Production system for improving quality and reducing impurities of iron ore concentrate
By designing a production system with integrated iron concentrate pump, fully automatic washing and magnetic separator and anti-flotation device, the problem of difficulty in improving the Tfe grade of iron concentrate and reducing the content of S and Zn in the prior art is solved, and efficient iron concentrate quality and miscellaneous production is achieved, and product quality and output value efficiency are improved.
Patent Information
- Application Number
- CN202421590857.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-08
AI Technical Summary
The prior art is difficult to simultaneously improve the Tfe grade of iron concentrate and reduce its S and Zn impurities content, resulting in product quality not meeting standards and affecting output value efficiency.
A production system including an iron concentrate pump, a fully automatic washing and magnetic separator and a counterfloatment device was designed. Through the combination of a fully automatic washing and magnetic separator and a counterfloatment device, the multi-stage treatment and process switching of iron concentrate are realized, the Tfe grade is improved and the S and Zn impurities content is reduced.
Through this production system, the Tfe grade of iron concentrate can be effectively improved to more than 65%, and the S and Zn impurities content can be reduced to less than 0.35% and below 0.1%, meeting product quality requirements and improving product output value efficiency.
Smart Images
Figure CN222889933U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ore dressing, and relates to a production system for improving the quality and reducing impurities of iron concentrate, which is suitable for improving the Tfe grade of iron concentrate and reducing S and Zn impurities in the iron concentrate. Background Art
[0002] The properties of underground ore are changeable. The conventional magnetite beneficiation process is a stage grinding and stage separation process. The grade of the final iron concentrate is affected by the changes in the properties of the original ore. It is common for the iron concentrate to have Tfe < 65% or Zn > 0.1% or S > 0.35%. The product quality does not meet the standards, which in turn affects the product output value and benefits.
[0003] In the prior art, the washing magnetic separator is mainly used in the beneficiation process of magnetite beneficiation to improve the Tfe grade of the concentrate. However, the sulfur and zinc in the iron concentrate are difficult to remove by conventional magnetic separation process, while the reverse flotation process can effectively reduce the S and Zn impurity content in the iron concentrate.
[0004] How to cope with the changes of these three indicators (Tfe, S, Zn) in iron ore concentrate and flexibly organize an efficient production system to improve the quality and reduce impurities of iron ore concentrate is a practical technical problem that major ore selection plants need to solve. Utility Model Content
[0005] The present application discloses a production system for improving the quality and reducing impurities in iron concentrate, which effectively makes up for the lack of a production system in the prior art that can not only improve the Tfe grade of iron concentrate, but also reduce S and Zn impurities in the iron concentrate.
[0006] In order to achieve the above technical objectives, the technical solution adopted in this application is: a production system for improving the quality and reducing impurities of iron ore concentrate, comprising:
[0007] An iron concentrate pump, connected to the iron concentrate for processing;
[0008] A fully automatic elutriation magnetic separator, the access end of which is connected to the output end of the iron concentrate pump through valve 1, and the concentrate is directly outputted at one output end;
[0009] The reverse flotation device has two input ends, one of which is connected to the iron concentrate pump through valve 2, and the other is connected to the other output end of the fully automatic elutriation magnetic separator through an elutriation concentrate pump.
[0010] As an improved technical solution of the present application, the reverse flotation device includes a reverse flotation stirring barrel, a mechanical stirring flotation machine, a concentrate pipeline and a tailings pipeline which are connected in sequence.
[0011] As an improved technical solution of the present application, it also includes a washing concentrate switching device, the access end of which is connected to the output of the fully automatic washing magnetic separator, one output end directly outputs the concentrate, and the other output end is connected to the reverse flotation device through a washing concentrate pump.
[0012] As an improved technical solution of the present application, the iron concentrate pump is connected to the iron concentrate selected after two-stage grinding and three-stage weak magnetic separation processes.
[0013] As an improved technical solution of the present application, valve one and valve two adopt ceramic slurry valves of model DN200.
[0014] Beneficial Effects
[0015] By utilizing the concentrate output pipeline switching valve 1, switching valve 2 and the washing concentrate switching device, the iron concentrate quality improvement and impurity reduction production system can be flexibly changed, thus saving sorting costs and achieving efficient production.
[0016] The production system of the present application switches the process by using different iron concentrate sources, which can effectively ensure that Tfe ≥ 65%, Zn ≤ 0.1%, and S ≤ 0.35% in the output iron concentrate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the structure of a production system for improving the quality and reducing impurities of iron ore concentrate according to the present application is shown;
[0018] Figure 2 Draw Figure 1 A schematic diagram of the workflow of the production system;
[0019] Figure 3 Draw Figure 1 Schematic diagram of workflow 2 of the production system;
[0020] Figure 4 Draw Figure 1 Schematic diagram of the workflow of the production system three;
[0021] In the figure, 1. Iron concentrate pump; 2. Valve one; 3. Valve two; 4. Fully automatic elutriation magnetic separator; 5. Elutriation concentrate switching device; 6. Elutriation concentrate pump; 7. Reverse flotation device. DETAILED DESCRIPTION
[0022] definition:
[0023] The elutriation concentrate pump 6 refers to the delivery pump of the elutriation concentrate after the iron-containing concentrate is separated by the elutriation magnetic separator, and is used to deliver it to the reverse flotation system for S and Zn reduction;
[0024] The elutriation concentrate switching device 5 means that the elutriation concentrate can be switched to the reverse flotation device 7 according to production needs or directly enter the filtration and dehydration to form the final concentrate;
[0025] The reverse flotation device 7 mainly includes a reverse flotation stirring barrel, three 30 cubic mechanical stirring flotation machines, a concentrate pipeline, a tailings pipeline, and the like.
