3. The molybdenum concentrate dehydration and drying system according to claim 1, characterized in that a frequency conversion feeding pump is arranged between the mixing tank and the membrane filter press to feed the slurry in the mixing tank to the membrane filter press. 4. The molybdenum concentrate dehydration drying system according to claim 1 or 3, characterized in that the membrane filter press is equipped with an air compressor. 5. The molybdenum concentrate dehydration drying system according to claim 1, characterized in that the buffer bin and the electromagnetic dryer are equipped with frequency conversion screw conveyors for sending the materials in the buffer bin to the electromagnetic dryer. 6. The molybdenum concentrate dehydration drying system according to claim 1, characterized in that the dried material is fed into the mixer through a screw conveyor and a bucket elevator.