A side-blown furnace

Abstract

The present invention provides a side-blown furnace, comprising a furnace body, the furnace body comprising a furnace hearth, a furnace body, and a furnace top, a furnace cavity being provided in the furnace body, the furnace cavity being sealed by the furnace top, a heat-resistant and wear-resistant composite material being provided on the working surface of the furnace cavity, the furnace body comprising a furnace wall and a water jacket structure; the water jacket structure comprising a water jacket body, the furnace cavity comprising a cylinder cavity and a barrel cavity, the barrel cavity comprising a primary air cavity provided on a side of the water jacket body near the furnace hearth, the cross-sectional width of the cylinder cavity being greater than the cross-sectional width of the primary air cavity; the furnace hearth comprising a base and a plurality of first refractory brick groups, the plurality of first refractory brick groups and the base forming a cylinder cavity, a vertical water jacket being provided within the first refractory brick group. The above-mentioned side-blown furnace, by designing the cylinder cavity to have a cross-sectional width greater than the cross-sectional width of the primary air cavity, prevents the primary air from easily stirring and scouring the furnace hearth and furnace wall, thereby protecting the furnace wall and solving the technical problem of the short service life of the furnace body in the prior art side-blown furnace.

Description

Technical Field

[0001] The present invention relates to the field of smelting technology, in particular to a side-blown furnace. Background Art

[0002] With the development of production technology, people are paying more attention to the service life of production equipment while improving the production technology of products.

[0003] A side-blown furnace is a fixed rectangular furnace. Its main structure consists of a hearth, furnace body, furnace roof, tuyere, secondary air vents, and flue. The hearth includes the furnace wall and a cylinder cavity within the wall. Oxygen-enriched air is blown into the furnace through tuyere on both sides of the side-blown furnace. The oxygen-enriched air strongly stirs the melt, causing turbulent flow throughout the melt in this area, prompting the added material to be quickly and evenly distributed throughout the melt. Mass and heat transfer is achieved between the melt and the charge, and between the melt and the blown gas, producing matte and slag. The matte is discharged through a siphon or overflow under pressure, while the slag is discharged through overflow.

[0004] In the existing technology, the inner width of the furnace of the side-blown furnace is generally smaller than the inner width of the primary air mouth, which makes it easy for the primary air to stir and scour the furnace wall of the furnace, causing serious damage to the furnace wall, affecting the service life of the side-blown furnace, and resulting in a short life of the side-blown furnace body, generally 2-3 years. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a side-blown furnace to solve the technical problem of the short service life of the side-blown furnace body in the prior art.

[0006] A side-blown furnace comprises a furnace body, the furnace body comprising a hearth, a furnace body disposed above the hearth, and a furnace roof disposed over the furnace body; a furnace cavity communicating with the hearth and the furnace body is provided within the furnace body; the furnace roof seals the furnace cavity; a heat-resistant and wear-resistant composite material is provided on a working surface of the furnace cavity; the furnace body comprises a furnace wall and a water jacket structure connecting the furnace wall and the hearth;

[0007] The water jacket structure includes a water jacket body, the furnace cavity includes a cylindrical cavity provided in the water jacket body and a cylinder cavity provided in the furnace, the cylindrical cavity includes a primary air cavity provided at one end of the water jacket body close to the furnace, and the width of the cross section of the cylinder cavity is greater than the width of the cross section of the primary air cavity;

[0008] The furnace cylinder includes a base and a plurality of first refractory brick groups arranged above the base and arranged in a circular shape along the outer periphery of the base. The plurality of first refractory brick groups and the base form the cylinder cavity. A vertical water jacket is provided in the first refractory brick group.

[0009] The above-mentioned side-blown furnace breaks through the conventional design in which the inner width of the furnace shell is smaller than the inner width of the primary air inlet area by designing the cross-section of the cylinder cavity to be larger than the cross-section width of the primary air inlet. It avoids the primary air from easily stirring and scouring the furnace shell and furnace wall, thereby protecting the furnace wall and increasing the service life of the side-blown furnace body. Furthermore, a vertical water jacket is provided on the outside of the furnace shell to protect the first refractory brick group, so as to achieve the purpose of increasing the life of the furnace wall. Moreover, a heat-resistant and wear-resistant composite material is provided on the working surface of the furnace cavity to avoid direct friction with the furnace body, further increasing the service life of the furnace body and solving the technical problem of short service life of the side-blown furnace body in the prior art.

[0010] Furthermore, the water jacket structure also includes a first transverse water jacket extending outward from one end of the water jacket body close to the furnace, the first transverse water jacket connecting the water jacket body and the furnace, the first transverse water jacket being arranged above the cylinder cavity, and the end of the first transverse water jacket away from the water jacket body being arranged on the first refractory brick group.

