Low-emission glass and reduced iron integrated solid waste iron ore smelting equipment and smelting method

Abstract

The invention relates to low-emission glass and reduced iron integrated solid waste iron ore smelting equipment which comprises a stock bin, the stock bin is connected to a reduction reaction device used for reducing iron oxide through a first conveying pipe, and the first conveying pipe further communicates with a smoke dust treatment device; the reduction reaction device is communicated with a feeding hole of the glass kiln through a second conveying device; a slag outlet and a molten iron outlet are formed in the lower part of the glass kiln, the slag outlet is higher than the molten iron outlet, the slag outlet is connected with a slag outflow pipe, the slag outflow pipe is connected to the slag cooling pond, and the molten iron outlet is connected with a molten iron outflow pipe; the combustor is matched outside the glass kiln, the combustor generates heat to enable the glass kiln to smelt substances entering the glass kiln into a liquid state, and the reduction reactor and the glass kiln are combined, so that impurities in the solid waste iron ore can be smelted into raw materials for manufacturing glass while the solid waste iron ore is subjected to reduction ironmaking, and the raw materials are used for manufacturing the glass. And the overall output of solid waste iron ore smelting is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of solid waste iron ore smelting, and in particular to low-emission solid waste iron ore smelting equipment and a smelting method that integrates glass and reduced iron. Background Art

[0002] Currently, iron ore is mostly produced in blast furnaces, a process whereby iron ore is reduced to pig iron using a reducing agent at high temperatures. The main raw materials for ironmaking are iron ore, coke, limestone, and air. Iron ores include hematite (Fe2O3) and magnetite (Fe3O4). The iron content of the ore is called its grade. Before smelting, the ore undergoes beneficiation to remove impurities and improve its grade. It is then crushed, ground, and sintered before being fed into the blast furnace. Coke provides heat and produces the reducing agent carbon monoxide. Limestone is used to form slag and remove gangue, separating the smelted iron from impurities. The primary equipment for ironmaking is the blast furnace. During smelting, iron ore, coke, and limestone are added from the top of the furnace through a feed port. Simultaneously, hot air is blown into the furnace from the bottom through an air inlet. Under the high temperature, the reactants fully contact and react to produce iron. Blast furnace ironmaking refers to the process of smelting iron ore, coke, carbon monoxide, hydrogen and other fuels and flux (theoretically, iron can also be smelted at high temperatures by mixing metals with higher activity than iron with ores) into a blast furnace to remove impurities and obtain metallic iron (pig iron).

[0003] For some solid waste iron ores with low iron content (less than 30%), the cost and output of blast furnace ironmaking are not proportional, and a large amount of ironmaking residues need to be processed during the blast furnace ironmaking process, and a large amount of gas that pollutes the environment will also be produced during the ironmaking process. Summary of the Invention

[0004] The purpose of the present invention is to provide low-emission solid waste iron ore smelting equipment and smelting method that integrates glass and reduced iron. Combined with a reduction reactor and a glass kiln, the solid waste iron ore can be reduced and iron-smelted while the impurities in the solid waste iron ore can be melted into raw materials for making glass, which is used to make glass, greatly improving the overall output of solid waste iron ore smelting.

[0005] In order to achieve the above objectives, the technical solution adopted by the present invention is: low-emission solid waste iron ore smelting equipment integrating glass and reduced iron, including a silo, which is connected to a reduction reaction device for reducing iron oxides through a first conveying pipe, and the first conveying pipe is also connected to a smoke treatment device; the reduction reaction device is connected to the feed port of the glass kiln through a second conveying device; a slag outlet and a molten iron outlet are provided at the lower part of the glass kiln, and the slag outlet is higher than the molten iron outlet, the slag outlet is connected to a slag outflow pipe, the slag outflow pipe is connected to a slag cooling pool, and the molten iron outlet is connected to the molten iron outflow pipe; a burner is provided outside the glass kiln, and the burner generates heat so that the glass kiln melts the material entering it into a liquid state.

[0006] Preferably, there is one discharge port, and it is located at the bottom of the glass kiln.

[0007] Preferably, the discharge port includes a slag outlet and a molten iron outlet, and the slag outlet is higher than the molten iron outlet, the slag outlet is connected to the slag outflow pipe, the slag outflow pipe is connected to the slag cooling pool, and the molten iron outlet is connected to the molten iron outflow pipe.

[0008] Preferably, the reduction reaction device is a rotary kiln, and the reaction temperature in the rotary kiln is 900-1100°C.

[0009] Preferably, the reduction reaction device is a fluidized bed, and the reaction temperature of the fluidized bed is 900-1100°C.

