A semi-milling system for copper smelting slag

Abstract

The utility model discloses a kind of copper smelting slag semi-autogenous grinding systems, it includes electric-vibration feeder I, belt conveyor I, semi-autogenous mill, linear vibrating screen, de-ironer, ball mill, hydrocyclone, flotation machine, belt conveyor II, three-way distributor, electric-vibration feeder II, bucket elevator, vertical crusher;Copper smelting slag is after electric-vibration feeder I, belt conveyor I to semi-autogenous mill processing linear vibrating screen, screen underflow is sent hydrocyclone, sand is sent de-ironer after returning to three-way distributor;The material of three-way distributor is returned belt conveyor I by belt conveyor II, or is sent to vertical crusher processing by electric-vibration feeder II and bucket elevator and returns linear vibrating screen;The overflow of hydrocyclone is sent flotation machine, and sand is sent ball mill processing and returns hydrocyclone.The system can solve the problem that part of ore is more wear-resistant, is easy to accumulate in semi-autogenous mill and reduce semi-autogenous mill grinding efficiency.

Description

Technical Field

[0001] This utility model relates to a semi-autogenous grinding system for copper smelting slag, belonging to the technical field of crushing equipment. Background Technology

[0002] Non-ferrous metal smelting slag beneficiation mainly involves the secondary recovery and comprehensive utilization of valuable metals in smelting waste slag. This process primarily includes slag slow cooling, crushing, grinding, flotation, and dewatering. The grinding process often employs a semi-autogenous mill closed-circuit + ball mill closed-circuit grinding technology. Large pieces of smelting cooling slag are ground to a suitable particle size before entering the flotation operation. During the semi-autogenous mill grinding process, some wear-resistant ore is discharged through the gaps in the grate plates and screened by a vibrating screen. The oversize material is returned to the semi-autogenous mill via a closed-circuit belt conveyor. Because this portion of ore has high wear resistance, it easily accumulates within the semi-autogenous mill, reducing its grinding efficiency, increasing energy consumption, and affecting production capacity. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a semi-autogenous grinding system for copper smelting slag, which solves the problem that some ores have high wear resistance and tend to accumulate in the semi-autogenous grinding mill, reducing the grinding efficiency of the mill.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A semi-autogenous grinding system for copper smelting slag includes an electric vibrating feeder I, a belt conveyor I, a semi-autogenous grinding mill, a linear vibrating screen, an iron remover, a ball mill, a hydrocyclone, a flotation machine, a belt conveyor II, a three-way distributor, an electric vibrating feeder II, a bucket elevator, and a vertical crusher. The vibrating feeder I is used to feed copper smelting slag to belt conveyor I and then to a semi-autogenous mill for processing. The material processed by the semi-autogenous mill is fed to a linear vibrating screen. The undersize material from the linear vibrating screen is fed to a hydrocyclone for processing, and the back sand on the screen is fed to an iron remover and then to a three-way distributor. One end of the three-way distributor is located at the inlet of belt conveyor II, and the other end is located at the inlet of the vibrating feeder II. The material from belt conveyor II is fed to belt conveyor I. The material from the vibrating feeder II is fed to a bucket elevator and then to a vertical crusher for processing. The material processed by the vertical crusher is fed to a linear vibrating screen for processing. The overflow material from the hydrocyclone is fed to a flotation machine for processing, and the undersand from the hydrocyclone is fed to a ball mill for processing and then returned to the hydrocyclone for processing.

[0005] Furthermore, the material from belt conveyor II is then transported to belt conveyor I via belt conveyor III. The combined use of belt conveyors II and III effectively returns material to belt conveyor I and enables reversal of material transport, saving space occupied by the system equipment.

[0006] Furthermore, when the amount of returned sand on the linear vibrating screen exceeds 6 t / h, the returned sand is sent to the iron separator for processing, then to the three-way distributor, and finally to the electric vibrating feeder II. When the amount of returned sand is not greater than 6 t / h, the returned sand is sent to the iron separator for processing, then to the three-way distributor, and finally to the belt conveyor II. Using a returned sand amount of 6 t / h as the standard for process switching ensures that the semi-autogenous mill operates in its most economical state.

[0007] Furthermore, the particle size of the undersize material from the linear vibrating screen is no greater than 6 mm.

[0008] Furthermore, the particle size of the returned sand from the linear vibrating screen is in the range of 6 to 28 mm.

