CN216550619U - Short-flow granulating device for copper metallurgy blowing slag - Google Patents

Abstract

The utility model discloses a short-flow granulating device for copper metallurgy blowing slag, which comprises a slag box; an injector head of a high-pressure air injection unit is arranged on the slag box below the slag chute; the atomization spray head of the spray water unit is arranged on the top surface of the slag box; the temperature sensors of the temperature measuring unit are arranged on two sides of the slag box. According to the utility model, the high-speed airflow is sprayed out by the spray head to blow away and cool the blowing slag flowing down from the slag chute, and the spray water atomized by the atomizing spray head can effectively cool semi-solid slag particles, so that the slag particles are prevented from being adhered and hardened; the method does not need dehydration treatment and corresponding equipment, does not need a water circulation facility, shortens the whole production flow, effectively improves the reliability and safety of the granulating device, and reduces the water consumption and the production cost.

Description

Short-flow granulating device for copper metallurgy blowing slag

The technical field is as follows:

the utility model relates to the technical field of copper smelting, in particular to a short-process granulating device for copper metallurgy blowing slag.

Background art:

in the production process of pyrometallurgy copper, the blowing slag produced by the blowing furnace has high copper content and needs to be returned to the furnace for re-smelting, and because the blowing slag discharged by the blowing furnace is in a high-temperature molten state, the temperature reaches 1350 ℃, the blowing slag needs to be cooled, crushed or granulated before being returned to the smelting furnace; the existing cooling-crushing method generally adopts a treatment method that a slag casting machine is used for casting or a slag ladle is used for receiving molten blowing slag, and then the slag is subjected to slow cooling and then is intensively crushed, and the treatment method has the defects of large equipment floor area, long treatment flow, long treatment time, high cost and environmental pollution.

The granulation treatment comprises two modes of water quenching and air quenching: (1) water quenching, namely granulating and cooling the high-temperature melt by using high-pressure water, settling granulated slag particles at the bottom of a water pool, fishing out the slag particles by using a slag dragging machine, and dewatering for later use; (2) and air quenching, namely granulating the high-temperature melt by compressed air, spraying water mist for cooling, wherein the sprayed water amount is far larger than the water amount required for cooling slag particles, settling the granulated slag-water mixture in a storage bin, wherein the storage bin is made of a steel plate, and the bottom of the storage bin is provided with a scraper machine for outputting fluid slag particles containing a large amount of water, outputting the slag particles and dehydrating the slag particles for later use.

However, the two current granulation methods have the following problems:

(1) the flow is long, the water quenching needs to be carried out through the processes of slag salvaging, sedimentation, filter pressing, slag conveying and dehydration filtering, and the air quenching needs to be carried out through scraper conveying and dehydration treatment, so that the efficiency is low;

(2) the adopted equipment is multiple, the equipment used for water quenching comprises a slag conveyor, a thickener, a slurry pump, a circulating water tank and the like, and the equipment used for air quenching comprises a discharge bin, a scraper, a filter press, a slurry pump and a circulating water tank; the equipment is more, the occupied area is large, and the cost is high;

(3) the potential safety hazard is large, the blown slag in a molten state directly flows into a slag chute, or after a semi-molten adhesive hung at the tail end of the slag chute falls off, the blown slag directly contacts with a large amount of water, the water is decomposed into hydrogen and oxygen, and the instantaneous volume explosion occurs;

(4) the water consumption is large, the energy consumption is high, the labor is more than necessary, the depreciation is high, and the production cost is high;

(5) the reliability is poor, the used spray water is the circulating water of a circulating water pool, the water quality is poor, and equipment such as a stock bin, a scraper and the like are easy to corrode and damage; the particulate matter in the circulating water is many, and sediment grain and silt get into pump, pipeline and injector head, appear pump trouble, pipeline wearing and tearing easily, atomizer jam scheduling problem, in addition, the terminal bonding thing of sediment chute falls the back, makes the scraper blade machine trouble easily.

The utility model has the following contents:

the utility model aims to provide a short-process granulating device for copper metallurgy blowing slag, which has the advantages of short granulating process, high safety, less input equipment, low cost and high reliability;

the purpose of the utility model is implemented by the following technical scheme: a short-flow granulating device for copper metallurgy blowing slag comprises a slag chute, a slag pool, a slag box with an opening on the bottom surface, a high-pressure air injection unit, a spray water unit and a temperature measuring unit; the slag box is buckled above the slag pool, a box door is arranged at one end of the slag box and one end of the slag pool, the slag chute is arranged at the upper part of the other end of the slag box in a penetrating way, and the top surface of the slag box is communicated with a flue; the slag box below the slag chute is horizontally provided with an injection head of the high-pressure air injection unit; the atomization spray header of the spray water unit is arranged on the top surface of the slag box; and the temperature sensors of the temperature measuring unit are arranged on two sides of the slag box.