[0011] Furthermore, the furnace wall includes multiple second refractory brick groups and multiple second transverse water jackets, the multiple second refractory brick groups and the multiple second transverse water jackets are alternately stacked, and the second transverse water jacket at the bottom of the furnace wall is connected to the water jacket body, and the furnace top cover is arranged on the second refractory brick group at the top of the furnace wall.

[0012] Furthermore, the water jacket body includes an inclined section and a vertical section connecting the inclined section and the first transverse water jacket, the inclined section and the vertical section are smoothly connected, the cylinder cavity also includes an inclined cavity, the vertical section surrounds the primary air cavity, and the inclined section surrounds the inclined cavity.

[0013] Furthermore, the inclined section is arranged to be inclined outward from the center of the water jacket body.

[0014] Furthermore, the inclined section and the vertical section are both water jackets.

[0015] Furthermore, the width of the cross section of the cylinder cavity is larger than the width of the cross section of the primary air cavity by 400-2000 mm.

[0016] Furthermore, the height of the cylinder cavity ranges from 1100 to 1600 mm.

[0017] Furthermore, a water cooling structure is provided in the furnace top. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the cross section of the side-blown furnace in an embodiment of the present invention.

[0019] Description of main component symbols:

[0020]

[0021] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] See also Figure 1 , shown is a side-blown furnace in an embodiment of the present invention, comprising a furnace body, the furnace body comprising a hearth, a furnace body disposed above the hearth, and a furnace roof 13 disposed on the furnace body. A furnace cavity communicating with the hearth and the furnace body is provided within the furnace body, the furnace roof 13 seals the furnace cavity, a heat-resistant and wear-resistant composite material 10 is provided on a working surface of the furnace cavity, and the furnace body comprises a furnace wall and a water jacket structure connecting the furnace wall and the hearth;

[0026] The water jacket structure includes a water jacket body, the furnace cavity includes a cylindrical cavity provided in the water jacket body and a cylinder cavity provided in the furnace, the cylindrical cavity includes a primary air cavity 14 provided at one end of the water jacket body near the furnace, and the width 2 of the cross section of the cylinder cavity is greater than the width 3 of the cross section of the primary air cavity;

[0027] The furnace hearth includes a base 1 and a plurality of first refractory brick groups 4 disposed above the base 1 and arranged in an annular manner along the periphery of the base 1. The plurality of first refractory brick groups 4 and the base 1 enclose the cylinder cavity. A vertical water jacket 5 is disposed within the first refractory brick group 4. Specifically, in this application, the water jackets are all copper.

[0028] The furnace hearth is used to hold slag. In this application, the set value of the slag iron-silicon ratio (Fe / SiO2) is 1.1~1.8. It should be further explained that the set value of the slag iron-silicon ratio (Fe / SiO2) can be but not limited to 1.1~1.8. The set value must ultimately be determined based on the actual slag type to protect the slag hanging on the copper water jacket.

[0029] The water jacket structure also includes a first transverse water jacket 7 extending outward from one end of the water jacket body close to the furnace. The first transverse water jacket 7 connects the water jacket body and the furnace. The first transverse water jacket 7 is arranged above the cylinder cavity, and the end away from the water jacket body is arranged on the first refractory brick group 4.

[0030] As a specific example, by increasing the size of the water jacket at the top of the furnace, the transverse cross-sectional size of the water jacket body is reduced. Furthermore, the width 3 of the cross section of the primary air inlet is made smaller than the width 2 of the cross section of the cylinder cavity. This structurally avoids the stirring and scouring of the furnace wall by the primary air, thereby increasing the service life of the furnace body.

[0031] Furthermore, the side-blown furnace is provided with a plurality of primary air inlets (not shown), which are arranged on both sides of the furnace body and connected to the primary air cavity, and provide primary air for the side-blown furnace.

[0032] The furnace wall includes multiple second refractory brick groups 12 and multiple second transverse water jackets 11. The multiple second refractory brick groups 12 and the multiple second transverse water jackets 11 are alternately stacked, and the second transverse water jacket 11 at the bottom of the furnace wall is connected to the water jacket body. The furnace roof 13 is located on the second refractory brick group 12 at the top of the furnace wall. A layer of heat-resistant and wear-resistant composite material is built-up or fusion-welded on the flue gas side of the furnace wall. Specifically, the heat-resistant and wear-resistant material can be an alloy of nickel, chromium, manganese, etc.

