CN204752774U - A multi-material material preparation system for blast furnace under centralized weighing mode - Google Patents

Abstract

The utility model provides a concentrate blast furnace multiple material kind system of prepareeing material under weighing mode, including conveyor belt, conveyor belt's top is equipped with a plurality of ore storehouses along its length direction in proper order, be equipped with batcher and ore shale shaker from top to bottom between ore storehouse and the conveyor belt in proper order, batcher and ore shale shaker are the same and the one-to-one with ore storehouse quantity, conveyor belt terminal below is equipped with the ore and concentrates the weighing hopper, conveyor belt is connected with the conveyor belt motor. The utility model discloses the system of prepareeing material can realize the concentration of many kinds of ore and weigh the prepareeing material to can guarantee weighing precision of ore, satisfy the cloth requirement of the complicated furnace charge of blast furnace, effectively improve the production efficiency and the production quality of blast furnace, degree of automation is high moreover, operating personnel low in labor strength.

Description

A multi-material material preparation system for blast furnace under centralized weighing mode

technical field

The utility model belongs to the technical field of ore weighing, and relates to a blast furnace multi-material material preparation system in a centralized weighing mode.

Background technique

In the blast furnace under the centralized weighing mode of the ore tank, the bottom of the tank is generally composed of multiple ore bins and corresponding feeders, vibrating screens, belt conveyors, weighing buckets and other equipment to complete the screening and weighing of ores. . The coke and ore discharged from the coke bin and ore bin under the trough are transported to the centralized weighing hopper by the main conveying belt, and are transported to the top of the furnace by the feeding truck according to the set batching material list procedure, and the material is distributed into the furnace. In recent years, due to the shortage of ore resources, iron-making enterprises have used more and more types of iron ore with different qualities. Taking Jiuquan Iron and Steel Plant as an example, in 2011 alone, there were 13 kinds of pellets used. , There are 7 types of lump ore materials, and 8 types of concentrate materials. In order to make the blast furnace adapt to complex raw materials and fuels, it is necessary to fully mix all kinds of mineral materials and load them into the blast furnace.

However, after the blast furnace under the centralized weighing method is put into production, the traditional program bill of materials has been used for batching, and a weighing hopper is opened at the same time to discharge and measure. Whether it is a 4-car system or a 6-car system, a maximum of 2-3 car mines can be set in each program of the bill of materials. It is impossible to set all kinds of mines in the program. If you want to add more ingredients, you can only set them in other programs. Post operators need to frequently change the material type manually in the screen, which not only increases the labor intensity of the post workers, but also may affect production if the material is not changed in time. Loading in batches, the minerals with uneven quality cannot be fully mixed and then distributed into the furnace. It is not a mixed charge, and cannot provide raw materials with reasonable pH for the blast furnace, which seriously affects the blast furnace condition and various economic technologies. Indicators, such a system, batching accuracy and cloth efficiency are far from meeting the requirements of production.

Although skilled operators in production can use manual methods to mix and prepare multiple materials, operators must calculate and verify the measurement of various materials during the material preparation process. In this way, first: it will greatly increase the preparation time; second: the accuracy of the ratio of various materials cannot be guaranteed; third: it will virtually increase the labor intensity of the operator. Such material preparation efficiency is far from meeting the requirements of blast furnace smelting.

Utility model content

The purpose of the utility model is to provide a blast furnace multi-material material preparation system in a centralized weighing mode with high weighing efficiency and high accuracy in view of the problems existing in the prior art.

For this reason, the utility model adopts following technical scheme:

A blast furnace multi-material material preparation system under the centralized weighing method, including a conveyor belt, a number of ore bins are sequentially arranged on the upper side of the conveyor belt along its length direction, and feeders are arranged successively between the ore bins and the conveyor belt. Feeder and ore vibrating screen, the number of the feeder and ore vibrating screen is the same as that of the ore bins and correspond one by one, the ore centralized weighing bucket is provided under the end of the conveyor belt, and the conveyor belt is connected to the conveyor belt motor .

Further, a coke bin is provided on one side of the end of the conveying belt, and a coke vibrating screen and a coke centralized weighing hopper are arranged in sequence below the coke bin.

Further, the system also includes an upper computer and a PLC controller, and the PLC controller is respectively connected with the upper computer, the feeder, the ore vibrating screen, the conveyor belt motor and the ore centralized weighing hopper.

The beneficial effect of the utility model is that: it can realize the centralized weighing and preparation of multiple types of ores, and can ensure the weighing accuracy of the ores, which meets the requirements of the complex charge distribution of the blast furnace, and effectively improves the production efficiency and production quality of the blast furnace; and The system of the utility model has high degree of automation, low labor intensity of operators, high safety, and is not prone to problems such as stockpiling and overloading of electrical equipment.