[0010] Preferably, the first conveying pipe is a three-way pipe, and the angles between the three ways are 110-130 degrees, and the part connected to the smoke treatment device is horizontal.

[0011] Another technical solution of the present invention is a low-emission solid waste iron ore smelting method integrating glass and reduced iron, characterized by comprising the following steps: Step 1: Make the cold consolidated iron ore into pellets or powder, mix it with a reducing agent and put it into a silo; Step 2: Open the valve of the silo and feed the ore mixed with the reducing agent into the reduction reaction device. The temperature in the reduction reaction device is 900-1100°C. The reducing agent reduces the iron oxide to iron. The gas generated during the reduction process enters the smoke treatment device and is treated; Step 3: After the reduction reaction in step 2, the material is fed into the glass kiln. The heat generated by the burner in the glass kiln completely melts the material into liquid. The liquid after melting will be stratified. The molten iron has a high density and is in the lower layer, while the other slag water is in the upper layer. The molten iron and slag water are then discharged from the discharge port. The slag water passes through the slag cooling pool and is used as a raw material for glassmaking. After the molten iron is cooled, the smelting of the iron is completed.

[0012] Preferably, the reducing agent is coal powder or coke powder.

[0013] Preferably, the temperature in the glass furnace is greater than 1600°C.

[0014] Preferably, the fuel used by the burner is coal gas, natural gas or hydrogen; the combustion-supporting agent is pure oxygen or hydrogen.

[0015] The technical effect of the present invention is: by combining a reduction reactor and a glass kiln, solid waste iron ore can be reduced and iron-smelted while impurities (mainly silicon dioxide) in the solid waste iron ore can be melted into raw materials for making glass for making glass. In this way, solid waste iron ore can be used for iron-smelting. Compared with a blast furnace, there is no residue emission, and the impurities can be melted into raw materials for glass making, which can produce additional output, thereby greatly improving the economic value of fibula iron ore refining. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a low-emission solid waste iron ore smelting equipment that integrates glass and reduced iron.

[0017] Figure 2 Schematic diagram of the glass kiln in Example 1.

[0018] Figure 3 Schematic diagram of the glass kiln in Example 2.

[0019] The text labels shown in the figure indicate: 1. silo; 2. first conveying pipe; 3. reduction reaction device; 4. smoke treatment device; 5. second conveying pipe; 6. glass kiln; 7. burner; 8. slag outflow pipe; 9. slag cooling pool; 10. molten iron outflow pipe; 11. feed port; 12. slag outlet; 13. molten iron outlet. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention. Example 1

[0021] like Figure 1-2 As shown, the low-emission solid waste iron ore smelting equipment integrating glass and reduced iron of the present invention includes a silo 1, which is connected to a reduction reaction device 3 for reducing iron oxides through a first conveying pipe 2, and the first conveying pipe 2 is also connected to a smoke treatment device 4; the reduction reaction device 3 is connected to a feed port 11 of a glass kiln 6 through a second conveying device 5; a slag outlet 12 and a molten iron outlet 13 are provided at the lower part of the glass kiln 6, and the slag outlet 12 is higher than the molten iron outlet 13, the slag outlet 12 is connected to a slag outflow pipe 8, the slag outflow pipe 8 is connected to a slag cooling pool 9, and the molten iron outlet 13 is connected to a molten iron outflow pipe 10; a burner 7 is provided outside the glass kiln 6, and the burner 7 generates heat so that the glass kiln 6 melts the material entering it into a liquid state, the reduction reaction device 3 is a rotary kiln or a fluidized bed, and the reaction temperature is 900-1100°C, the first conveying pipe 2 is a tee pipe, and the angles between the tees are 110-130 degrees, and the part connected to the smoke treatment device 4 is horizontal.

[0022] The smelting method using the above smelting equipment comprises the following steps: Step 1: cold consolidated iron ore is made into pellets or powder, mixed with coal powder or coke powder, and then placed into silo 1; Step 2: Open the valve of the silo 1 and feed the ore mixed with the reducing agent into the reduction reaction device 3 through the first conveying pipe 2. The temperature in the reduction reaction device 3 is 900-1100°C. The reducing agent reduces the iron oxide to iron. The gas generated during the reduction process enters the smoke treatment device 4 and is treated; Step 3. After the reduction reaction in step 2, the material is fed into the glass kiln 6 through the second conveying pipe 5. The heat generated by the burner 7 in the glass kiln 6 will enter the glass kiln so that the temperature inside it is greater than 1600°C, and then the material inside it will be completely melted into liquid. The liquid after melting will be stratified. The molten iron has a high density and is in the lower layer, while the other slag water will be in the upper layer. The slag water in the upper layer flows out from the slag outlet, passes through the slag cooling pool, and is used as a raw material for glassmaking for glassmaking. The molten iron in the lower layer flows out from the molten iron outlet, and the iron smelting is completed after supercooling.

