CN115999755A - A Control System for Calcium Carbonate Fine Grinding with Improved Structure - Google Patents

Abstract

An improved calcium carbonate fine grinding control system relates to the technical field of calcium carbonate powder production. Including jaw crusher, fine jaw crusher, first bucket elevator, belt conveyor, raw material warehouse, vertical roller grinding machine, finished product collector, buffer warehouse, PLC control system and several finished product warehouses and fine grading device. In the present invention, after crushing and purifying the raw ore, it is fed into the vertical grinding roller machine through the air-lock feeder, blown up by the high-speed wind force of the fan and the grinding effect of the grinding roller, and the qualified powder is filtered through the separator. According to the particle size and fineness of calcium carbonate powder, it is classified and separated, so that the finished powder can be produced efficiently while obtaining high enough quality; the entire control system has reasonable design, high production capacity, and high production safety; the calcium carbonate The grinding control system has the advantages of compact structure, high raw ore utilization rate, high production safety, and energy-saving and high-efficiency effects.

Description

An Improved Structure Calcium Carbonate Fine Grinding Control System

technical field

The invention relates to the technical field of calcium carbonate powder production, in particular to a calcium carbonate fine grinding control system with an improved structure.

Background technique

In recent years, the utilization rate of calcium carbonate in various industries has increased rapidly. The market's requirements for calcium carbonate powder products mainly need to meet certain particle size distribution and particle shape requirements. The existing process design of the non-metallic ore grinding system has a low degree of automation and poor production safety. The finished powder has different sizes and sharp edges and corners, which do not meet market demand and increase production energy consumption. Therefore above-mentioned deficiency becomes the problem urgently in need of solving at present.

Contents of the invention

The purpose of the present invention is to solve the problems in the prior art, and propose a calcium carbonate ore fine grinding control system with an improved structure, which can prepare calcium carbonate powder with composite requirements, and can realize intelligent control, high safety, and low energy consumption integrated control system.

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

An improved calcium carbonate fine grinding control system, including jaw crusher, fine jaw crusher, first bucket elevator, belt conveyor, raw material warehouse, vertical grinding roller machine, finished product collector, buffer warehouse, PLC control system and several finished product warehouses and fine grading devices;

The lower end of the first bucket elevator is connected to the fine jaw crusher, the fine jaw crusher is connected to the jaw crusher, and the upper end of the first bucket elevator is connected to the raw material warehouse through a belt conveyor; the first bucket elevator The raw material powder transported by the elevator is transported to the raw material warehouse through the belt conveyor; the lower part of the raw material warehouse is connected with the lower end of the second bucket elevator through the belt scale, and the raw material powder is transported to the vertical grinding roller through the second bucket elevator machine;

The upper end of the second bucket elevator is connected with the vertical roller mill through the air lock feeder; the vertical roller mill is equipped with a motor for driving the roller to run; the vertical roller mill is installed The exhaust fan is used to blow the ground powder in the roller mill to pass through the upper separator and enter the finished product collector through the pipeline; the powder in the finished product collector flows into the buffer bin, and then is finely classified by the fine classification device , and finally packed into bags by a packaging machine.

Preferably, in the calcium carbonate fine grinding control system of the improved structure of the present invention, described fine grading device is made up of classifier, classification finished product collector, finished product bin and packaging machine, and the entrance of described classifier connects buffer bin, top The outlet is connected to the graded finished product collector, and the outlet at the bottom is connected to the screw conveyor through the precision air lock valve, the discharge end of the screw conveyor is connected to the bottom of the third bucket elevator, and the upper part of the third bucket elevator is connected to the finished product warehouse 1. The finished product warehouse is connected to the third warehouse, and the graded finished product collector is connected to the finished product warehouse one through a rigid air-locking discharge valve.

