A vanadium-titanium magnetite ball mill tailings treatment system and process

Abstract

This invention discloses a vanadium-titanium magnetite ball mill tailings disposal system and process, relating to the field of vanadium-titanium magnetite screening technology. The main purpose of this invention is to solve the problem of low-grade iron concentrate produced by existing vanadium-titanium magnetite screening systems and processes. The proposed technical solution includes a feeding assembly, a first-stage ball mill assembly, a second-stage ball mill assembly, and a final tailings bin. These components are sequentially connected: the feeding assembly, the first-stage ball mill assembly, a first reflux channel, a first-stage coarse magnetic separator, and the final tailings bin. The first reflux channel sequentially connects to the first-stage ball mill assembly, the second-stage ball mill assembly, the second-stage fine magnetic separator, and the final tailings bin. The second-stage ball mill assembly connects to the second reflux channel and the final tailings bin. The second reflux channel connects to the first-stage coarse magnetic separator. The outlet of the second-stage fine magnetic separator connects to the third-stage fine magnetic separator and the final tailings bin. The outlet of the third-stage fine magnetic separator connects to a filter and the final tailings bin. This vanadium-titanium magnetite ball mill tailings disposal system and process achieves the goal of increasing both production and quality.

Description

Technical Field

[0001] This invention relates to the field of vanadium-titanium magnetite screening technology, specifically to a vanadium-titanium magnetite ball mill tailings processing system and process. Background Technology

[0002] The ore type in the Panxi region is vanadium-titanium magnetite, and the iron production process involves magnetic separation using wet magnetic separators. The ore used in daily production is low-grade vanadium-titanium magnetite, employing a two-stage ball milling and three-stage magnetic separation process. Due to the low ore grade, production is relatively difficult, resulting in some limitations in output.

[0003] Therefore, based on the existing process, tailings removal magnetic separators are installed on both stages of the ball mill for tailings removal. The magnetic separation tailings removal in the first stage of the ball mill can effectively remove large particles of waste rock and other products from low-grade vanadium-titanium magnetite, thereby improving the mill's processing capacity. Based on the current implementation results, it is clear that adding tailings removal technology to the ball mill plays a crucial role in increasing both production and quality. Summary of the Invention

[0004] The purpose of this invention is to provide a ball mill tailings processing system and process for vanadium-titanium magnetite, in order to solve the problem that the iron concentrate screened using existing vanadium-titanium magnetite screening systems and processes has a low grade.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A vanadium-titanium magnetite ball mill tailings processing system includes a feeding assembly, a first-stage ball mill assembly, a second-stage ball mill assembly, and a final tailings bin. The outlet end of the feeding assembly is connected to the inlet end of the first-stage ball mill assembly. The outlet end of the first-stage ball mill assembly is connected to the inlet end of a first reflux channel, the inlet end of a first-stage coarse magnetic separation, and the final tailings bin. The outlet end of the first reflux channel is connected to the inlet end of the first-stage ball mill assembly. The outlet end of the first-stage coarse magnetic separation is connected to the inlet end of the second-stage ball mill assembly, the inlet end of a second-stage fine magnetic separation, and the final tailings bin. The outlet end of the second-stage ball mill assembly is connected to the inlet end of a second reflux channel and the final tailings bin. The outlet end of the second reflux channel is connected to the inlet end of the second-stage ball mill assembly and the inlet end of the second-stage fine magnetic separation. The outlet end of the second-stage fine magnetic separation is connected to the inlet end of a third-stage fine magnetic separation and the final tailings bin. The outlet end of the third-stage fine magnetic separation is connected to the inlet end of a filter and the final tailings bin.

[0007] Furthermore, a ball mill assembly includes a ball mill and a first hydrocyclone. The outlet end of the feeding assembly is connected to the inlet end of the ball mill, the outlet end of the ball mill is connected to the inlet end of the first hydrocyclone, and the outlet end of the first hydrocyclone is connected to the first reflux channel and the inlet end of the coarse magnetic separator.

