Iron ore screening system for preparing heavy concrete
By designing an iron ore screening system for heavy concrete preparation, hematite and red ore are separated by heavy medium cyclone, and the purity and particle grade continuity of hematite are improved through treatment lines and gradient screening, the problems of red ore separation and gradient screening in hematite treatment process in heavy concrete preparation are solved, and high-quality heavy concrete preparation is achieved.
Patent Information
- Application Number
- CN202420733304.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-10
AI Technical Summary
During the preparation of heavy concrete, red ore is mixed in hematite that is not suitable for aggregate, and hematite is highly brittle and easy to powder, and gradient screening is required to improve density, but the existing technology lacks effective red ore separation and gradient screening methods.
An iron ore screening system for heavy concrete preparation is designed, including heavy medium cyclones, hematite treatment lines and red ore treatment lines. Hematite and red ore are separated by heavy medium cyclone, and the red ore treatment lines and hematite treatment lines are treated and gradient screened separately to improve the purity and particle-grade continuity of hematite.
Effective separation of red ore in hematite is achieved, and the purity and particle grade continuity of hematite is improved, thereby ensuring the quality of heavy concrete and the smooth progress of the preparation process.
Smart Images
Figure CN222606660U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete preparation, in particular to an iron ore screening system used for preparing heavy concrete. Background Art
[0002] The cement concrete commonly used in engineering projects refers to ordinary aggregate concrete with an apparent density of 2400-2500kg / cubic meter. Heavy concrete refers to concrete that uses heavy aggregate and has an apparent density greater than 2600kg / cubic meter, generally made of hematite and barite.
[0003] In the preparation process of heavy concrete, the raw materials need to be processed first. When hematite is selected as aggregate, the purchased hematite is mixed with some associated red ore. The characteristics of red ore are not as good as hematite, but the color is similar. Red ore itself is not suitable as an aggregate for heavy concrete. In order to improve the quality of heavy concrete, it needs to be separated.
[0004] Secondly, due to the characteristics of hematite, such as high brittleness, easy pulverization and heavy weight, the ore needs to be washed and dried before processing, and the processed coarse aggregate and fine aggregate need to be graded and stacked separately. During use, they need to be combined into a state of continuous particle size in a certain proportion. At the same time, the density can be increased by improving the grading of coarse and fine aggregates to reduce the occurrence of segregation. Therefore, gradient screening is required in the processing steps of hematite to facilitate subsequent particle size mixing. Utility Model Content
[0005] The utility model provides an iron ore screening system for heavy concrete preparation, aiming to solve the problem of lack of red ore separation and gradient screening in the hematite treatment process of heavy concrete preparation.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0007] An iron ore screening system for heavy concrete preparation comprises a heavy medium cyclone, the overflow of the heavy medium cyclone is connected to a hematite processing line, and the underflow of the heavy medium cyclone is connected to a hematite processing line;
[0008] The hematite processing line includes a first-level hematite de-mediating screen, a hematite washing mechanism, a second-level hematite de-mediating screen and a hematite drying mechanism connected in sequence. The discharge end of the hematite drying mechanism is connected to a plurality of stages of vibrating screens connected in sequence at the end, and the screening particle sizes of the plurality of stages of vibrating screens decrease gradually along the conveying direction. The screening qualified discharge end of each stage of the vibrating screen is connected to a corresponding number of hematite collecting mechanisms.
[0009] Preferably, the feed end of the primary hematite de-mediating screen is connected to the bottom flow port of the heavy medium cyclone, the ore discharge end of the primary hematite de-mediating screen is connected to the feed end of the hematite washing mechanism, and the medium discharge end of the primary hematite de-mediating screen is connected to the heavy medium combining barrel.
[0010] As a more preferred embodiment, the ore conveying end of the hematite washing mechanism is connected to the feeding end of the hematite secondary de-mediating screen, and the ore discharging end of the hematite secondary de-mediating screen is connected to the hematite drying mechanism.
[0011] Furthermore, the drainage end of the hematite elution mechanism and the medium discharge end of the hematite secondary de-mediating screen are both connected to the light medium combining barrel.
