A directional strengthening flash metallurgy method

Abstract

The present invention relates to a flash metallurgy method for directional strengthening of steel and nonferrous metals. The flash metallurgy method mainly consists of a directional strengthening reaction tower and a smelting pool, and comprises the following steps: 1) one or more fuel spray guns and reducing agent or oxidizing agent spray guns are arranged along the side walls of the reaction tower at different descending heights according to the temperature required for the chemical reaction and the strengthening requirements of the atmosphere, and a directional high-temperature, high-reducing degree or high-oxidizing degree atmosphere is formed in the reaction tower by adjusting the process parameters of each spray gun; 2) powdered dry ore sand is introduced at high speed through one or more ore sand spray guns at the top of the directional strengthening reaction tower, so that it is dispersed in the directional strengthening atmosphere in the reaction tower in a state of extremely large specific surface area. The directional strengthening flash metallurgy method can process complex ores, laterite nickel ores, gas ash and various industrial wastes of steel and nonferrous metals, and has the advantages of high efficiency, low investment and low energy consumption.

Description

Technical Field

[0001] The invention relates to the fields of steel industry, nonferrous metal industry, mechanical casting and the technical field requiring reduction of carbon emission, and in particular to a directional strengthening flash metallurgy method. Background Art

[0002] Flash smelting is an advanced smelting technology developed in modern times. It has the advantages of low energy consumption, large scale, good working conditions, high automation level and labor productivity. Its metal recovery rate is even higher than that of traditional hydrometallurgical zinc smelting process. It can also process lead-zinc mixed concentrates that are difficult to sort, and produce lead and zinc at the same time, overcoming the indirect heating disadvantage that traditional pyrometallurgical zinc smelting cannot overcome. This method uses oxygen-rich air or hot air to spray dry concentrate into the reaction space of the flash furnace, so that the concentrate ions are suspended in the high-temperature oxidizing airflow, and the oxidation reaction of sulfide minerals occurs rapidly, releasing a large amount of heat in the smelting process.

[0003] At present, flash metallurgy uses high temperature to melt gold during metallurgy. However, this method cannot form data changes according to the internal temperature during smelting. In this way, it is impossible to strengthen the oxidation atmosphere, thereby failing to improve the degree and quality of metal smelting and reduce energy waste. Summary of the invention

[0004] In order to further expand the application of flash metallurgy technology to the smelting of other metals such as the steel industry, the present invention provides a directionally strengthened flash metallurgy method, which has the advantages of high efficiency, low investment, low energy consumption, etc.

[0005] The present invention provides a directional strengthening flash metallurgy method, comprising the following steps:

[0006] 1) One or more fuel spray guns and reducing agent or oxidizing agent spray guns are arranged along the side walls of the reaction tower at different descending heights according to the temperature required for the chemical reaction and the requirements for strengthening the atmosphere, and a directional high-temperature, high-reducing degree or high-oxidizing degree atmosphere is formed in the reaction tower by adjusting the process parameters of each spray gun;

[0007] 2) Powdered dry ore sand is introduced at high speed through one or more ore sand spray guns at the top of the directional strengthening reaction tower, so that it is dispersed in the directional strengthening atmosphere in the reaction tower in a state of large specific surface area, and the main smelting reaction is completed within a few seconds, and the product falls into the molten pool;

[0008] 3) One or more fuel spray guns and reducing agent or oxidizing agent spray guns are arranged on the side wall of the molten pool according to the temperature and atmosphere strengthening requirements of the chemical reaction to complete the final chemical reaction process.

[0009] Furthermore, the fuel may be any fuel such as natural gas, hydrogen, coke oven gas, etc.

[0010] Furthermore, the reducing agent may be hydrogen or carbon monoxide, and the oxidizing agent may be air or oxygen.

[0011] Furthermore, the ore spray gun, fuel spray gun, reducing agent or oxidizing agent spray gun may be a conventional spray gun or a plasma spray gun.

[0012] Furthermore, in the directional strengthening flash metallurgy method, in addition to the fuel spray gun heating method, other heating methods such as preheating of the oxidant or reductant, electrode heating, etc. can also be used for process heating.