[0009] The workflow of the above-mentioned semi-autogenous grinding system for copper smelting slag is as follows: Large pieces of raw slag (particle size ≤ 200mm) after slow cooling and crushing are fed to belt conveyor I via vibrating feeder I. From belt conveyor I, the slag is then conveyed to a semi-autogenous mill for grinding (grinding media: steel balls). The ground material (particle size < 28mm) is discharged through a grate at the discharge end and then fed to a linear vibrating screen for preliminary screening. The undersize material (particle size ≤ 6mm) is fed to a hydrocyclone for further processing, while the oversize sand (particle size < 6mm) is processed by a hydrocyclone. Materials <28mm) are sent to a magnetic separator to remove broken steel balls, and then sent to belt conveyor II via a three-way distributor and then to belt conveyor I, or to electric vibrating feeder II via a three-way distributor and then to a bucket elevator. The bucket elevator then sends the material to a vertical crusher for processing. The processed material is sent to a linear vibrating screen for secondary screening. At the same time, the overflow material from the hydrocyclone is fed into a flotation machine for processing. The sediment from the hydrocyclone is sent to a ball mill for processing, and the processed material is returned to the hydrocyclone.

[0010] Compared with existing technologies, this technical solution has the following beneficial effects: This invention addresses the problem that after the slow cooling process, the ore from smelting slag has high hardness, making it difficult to effectively grind to the specified particle size using a semi-autogenous mill closed-circuit grinding system. This leads to problems such as increased return sand volume and increased operating current in the semi-autogenous mill. To ensure the economical operation of the semi-autogenous mill, a return sand crushing process is added, which is opposed to the return sand to the mill process. The process automatically switches according to the amount of return sand, keeping the semi-autogenous mill in the most economical operating state. This effectively enhances the mill's ability to cope with wear-resistant return sand, reduces the impact of difficult-to-grind return sand on the operating current and production capacity of the semi-autogenous mill, and simultaneously increases production capacity while reducing grinding energy consumption. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the equipment connection of the semi-autogenous grinding system for copper smelting slag described in Example 1.

[0012] Figure 2 This is a schematic diagram of the equipment connection of the semi-autogenous grinding system for copper smelting slag described in Example 2.

[0013] Figure reference numerals: 1-Electric vibratory feeder I, 2-Belt conveyor I, 3-Semi-autogenous mill, 4-Linear vibrating screen, 5-Iron separator, 6-Ball mill, 7-Hydrocyclone, 8-Flotation machine, 9-Belt conveyor II, 10-Three-way distributor, 11-Electric vibratory feeder II, 12-Bucket elevator, 13-Vertical crusher, 14-Belt conveyor III. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the embodiments. Specific experimental conditions and methods not specified in the following embodiments are generally conventional methods well known to those skilled in the art.

[0015] Example 1: As Figure 1 As shown, a semi-autogenous grinding system for copper smelting slag includes an electric vibrating feeder I, a belt conveyor I, a semi-autogenous grinding mill, a linear vibrating screen, an iron remover, a ball mill, a hydrocyclone, a flotation machine, a belt conveyor II, a three-way distributor, an electric vibrating feeder II, a bucket elevator, and a vertical crusher. The vibrating feeder I is used to feed copper smelting slag to belt conveyor I and then to a semi-autogenous mill for processing. The material processed by the semi-autogenous mill is fed to a linear vibrating screen. The undersize material from the linear vibrating screen is fed to a hydrocyclone for processing, and the back sand on the screen is fed to an iron remover and then to a three-way distributor. One end of the three-way distributor is located at the inlet of belt conveyor II, and the other end is located at the inlet of the vibrating feeder II. The material from belt conveyor II is fed to belt conveyor I. The material from the vibrating feeder II is fed to a bucket elevator and then to a vertical crusher for processing. The material processed by the vertical crusher is fed to a linear vibrating screen for processing. The overflow material from the hydrocyclone is fed to a flotation machine for processing, and the undersand from the hydrocyclone is fed to a ball mill for processing and then returned to the hydrocyclone for processing.