[0023] The fuel used by the burner is coal gas, natural gas or hydrogen; the combustion-supporting agent is pure oxygen or hydrogen.

[0024] When the smelting equipment of the present application is used, the slag outflow pipe and the molten iron outflow pipe are both trough pipes, and the slag outlet and the molten iron outlet are both blocked by taphole mud. After the smelting is completed, the taphole mud at the slag outlet is first removed to discharge the slag, and then the taphole mud at the molten iron outlet is removed to discharge the molten iron. Example 2

[0025] Compared with Example 1, Figure 3 As shown, the slag outlet and the molten iron outlet of this embodiment are one outlet. After smelting is completed, the molten iron in the lower layer will be discharged first. When the molten iron outlet is completed, the slag water in the upper layer will also be discharged. In this way, the molten iron for ironmaking and the slag water for making glass can be collected separately.

[0026] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0027] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. Low-emission solid waste iron ore smelting equipment integrating glass and reduced iron, including a silo, characterized in that: The silo is connected to a reduction reaction device for reducing iron oxides through a first conveying pipe, and the first conveying pipe is also connected to a smoke treatment device; the reduction reaction device is connected to the feed port of the glass kiln through a second conveying device; the lower part of the glass kiln is provided with outlets for discharging slag and iron, and a burner is provided outside the glass kiln. The burner generates heat so that the glass kiln can melt the material entering it into a liquid state.

2. The low-emission solid waste iron ore smelting equipment integrating glass and reduced iron according to claim 1 is characterized in that: There is one discharge port, which is located at the bottom of the glass kiln.

3. The low-emission solid waste iron ore smelting equipment integrating glass and reduced iron according to claim 1 is characterized in that: The discharge port includes a slag outlet and a molten iron outlet, and the slag outlet is higher than the molten iron outlet. The slag outlet is connected to the slag outflow pipe, the slag outflow pipe is connected to the slag cooling pool, and the molten iron outlet is connected to the molten iron outflow pipe.

4. The low-emission solid waste iron ore smelting equipment integrating glass and reduced iron according to claim 1 is characterized in that: The reduction reaction device is a rotary kiln, and the reaction temperature in the rotary kiln is 900-1100°C.

5. The low-emission solid waste iron ore smelting equipment integrating glass and reduced iron according to claim 1 is characterized in that: The reduction reaction device is a fluidized bed, and the reaction temperature of the fluidized bed is 900-1100°C.

6. The low-emission solid waste iron ore smelting equipment integrating glass and reduced iron according to claim 1 is characterized in that: The first conveying pipe is a three-way pipe, and the angles between the three ways are 110-130 degrees. The part connected with the smoke treatment device is horizontal.

7. A smelting method using the low-emission, glass-and-reduced-iron-integrated solid waste iron ore smelting equipment according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Make the cold consolidated iron ore into pellets or powder, mix it with a reducing agent and put it into a silo; Step 2: Open the valve of the silo and feed the ore mixed with the reducing agent into the reduction reaction device. The temperature in the reduction reaction device is 900-1100°C. The reducing agent reduces the iron oxide to iron. The gas generated during the reduction process enters the smoke treatment device and is treated; Step 3: After the reduction reaction in step 2, the material is fed into the glass kiln. The heat generated by the burner in the glass kiln completely melts the material into liquid. The liquid after melting will be stratified. The molten iron has a high density and is in the lower layer, while the other slag water is in the upper layer. The molten iron and slag water are then discharged from the discharge port. The slag water passes through the slag cooling pool and is used as a raw material for glassmaking. After the molten iron is cooled, the smelting of the iron is completed.

8. The low-emission solid waste iron ore smelting method integrating glass and reduced iron according to claim 7, characterized in that: The reducing agent is coal powder or coke powder.

9. The low-emission solid waste iron ore smelting method integrating glass and reduced iron according to claim 7, characterized in that: The temperature inside the glass kiln is greater than 1600℃.

10. The low-emission solid waste iron ore smelting method integrating glass and reduced iron according to claim 7, characterized in that: The fuel used by the burner is coal gas, natural gas or hydrogen; the combustion-supporting agent is pure oxygen or hydrogen.

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