[0026] Valve 1 2 and valve 2 3 are both switching valves for the iron concentrate delivery pipeline. The iron concentrate enters two sorting systems (elution and reverse flotation sorting systems) by switching valve 1 2 and valve 2 3. The valve 1 and valve 2 use DN200 ceramic slurry valves.
[0027] like Figure 1 As shown, a production system for improving the quality of iron ore and reducing impurities, comprising
[0028] Iron concentrate pump 1, connected to the iron concentrate for processing;
[0029] A fully automatic elutriation magnetic separator 4, whose access end is connected to the output end of the iron concentrate pump 1 through a valve 2, and whose output end directly outputs the concentrate;
[0030] The reverse flotation device 7 has two input ends, one of which is connected to the iron concentrate pump 1 through valve 2 3, and the other input end is connected to the other output end of the fully automatic elutriation magnetic separator 4 through the elutriation concentrate pump 6. In the present application, the reverse flotation device 7 includes a reverse flotation stirring barrel, a mechanical stirring flotation machine, a concentrate pipeline and a tailings pipeline connected in sequence.
[0031] In some embodiments, an elutriation concentrate switching device 5 is further included, wherein the access end of the elutriation concentrate switching device 5 is connected to the output of the fully automatic elutriation magnetic separator, one output end directly outputs the concentrate, and the other output end is connected to the reverse flotation device 7 through the elutriation concentrate pump 6. The two output ends of the elutriation concentrate switching device 5 replace the two output ends of the fully automatic elutriation magnetic separator 4, that is, after the elutriation concentrate switching device 5 is installed, the output end of the fully automatic elutriation magnetic separator 4 is only connected to the elutriation concentrate switching device 5, and the elutriation concentrate switching device 5 realizes the switching of the two output ends.
[0032] A production system for improving the quality of iron ore and reducing impurities can implement workflows including workflow one, workflow two and workflow three.
[0033] like Figure 2 As shown, workflow 1:
[0034] Applicable iron concentrate indicators: Tfe < 65%, Zn ≤ 0.1%, S ≤ 0.35%, the main function is to improve the Tfe grade of iron concentrate. The iron concentrate is transported by the iron concentrate pump 1 through the fully automatic elutriation magnetic separator 4 for sorting. The elutriation concentrate uses the elutriation concentrate switching device 5 to directly enter the filtration process for dehydration to form the final concentrate. At this time, the concentrate output valve 1 2 is opened, the valve 2 3 is closed, and the elutriation concentrate switching device 5 is led to the filtration direction.
[0035] The specific process is as follows: the iron concentrate for processing is output to the full-automatic washing magnetic separator 4 through the iron concentrate pump 1 and valve 2, and after being processed by the full-automatic washing magnetic separator 4, the concentrate is directly output through an output end of the washing concentrate switching device 5.
[0036] like Figure 3 As shown, workflow 2:
[0037] Applicable iron concentrate indicators: Tfe ≥ 65%, Zn ≥ 0.1% or S ≥ 0.35%, the main function is to reduce the impurity grade of S and Zn in iron concentrate. The iron concentrate does not need to pass through the fully automatic washing magnetic separator 4, but is transported to the reverse flotation device 7 production system by the iron concentrate pump 1. The concentrate after reverse flotation enters the filtration process for dehydration to form the final concentrate. At this time, the concentrate output valve 1 2 is closed and the valve 2 3 is opened.
[0038] The specific process is as follows: the iron concentrate for processing is output to the reverse flotation device 7 through the iron concentrate pump 1 and the valve 2 3, and the concentrate is directly output after being processed by the reverse flotation device 7.
[0039] like Figure 4 As shown, workflow three:
[0040] Applicable iron concentrate indicators: Tfe <65%, Zn ≥ 0.1% or S ≥ 0.35%. The main function is to increase the Tfe grade of iron concentrate and reduce the S and Zn impurity grades of iron concentrate. The iron concentrate is first transported to the fully automatic elutriation magnetic separator 4 by the iron concentrate pump 1, and then transported to the reverse flotation device 7 by the elutriation concentrate pump 6. The concentrate after reverse flotation enters the filtration process for dehydration to form the final concentrate. At this time, the concentrate output valve 1 2 is opened, the valve 2 3 is closed, and the elutriation concentrate switching device 5 leads to the direction of the elutriation concentrate pump 6.