[0016] Example 2: As shown in the figure, a semi-autogenous grinding system for copper smelting slag includes an electric vibrating feeder I, a belt conveyor I, a semi-autogenous grinding mill, a linear vibrating screen, an iron remover, a ball mill, a hydrocyclone, a flotation machine, a belt conveyor II, a belt conveyor III, a three-way distributor, an electric vibrating feeder II, a bucket elevator, and a vertical crusher. The vibrating feeder I is used to feed copper smelting slag to belt conveyor I and then to a semi-autogenous mill for processing. The material processed by the semi-autogenous mill is fed to a linear vibrating screen. The undersize material from the linear vibrating screen is fed to a hydrocyclone for processing, and the back sand on the screen is fed to an iron remover and then to a three-way distributor. One end of the three-way distributor is located at the inlet of belt conveyor II, and the other end is located at the inlet of the vibrating feeder II. The material from belt conveyor II passes through belt conveyor III and then to belt conveyor I. The material from the vibrating feeder II is fed to a bucket elevator and then to a vertical crusher for processing. The material processed by the vertical crusher is fed to a linear vibrating screen for processing. The overflow material from the hydrocyclone is fed to a flotation machine for processing, and the undersand from the hydrocyclone is fed to a ball mill for processing and then returned to the hydrocyclone for processing.

[0017] The workflow of the semi-autogenous grinding system for copper smelting slag described in this embodiment is as follows: (1) After the smelting slag is slow cooled and crushed, the large raw ore (particle size ≤ 200 mm) is sent to belt conveyor I by electric vibrating feeder I, and then sent to semi-autogenous mill for grinding (grinding media is steel balls). The ground material obtained by the semi-autogenous mill is discharged through the grate plate at the discharge end (particle size of ground material < 28 mm), and then fed into linear vibrating screen for preliminary screening. (2) The undersize material (particle size not greater than 6mm) of the linear vibrating screen is fed into the hydrocyclone for processing. The overflow material after processing by the hydrocyclone is fed into the flotation machine for processing. The sediment from the hydrocyclone is sent to the ball mill for processing. The processed material is returned to the hydrocyclone. (3) The return sand (6mm < particle size < 28mm) on the screen of the linear vibrating screen is sent to the iron remover to remove the broken steel balls. When the amount of return sand on the screen of the linear vibrating screen is not greater than 6t / h, the return sand is sent to the belt conveyor II via the three-way distributor and then to the belt conveyor I. When the amount of return sand on the screen of the linear vibrating screen is greater than 6t / h, the return sand is sent to the electric vibrating feeder II via the three-way distributor and then to the bucket elevator. Then the bucket elevator sends the material to the vertical crusher for processing. The processed material is sent to the linear vibrating screen for secondary screening.

[0018] This utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A semi-autogenous grinding system for copper smelting slag, characterized in that: Including vibratory feeder I, belt conveyor I, semi-autogenous mill, linear vibrating screen, iron remover, ball mill, hydrocyclone, flotation machine, belt conveyor II, three-way distributor, vibratory feeder II, bucket elevator, and vertical crusher; The electric vibratory feeder I is used to send copper smelting slag to belt conveyor I and then to semi-autogenous mill for processing. The material processed by the semi-autogenous mill is sent to a linear vibrating screen; the undersize material of the linear vibrating screen is sent to a hydrocyclone for processing, and the sand on the screen is sent to an iron remover for processing and then to a three-way distributor; one end of the three-way distributor is located at the inlet end of the belt conveyor II, and the other end is located at the inlet end of the electric vibrating feeder II. The material from belt conveyor II is sent to belt conveyor I; the material from vibrating feeder II is sent to bucket elevator and then to vertical crusher for processing; the material processed by vertical crusher is sent to linear vibrating screen for processing. The overflow material from the hydrocyclone is sent to a flotation machine for processing, and the sediment from the hydrocyclone is sent to a ball mill for processing and then returned to the hydrocyclone for further processing.

2. The semi-autogenous grinding system for copper smelting slag according to claim 1, characterized in that: The material on belt conveyor II is then transported to belt conveyor I via belt conveyor III.

3. The semi-autogenous grinding system for copper smelting slag according to claim 1, characterized in that: When the amount of returned sand on the linear vibrating screen is greater than 6t / h, the returned sand is sent to the iron remover for treatment and then to the three-way distributor, and then to the electric vibrating feeder II. When the amount of returned sand is not greater than 6t / h, the returned sand is sent to the iron remover for treatment and then to the three-way distributor, and then to the belt conveyor II.

4. The semi-autogenous grinding system for copper smelting slag according to claim 1, characterized in that: The particle size of the material passing through the linear vibrating screen is no greater than 6 mm.

5. The semi-autogenous grinding system for copper smelting slag according to claim 1, characterized in that: The particle size of the returned sand from the linear vibrating screen is in the range of 6 to 28 mm.

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