Preferably, in the calcium carbonate fine grinding control system of the improved structure of the present invention, the finished powder material after being ground by the vertical roller mill is transported to the buffer bin, and further transported to the classifier, and the finished product is finely treated; The high-quality fine powder is transported to the graded finished product collector, and flows into the finished product bin 1 through the rigid air lock discharge valve, and is packed into bags through the packaging machine below; while the coarse powder flows into the screw conveyor through the precision air lock discharge valve, After being conveyed by the third bucket elevator, it flows into the second and third warehouses of finished products, and is packed into bags by the packaging machine below.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. In the process of crushing and purifying raw ore, the present invention feeds it into the vertical grinding roller machine through the air-lock feeder, blows it up under the action of high-speed wind force of the fan and grinding roller, and filters it through the separator Qualified powder, and graded and separated according to the particle size of calcium carbonate powder, so that the finished powder can be produced efficiently while obtaining high enough quality; the entire control system has reasonable design, high production capacity, and high production safety; the The calcium carbonate grinding control system has the advantages of compact structure, high raw ore utilization rate, high production safety, and energy-saving and high-efficiency effects.

2. The present invention adopts the two-stage crushing method to control the fineness of raw ore crushing, so as to improve the efficiency and ensure the quality of the subsequent grinding. The multi-step buffering method is used together with the impurity removal device to remove the impurities contained in the raw ore and the impurities mixed in the grinding process, and the overall grinding speed can be controlled within a certain range. By setting the air volume regulating valve, the air volume and air pressure in the system are guaranteed to be stable, and the fluctuation of the quality index of the finished powder caused by the instantaneous flow rate is too large or too small is avoided.

Description of drawings

Fig. 1 is the structural representation of the calcium carbonate fine grinding control system of improved structure of the present invention.

The meanings of reference signs in the figure are:

1-jaw crusher, 2-fine jaw crusher, 3-the first bucket elevator, 31-iron remover, 4-raw material warehouse, 41-belt conveyor, 42-the first pulse bag filter, 43-belt scale, 44-rod gate, 5-vertical roller mill, 51-separator, 52-air lock feeder, 53-motor, 54-air volume control valve, 55-exhaust fan, 6-finished product collection Device, 7-buffer bin, 8-finished product bin, 81-rigid air lock valve, 82-classified finished product collector, 83-second pulse bag filter, 84-rotary feeder, 85-vibrator, 9-Packaging machine, 10-Classifying machine, 101-Precision air-lock feeding valve, 11-Screw conveyor.

Detailed ways

As shown in Figure 1, a kind of calcium carbonate fine grinding control system of improved structure that the present invention proposes, comprises jaw crusher 1, finely crushed jaw crusher 2, the first bucket elevator 3, belt conveyor 41 , raw material warehouse 4, vertical roller grinding machine 5, finished product collector 6, buffer warehouse 7, PLC control system, several finished product warehouses and fine grading device.

The lower end of the first bucket elevator 3 is connected to the fine jaw crusher 2, the fine jaw crusher 2 is connected to the jaw crusher 1, and the upper end of the first bucket elevator 3 is connected to the raw material warehouse through a belt conveyor 41 4. The raw ore is broken into small pieces by the jaw crusher 1 and the fine jaw crusher 2, and is continuously conveyed by the first bucket elevator 3; the raw material warehouse 4 plays the role of storing raw material powder; The raw material powder transported by the type elevator 3 is transported to the raw material bin 4 through the belt conveyor 41; the bottom of the raw material bin 4 is connected with the lower end of the second bucket elevator through the belt scale 43, and the raw material powder is transported by the second bucket elevator. Transport to the vertical roller mill 5. The belt scale 43 mainly controls the powder flow, so that sufficient and stable powder enters the vertical roller mill 5 .

An iron remover 31 is also installed on the connecting pipeline between the fine jaw crusher 2 and the first bucket elevator 3 for absorbing iron-containing debris in the ore. The entrance of the raw material bin 4 is equipped with a first pulse bag filter 42 for filtering the miscellaneous dust in the raw material; the outlet is equipped with a rod gate 44 for controlling the flow rate of the raw material.