[0008] Furthermore, the ball mill assembly also includes a first magnetic separator, the inlet of which is connected to the outlet of the ball mill, and the outlet of which is connected to the inlet of the first hydrocyclone.

[0009] Furthermore, a second hydrocyclone is also included between the first coarse magnetic separator and the second ball mill assembly and the second fine magnetic separator. The outlet end of the first coarse magnetic separator is connected to the inlet end of the second hydrocyclone, and the outlet end of the second hydrocyclone is connected to the inlet end of the second ball mill assembly and the inlet end of the second fine magnetic separator, respectively.

[0010] Furthermore, a high-frequency fine screen is installed between the second hydrocyclone and the second-stage fine magnetic separator. The outlet end of the second hydrocyclone is connected to the inlet end of the high-frequency fine screen, and the outlet end of the high-frequency fine screen is connected to the inlet end of the second-stage ball mill assembly, the inlet end of the second-stage fine magnetic separator, and the final tail bin, respectively.

[0011] Furthermore, a dewatering magnetic separator is also installed between the high-frequency fine screen and the two-stage ball mill assembly. The outlet end of the high-frequency fine screen is connected to the inlet end of the dewatering magnetic separator, and the outlet end of the dewatering magnetic separator is connected to the inlet end of the two-stage ball mill assembly and the main tail bin, respectively.

[0012] Furthermore, the two-stage ball mill assembly includes a two-stage ball mill and a second magnetic separator. The inlet end of the two-stage ball mill is connected to the outlet end of the first-stage coarse magnetic separator and the outlet end of the dewatering magnetic separator. The outlet end of the two-stage ball mill is connected to the inlet end of the second magnetic separator. The outlet end of the second magnetic separator is connected to the inlet end of the second reflux channel.

[0013] A vanadium-titanium magnetite ball mill tailings treatment process, employing a vanadium-titanium magnetite ball mill tailings treatment system, includes the following steps:

[0014] S1. The crude vanadium-titanium magnetite product is conveyed from the silo to a ball mill for ball milling via the feeding assembly. The product after ball milling is then conveyed to the first magnetic separator for the first magnetic separation. The concentrate after magnetic separation enters the first hydrocyclone for hydraulic classification. The tailings after magnetic separation are discarded. The concentrate after hydraulic classification enters a coarse magnetic separator. The tailings after hydraulic classification enter the first reflux channel and return to the ball mill at one end. The concentrate and tailings obtained after the coarse magnetic separation are discarded. The concentrate after the coarse magnetic separation enters the second hydrocyclone for hydraulic classification.

[0015] S2. The coarse ore that has been hydraulically classified in the second hydrocyclone in step S1 enters the second-stage ball mill, and then undergoes a first-stage fine magnetic separation by the second magnetic separator before entering the second reflux channel back to the second hydrocyclone for hydraulic classification.

[0016] The concentrate after hydraulic classification in the second hydrocyclone is subjected to high-frequency fine screening. The oversize product after high-frequency fine screening enters the dewatering magnetic separator. The coarse ore after magnetic separation enters the second-stage ball mill. The tailings after magnetic separation are discarded. The undersize product after high-frequency fine screening enters the second-stage fine magnetic separation. The tailings obtained from the second-stage fine magnetic separation are discarded. The concentrate obtained from the second-stage fine magnetic separation enters the third-stage fine magnetic separation.

[0017] S3. The tailings obtained in step S2 through three-stage fine magnetic separation are discarded, and the concentrate obtained from the three-stage fine magnetic separation enters the filter. After filtration by the filter, the concentrate is recovered and treated with recycled water.

[0018] The present invention has the following beneficial effects:

[0019] This invention, by setting up a first-stage ball mill assembly and a second-stage ball mill assembly, as well as a first-stage coarse magnetic separation after the first-stage ball mill assembly, and a second-stage fine magnetic separation and a third-stage fine magnetic separation after the second-stage ball mill assembly, can increase the hourly throughput of the ball mill by 35.6%, while increasing the hourly output of iron concentrate by 27.8% and improving the grade of magnetite.