[0012] Preferably, the red ore processing line comprises a red ore primary de-mediating screen, a red ore washing mechanism, a red ore secondary de-mediating screen, a red ore drying mechanism and a red ore collecting mechanism which are connected in sequence.
[0013] More preferably, the feed end of the red ore primary de-mediating screen is connected to the overflow port of the heavy medium cyclone, the ore discharge end of the red ore primary de-mediating screen is connected to the feed end of the red ore washing mechanism, and the medium discharge end of the red ore primary de-mediating screen is connected to the heavy medium combining barrel.
[0014] Furthermore, the ore conveying end of the red ore washing mechanism is connected to the feeding end of the red ore secondary de-mediating screen, the ore discharging end of the red ore secondary de-mediating screen is connected to the red ore drying mechanism, and the discharging end of the red ore drying mechanism is connected to the feeding end of the red ore collecting mechanism.
[0015] Furthermore, the drainage end of the red ore washing mechanism and the medium discharging end of the red ore secondary de-mediating screen are both connected to the light medium combining barrel.
[0016] Beneficial effects of the utility model:
[0017] The utility model separates the red ore mixed in the hematite by using the different densities of the red ore and the hematite through a heavy medium cyclone, thereby improving the purity of the hematite and ensuring the quality of the heavy concrete. When the hematite is subsequently processed, several levels of vibrating screens are used for gradient screening, and the screened hematite is collected separately, which is convenient for mixing in the subsequent preparation process. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the system flow of the utility model;
[0019] In the figure: 1. Heavy medium cyclone; 2. First-level de-mediating screen for red ore; 3. First-level de-mediating screen for hematite; 4. Heavy medium combining barrel; 5. Red ore leaching mechanism; 6. Hematite leaching mechanism; 7. Second-level de-mediating screen for red ore; 8. Second-level de-mediating screen for hematite; 9. Light medium combining barrel; 10. Red ore drying mechanism; 11. Red ore collecting mechanism; 12. Hematite drying mechanism. DETAILED DESCRIPTION
[0020] As follows, embodiments are further described with reference to the accompanying drawings.
[0021] like Figure 1 As shown, as a preferred embodiment 1, an iron ore screening system for preparing heavy concrete includes a heavy medium cyclone 1, the overflow port of the heavy medium cyclone 1 is connected to a hematite processing line, and the underflow port of the heavy medium cyclone 1 is connected to a hematite processing line;
[0022] The hematite processing line includes a hematite primary de-mediating screen 3, a hematite washing mechanism 6, a hematite secondary de-mediating screen 8 and a hematite drying mechanism 12 connected in sequence, the discharge end of the hematite drying mechanism 12 is connected to a plurality of vibrating screens connected in sequence at the end, and the screening particle sizes of the plurality of vibrating screens decrease gradually along the conveying direction, and the screening qualified discharge end of each vibrating screen is connected to a corresponding number of hematite collecting mechanisms.
[0023] Embodiment 1 provides an iron ore screening system for preparing heavy concrete. The device separates hematite and red ore through an existing heavy medium cyclone 1. The density of red ore is less than that of hematite. The red ore is washed out from the overflow port through the heavy medium cyclone 1, and the bottom flow port is hematite, thereby ensuring the purity of the hematite used in the preparation of heavy concrete and the quality of the heavy concrete.
[0024] The washed red ore enters the red ore processing line and is processed by existing equipment and then recycled, and the hematite enters the hematite processing line and is processed by existing equipment. The processing process includes recovering the heavy medium through the hematite first-level de-mediation screen 3, washing the heavy medium through the hematite elution mechanism 6, and recovering the residual water stains and light medium after washing through the hematite second-level de-mediation screen 8. Finally, the hematite is dried by the hematite drying mechanism 12. The dried hematite has completed the separation and pre-treatment operations for gradient screening. The dried hematite is gradient screened through several levels of vibrating screens, and the qualified materials in each gradient are separately collected by the corresponding hematite collection mechanism, which is convenient for mixing the hematite in the subsequent preparation of heavy concrete, ensuring that the continuous particle size of the hematite is in a good state and improving the quality of the heavy concrete.
