Sintering raw material processing device
By installing a material separator and water pumping equipment in the sintering raw material treatment device, the problem of insufficient contact between coke powder and lime powder is solved, the fuel combustion conditions are improved, the mineralization speed and bonding strength are improved, and the sintering cost is reduced.
Patent Information
- Application Number
- CN202420624170.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-03-28
AI Technical Summary
In industrial sintering production, the contact between coke powder and lime powder is insufficient, which makes lime difficult to receive heat released by fuel combustion, and the internal particles of coke powder are not easy to come into contact with air, which deteriorates the combustion conditions of solid fuel and reduces the combustion efficiency.
Install a feeder on the belt between the dolomite silo and the lime powder silo to separate the dolomite powder so that the exposed coke powder is in full contact with the lime powder; set up a water-pumping equipment between the return ore silo and the belt to make the lime powder come into contact with the wet return ore, promote the digestion reaction of the lime powder, and form a Ca(OH)2 colloid with finer particle size and stronger adhesion.
The combustion conditions of fuel are improved, the mineralization rate of CaO and iron oxides is improved, the liquid phase of the sintered material layer and the bonding strength between the ore is increased, the consumption of sintered solid fuel is reduced, and the sintering processing cost is significantly reduced.
Smart Images
Figure CN222700371U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sintering raw material processing, in particular to a sintering raw material processing device. Background Art
[0002] Sintering is a method of mixing various powdered iron-containing raw materials with appropriate amounts of fuel, flux and water, and then igniting and sintering them on a sintering device after mixing and pelletizing, so that they are sintered into blocks under incomplete melting conditions. This process uses the high temperature generated by the combustion of fuel to cause a series of physical and chemical changes in the material. When cooled, the generated liquid phase binds the mineral powder particles into blocks to form sintered ore. The sintering process includes two important chemical reactions: (1) fuel combustion, i.e. 2C+O 2 =2CO and C+O 2 =CO 2 , (2) Mineralization reaction, namely the diffusion of iron oxides and alkaline fluxes such as CaO and the formation of substances such as calcium ferrite.
[0003] At present, the order of sintering ingredients in industrial sintering production is iron material, coke powder, dolomite, lime, and return ore. This order of ingredients will cause coke powder and lime powder to be blocked by dolomite powder, which has the following two shortcomings: (1) Due to its fine particle size, lime is easy to adhere to the outer edge of the pelletizing ball, react with minerals in the solid phase to form low-melting point compounds, and is not easy to receive the heat released by the combustion of fuel; (2) Due to its coarse particle size, coke powder is easily wrapped by layers of powdered ore and is located at the core of the pelletizing ball. It cannot contact the low-melting point compounds on the surface of the ball, and the internal coke powder particles are not easy to contact with the air, which worsens the combustion conditions of the solid fuel, resulting in a large amount of residual carbon that is not effectively utilized, thereby reducing the combustion efficiency of the solid fuel. Utility Model Content
[0004] In view of the problem of low sintering fuel combustion efficiency in the prior art, the utility model provides a sintering raw material processing device, which solves the problem of insufficient contact between coke powder and lime powder by installing a distributor on a belt between the positive projection of a dolomite silo and the positive projection of a lime powder silo, and provides a water pumping device between the return ore silo and the belt to achieve better adhesion of lime and coke powder, thereby improving the sintering combustion efficiency.
[0005] The utility model provides a sintering raw material processing device, comprising a silo and a belt, wherein the silo is arranged above the belt, and according to the forward direction of the belt, the silo comprises a coke powder silo, a dolomite silo, a lime powder silo and a return ore silo in sequence, a distributor is installed on the belt between the orthographic projection of the dolomite silo and the orthographic projection of the lime powder silo, the distributor is in a "<" shape with its opening facing the forward direction of the belt, the width of the distributor opening is smaller than the width of the belt, the height of the lower edge of the distributor from the belt is 0.95 to 1.05 times the thickness of the coke powder on the belt, and a return ore pumping device is provided between the return ore silo and the belt.
[0006] The distributor installed on the belt can separate the dolomite to both sides of the belt without affecting the operation of the equipment and process adjustment, so that the coke powder is exposed and fully contacted with the lime powder coming down later. The return ore water pumping equipment allows the return ore to be soaked with water before it goes on the belt, so that the lime powder can contact with the wet return ore in advance, promoting the digestion reaction of the lime powder. The digested lime powder becomes Ca(OH) 2 Colloid, while the volume increases by 1-2 times, and adheres better to the coke powder particles.
[0007] Furthermore, a return ore belt scale is installed below the return ore silo, and the water outlet end of the return ore pumping equipment is located above the return ore belt scale.
[0008] Furthermore, the return water pumping equipment is a water adding pipe.
[0009] Furthermore, an anti-blocking atomizing nozzle is installed at the water outlet end of the water filling pipe.
[0010] The water outlet of the return ore pumping equipment sprays atomized water, which can evenly soak the return ore on the return ore belt scale. The wet return ore comes into contact with the lime powder, which can make the lime powder digested more completely.
[0011] Furthermore, when the sintering raw material processing device is in operation, the height of the lower edge of the distributor from the belt is equal to the thickness of the coke powder on the belt.
[0012] It can not only effectively separate dolomite powder and expose coke powder, but also prevent the distributor from scratching the belt.
[0013] Furthermore, belt scales are installed below the coke powder silo, the dolomite silo, and the lime powder silo respectively.
