阅读说明：本技术 一种粒料喷吹装置及方法 (Aggregate blowing device and method ) 是由 张雪松 张殿伟 贾国利 陈宇 史东磊 张勇 张海滨 赵靖 赵满祥 周继良 徐萌 于 2020-06-08 设计创作，主要内容包括：本发明公开了一种粒料喷吹装置及方法,涉及铁水的冶炼技术领域,解决了如何有效脱除冶炼铁水含有的杂质元素的技术问题。粒料喷吹装置包括料仓、送料器与喷吹通道,料仓的出口与送料器的入口连通；喷吹通道的入口连通有进气通道,送料器的出口连通于喷吹通道的入口与出口之间；送料器将料仓内的粒料输送至喷吹通道,进气通道内输入气体将粒料沿喷吹通道喷吹至铁水内。本发明通过粒料喷吹装置使粒料与铁水中的杂质元素进行氧化或者还原反应,料喷吹装置将粒料以喷吹的方式输送进铁水中,不仅能够提高粒料喷吹的工作效率,同时还使得粒料能够深入到铁水内,使粒料与杂质元素进行充分的氧化或者还原反应,保证了杂质元素脱除的有效性。(The invention discloses a pellet blowing device and a pellet blowing method, relates to the technical field of smelting of molten iron, and solves the technical problem of how to effectively remove impurity elements contained in the smelted molten iron. The aggregate injection device comprises a stock bin, a feeder and an injection channel, wherein an outlet of the stock bin is communicated with an inlet of the feeder; the inlet of the blowing channel is communicated with an air inlet channel, and the outlet of the feeder is communicated between the inlet and the outlet of the blowing channel; the feeder conveys the granules in the storage bin to the blowing channel, and gas is input into the gas inlet channel to blow the granules into molten iron along the blowing channel. According to the invention, the granular material and the impurity elements in the molten iron are subjected to oxidation or reduction reaction through the granular material injection device, and the granular material is conveyed into the molten iron by the material injection device in an injection mode, so that the working efficiency of granular material injection can be improved, the granular material can enter the molten iron deeply, the granular material and the impurity elements are subjected to sufficient oxidation or reduction reaction, and the effectiveness of impurity element removal is ensured.)

1. A pellet blowing device, comprising a magazine (3), a feeder and a blowing channel (10), wherein:

the bin (3) is filled with aggregates, and an outlet of the bin (3) is communicated with an inlet of the feeder;

the inlet of the blowing channel (10) is communicated with an air inlet channel (9), the outlet of the blowing channel (10) faces to molten iron, and the outlet of the feeder is communicated between the inlet and the outlet of the blowing channel (10);

the feeder conveys the granules in the bin (3) to the blowing channel (10), and gas is input into the air inlet channel (9) to blow the granules into molten iron along the blowing channel (10).

2. The granule blowing device according to claim 1, characterized in that the bin (3) is provided with a sealing cover (2), the sealing cover (2) and the bin (3) form an integral closed box body which is provided with a vent (1) and a discharge port (5), respectively, and the vent (1) is filled with gas to convey the granules from the discharge port (5) into the feeder.

3. The aggregate blowing device according to claim 1, wherein the feeder comprises a driving motor (6) and a spiral blade (7) which are connected, the bin (3) is communicated with a feeding pipe (8) through a flange (4), the driving motor (6) is arranged on the feeding pipe (8), the spiral blade (7) is arranged in the feeding pipe (8), the aggregate is conveyed from the bin (3) to the spiral blade (7), and the feeding pipe (8) is communicated with the blowing channel (10).

4. The apparatus for blowing pellets as claimed in claim 3, wherein the outlet of the feeding pipe (8) is connected to an elbow (81), the discharge end of the helical blade (7) extends to the inlet of the elbow (81), the outlet of the elbow (81) is connected between the inlet and the outlet of the blowing channel (10), and the outlet of the elbow (81) is inclined to the blowing channel (10) along the blowing direction of the gas in the blowing channel (10).

5. The pellet blowing device as claimed in claim 4, wherein said blowing passage (10) has an L-shaped configuration, said blowing passage (10) has a circular arc shape at a location of an inflection point, and an outlet of said blowing passage (10) is perpendicular to a flow direction of molten iron.

6. The pellet blowing device according to any one of claims 1 to 5, characterized in that a dust hood (12) is arranged on the wall of the outlet of the blowing channel (10), a dust removing pipe (11) is communicated with the dust hood (12), and a dust removing device is communicated with the dust removing pipe (11).

7. The pellet blowing device as claimed in claim 6, wherein said dust hood (12) has a trumpet-shaped configuration, the opening area of which is not less than 10 times the area of the outlet of the blowing channel (10).

8. A pellet blowing device as claimed in any one of claims 1 to 5, characterized in that the silo (3), the feeder and the blowing channel (10) are all made of stainless steel, and the diameter of the blowing channel (10) is not less than 30 mm.

9. A pellet blowing method characterized by using the pellet blowing device according to any one of claims 1 to 8, comprising the steps of:

s1, arranging a blowing channel (10) of the granular material blowing device above molten iron;

s2, filling the aggregate into a storage hopper (3);

s3, starting a feeder to convey the aggregates from the bin (3) to the blowing channel (10);

and S4, blowing the granules into the molten iron along the blowing channel (10) through the gas in the gas inlet channel (9).

10. The pellet blowing method as claimed in claim 9, wherein compressed air is used as the gas in said gas inlet passage (9), and the pressure of the gas in said gas inlet passage (9) is not less than 1.5 kg.