[0041] The specific process is as follows: the iron concentrate for processing is output to the fully automatic washing magnetic separator 4 through the iron concentrate pump 1 and valve 2. After being processed by the fully automatic washing magnetic separator 4, the other output end of the washing concentrate switching device 5 is connected to the reverse flotation device 7 through the washing concentrate pump 6. After being processed by the reverse flotation device 7, the concentrate is directly output.
[0042] The iron concentrate pump 1 is connected to the iron concentrate selected after two-stage grinding and three-stage weak magnetic separation processes.
[0043] Specific applications:
[0044] The sorting indicators of workflow one are shown in Table 1, the sorting indicators of workflow two are shown in Table 2, and the sorting indicators of workflow three are shown in Table 3.
[0045] Workflow 1 is mainly used to improve the Tfe grade of iron concentrate. The specific process is: the iron concentrate for treatment is output to the fully automatic elutriation magnetic separator 4 through the iron concentrate pump 1 and valve 1 2. After being processed by the fully automatic elutriation magnetic separator 4, the concentrate is directly output through an output end of the elutriation concentrate switching device 5. After the separation of workflow 1, the iron concentrate is increased from 64.7% to 65.32%, meeting the concentrate index requirements.
[0046] Workflow 2 is mainly used to reduce the Zn grade. The specific process is as follows: the iron concentrate for treatment is output to the reverse flotation device 7 through the iron concentrate pump and valve 2 3, and the concentrate is directly output after being processed by the reverse flotation device 7. After the separation of workflow 2, the Zn content in the iron concentrate is reduced from 0.15% to 0.064%, meeting the concentrate index requirements.
[0047] Workflow three is mainly used to improve the Tfe grade of iron concentrate and reduce the Zn grade and S sulfur grade in the iron concentrate. The specific process is: the iron concentrate for treatment is output to the fully automatic elutriation magnetic separator 4 through the iron concentrate pump 1 and valve 1 2. After being processed by the fully automatic elutriation magnetic separator 4, the other output end of the elutriation concentrate switching device 5 is connected to the reverse flotation device 7 through the elutriation concentrate pump 6. After being processed by the reverse flotation device 7, the concentrate is directly output. Through the separation of workflow three, the Tfe grade of the iron concentrate is increased from 64.34% to 65.08%, the Zn grade in the iron concentrate is reduced from 0.15% to 0.07%, and the S grade in the iron concentrate is reduced from 0.43 to 0.18%, meeting the concentrate index requirements.
[0048] Table 1: Workflow - Sorting Indicators
[0049] unit Yield Tf S Zn Iron Concentrate ％ 100 64.70 0.27 0.07 Concentrate ％ 98.72 65.32 0.26 0.065 Tailings ％ 1.28 16.76 1.39 0.073
[0050] Table 2: Workflow binary sorting indicators
[0051] unit Yield Tf S Zn Iron Concentrate ％ 100 65.15 0.42 0.15 Concentrate ％ 97.96 65.67 0.15 0.064 Tailings ％ 2.04 49.36 25.28 4.28
[0052] Table 3: Workflow three-stage sorting indicators
[0053] unit Yield Tf S Zn Iron Concentrate ％ 100 64.34 0.43 0.15 Concentrate ％ 97.77 65.08 0.18 0.07 Tailings 1 ％ 0.75 15.68 0.32 0.092 Tailings 2 ％ 1.48 40.36 17.25 5.62
Claims
1. A production system for improving the quality and reducing impurities of iron ore concentrate, characterized in that: include An iron concentrate pump, connected to the iron concentrate for processing; A fully automatic elutriation magnetic separator, the access end of which is connected to the output end of the iron concentrate pump through valve 1, and the concentrate is directly outputted at one output end; The reverse flotation device has two input ends, one of which is connected to the iron concentrate pump through valve 2, and the other is connected to the other output end of the fully automatic elutriation magnetic separator through an elutriation concentrate pump.
2. The production system for improving the quality and reducing impurities of iron ore concentrate according to claim 1, characterized in that: The reverse flotation device comprises a reverse flotation stirring barrel, a mechanical stirring flotation machine, a concentrate pipeline and a tailings pipeline which are connected in sequence.
3. The production system for improving the quality and reducing impurities of iron ore concentrate according to claim 1, characterized in that: It also includes an elutriation concentrate switching device, the access end of which is connected to the output of the full-automatic elutriation magnetic separator, one output end directly outputs the concentrate, and the other output end is connected to the reverse flotation device through an elutriation concentrate pump.
4. The production system for improving the quality and reducing impurities of iron ore concentrate according to claim 1, characterized in that: The iron concentrate pump is connected to the iron concentrate selected after two-stage grinding and three-stage weak magnetic separation processes.
5. The production system for improving the quality and reducing impurities of iron ore concentrate according to claim 1, characterized in that: The valve 1 and the valve 2 are ceramic slurry valves of DN200.