[0014] The beneficial effects of the utility model are:
[0015] The sintering raw material processing device provided by the utility model can effectively solve the problem of insufficient contact between coke powder and low melting point compounds, improve the combustion conditions of fuel, and increase the mineralization speed of CaO and iron oxides. With the sintering raw material processing device, under the condition that the sintering machine speed and material layer thickness remain unchanged, the liquid phase amount of the sintering material layer and the bonding strength between ores are improved, the sintering solid fuel consumption can be reduced by 0.3-0.5kg / t ore, and the sintering processing cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 It is a structural schematic diagram of the sintering raw material processing device of the utility model.
[0018] In the figure, 1-coke powder silo, 2-dolomite silo, 3-lime powder silo, 4-return ore silo, 5-return ore belt scale, 6-return ore water pumping equipment, 7-feeder, 8-belt. DETAILED DESCRIPTION
[0019] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0020] Example 1
[0021] Reference Figure 1 A sintering raw material processing device includes a silo and a belt 8. The silo is above the belt 8. The silo includes a coke powder silo 1, a dolomite silo 2, a lime powder silo 3 and a return ore silo 4 in the forward direction of the belt 8. Belt scales are installed below the coke powder silo 1, the dolomite silo 2 and the lime powder silo 3. A "<"-shaped distributor 7 with an opening facing the forward direction of the belt 8 is installed on the belt 8 between the orthographic projection of the dolomite silo 2 and the orthographic projection of the lime powder silo 3. The width of the distributor 7 opening is smaller than the width of the belt 8, and the height of the lower edge of the distributor 7 from the belt 8 is equal to the thickness of the coke powder on the belt 8. A return ore belt scale 5 is installed below the return ore silo 4. A return ore water pumping device 6 is provided between the return ore silo 4 and the belt 8. The return ore water pumping device 6 is located above the return ore belt scale 5. The return ore water pumping device 6 is a water adding pipe, and an anti-blocking atomizing nozzle is installed at the water outlet of the water adding pipe.
[0022] The working principle of Example 1 is as follows:
[0023] When the sintering raw material processing device is in operation, the coke powder bin 1, dolomite bin 2 and lime powder bin 3 discharge coke powder, dolomite and lime powder to the corresponding belt scales at their lower parts in turn, and then transport them to the belt 8. After the dolomite is on the belt 8, it is separated to both sides of the belt 8 by the distributor 7. After the lime powder is discharged, it can fully contact with the coke powder discharged before, thereby improving the combustion efficiency of the solid fuel. The lower edge of the distributor 7 contacts the upper surface of the coke powder layer, which can effectively separate the dolomite powder without separating the coke powder, so that the coke powder spread on the belt 8 is exposed, and the distributor 7 can also prevent the belt 8 from being scratched by the distributor 7. When the return ore bin 4 discharges the return ore to the return ore belt scale 5, the anti-blocking atomizing nozzle of the return ore water pumping equipment 6 sprays water to the return ore. When the return ore soaked in water is discharged to the belt 8, the lime powder contacts the wet return ore, promoting the digestion reaction of the lime powder. The digested lime powder becomes Ca(OH) with finer particle size and stronger adhesion. 2 The colloid increases in volume by 1-2 times, and adheres better to the coke particles. After the above steps are completed, the materials are sent to the mixer and sintering machine in turn. After the materials are ignited, the sintering process is completed under the action of the exhaust fan.
[0024] By adopting the sintering raw material processing device, under the conditions of unchanged sintering machine speed and material layer thickness, the liquid phase amount of the sintering material layer and the bonding strength between ores are improved, and the sintering solid fuel consumption can be reduced by 0.3-0.5kg / t ore, significantly reducing the sintering processing cost.
[0025] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.
Claims
1. A sintering raw material processing device, comprising a silo and a belt (8), characterized in that: The silos are arranged above the belt (8). In the forward direction of the belt (8), the silos include a coke powder silo (1), a dolomite silo (2), a lime powder silo (3) and a return ore silo (4) in sequence. A distributor (7) is installed on the belt (8) between the positive projection of the dolomite silo (2) and the positive projection of the lime powder silo (3). The distributor (7) is in a "<" shape with its opening facing the forward direction of the belt (8). The width of the distributor (7) opening is smaller than the width of the belt (8). The height of the lower edge of the distributor (7) from the belt (8) is 0.95 to 1.05 times the thickness of the coke powder on the belt (8). A return ore pumping device (6) is provided between the return ore silo (4) and the belt (8).
2. The sintering raw material processing device according to claim 1, characterized in that: A return ore belt scale (5) is installed below the return ore silo (4), and a water outlet of the return ore pumping device (6) is located above the return ore belt scale (5).
3. The sintering raw material processing device according to claim 2, characterized in that: The return ore water pumping equipment (6) is a water supply pipe.
4. The sintering raw material processing device according to claim 3, characterized in that: An anti-blocking atomizing nozzle is installed at the water outlet end of the water filling pipe.
5. The sintering raw material processing device according to claim 1, characterized in that: When the sintering raw material processing device is in operation, the height of the lower edge of the distributor (7) from the belt (8) is equal to the thickness of the coke powder on the belt (8).
6. The sintering raw material processing device according to claim 1, characterized in that: Belt scales are installed below the coke powder silo (1), the dolomite silo (2), and the lime powder silo (3).