[0020] The present invention improves the particle size distribution of the first-stage grading process from 15-30% -200 mesh to approximately 65% ​​-200 mesh content in the final concentrate, raising the concentrate grade to 56%. For ore with a particle size of -15mm fed into the mill, this process increases the mill's hourly throughput from 70t / h to 95t / h, a 35.6% increase. Simultaneously, the iron concentrate grade increases from 55% to over 57%, and the hourly iron concentrate throughput increases from 18t / h to over 23t / h, a 27.8% increase, achieving both increased production and improved quality. Attached Figure Description

[0021] Figure 1 This is a system and process flow diagram of the present invention. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please refer to Figure 1This invention provides a vanadium-titanium magnetite ball mill tailings processing system, which includes a feeding assembly, a first-stage ball mill assembly, a second-stage ball mill assembly, and a total tailings bin. The feeding assembly is used to transport magnetite from the silo to the processing system. The feeding assembly generally uses an electric conveyor belt for feeding, with a drive motor model of YVP-132M-4. The feeding assembly uses a machine model of NN200,650(6+3). The feeding assembly is connected to the first-stage ball mill assembly, which is used for preliminary crushing of the magnetite. The outlet end of the first-stage ball mill assembly is connected to a first reflux channel, a first-stage coarse magnetic separator, and the total tailings bin. The first reflux channel is used to regrind the magnetite that was not crushed by the first-stage ball mill assembly for further crushing. The first-stage coarse magnetic separator is used for the first separation of minerals and tailings from the crushed magnetite. The total tailings bin is used to collect all tailings that flow away through the ditch.

[0024] The first reflux channel is connected to a ball mill assembly. The outlet of the first coarse magnetic separator is connected to the second ball mill assembly, the second fine magnetic separator, and the final tail bin. The second ball mill assembly is connected to the second reflux channel and the final tail bin. The second reflux channel is connected to the inlet of the second ball mill assembly and the second fine magnetic separator. The outlet of the second fine magnetic separator is connected to the third fine magnetic separator and the final tail bin. The outlet of the third fine magnetic separator is connected to the filter and the final tail bin.

[0025] The first-stage ball mill assembly includes a first-stage ball mill, a first magnetic separator, and a first hydrocyclone. The second-stage ball mill assembly includes a second-stage ball mill and a second magnetic separator. The inlet of the second-stage ball mill is connected to the outlet of the first-stage coarse magnetic separator, and the outlet of the second-stage ball mill is connected to the second magnetic separator. The second magnetic separator is connected to a second reflux channel. The inlet of the first magnetic separator is connected to the outlet of the first-stage ball mill, and the outlet of the first magnetic separator is connected to the inlet of the first hydrocyclone. The first-stage ball mill is model MQG2700x4500, and the second-stage ball mill is model MQG2400x4500.

[0026] The feeding assembly connects to a first-stage ball mill, which in turn connects to a first hydrocyclone. The outlet of the first hydrocyclone connects to a first reflux channel and a first-stage coarse magnetic separator. The first-stage coarse magnetic separator connects to a second hydrocyclone, whose outlet connects to a second-stage ball mill assembly and a second-stage fine magnetic separator. Both the first and second-stage ball mills are grate-type ball mills. The hydrocyclone model is FX610-GT, and it is used to separate the rough concentrate into an underflow and an overflow section.

[0027] The underflow from the first hydrocyclone enters a first-stage ball mill for regrinding, and the overflow from the first hydrocyclone enters a roughing stage. The rough concentrate enters a first-stage rough magnetic separator, and the tailings flow into the final tailings bin via a ditch. A high-frequency fine screen, model D5Z1216, is installed between the second hydrocyclone and the second-stage fine magnetic separator. The underflow from the second hydrocyclone enters a second-stage ball mill assembly for regrinding, and the overflow from the second hydrocyclone enters a high-frequency fine screen for screening. The outlet of the high-frequency fine screen is connected to the second-stage ball mill assembly, the second-stage fine magnetic separator, and the final tailings bin.