[0033] The water jacket body includes an inclined section 9 and a vertical section 6 connecting the inclined section 9 and the first transverse water jacket 7. The inclined section 9 and the vertical section 6 are smoothly connected. The cylindrical cavity also includes an inclined cavity. The vertical section 6 encloses the primary air cavity 14, and the inclined section 9 encloses the inclined cavity. The inclined section 9 is arranged to tilt outward from the center of the water jacket body, and both the inclined section 9 and the vertical section 6 are water jackets.

[0034] The width 2 of the cross section of the cylinder cavity is 400-2000 mm greater than the width 3 of the cross section of the primary air cavity. Optimally, the width 2 of the cross section of the cylinder cavity is 1200 mm greater than the width 3 of the cross section of the primary air cavity.

[0035] As a specific example, the height 8 of the cylinder cavity of the furnace hearth is in the range of 1100-1600 mm. Optimally, the height 8 of the cylinder cavity is 1300 mm.

[0036] As a specific example, a water-cooling structure is provided in the furnace roof 13. The water-cooling structure includes multiple water-cooling pipes, providing a water-cooling channel. The water-cooling structure not only meets the functional requirements of the side-blown furnace, but also protects the furnace roof 13 and helps to increase the service life of the side-blown furnace.

[0037] In summary, the side-blown furnace in the above-mentioned embodiment of the present invention breaks through the conventional design in which the inner width of the furnace shell is smaller than the inner width of the primary air inlet area by designing the cross-section of the cylinder cavity to be larger than the cross-section width of the primary air inlet, thereby avoiding the primary air from easily stirring and scouring the furnace shell and furnace wall, thereby protecting the furnace wall and increasing the service life of the side-blown furnace body. Furthermore, a vertical water jacket is provided on the outside of the furnace shell to protect the first refractory brick group, so as to achieve the purpose of increasing the life of the furnace wall. Moreover, a heat-resistant and wear-resistant composite material is provided on the working surface of the furnace cavity to avoid direct friction with the furnace body, thereby further increasing the service life of the furnace body and solving the technical problem of short service life of the side-blown furnace body in the prior art.

[0038] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A side-blown furnace, characterized in that: The furnace body comprises a furnace cylinder, a furnace body provided above the furnace cylinder, and a furnace roof provided on the furnace body; a furnace cavity communicating with the furnace cylinder and the furnace body is provided in the furnace body; the furnace roof seals the furnace cavity; a heat-resistant and wear-resistant composite material is provided on a working surface of the furnace cavity; the furnace body comprises a furnace wall and a water jacket structure connecting the furnace wall and the furnace cylinder; The water jacket structure includes a water jacket body, the furnace cavity includes a cylindrical cavity provided in the water jacket body and a cylinder cavity provided in the furnace, the cylindrical cavity includes a primary air cavity provided on a side of the water jacket body close to the furnace, and the width of the cross section of the cylinder cavity is greater than the width of the cross section of the primary air cavity; The furnace cylinder includes a base and a plurality of first refractory brick groups arranged above the base and annularly arranged along the outer periphery of the base. The plurality of first refractory brick groups and the base form the cylinder cavity. A vertical water jacket is provided in the first refractory brick group. The water jacket structure further includes a first transverse water jacket extending outward from one end of the water jacket body close to the furnace, the first transverse water jacket connecting the water jacket body and the furnace, and being arranged above the cylinder cavity, with one end of the first transverse water jacket away from the water jacket body being arranged on the first refractory brick group; The furnace wall includes a plurality of second refractory brick groups and a plurality of second transverse water jackets, wherein the plurality of second refractory brick groups and the plurality of second transverse water jackets are alternately stacked, and the second transverse water jacket at the bottom of the furnace wall is connected to the water jacket body, and the furnace top cover is arranged on the second refractory brick group at the top of the furnace wall; The width of the cross section of the cylinder cavity is larger than the width of the cross section of the primary air cavity by 400-2000 mm.

2. The side-blown furnace according to claim 1, characterized in that: The water jacket body includes an inclined section and a vertical section connecting the inclined section and the first transverse water jacket. The inclined section and the vertical section are smoothly connected. The cylinder cavity also includes an inclined cavity. The vertical section encloses the primary air cavity, and the inclined section encloses the inclined cavity.

3. The side-blown furnace according to claim 2, characterized in that: The inclined section is arranged to be inclined outward from the center of the water jacket body.

4. The side-blown furnace according to claim 2, characterized in that: The inclined section and the vertical section are both water jackets.

5. The side-blown furnace according to claim 1, characterized in that: The height range of the cylinder cavity is 1100-1600 mm.

6. The side-blown furnace according to claim 1, characterized in that: A water cooling structure is provided in the furnace top.

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