Novel briquetting system for processing steelmaking dust

Abstract

The utility model relates to a new ball pressing system for treating steelmaking dust removal ash relates to steelmaking solid waste treatment technical field, and its purpose is to provide a kind of new ball pressing system for improving the uniformity of ball pressing raw material, avoiding production fluctuation, reducing the crushing rate in subsequent process.The utility model for treating steelmaking dust removal ash's new ball pressing system includes roller shaft screen, mixed buffer hopper, still includes single stage or multistage ball presser, the last stage discharge end of preposition process and the discharge end of ball presser are all connected the feed end of roller shaft screen, the discharge end under roller shaft screen screen is connected the feed end of mixed buffer hopper, the discharge end of mixed buffer hopper is connected the feed end of ration feeding belt, the discharge end of ration feeding belt is connected the feed end of ball presser feeding belt, the discharge end of ball presser feeding belt is connected the feed end of ball presser.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking solid waste treatment technology, and in particular to a novel briquetting system for treating iron-containing solid waste such as steelmaking dust. Background Technology

[0002] Steelmaking dust has extremely fine particle size, large specific surface area, poor wettability, low moisture content, and high CaO content, making it difficult to pelletize during subsequent processing.

[0003] In conventional briquetting processes, to improve pelletizing rate and initial strength, companies typically use high-pressure briquetting machines (linear pressure ratios of 1-1.5 t / mm or higher) for briquetting production. Due to the high pressure, the raw material moisture content must be controlled at a low level (around 4%), making water control during the raw material humidification and digestion (CaO removal) process difficult, and hindering complete CaO digestion. Residual CaO will absorb water and expand during pelletizing or storage, causing the pellets to break apart. Due to moisture limitations, the selection of binders in conventional high-pressure briquetting processes is also strictly restricted.

[0004] In conventional briquetting processes, both raw materials and recycled materials are directly fed into the briquetting machine's hopper. The lack of a mixing process between the new and recycled materials results in significant fluctuations in the characteristics of the raw materials, which can affect the stable and smooth operation of production.

[0005] In conventional briquetting processes, although the briquetting rate is relatively high, only simple screening is usually performed afterward, and the finished briquettes are not shaped. This results in flash at the briquette parting point, which breaks during storage and transportation, leading to a high powder content. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a new type of briquetting system that can improve the uniformity of briquetting raw materials, avoid production fluctuations, and reduce the breakage rate in subsequent processes.

[0007] This utility model relates to a novel briquetting system for treating steelmaking dust, comprising a roller screen, a mixing buffer hopper, and one or more briquetting machines. The discharge end of the final stage of the preceding process and the discharge end of the briquetting machine are both connected to the feed end of the roller screen. The discharge end under the roller screen is connected to the feed end of the mixing buffer hopper, and the discharge end of the mixing buffer hopper is connected to the feed end of the briquetting machine.

[0008] This utility model relates to a novel briquetting system for treating steelmaking dust, wherein the feed end of the roller screen is equipped with a roller screen feeding belt, and the discharge end of the pre-process and the briquetting machine conveys the material onto the roller screen feeding belt.

[0009] This utility model relates to a novel briquetting system for treating steelmaking dust, wherein the briquetting machine is equipped with a briquetting machine discharge belt at its discharge end, and the discharge end of the briquetting machine discharge belt is connected to the roller screen feeding belt.

[0010] This utility model relates to a novel briquetting system for treating steelmaking dust, wherein the discharge end of the mixing buffer hopper is equipped with a quantitative feeding belt, the discharge end of the quantitative feeding belt is equipped with a briquetting machine feeding belt, and the discharge end of the briquetting machine feeding belt is connected to the feed end of the briquetting machine.

[0011] This utility model relates to a novel briquetting system for treating dust from steelmaking processes, wherein the briquetting machine is a medium-pressure briquetting machine.

[0012] This utility model relates to a novel briquetting system for treating dust from steelmaking processes, wherein the multiple briquetting machines are connected in series, in parallel, or in a mixed manner.