The upper end of the second bucket elevator is connected to the vertical roller mill 5 through the airlock feeder 52, and the vertical roller mill 5 is the main part of the grinding device; the raw material to be processed passes through the belt from the raw material warehouse 4 Scale 43, the quantitative delivery of the second bucket elevator, the flow controlled by the air lock feeder 52 enters from the feed inlet of the vertical roller mill 5; a separator 51 is installed on the top of the vertical roller mill 5, and the separation The device 51 is used to separate and classify the powders of different particle sizes processed in the vertical grinding roller machine 5, and discharge them. If they meet the requirements of qualified size and particle size, the powders will be discharged, and if they fail to meet the requirements of size and particle size, they will continue to return to the grinding roller for further crushing; The vertical roller mill 5 is equipped with a motor 53, which is used to drive the roller to run; the vertical roller mill 5 is equipped with an exhaust fan 55, which is used to blow the powder milled in the roller mill through the upper separator. 51, and enter the finished product collector 6 through the pipeline; the powder in the finished product collector 6 flows into the buffer bin 7, and then undergoes fine grading treatment through the fine grading device, and is finally packed into bags by the packaging machine 9.

The outlet end of the exhaust fan 55 is equipped with an air volume regulating valve 54, which is mainly used to control the air volume and pressure in the mill, so as to improve the grinding efficiency and the particle size quality of the powder.

The fine grading device is composed of a classifier 10, a graded product collector 82, a finished product bin, and a packaging machine 9. The inlet of the classifier 10 is connected to the buffer bin 7, the top outlet is connected to the classified product collector 82, and the bottom outlet is passed through a precision lock. The air blowing material valve 101 is connected to the screw conveyor 11, and the discharge end of the screw conveyor 11 is connected to the bottom of the third bucket elevator, and the upper part of the third bucket elevator is connected to the finished product warehouse two and the finished product warehouse three, and the classification The finished product collector 82 is connected with the finished product bin 1 through a rigid air lock blanking valve 81 .

The finished powder after being ground by the vertical roller mill 5 is transported to the buffer bin 7, and further transported to the classifier 10 for fine treatment of the finished product. The high-quality fine powder is transported to the classified finished product collector 82, and flows into the finished product warehouse 1 through the rigid air-lock feeding valve 81, and is packed into bags by the packaging machine 9 below; The screw conveyor 11 is transported by the third bucket elevator, flows into the second and third finished product warehouses, and is packed into bags by the packaging machine 9 below.

The entrance of the finished product warehouse is equipped with a second pulse bag filter 83, which is used to filter the dust in the finished product powder; the wall of the finished product warehouse is equipped with a vibrator 84, which is used to prevent the powder from attaching to the warehouse; the outlet is installed with a rotary Feeder 85 is used to control the flow rate of finished powder.

In the present invention, after crushing and purifying the raw ore, it is fed into the vertical grinding roller machine through the lock air feeder, blown up by the high-speed wind force of the fan and the grinding effect of the grinding roller, and the qualified powder is filtered through the separator. According to the particle size and fineness of calcium carbonate powder, it is classified and separated, so that the finished powder can be produced efficiently and at the same time to obtain high enough quality; the entire control system is designed reasonably, with high production capacity and high production safety; the calcium carbonate The grinding control system has the advantages of compact structure, high raw ore utilization rate, high production safety, and energy-saving and high-efficiency effects.

The above content is only an example and description of the concept of the present invention. Those skilled in the art make various modifications or supplements to the described specific embodiments or replace them in similar ways, as long as they do not deviate from the concept of the invention Or beyond the scope defined in the claims, all should belong to the protection scope of the present invention.