Further, the bottom of the slag pool is inclined downwards towards the box door.

Furthermore, two rows of the atomizing spray heads are symmetrically arranged on the top surface of the slag box relative to the slag chute, and the two rows of the atomizing spray heads are arranged in a splayed shape towards the slag chute.

Furthermore, the two sides of the slag box are respectively provided with the temperature sensor corresponding to each atomizing spray head.

Furthermore, a slag blocking plate is fixed in the slag box at a position close to the box door, and an operating platform is fixed on the outer wall of the slag box below the injection head.

Further, the high-pressure air injection unit comprises a compressor, a rotary joint and an injection head which are sequentially connected through an air pipe, wherein an air pressure gauge and an air switch valve are arranged on the air pipe.

Furthermore, the temperature measuring unit comprises an infrared thermometer and a plurality of temperature sensors; the infrared thermometer is arranged on the top surface of the slag box right above the outlet of the slag chute.

Furthermore, the spray water unit comprises a water pump, a water main pipe, a plurality of water branch pipes and the atomization spray header positioned at the tail end of each water branch pipe; the outlet of the water pump is communicated with the water inlet of the main water pipe, the water inlet of each water branch pipe is communicated with the main water pipe, and the water outlet of each water branch pipe is communicated with the corresponding atomizing spray header; the main water pipe is provided with a main water valve, and each branch water pipe is provided with a water regulating valve and a water flow meter.

Further, the wind pressure gauge, the infrared thermometer, the temperature sensor and the water flow meter are respectively and electrically connected with an input end of a controller, and an output end of the controller is respectively and electrically connected with the wind switch valve, the water main valve, the water regulating valve and the water pump.

The utility model has the advantages that:

(1) the spray head sprays high-speed airflow to blow away and cool the blown slag flowing from the slag chute, and spray water atomized by the atomizing spray head can effectively cool semi-solid slag particles, so that the slag particles are prevented from being adhered and hardened;

(2) the slag particles are fully contacted with the atomized water sprayed by the atomizing spray head in the diffusion process, and the atomized water is evaporated while the slag particles are cooled, so that the spray water quantity and the evaporated water quantity are balanced, and the water consumption is saved;

(3) the granulated slag dehydration treatment and corresponding equipment are not needed, and water circulation equipment is not needed, so that the flow is shortened;

(4) no water is accumulated in the granulating device, so that even if molten blowing slag flows down from the slag chute or a semi-molten chute tail end bonding object falls, the accident of water explosion can not occur, and the safety is high;

(5) the spray water does not need to be recycled, the water quality is good, and the service life and the reliability of the spray water unit are high.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a partially enlarged view of a in fig. 1.

Fig. 4 is a partially enlarged view B of fig. 2.

FIG. 5 is a schematic diagram of a control circuit according to the present invention.

The parts in the drawings are numbered as follows: the slag runner comprises a slag chute 1, a slag pool 2, a slag box 3, a box door 3.1, a high-pressure air injection unit 4, an injection head 4.1, an air pipe 4.2, a compressor 4.3, a rotary joint 4.4, an air pressure gauge 4.5, an air switch valve 4.6, a spray water unit 5, an atomization spray header 5.1, a water pump 5.2, a water main pipe 5.3, a water branch pipe 5.4, a water main valve 5.5, a water regulating valve 5.6, a water flowmeter 5.7, a temperature measuring unit 6, a temperature sensor 6.1, an infrared thermometer 6.2, a flue 7, a slag baffle 8, an operation platform 9 and a controller 10.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 5, the present embodiment provides a short-flow granulation apparatus for copper metallurgy blowing slag, which includes a slag chute 1, a slag bath 2, a slag box 3 with an opening on the bottom surface, a high-pressure air injection unit 4, a spray water unit 5 and a temperature measurement unit 6; the slag pool 2 comprises a pool bottom and an enclosing wall, the slag pool 2 is of a reinforced concrete structure subjected to waterproof treatment and used for receiving granulated converting slag, no operation equipment or steel structure is arranged in the slag pool 2, the structure is simple, safe and reliable, and high-temperature melt can directly flow in, so that the slag pool can be used as a safety pit in emergency; the height of the enclosing wall is more than one meter, so that the slag pool 2 has the capacity of storing granulated slag, the stored granulated slag can be cleaned and transported after a plurality of slag discharging and granulating operations, the cleaning frequency is reduced, and the operation efficiency is improved.