[0028] A dewatering magnetic separator is also installed between the high-frequency fine screen and the two-stage ball mill assembly. The outlet of the dewatering magnetic separator is connected to the two-stage ball mill assembly and the main tailings bin. The upper part of the high-frequency fine screen is dewatered by the dewatering magnetic separator and then enters the two-stage ball mill assembly for regrinding. The lower part of the high-frequency fine screen enters the two-stage fine magnetic separator and the three-stage fine magnetic separator to obtain the final concentrate.

[0029] A vanadium-titanium magnetite ball mill tailings treatment process, employing a vanadium-titanium magnetite ball mill tailings treatment system, includes the following steps:

[0030] S1. The crude vanadium-titanium magnetite product is conveyed from the silo to a ball mill for ball milling via the feeding assembly. The product after ball milling is then conveyed to the first magnetic separator for the first magnetic separation. The concentrate after magnetic separation enters the first hydrocyclone for hydraulic classification. The tailings after magnetic separation are discarded. The concentrate after hydraulic classification enters a coarse magnetic separator. The tailings after hydraulic classification enter the first reflux channel and return to the ball mill at one end. The concentrate and tailings obtained after the coarse magnetic separation are discarded. The concentrate after the coarse magnetic separation enters the second hydrocyclone for hydraulic classification.

[0031] S2. The coarse ore that has been hydraulically classified in the second hydrocyclone in step S1 enters the second-stage ball mill, and then undergoes a first-stage fine magnetic separation by the second magnetic separator before entering the second reflux channel back to the second hydrocyclone for hydraulic classification.

[0032] The concentrate after hydraulic classification in the second hydrocyclone is subjected to high-frequency fine screening. The oversize product after high-frequency fine screening enters the dewatering magnetic separator. The coarse ore after magnetic separation enters the second-stage ball mill. The tailings after magnetic separation are discarded. The undersize product after high-frequency fine screening enters the second-stage fine magnetic separation. The tailings obtained from the second-stage fine magnetic separation are discarded. The concentrate obtained from the second-stage fine magnetic separation enters the third-stage fine magnetic separation.

[0033] S3. The tailings obtained in step S2 through three-stage fine magnetic separation are discarded, and the concentrate obtained from the three-stage fine magnetic separation enters the filter. After filtration by the filter, the concentrate is recovered and treated with recycled water.