[0025] As a preferred embodiment 2, the vibrating screen includes 1 to n levels, n≥3, and the number of hematite collecting mechanisms is consistent with the number of vibrating screens and corresponds one to one.
[0026] As a preferred embodiment 3, the feed end of the hematite primary de-medium screen 3 is connected to the bottom flow port of the heavy medium cyclone 1, the ore discharge end of the hematite primary de-medium screen 3 is connected to the feed end of the hematite leaching mechanism 6, and the medium discharge end of the hematite primary de-medium screen 3 is connected to the heavy medium combining barrel 4. The heavy medium is recovered and combined by the heavy medium combining barrel 4.
[0027] As a preferred embodiment 4, the ore conveying end of the hematite washing mechanism 6 is connected to the feeding end of the hematite secondary de-mediating screen 8, and the ore discharging end of the hematite secondary de-mediating screen 8 is connected to the hematite drying mechanism 12. The continuity of hematite processing is ensured.
[0028] As a preferred embodiment 5, the drainage end of the hematite leaching mechanism 6 and the medium discharge end of the hematite secondary de-mediation screen 8 are both connected to the light medium combination barrel 9. The light medium combination barrel 9 is used to recover the water containing the medium after spraying and the water containing the medium separated by the secondary de-mediation screen, and this part is recovered separately from the recovered heavy medium.
[0029] As a preferred embodiment 6, the red ore processing line includes a red ore primary de-mediating screen 2, a red ore washing mechanism 5, a red ore secondary de-mediating screen 7, a red ore drying mechanism 10 and a red ore collecting mechanism 11 which are connected in sequence.
[0030] The red ore processing line and the hematite processing line are the same in the previous steps except that gradient screening is not performed. The processing process includes recovering the heavy medium through the red ore primary de-mediation screen 2, cleaning the heavy medium through the red ore elution mechanism 5, recovering the residual water stains and light medium after cleaning through the red ore secondary de-mediation screen 7, and finally drying the red ore through the red ore drying mechanism 10. The dried red ore is directly recovered through the red ore collection mechanism 11.
[0031] As a preferred embodiment 7, the feed end of the red ore primary de-mediation screen 2 is connected to the overflow port of the heavy medium cyclone 1, the ore discharge end of the red ore primary de-mediation screen 2 is connected to the feed end of the red ore leaching mechanism 5, and the medium discharge end of the red ore primary de-mediation screen 2 is connected to the heavy medium combination barrel 4. The heavy medium is also recovered and combined by the heavy medium combination barrel 4, because both directly remove the heavy medium separation product, so the heavy medium is in the same state and can be collected synchronously, and the collected heavy medium can also be re-introduced into the heavy medium cyclone 1 for heavy medium separation operation.
[0032] As a preferred embodiment 8, the ore conveying end of the red ore washing mechanism 5 is connected to the feeding end of the red ore secondary de-mediation screen 7, the ore discharging end of the red ore secondary de-mediation screen 7 is connected to the red ore drying mechanism 10, and the discharging end of the red ore drying mechanism 10 is connected to the feeding end of the red ore collecting mechanism 11. The continuity of red ore processing is ensured.
[0033] As a preferred embodiment 9, the drainage end of the red ore leaching mechanism 5 and the medium discharge end of the red ore secondary de-mediation screen 7 are both connected to the light medium combination barrel 9. The light medium combination barrel 9 is also used to recover the water containing the medium after spraying and the water containing the medium separated by the secondary de-mediation screen. After leaching, the heavy medium has changed its state, and there is no need to collect it separately later. The light medium can be collected together and processed uniformly.
[0034] As a preferred embodiment 10, the density of the heavy medium is greater than that of red ore and less than that of hematite.
[0035] The working principle of this utility model:
[0036] The utility model provides an iron ore screening system for preparing heavy concrete. The device separates hematite and red ore through an existing heavy medium cyclone 1. The density of the red ore is less than that of the hematite. The red ore is washed out from the overflow port through the heavy medium cyclone 1, and the bottom flow port is hematite, thereby ensuring the purity of the hematite used in the preparation of heavy concrete and the quality of the heavy concrete.