The slag box 3 is fastened and fixed on the top surface of the slag pool 2, and a box door 3.1 is arranged at one end of the slag box 3 and one end of the slag pool 2, so that a loader or workers can conveniently enter and clean granulated slag; the bottom of the slag pool 2 is arranged towards the 3.1 downward inclination of the box door, and the inclination of the inclination is 3: 100, the accumulated water on the ground flows towards the direction of 3.1 of the box door when the initial slag discharging granulation is carried out.

The other end of the slag box 3 is provided with a slag chute 1 in a penetrating way, and the high-temperature molten-state converting slag discharged by the converting furnace or poured out from the slag ladle enters the slag box 3 through the slag chute 1.

A spray head 4.1 of a high-pressure air spray unit 4 is horizontally arranged on a slag box 3 below the slag chute 1; the high-pressure air injection unit 4 comprises a compressor 4.3, a rotary joint 4.4 and an injection head 4.1 which are sequentially connected through an air pipe 4.2, high-speed air flow is provided by the compressor 4.3 and is introduced to the injection head 4.1 through the air pipe 4.2, the injection head 4.1 is used for ejecting the high-speed air flow to blow away and cool the blowing slag flowing down from the slag chute 1, and the rotary head is used for rotating the injection head 4.1 out of the slag box 3 when the system does not work, so that the injection head 4.1 is convenient to clean; an air pressure gauge 4.5 and an air switch valve 4.6 are arranged on the air pipe 4.2.

The atomization spray header 5.1 of the spray water unit 5 is arranged on the top surface of the slag box 3; the spray water unit 5 comprises a water pump 5.2, a main water pipe 5.3, 10 branch water pipes 5.4 and atomizing spray headers 5.1 positioned at the tail ends of the branch water pipes 5.4; an outlet of the water pump 5.2 is communicated with a water inlet of the main water pipe 5.3, a water inlet of each water branch pipe 5.4 is communicated with the main water pipe 5.3, a water outlet of each water branch pipe 5.4 is communicated with the corresponding atomizing spray header 5.1, spray water is introduced by the water pump 5.2 and is conveyed to each atomizing spray header 5.1 through the main water pipe 5.3 and each water branch pipe 5.4 in sequence, and the atomizing spray headers 5.1 enable water flow to be sprayed into the slag box 3 in a mist form; the main water pipe 5.3 is provided with a main water valve 5.5, and each branch water pipe 5.4 is provided with a water regulating valve 5.6 and a water flow meter 5.7.

As shown in fig. 2, two rows of atomizing spray heads 5.1 are symmetrically arranged on the top surface of the slag box 3 relative to the slag chute 1, and the two rows of atomizing spray heads 5.1 are arranged in a splayed shape towards the direction of the slag chute 1; the arrangement mode of the atomizing spray headers 5.1 is opposite to the diffusion direction of the slag particles, so that the contact area of the slag particles and atomized water in the diffusion process is increased, and the cooling effect is improved.

As shown in fig. 2, in this embodiment, 10 atomizing spray headers 5.1 arranged in 5 rows are provided in a manner of wrapping and diffusing slag particles, two atomizing spray headers 5.1 in each row are provided, and the distance between two adjacent rows is 2 to 3m, so that the spraying range of the atomizing spray headers 5.1 covers the first 15 to 17m of the spraying area of the slag blowing; because the slag particles within 10m from the outlet of the slag chute 1 are in a semi-solid state and are easy to adhere after being sprayed out under the action of high-pressure air, the semi-solid slag particles can be effectively cooled by spray water atomized by the atomizing spray head 5.1, and adhesion and hardening of the slag particles are avoided.

As shown in fig. 1, the temperature measuring unit 6 comprises 1 infrared thermometer 6.2 and 20 temperature sensors 6.1; the infrared thermometer 6.2 is arranged on the top surface of the slag box 3 right above the outlet of the slag chute 1 and is used for measuring the temperature of the upper surface of the chute.

The two sides of the slag box 3 are respectively provided with a temperature sensor 6.1 corresponding to each atomizing spray header 5.1, each side of the slag box 3 is provided with 10 temperature sensors 6.1 in the upper row and the lower row, the upper row and the lower row of the temperature sensors 6.1 form 5 rows, and two temperature sensors 6.1 in each row correspond to the atomizing spray headers 5.1 in each row, namely each atomizing spray header 5.1 corresponds to the upper temperature sensor 6.1 and the lower temperature sensor 6.1 on one side of the slag box 3.