Description of drawings

Fig. 1 is the structural representation of the material preparation system of the utility model embodiment;

In the figure, 1-host computer, 2-PLC controller, 3-ore bin, 4-feeder, 5-ore vibrating screen, 6-conveyor belt, 7-conveyor belt motor, 8-ore centralized weighing bucket, 9-coke bin, 10-coke vibrating screen, 11-coke centralized weighing bucket.

Detailed ways

As shown in Figure 1, a blast furnace multi-material preparation system under the centralized weighing method includes two sets of symmetrically arranged material preparation systems. Taking the left system in the figure as an example, it includes a conveyor belt 6, and the upper edge of the conveyor belt 6 There are four ore bins 3 in sequence in the length direction, and feeders 4 and ore vibrating screens 5 are arranged up and down between the ore bins 3 and the conveyor belt 6. The number of feeders 4, ore vibrating screens 5 and ore bins 3 The same and one-to-one correspondence, there is an ore centralized weighing bucket 8 under the end of the conveyor belt 6, and the conveyor belt 6 is connected to the conveyor belt motor 7; one side of the end of the conveyor belt 6 is provided with a coke bin 9, and the bottom of the coke bin 9 is sequentially A coke vibrating screen 10 and a coke centralized weighing bucket 11 are provided; the system also includes a host computer 1 and a PLC controller 2, and the PLC controller 2 communicates with the host computer 1, the feeder 4, the ore vibrating screen 5, and the conveyor belt respectively. Motor 7 is connected with ore centralized weighing bucket 8.

A method for preparing multiple materials for a blast furnace in a centralized weighing mode, using the above-mentioned material preparation system, comprising the following steps:

(1) The ore bins correspond to ores of different types of materials. When weighing a certain type of ore, the ore is added to the corresponding ore bin, and the ore is sent to the ore vibrating screen through the feeder for screening. The ore with the required particle size falls on the surface of the conveyor belt and is sent into the ore centralized weighing hopper by the conveyor belt for weighing. The upper computer can obtain the weighing value of the ore in real time through the PLC controller. When the weighing value meets the requirements, the upper computer and the The PLC controller controls the feeder and ore vibrating screen corresponding to the ore bin to stop, and then weighs the next material type, so as to carry out centralized weighing of different types of ore;

(2) When weighing the coke, put the coke directly into the coke bin, and after the coke is screened by the coke vibrating screen, the coke that meets the particle size requirement falls into the coke weighing hopper for separate weighing;

(3) When weighing multiple types of ores, set a weighing pre-full value Mi for different types of ores. When the set weighing value of the ore to be weighed is greater than its weighing pre-full value Mi, Use the pre-full capacity control method for weighing control; when the set weighing value of the ore to be weighed is less than or equal to its weighing pre-full value Mi, use the time control method for weighing control;

(4) The pre-full capacity control method is specifically: during the weighing process of one of the ores, when the difference between the set weighing value of the ore and the actual weighing value is less than the weighing pre-full value Mi, the host computer And the PLC controller controls the feeder and ore vibrating screen corresponding to the ore to stop, and then weighs the next material type, and the weighing sequence of the material type is not limited;

(5) The time control method is as follows: set the start-stop time of the vibrating screen corresponding to the material ore according to the set weighing value, that is, the working time Ti of the vibrating screen (the size of Ti is based on the set weighing value and Different specific settings for different materials), after the ore enters the corresponding ore bin, when the working time of the vibrating screen reaches the set working time length Ti, the feeder and ore corresponding to the ore are controlled by the host computer and PLC controller The vibrating sieve stops, and then the weighing of the next material is carried out, and the weighing sequence of the next material in this control mode is also not limited.

Claims (3)

1. A blast furnace multi-material material preparation system under a centralized weighing mode, characterized in that it includes a conveyor belt, and the top of the conveyor belt is sequentially provided with a number of ore bins along its length direction, and the distance between the ore bin and the conveyor belt A feeder and an ore vibrating screen are arranged in sequence up and down in the room, and the number of the feeder and the ore vibrating screen is the same as that of the ore bin and corresponds one by one. The ore centralized weighing bucket is provided under the end of the conveyor belt. The belt is connected with a conveyor belt motor. 2. The blast furnace multi-material material preparation system under a centralized weighing method according to claim 1, wherein a coke bin is provided on one side of the end of the conveyor belt, and a coke bin is arranged below the coke bin in turn. Coke vibrating screen and coke centralized weighing bucket. 3. the blast furnace multi-material kind material preparation system under a kind of centralized weighing mode according to claim 1, is characterized in that, described system also comprises upper computer and PLC controller, and described PLC controller is respectively connected with upper computer, The feeder, ore vibrating screen, conveyor belt motor and ore centralized weighing bucket are connected.