Multilayer spray gun side-blowing reinforced smelting equipment

Abstract

The utility model discloses multi-layer spray gun side-blowing strengthened smelting equipment, and relates to the technical field of metallurgical engineering. Comprising a first-layer water jacket, a second-layer water jacket, a third-layer water jacket, a fourth-layer water jacket, a furnace top water jacket and a smoke opening water jacket which are sequentially arranged from bottom to top; a first spray gun set, a second spray gun set, a third spray gun set and a fourth spray gun set are sequentially arranged on the furnace body from bottom to top. The multi-layer spray gun group is adopted, so that the dependence of only two layers of tuyeres in the prior art is eliminated, the operation process is more flexible, the smelting capability is improved, the application range is wider, and the reduction of active metal oxide into active simple substance metal is realized. And meanwhile, the heat transfer effect is improved, the chemical energy utilization rate of carbon is increased, the production cost is reduced, and the resource adaptability of coal and as-fired materials is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical engineering, and particularly relates to a multi-layer lance side-blowing enhanced smelting device. Background Art

[0002] The oxygen-enriched side-blowing bath smelting process technology has the characteristics of small investment, strong material handling capacity, simple operation, etc. The oxygen-enriched side-blowing furnace of its process equipment has been well applied in the metallurgical field. At present, only one layer of tuyeres and two layers of tuyeres distributed up and down are adopted on both sides of the applied oxygen-enriched side-blowing furnace. The one-layer tuyere is used to blow oxygen-enriched air into the equipment, and the two-layer tuyere lance is used to blow air into the equipment. However, with this lance distribution, the oxidation or reduction atmosphere required for smelting in the equipment can only be adjusted through the one-layer tuyere lance, making the smelting operation not flexible enough. In many cases, the purpose of deep reduction cannot be achieved, resulting in the inability to smelt and reduce active metals. In addition, when the equipment is in a reducing atmosphere for smelting, the chemical energy utilization rate of carbon is not sufficient at this time. Part of the carbon element escapes with the flue gas in the form of CO and burns again after leaving the melt, and the melt does not obtain this part of heat and fails to further utilize its chemical energy, increasing energy consumption and costs. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a multi-layer lance side-blowing enhanced smelting device to solve the above problems.

[0004] To achieve the above object, the utility model provides a multi-layer lance side-blowing enhanced smelting device, which includes a hearth and a furnace body arranged in sequence from bottom to top. The furnace body includes a first water jacket, a second water jacket, a third water jacket, a fourth water jacket, a furnace top water jacket and a smoke outlet water jacket arranged in sequence from bottom to top; a first lance group, a second lance group, a third lance group and a fourth lance group are arranged on the furnace body in sequence from bottom to top.

[0005] Further, the first water jacket and the second water jacket are both copper water jackets, the fourth water jacket, the furnace top water jacket and the smoke outlet water jacket are all steel water jackets, and the third water jacket is a copper water jacket or a steel water jacket.

[0006] Further, a charging port is arranged on the furnace top water jacket.

[0007] Further, the first lance group, the second lance group, the third lance group and the fourth lance group are all distributed on both sides of the equipment.

[0008] Further, the nozzles of the first lance group, the second lance group, the third lance group and the fourth lance group all incline downward, and the inclination angle is between 0 and 60 degrees.

[0009] The utility model has the following beneficial effects:

[0010] The utility model adopts a four-layer spray gun group, getting rid of the dependence on the conventional two-layer tuyere, making the operation process more flexible, improving the smelting capacity, having a wider application range, and making it a reality to reduce active metal oxides to active elemental metals. At the same time, it improves the heat transfer effect, enhances the utilization rate of the chemical energy of carbon, reduces the production cost, and improves the adaptability of coal and furnace-charged materials, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. is a schematic diagram of a multi-layer spray gun side-blowing intensifying smelting device proposed by the utility model;

[0012] Figure 2 FIG. is another schematic diagram of a multi-layer spray gun side-blowing intensifying smelting device proposed by the utility model.

[0013] In the figure: 1 - hearth; 2 - first-layer water jacket; 3 - second-layer water jacket; 4 - third-layer water jacket; 5 - fourth-layer water jacket; 6 - furnace top water jacket; 7 - smoke outlet water jacket; 8 - feeding port; 9 - fourth spray gun group; 10 - third spray gun group; 11 - second spray gun group; 12 - first spray gun group. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] To achieve the above-mentioned purpose and effect, the technical means and structure adopted by the utility model are described in detail in combination with the drawings for the preferred embodiments of the utility model to illustrate their features and functions.

[0015] As Figure 1-2 shown, the utility model provides a multi-layer spray gun side-blowing intensifying smelting device, including a hearth 1 and a furnace body arranged in sequence from bottom to top, and the furnace body includes a first-layer water jacket 2, a second-layer water jacket 3, a third-layer water jacket 4, a fourth-layer water jacket 5, a furnace top water jacket 6 and a smoke outlet water jacket 7 arranged in sequence from bottom to top; a first spray gun group 12 and a second spray gun group 11 are arranged at appropriate positions on the first-layer water jacket 2, the first spray gun group 12 is located below the second spray gun group 11, and a third spray gun group 10 and a fourth spray gun group 9 are arranged at appropriate positions on the second-layer water jacket 3, the third-layer water jacket 4 or the fourth-layer water jacket 5, and the third spray gun group 10 is located below the fourth spray gun group 9.