[0034] After using the vanadium-titanium magnetite ball mill tailings treatment system and process of this invention, the particle size of the first-stage classification is improved from 15-30% -200 mesh content to about 65% -200 mesh content in the final concentrate, and the concentrate grade is increased to 56%. For ore with a particle size of -15mm entering the mill, after processing by this process, the mill's hourly throughput increases from 70t / h to 95t / h, an increase of 35.6%. Simultaneously, the iron concentrate grade increases from 55% to over 57%, and the hourly iron concentrate throughput increases from 18t / h to over 23t / h, an increase of 27.8%, achieving the goal of increasing both production and quality.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vanadium-titanium magnetite ball mill tailings processing system, characterized in that, include: The system comprises a feeding assembly, a first-stage ball mill assembly, a second-stage ball mill assembly, and a final tail hopper. The outlet end of the feeding assembly is connected to the inlet end of the first-stage ball mill assembly. The outlet end of the first-stage ball mill assembly is connected to the inlet end of the first reflux channel, the inlet end of the first-stage coarse magnetic separator, and the final tail hopper. The outlet end of the first reflux channel is connected to the inlet end of the first-stage ball mill assembly. The outlet end of the first-stage coarse magnetic separator is connected to the inlet end of the second-stage ball mill assembly, the inlet end of the second-stage fine magnetic separator, and the final tail hopper. The outlet end of the second-stage ball mill assembly is connected to the inlet end of the second reflux channel and the final tail hopper. The outlet end of the second reflux channel is connected to the inlet end of the second-stage ball mill assembly and the inlet end of the second-stage fine magnetic separator. The outlet end of the second-stage fine magnetic separator is connected to the inlet end of the third-stage fine magnetic separator and the final tail hopper. The outlet end of the third-stage fine magnetic separator is connected to the inlet end of the filter and the final tail hopper. The ball mill assembly includes a ball mill and a first hydrocyclone. The outlet end of the feeding assembly is connected to the inlet end of the ball mill, the outlet end of the ball mill is connected to the inlet end of the first hydrocyclone, and the outlet end of the first hydrocyclone is connected to the first reflux channel and the inlet end of a coarse magnetic separator. The ball mill assembly further includes a first magnetic separator, the inlet end of which is connected to the outlet end of the ball mill, and the outlet end of which is connected to the inlet end of the first hydrocyclone. A second hydrocyclone is also included between the first coarse magnetic separator, the second ball mill assembly, and the second fine magnetic separator. The outlet end of the first coarse magnetic separator is connected to the inlet end of the second hydrocyclone, and the outlet end of the second hydrocyclone is connected to the inlet end of the second ball mill assembly and the inlet end of the second fine magnetic separator, respectively. A high-frequency fine screen is provided between the second hydrocyclone and the two-stage fine magnetic separator. The outlet end of the second hydrocyclone is connected to the inlet end of the high-frequency fine screen. The outlet end of the high-frequency fine screen is connected to the inlet end of the two-stage ball mill assembly, the inlet end of the two-stage fine magnetic separator, and the main tail bin, respectively. A dewatering magnetic separator is also provided between the high-frequency fine screen and the two-stage ball mill assembly. The outlet end of the high-frequency fine screen is connected to the inlet end of the dewatering magnetic separator, and the outlet end of the dewatering magnetic separator is connected to the inlet end of the two-stage ball mill assembly and the main tail bin, respectively. The two-stage ball mill assembly includes a two-stage ball mill and a second magnetic separator. The inlet end of the two-stage ball mill is connected to the outlet end of the first-stage coarse magnetic separator and the outlet end of the dewatering magnetic separator. The outlet end of the two-stage ball mill is connected to the inlet end of the second magnetic separator. The outlet end of the second magnetic separator is connected to the inlet end of the second reflux channel.

2. A ball milling tailings treatment process for vanadium-titanium magnetite, characterized in that, The vanadium-titanium magnetite ball mill tailings processing system described in claim 1 is used for processing, comprising the following steps: S1. The crude vanadium-titanium magnetite product is conveyed from the silo to the first ball mill via the feeding assembly for ball milling. The product after ball milling is then conveyed to the first magnetic separator for the first magnetic separation. The concentrate after magnetic separation enters the first hydrocyclone for hydraulic classification. The tailings after magnetic separation are discarded. The concentrate after hydraulic classification enters the first coarse magnetic separator. The tailings after hydraulic classification enter the first reflux channel and return to the first ball mill. The concentrate and tailings obtained after the first coarse magnetic separator are discarded. The concentrate after the first coarse magnetic separator enters the second hydrocyclone for hydraulic classification. S2. The coarse ore that has been hydraulically classified in the second hydrocyclone in step S1 enters the second-stage ball mill, and then undergoes a first-stage fine magnetic separation by the second magnetic separator before entering the second reflux channel back to the second hydrocyclone for hydraulic classification. The concentrate after hydraulic classification in the second hydrocyclone is subjected to high-frequency fine screening. The oversize product after high-frequency fine screening enters the dewatering magnetic separator. The coarse ore after magnetic separation enters the second-stage ball mill. The tailings after magnetic separation are discarded. The undersize product after high-frequency fine screening enters the second-stage fine magnetic separation. The tailings obtained from the second-stage fine magnetic separation are discarded. The concentrate obtained from the second-stage fine magnetic separation enters the third-stage fine magnetic separation. S3. The tailings obtained in step S2 through three-stage fine magnetic separation are discarded, and the concentrate obtained from the three-stage fine magnetic separation enters the filter. After filtration by the filter, the concentrate is recovered and treated with recycled water.

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