The temperature sensors 6.1 at the upper row are as high as the spray head 4.1, and the distance between the temperature sensors 6.1 at the lower row and the temperature sensors 6.1 at the upper row is 2-4 m.

The installation and arrangement range of the temperature sensors 6.1 covers the area which is mainly dispersed and distributed after slag granulation, so that the measurement is convenient.

The wind pressure gauge 4.5, the infrared thermometer 6.2, the temperature sensor 6.1 and the water flowmeter 5.7 are respectively electrically connected with the input end of the controller 10; the output end of the controller 10 is respectively electrically connected with the wind switch valve 4.6, the water main valve 5.5, the water regulating valve 5.6 and the water pump 5.2.

The top surface of the slag box 3 is communicated with a flue 7, the flue 7 is connected with an exhaust fan and a dust removal purification system, under the action of the exhaust fan, dust, smoke and water vapor in the slag box 3 are pumped into the flue 7 and are treated by the dust removal purification system.

A slag blocking plate 8 is fixed in the slag box 3 at a position close to the box door 3.1 and used for blocking slag particles, so that impact on the box door 3.1 is avoided, and the service life of the box door 3.1 is ensured.

An operating platform 9 is fixed on the outer wall of the slag box 3 below the injector head 4.1, so that workers can clean the injector head 4.1 conveniently.

The working process is as follows:

(1) starting the high-pressure air injection unit 4:

firstly, whether the spray head 4.1 is blocked or not is manually checked, after the blockage is confirmed, the controller 10 controls the air switch valve 4.6 to be opened, the compressor 4.3 is started, high-pressure air is sprayed out from the spray head 4.1 through the air pipe 4.2, and at the moment, the air pressure in the pipe is measured in real time through the air pressure gauge 4.5.

(2) And 4, deslagging a slag tap or a slag ladle of the converting furnace, and enabling the high-temperature molten-state converting slag to flow into a slag chute 1.

(3) When the temperature detected by the infrared thermometer 6.2 reaches more than 800 ℃, the controller 10 controls the water main valve 5.5 to open, and the water pump 5.2 is started, the spray water enters the slag box 3 after being atomized by the atomizing spray head 5.1, when the blown slag flows down at the outlet of the slag chute 1, the high-speed air flow sprayed by the spray head 4.1 is blown into particles, the particles enter the slag box 3 in a dispersed state, the particles entering the slag box 3 at a high speed are beaten on the slag baffle plate 8, and the particles fall into the slag pool 2 after rebounding; meanwhile, the atomized spray water sprays and cools the dispersed slag particles, the slag particles are fully contacted with the atomized water sprayed by the atomized spray head 5.1 in the diffusion process, the temperature of the slag particles is reduced, and the atomized water is evaporated;

the air pressure gauge 4.5 detects the pressure of high-pressure air in real time and feeds the pressure back to the controller 10, and when the air pressure does not meet the requirement, the controller 10 controls the water pump 5.2 to be closed, so that the slag fluid is prevented from flowing into the slag pool 2 to explode when encountering water because the slag cannot be blown away and blown away;

each temperature sensor 6.1 is provided with a temperature interval on the controller 10, when the measured temperature exceeds the upper limit value of the temperature interval, the corresponding water regulating valve 5.6 is controlled by the controller 10 to increase the water spraying amount of the corresponding atomizing spray header 5.1, when the measured temperature is lower than the lower limit value of the temperature interval, the water regulating valve 5.6 is controlled to reduce the water spraying amount of the corresponding atomizing spray header 5.1 until the measured temperature is controlled in the temperature interval;

the motor driving the water pump 5.2 to act is a variable frequency motor, and when the control water regulating valve 5.6 cannot enable the measured temperature to reach a temperature range, the controller 10 regulates the motor frequency of the water pump 5.2 so as to enable the atomized water of the atomized spray header 5.1 to meet the temperature control requirement;

the temperature interval of each atomizing spray header 5.1 is determined by a test method according to the requirements of no accumulated water and no slag particle adhesion and hardening inside the slag pool 2; specifically, under the condition that the air pressure is ensured to be certain, the adhesion state of slag particles in the slag pool and the water accumulation condition in the slag pool at each time are observed by adjusting the water spraying amount of the atomizing spray header, the temperature of the corresponding sensor is recorded, the temperature setting range value of the temperature sensor is determined, and the temperature setting range value can be determined through 3-7 times of tests generally.