[0037] The washed red ore enters the red ore processing line and is processed by existing equipment and then recycled, and the hematite enters the hematite processing line and is processed by existing equipment. The processing process includes recovering the heavy medium through the hematite first-level de-mediation screen 3, washing the heavy medium through the hematite elution mechanism 6, and recovering the residual water stains and light medium after washing through the hematite second-level de-mediation screen 8. Finally, the hematite is dried by the hematite drying mechanism 12. The dried hematite has completed the separation and pre-treatment operations for gradient screening. The dried hematite is gradient screened through several levels of vibrating screens, and the qualified materials in each gradient are separately collected by the corresponding hematite collection mechanism, which is convenient for mixing the hematite in the subsequent preparation of heavy concrete, ensuring that the continuous particle size of the hematite is in a good state and improving the quality of the heavy concrete.
Claims
1. Iron ore screening system for heavy concrete preparation, characterized in that, It comprises a heavy medium cyclone (1), wherein the overflow port of the heavy medium cyclone (1) is connected to a hematite processing line, and the underflow port of the heavy medium cyclone (1) is connected to a hematite processing line; The hematite processing line comprises a hematite primary de-mediating screen (3), a hematite leaching mechanism (6), a hematite secondary de-mediating screen (8) and a hematite drying mechanism (12) which are connected in sequence, wherein the discharge end of the hematite drying mechanism (12) is connected to a plurality of stages of vibrating screens which are connected in sequence end to end, and the screening particle sizes of the plurality of stages of vibrating screens decrease in a gradient along the conveying direction, and the screening qualified discharge end of each stage of the vibrating screen is connected to a corresponding number of stages of hematite collecting mechanisms.
2. The iron ore screening system for heavy concrete preparation according to claim 1, characterized in that: The feed end of the primary hematite de-mediating screen (3) is connected to the bottom flow port of the heavy medium cyclone (1), the ore discharge end of the primary hematite de-mediating screen (3) is connected to the feed end of the hematite leaching mechanism (6), and the medium discharge end of the primary hematite de-mediating screen (3) is connected to the heavy medium combining barrel (4).
3. The iron ore screening system for heavy concrete preparation according to claim 2, characterized in that: The ore conveying end of the hematite washing mechanism (6) is connected to the feeding end of the hematite secondary de-mediating screen (8), and the ore discharging end of the hematite secondary de-mediating screen (8) is connected to the hematite drying mechanism (12).
4. The iron ore screening system for heavy concrete preparation according to claim 3, characterized in that: The drainage end of the hematite leaching mechanism (6) and the medium discharge end of the hematite secondary de-mediating screen (8) are both connected to the light medium combining barrel (9).
5. The iron ore screening system for heavy concrete preparation according to any one of claims 1 to 4, characterized in that: The red ore processing line comprises a red ore primary de-mediating screen (2), a red ore washing mechanism (5), a red ore secondary de-mediating screen (7), a red ore drying mechanism (10) and a red ore collecting mechanism (11) which are connected in sequence.
6. The iron ore screening system for heavy concrete preparation according to claim 5, characterized in that: The feed end of the red ore primary de-medium screen (2) is connected to the overflow port of the heavy medium cyclone (1), the ore discharge end of the red ore primary de-medium screen (2) is connected to the feed end of the red ore washing mechanism (5), and the medium discharge end of the red ore primary de-medium screen (2) is connected to the heavy medium combining barrel (4).
7. The iron ore screening system for heavy concrete preparation according to claim 6, characterized in that: The ore conveying end of the red ore washing mechanism (5) is connected to the feeding end of the red ore secondary de-mediating screen (7), the ore discharging end of the red ore secondary de-mediating screen (7) is connected to the red ore drying mechanism (10), and the discharging end of the red ore drying mechanism (10) is connected to the feeding end of the red ore collecting mechanism (11).
8. The iron ore screening system for heavy concrete preparation according to claim 7, characterized in that: The drainage end of the red ore leaching mechanism (5) and the medium discharge end of the red ore secondary de-medium screen (7) are both connected to the light medium combining barrel (9).