[0013] This novel briquetting system for treating steelmaking dust differs from existing technologies in that the raw material for briquetting in this system is not directly fed into the briquetting machine. Instead, it is mixed with the machine's output and simultaneously enters the subsequent screening process. Before the material enters the briquetting machine, this system incorporates a roller screen and a mixing buffer hopper. The roller screen screens the material, removing burrs and achieving a shaping effect, thus reducing breakage in subsequent processes. The volume of the mixing buffer hopper can be determined based on production output, ensuring sufficient buffer time. Since most of the stored material has undergone compression by the briquetting machine, breaking up clumps and increasing density, residual CaO continues to dissolve in the hopper, improving briquetting quality. The mixing buffer hopper also improves the uniformity of the raw material for briquetting, preventing production fluctuations.

[0014] The novel briquetting system for treating steelmaking dust will be further described below with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a process flow diagram of the novel briquetting system for treating steelmaking dust.

[0016] The markings in the diagram are as follows: 1-Bulking machine discharge belt; 2-Bulking machine; 3-Roller screen feeding belt; 4-Roller screen; 5-Mixing buffer hopper; 6-Quantitative feeding belt; 7-Bulking machine feeding belt; 8-Distribution valve; 9-Distribution belt. Detailed Implementation

[0017] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] Example 1

[0019] like Figure 1 As shown, the novel briquetting system for treating steelmaking dust includes a roller screen feeding belt 3, a roller screen 4, a mixing buffer hopper 5, a quantitative feeding belt 6, a briquetting machine feeding belt 7, a briquetting machine 2, and a briquetting machine discharge belt 1.

[0020] The feed end of the roller screen feeding belt 3 is connected to the final discharge end of the preceding process. The raw material for briquetting is fed into the roller screen feeding belt 3 from the preceding process. The raw material for briquetting mainly includes iron-containing solid waste such as steelmaking dust and binders.

[0021] A roller screen 4 is installed at the discharge end of the roller screen feeding belt 3. The briquetting raw material conveyed by the roller screen feeding belt 3 enters the roller screen 4 for screening. The roller diameter, rotation speed, spacing, and screen surface length of the roller screen 4 can be reasonably selected according to the briquetting diameter, required initial strength, and production capacity. After screening by the roller screen 4, briquetting that meets the requirements can be screened out for subsequent processes. During the screening process, as the briquetting moves forward along the screen surface, the flash of the briquetting is also removed to achieve the purpose of shaping and reduce the breakage rate in subsequent processes.

[0022] The discharge end of the roller screen 4 is equipped with a mixing buffer hopper 5. The material (pellets) oversize by the roller screen 4 is fed into subsequent processes after being shaped by the roller screen, while the material undersize by the roller screen 4 enters the mixing buffer hopper 5 through the discharge end of the roller screen 4. The entry of the briquetting raw material and unformed powder into the mixing buffer hopper 5 improves the uniformity of the briquetting raw material and avoids production fluctuations. The discharge end of the mixing buffer hopper 5 is equipped with a quantitative feeding belt 6. The discharge end of the quantitative feeding belt 6 is equipped with a briquetting machine feeding belt 7, which quantitatively feeds the mixed briquetting raw material and unformed powder to the briquetting machine feeding belt 7.

[0023] A briquetting machine 2 is installed at the discharge end of the feeding belt 7 of the briquetting machine. The briquetting machine 2 is used to briquetize briquetting raw materials and unformed powder. In this embodiment, the briquetting machine 2 is a medium-pressure briquetting machine (linear pressure ratio 0.5-1.0t / mm). Although some briquetting rate is sacrificed, the moisture content of the briquetting raw materials can be relaxed to 6-7%, reducing the difficulty of dust removal and also making it possible to select low-cost liquid binders. After the raw materials are screened, hard impurities can be avoided from entering the briquetting machine 2, reducing the equipment failure rate.