Technical Field

The invention relates to the technical field of smelting of molten iron, in particular to a pellet blowing device and a pellet blowing method.

Background

In order to produce high-quality competitive steel products, it is required that the lower the impurity content in the iron (molten steel) component, the better. However, in the process of smelting molten iron, the impurity content in the molten iron is often too high due to the limitation of raw material conditions and other factors. For example, high temperature and circulating molten iron in the blast furnace smelting process can corrode the blast furnace hearth. In order to prevent the hearth from burning through and ensure the safe production of the blast furnace, the titanium-added furnace protection mode is usually adopted for smelting after the temperature difference of water in the hearth or the temperature of a thermocouple rises. This inevitably leads to an increase in the titanium content in the molten iron, which is too high, and not only causes splashing in the subsequent steel-making process, but also the titanium in the molten iron has a strong affinity with carbon, oxygen, nitrogen, or other elements, and is easily combined with each other to form fine inclusions such as titanium dioxide, titanium nitride, or titanium carbide. These fine inclusions significantly reduce the cleanliness of the steel, and have a great influence on the production of high-quality steel.

Therefore, how to effectively remove the titanium element in the molten iron, so as to reduce the titanium content in the molten iron to the required range, avoid the splashing of the molten iron in the subsequent steelmaking process, and improve the cleanliness of steel products is a technical problem to be solved urgently by technical staff in the technical field.

Disclosure of Invention

In view of the above, the present invention is to overcome the defects of the prior art, and in a first aspect, provides a pellet blowing apparatus to solve the technical problem of how to effectively remove impurity elements contained in the smelting iron water in the prior art.

The technical scheme adopted by the invention for solving the technical problem is as follows:

the utility model provides a granule jetting device, includes feed bin, feeder and jetting passageway, wherein:

the bin is filled with aggregates, and an outlet of the bin is communicated with an inlet of the feeder;

the inlet of the blowing channel is communicated with an air inlet channel, the outlet of the blowing channel faces the molten iron, and the outlet of the feeder is communicated between the inlet and the outlet of the blowing channel;

the feeder conveys the granules in the storage bin to the blowing channel, and gas is input into the gas inlet channel to blow the granules into molten iron along the blowing channel.

On the basis of the technical scheme, the granule blowing device can be improved as follows.

Optionally, a sealing cover is arranged on the bin, an integral sealing box body formed by the sealing cover and the bin is respectively provided with a vent hole and a discharge hole, and the air input into the vent hole conveys the granules into the feeder from the discharge hole.

Optionally, the feeder includes driving motor and helical blade that are connected, the feed bin has the conveying pipe through flange intercommunication, driving motor sets up on the conveying pipe, helical blade sets up in the conveying pipe, the aggregate is carried to helical blade on from the feed bin, the conveying pipe communicates with jetting passageway.

Optionally, an outlet of the feeding pipe is communicated with a bent pipe, a discharge end of the helical blade extends to an inlet of the bent pipe, an outlet of the bent pipe is communicated between an inlet and an outlet of the injection channel, and an outlet of the bent pipe is inclined to the injection channel along an injection direction of gas in the injection channel.

Optionally, the blowing channel is in an L-shaped structure, the blowing channel is in an arc shape at an inflection point, and an outlet of the blowing channel is perpendicular to the flow direction of the molten iron.

Optionally, a dust hood is arranged on the pipe wall of the outlet of the blowing channel, the dust hood is communicated with a dust removing pipe, and the dust removing pipe is communicated with dust removing equipment.

Optionally, the dust excluding hood is of a horn-shaped structure, and the opening area of the horn-shaped structure is not less than 10 times of the area of the outlet of the blowing channel.

Optionally, the material of the bin, the feeder and the blowing channel is stainless steel, and the diameter of the blowing channel is not less than 30 mm.

In a second aspect, the present invention further provides a pellet blowing method, using the pellet blowing device, including the following steps:

s1, arranging a blowing channel of the granular material blowing device above molten iron;

s2, filling the aggregate into a storage hopper;

s3, starting a feeder to convey the aggregate from the storage bin to the blowing channel;

and S4, blowing the granules into the molten iron along the blowing channel by the gas in the gas inlet channel.

On the basis of the technical scheme, the granule blowing method can be improved as follows.

Optionally, the gas in the intake passage is compressed air, and the pressure of the gas in the intake passage is not less than 1.5 kg.

Compared with the prior art, the granule blowing device provided by the invention has the beneficial effects that:

the invention can blow the granules into the molten iron through the granule blowing device, so that the granules and impurity elements in the molten iron are subjected to oxidation or reduction reaction, thereby achieving the purpose of removing the impurity elements in the molten iron. Because the bulk density of the granules is very high, the granules are conveyed into the molten iron in a blowing mode through the bin, the feeder and the blowing channel, so that the working efficiency of blowing the granules can be improved, the granules can penetrate into the molten iron, the granules and impurity elements are subjected to sufficient oxidation or reduction reaction, and the effectiveness of removing the impurity elements is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the structure of a pellet blowing device of the present invention;

FIG. 2 is a flow chart of the pellet blowing method of the present invention.

In the figure:

1-a vent; 2-sealing cover; 3, a storage bin; 4, a flange; 5, discharging a material outlet; 6, driving a motor; 7-helical blades; 8, a feeding pipe; 81-bending a pipe; 9-an air inlet channel; 10-a blowing channel; 11-a dust removal pipe; 12-dust excluding hood.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention and are not to be taken as a comprehensive embodiment. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.