Claims (8)

1. The calcium carbonate fine grinding control system with the improved structure is characterized by comprising a jaw crusher (1), a fine crushing jaw crusher (2), a first bucket elevator (3), a belt conveyor (41), a raw material bin (4), a vertical grinding roller machine (5), a finished product collector (6), a buffer bin (7), a PLC control system, a plurality of finished product bins and a fine classification device;

the lower end of the first bucket elevator (3) is connected with a fine crushing jaw crusher (2), the fine crushing jaw crusher (2) is connected with the jaw crusher (1), and the upper end of the first bucket elevator (3) is connected with a raw material bin (4) through a belt conveyor (41); the raw material powder transported by the first bucket elevator (3) is transported to a raw material bin (4) through a belt conveyor (41); the lower part of the raw material bin (4) is connected with the lower end of a second bucket elevator through a belt scale (43), and raw material powder is conveyed to a vertical grinding roller machine (5) through the second bucket elevator;

the upper end of the second bucket elevator is connected with the vertical grinding roller machine (5) through the air locking feeding machine (52); the vertical roller mill (5) is provided with a motor (53) for driving the roller mill to operate; the vertical roller mill (5) is provided with an exhaust fan (55) for blowing the powder ground in the roller mill to pass through the upper separator (51) and enter the finished product collector (6) through a pipeline; the powder in the finished product collector (6) flows into a buffer bin (7), then is finely classified by a fine classification device, and finally is packaged into bags by a packaging machine (9).

2. The calcium carbonate fine grinding control system with the improved structure according to claim 1, wherein the fine classifying device is composed of a classifier (10), a classified finished product collector (82), a finished product bin and a packaging machine (9), an inlet of the classifier (10) is connected with a buffer bin (7), a top outlet of the classifier is connected with the classified finished product collector (82), a bottom outlet of the classifier is connected with a screw conveyor (11) through a precise air-locking blanking valve (101), a discharging end of the screw conveyor (11) is connected with the bottom of a third bucket elevator, the upper part of the third bucket elevator is connected with a finished product bin two and a finished product bin three, and the classified finished product collector (82) is connected with a finished product bin one through a rigid air-locking blanking valve (81).

3. The calcium carbonate fine grinding control system with improved structure according to claim 2, wherein the finished product powder after grinding treatment by the vertical grinding roller machine (5) is conveyed to a buffer bin (7) and further conveyed to a classifier (10) for fine treatment of the finished product; the high-quality fine powder is conveyed to a classified finished product collector (82), flows into a finished product warehouse I through a rigid air locking blanking valve (81), and is packaged into bags through a packaging machine (9) below; coarse powder flows into a screw conveyor (11) through a precise air locking blanking valve (101), is conveyed by a third bucket elevator, flows into a finished product bin II and a finished product bin III, and is packaged into bags through a packaging machine (9) below.

4. A calcium carbonate fine grinding control system with improved structure according to claim 3, characterized in that the inlet of the finished product bin is provided with a second pulse bag type dust collector (83) for filtering the impurity dust in the finished product powder; a vibrator (84) is arranged on the wall of the finished product bin and is used for preventing powder from being attached in the bin; the outlet is provided with a rotary blanking device (85) for controlling the flow rate of the finished powder.

5. The improved calcium carbonate fine grinding control system according to any one of claims 1 to 4, characterized in that an iron remover (31) is also installed on the connecting pipe between the fine crushing jaw crusher (2) and the first bucket elevator (3) for adsorbing iron-containing trash in mineral aggregate.

6. The improved calcium carbonate fine grinding control system according to any one of claims 1 to 4, wherein the inlet of the raw material bin (4) is provided with a first pulse bag type dust collector (42) for filtering the impurity dust in the raw material; an outlet is provided with a bar gate (44) for controlling the flow rate of the feedstock.

7. The improved calcium carbonate fine grinding control system according to any one of claims 1 to 4, wherein the separator (51) at the top of the vertical grinding roll machine (5) is used for separating and classifying the powder materials with different particle sizes processed in the vertical grinding roll machine (5) for discharging, wherein the powder materials are discharged when the qualified size particle size requirement is met, and the powder materials are returned to the grinding roll for further grinding when the size particle size requirement is not met.

8. The improved calcium carbonate fine grinding control system according to any one of claims 1-4, wherein an air quantity adjusting valve (54) is arranged at the outlet end of the exhaust fan (55), and the air quantity and the air pressure in the grinding are mainly controlled, so that the grinding efficiency and the powder granularity quality are improved.

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