[0016] Both the first-layer water jacket 2 and the second-layer water jacket 3 are copper water jackets, both the fourth-layer water jacket 5, the furnace top water jacket 6 and the smoke outlet water jacket 7 are steel water jackets, and the third-layer water jacket 4 is a copper water jacket or a steel water jacket.

[0017] A feeding port 8 is arranged on the furnace top water jacket 6.

[0018] The first spray gun group 12, the second spray gun group 11, the third spray gun group 10 and the fourth spray gun group 9 are all distributed on both sides of the device.

[0019] The proper position means that different or the same injection heights are provided according to different materials during smelting. The nozzles of the first lance group 12, the second lance group 11, the third lance group 10, and the fourth lance group 9 all incline downward, and the inclination angle is between 0 and 60 degrees.

[0020] In the oxidation stage, the metal-containing material, the flux, and the granular coal are respectively metered. After being mixed, they are continuously added from the feeding port 8 on the water jacket 6 at the top of the equipment. All the materials fall from top to bottom and finally fall into the molten bath. In this stage, the second lance group 11, the fourth lance group 9, and the third lance group 10 are turned on. The second lance group 11 feeds oxygen-enriched air to contact the melt in the molten bath, generating strong agitation. The third lance group 10 feeds oxygen-enriched air to contact the melt splashed up by the agitation. The fourth lance group 9 contacts the rising flue gas. The temperature and oxidation atmosphere inside the whole equipment are controlled by the amount of coal and oxygen in the equipment. The granular coal is preheated first and then burned during the falling process and completely burns in the molten bath. Part of the granular coal burns into CO during the falling process and rises with the flue gas. During the rising process, due to the oxygen-enriched air injected by the third lance group 10, the heat is transmitted back to the molten bath after combustion, saving energy consumption. The fourth lance group 9 only burns a very small amount of CO at the end to ensure the safety of the subsequent system.

[0021] In the reduction stage, when enough materials are added into the equipment, the feeding needs to be stopped and the reduction stage is entered. Only coal or other reducing agents are added in the reduction stage. The temperature and reduction atmosphere inside the whole equipment are controlled by the amount of coal or other reducing agents and oxygen in the equipment. In this stage, the second lance group 11, the fourth lance group 9, the first lance group 12, and the third lance group 10 are turned on. The first lance group 12 injects the reducing agent, and at the same time, the reducing agent is added from the feeding port 8 of the water jacket 6 at the top of the furnace, greatly enhancing the reduction atmosphere inside the equipment. The energy-saving effect of the third lance group 10 is more obvious.

[0022] The oxygen-enriched air is a gas with an oxygen volume concentration greater than 21%. The reducing agent is pulverized coal, natural gas, coal gas, hydrogen, etc.

[0023] During the above side-blowing smelting process, due to the action of the multi-layer lance group, the agitation process of the materials inside the equipment is enhanced, the melting speed of the materials and the oxidation-reduction reaction speed are accelerated, and the uniformity of the molten bath reaction is good. It is particularly suitable for the recovery of metallic iron in refractory iron-containing materials.

[0024] The above is only a preferred embodiment of the present invention, not all embodiments. Anyone should know that any structural changes made under the inspiration of the present invention, as long as they have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims

1. A multi-layer lance side-blowing strengthening smelting equipment, characterized in that: It comprises a furnace cylinder and a furnace body arranged in sequence from bottom to top, wherein the furnace body comprises a first water jacket, a second water jacket, a third water jacket, a fourth water jacket, a furnace top water jacket and a smoke outlet water jacket arranged in sequence from bottom to top; the furnace body is provided with a first spray gun group, a second spray gun group, a third spray gun group and a fourth spray gun group arranged in sequence from bottom to top.

2. A multi-layer lance side-blowing enhanced smelting equipment as claimed in claim 1, characterized in that: The first layer water jacket and the second layer water jacket are both copper water jackets, the fourth layer water jacket, the furnace top water jacket and the smoke outlet water jacket are all steel water jackets, and the third layer water jacket is a copper water jacket or a steel water jacket.

3. The multi-layer lance side-blowing strengthening smelting equipment according to claim 1, characterized in that: The furnace top water jacket is provided with a feeding port.

4. The multi-layer lance side-blowing strengthening smelting equipment according to claim 1, characterized in that: The first spray gun group, the second spray gun group, the third spray gun group and the fourth spray gun group are all distributed on both sides of the equipment.

5. The multi-layer lance side-blowing strengthening smelting equipment according to claim 1, characterized in that: The nozzles of the first spray gun group, the second spray gun group, the third spray gun group and the fourth spray gun group are all tilted downward, and the tilt angle is between 0 and 60 degrees.

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