(4) When the temperature detected by the infrared thermometer 6.2 is lower than 800 ℃, the infrared thermometer 6.2 feeds back a signal to the controller 10, and the controller 10 controls the water pump 5.2, the water main valve 5.5, the compressor 4.3 and the air switch valve 4.6 to be closed.

(5) After 2-3 times of slag discharging and granulating operation according to the process, the box door 3.1 is opened, the loader enters the slag pool 2 to clean and store slag, and the box door 3.1 is closed after cleaning.

The utility model has the advantages that:

(1) the high-speed air current of injector head 4.1 blowout will be blown away from the blowing slag that the sediment chute 1 flows down and cool off, and the shower water after 5.1 atomizing spray header atomizing of rethread can effectively cool off semi-solid state slag grain, avoids the slag grain adhesion to harden.

(2) The slag particles are fully contacted with atomized water sprayed by the atomizing spray head 5.1 in the diffusion process, and the atomized water is evaporated while the slag particles are cooled, so that the spray water volume and the evaporation water volume are balanced, and the water consumption is saved.

(3) The dehydration treatment of the granulated slag and corresponding equipment are not needed, water circulation equipment is not needed, and the flow is shortened.

(4) The granulating device has no accumulated water, so that even if molten blowing slag flows down from the slag chute 1 or a semi-molten slag chute 1 tail end bonding object falls, the accident of water explosion can not occur, and the safety is high.

(5) The spray water does not need to be recycled, the water quality is good, and the service life and the reliability of the spray water unit 5 are high.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. A short-flow granulating device for copper metallurgy blowing slag is characterized by comprising a slag chute, a slag pool, a slag box with an opening on the bottom surface, a high-pressure air injection unit, a spray water unit and a temperature measuring unit;

the slag box is buckled above the slag pool, a box door is arranged at one end of the slag box and one end of the slag pool, the slag chute is arranged at the upper part of the other end of the slag box in a penetrating way, and the top surface of the slag box is communicated with a flue;

the slag box below the slag chute is horizontally provided with an injection head of the high-pressure air injection unit;

the atomization spray header of the spray water unit is arranged on the top surface of the slag box;

and the temperature sensors of the temperature measuring unit are arranged on two sides of the slag box.

2. The short-flow granulation device for copper metallurgy blowing slag according to claim 1, wherein the bottom of the slag bath is arranged to be inclined downwards towards the box door.

3. The short-flow granulation device for copper metallurgy blowing slag according to claim 1, characterized in that two rows of the atomizing spray heads are symmetrically arranged on the top surface of the slag box relative to the slag chute, and the two rows of the atomizing spray heads are arranged in a splayed shape towards the slag chute.

4. The short-flow granulation device for copper metallurgy blowing slag according to claim 3, wherein the temperature sensors corresponding to the atomizing spray heads are arranged on two sides of the slag box.

5. The short-flow granulating device of copper metallurgy blowing slag as claimed in claim 1, wherein a slag blocking plate is fixed in the slag box at a position close to the box door, and an operating platform is fixed on the outer wall of the slag box below the spray head.

6. The short-flow granulation device for copper metallurgy blowing slag according to any one of claims 1 to 5, wherein the high-pressure air injection unit comprises a compressor, a rotary joint and the injection head which are sequentially connected through an air pipe, and the air pipe is provided with an air pressure gauge and an air switch valve.

7. The short-flow granulation device for copper metallurgy blowing slag according to claim 6, wherein the temperature measuring unit comprises an infrared thermometer and a plurality of temperature sensors; the infrared thermometer is arranged on the top surface of the slag box right above the outlet of the slag chute.

8. The short-flow granulation device for copper metallurgy blowing slag according to claim 7, wherein the spray water unit comprises a water pump, a water main pipe, a plurality of water branch pipes and the atomizing spray header positioned at the tail end of each water branch pipe; the outlet of the water pump is communicated with the water inlet of the main water pipe, the water inlet of each water branch pipe is communicated with the main water pipe, and the water outlet of each water branch pipe is communicated with the corresponding atomizing spray header; the main water pipe is provided with a main water valve, and each branch water pipe is provided with a water regulating valve and a water flow meter.

9. The short-flow granulation device for copper metallurgy blowing slag according to claim 8, wherein the air pressure gauge, the infrared thermometer, the temperature sensor and the water flow meter are respectively and electrically connected with an input end of a controller, and an output end of the controller is respectively and electrically connected with the air switch valve, the water main valve, the water regulating valve and the water pump.

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