[0024] The briquetting machine 2 is equipped with a briquetting machine discharge belt 1 at its discharge end. The discharge end of the briquetting machine discharge belt 1 is connected to the roller screen feeding belt 3, so that the material (bulbs + unformed powder) falls into the roller screen feeding belt 3, mixes with the material fed in the previous process, and is then fed into the roller screen 4 for screening.

[0025] In this embodiment, one briquetting machine 2 is provided; in other embodiments, multiple briquetting machines can be provided as needed, and the multiple briquetting machines can be connected in series, parallel, or in a mixed manner. When the briquetting machines are connected in series, the discharge end of the upper-level briquetting machine is connected to the feed end of the lower-level briquetting machine; when the briquetting machines are connected in parallel, the parallel briquetting machines have the same function in the process route, and the material source of the feed ends of all briquetting machines is the discharge of the same process.

[0026] This utility model relates to a novel briquetting system for treating steelmaking dust. During operation, the raw material for briquetting is fed into the roller screen feeding belt 3 from the pre-process, and the material on the briquetting machine discharge belt 1 also falls into the roller screen feeding belt 3. The two material streams are mixed and then fed into the roller screen 4 for screening. The undersize material enters the mixing buffer hopper 5. A quantitative feeding belt 6 is set below the mixing buffer hopper 5 to quantitatively feed the mixed briquetting raw material and unformed powder to the briquetting machine feeding belt 7. The briquetting machine feeding belt 7 transports the material to the briquetting machine 2 for briquetting. The material (bulks) that are screened are shaped by the roller screen and then sent to the subsequent processes.

[0027] This invention relates to a novel briquetting system for treating steelmaking dust. The raw material for briquetting does not directly enter the briquetting machine; instead, it is mixed with the machine's output. Both streams fall onto the same conveyor belt and simultaneously enter the subsequent screening process. Before the material enters the briquetting machine, the system incorporates a roller screen and a mixing buffer hopper. The roller screen screens the material, removing burrs and achieving proper shaping, thus reducing breakage in subsequent processes. The mixing buffer hopper's volume can be determined based on production output, ensuring sufficient buffer time. Since most of the stored material has undergone compression by the briquetting machine, breaking up clumps and increasing density, residual CaO continues to dissolve in the hopper, improving briquetting quality. The mixing buffer hopper also improves the uniformity of the raw material, preventing production fluctuations.

[0028] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A novel briquetting system for treating steelmaking dust, characterized in that: It includes a roller screen, a mixing buffer hopper, and one or more briquetting machines. The discharge end of the final stage of the pre-process and the discharge end of the briquetting machine are both connected to the feed end of the roller screen. The discharge end of the roller screen is connected to the feed end of the mixing buffer hopper, and the discharge end of the mixing buffer hopper is connected to the feed end of the briquetting machine.

2. The novel briquetting system for treating steelmaking dust as described in claim 1, characterized in that: The roller screen is equipped with a roller screen feeding belt at the feed end, and the material is transported to the roller screen feeding belt at the discharge end of the pre-process and the briquetting machine.

3. The novel briquetting system for treating steelmaking dust as described in claim 1 or 2, characterized in that: The briquetting machine is equipped with a briquetting machine discharge belt at the discharge end, and the discharge end of the briquetting machine discharge belt is connected to the roller screen feeding belt.

4. The novel briquetting system for treating steelmaking dust as described in claim 1, characterized in that: The discharge end of the mixing buffer hopper is equipped with a quantitative feeding belt, and the discharge end of the quantitative feeding belt is equipped with a briquetting machine feeding belt. The discharge end of the briquetting machine feeding belt is connected to the feed end of the briquetting machine.

5. The novel briquetting system for treating steelmaking dust as described in claim 1, characterized in that: The briquetting machine is a medium-pressure briquetting machine.

6. The novel briquetting system for treating steelmaking dust as described in claim 1, characterized in that: The multiple briquetting machines can be connected in series, in parallel, or in a mixed manner.

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