[0013] Furthermore, the directional enhanced flash metallurgy method can process complex ores of steel and nonferrous metals, laterite nickel ore, gas ash and various industrial wastes.

[0014] Compared with the existing flash metallurgy technology, the present invention provides a directional enhanced flash metallurgy method. The directional enhanced flash metallurgy method effectively improves the oxidation atmosphere inside the reactor by changing the temperature inside the reactor. The efficiency of metal smelting is improved by improving the oxidation atmosphere. During smelting, the metal is sprayed at a high speed through the spray gun, and the smelting is completed quickly, which has the beneficial effects of high efficiency, low investment, low energy consumption, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the process of the directional strengthening flash metallurgy method in the present invention.

[0016] In the figure: a reaction tower (100), a smelting pool (200), an ore spray gun (10), a fuel spray gun (20), and a reducing agent or oxidizing agent spray gun (30). DETAILED DESCRIPTION

[0017] The following will be combined with 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 , a directional strengthening flash metallurgy method, comprising the following steps:

[0019] 1) One or more fuel spray guns 20 and reducing agent or oxidizing agent spray guns 30 are arranged along the side walls of the reaction tower 100 at different descending heights according to the temperature required for the chemical reaction and the requirements for strengthening the atmosphere. By adjusting the process parameters of each spray gun, a directional high-temperature, high-reducing degree or high-oxidizing degree atmosphere is formed in the reaction tower;

[0020] 2) Powdered dry ore is introduced at high speed through one or more ore spray guns 10 at the top of the directionally strengthened reaction tower, so that it is dispersed in the directionally strengthened atmosphere in the reaction tower in a state of large specific surface area, and the main smelting reaction is completed within a few seconds, and the product falls into the molten pool 200;

[0021] 3) One or more fuel spray guns 20 and reducing agent or oxidizing agent spray guns 30 are arranged on the side wall of the molten pool 200 according to the temperature and atmosphere strengthening requirements of the chemical reaction to complete the final chemical reaction process.

[0022] Among them, the fuel can be any fuel such as natural gas, hydrogen, coke oven gas, etc.;

[0023] The reducing agent may be hydrogen or carbon monoxide, and the oxidizing agent may be air or oxygen.

[0024] Among them, the ore spray gun 10, the fuel spray gun 20, and the reducing agent or oxidizing agent spray gun 30 can be conventional spray guns or plasma spray guns, etc.;

[0025] Among them, in the directional strengthening flash metallurgy method, in addition to the heating method of the fuel spray gun 20, the heating methods such as preheating the oxidant or reducing agent, electrode heating, etc. can also be used for the process heating;

[0026] Among them, the directional enhanced flash metallurgy method can process complex ores of steel and non-ferrous metals, laterite nickel ore, gas ash and various industrial wastes.

[0027] Example 1: The reaction tower of the directional strengthening flash metallurgical furnace has an inner diameter of 6.35m and a height of 10m. It processes iron ore with an iron content of 65% and produces 527,000 tons of molten pig iron annually.

[0028] Example 2: The reaction tower of the directional strengthening flash metallurgical furnace has an inner diameter of 13.5m and a height of 12m. It processes iron ore with an iron content of 65% and produces 2.371 million tons of molten pig iron annually.

[0029] Example 3: The reaction tower of the directional strengthening flash metallurgical furnace has an inner diameter of 13.5m and a height of 10m. It processes iron ore with an iron content of 56% and produces 2.113 million tons of molten pig iron annually.

[0030] Example 4: The reaction tower of the directional enhanced flash metallurgical furnace has an inner diameter of 5m and a height of 8m. It processes laterite nickel ore with an iron content of 21% and produces 103,000 tons of molten nickel iron annually.

[0031] When this embodiment is in use, the reducing agent is hydrogen or a mixed gas with hydrogen as the main component, the ore sand spray gun, fuel spray gun, reducing agent or oxidizing agent spray gun are conventional spray guns, the fuel is natural gas, and the process heat supplement adopts the heating method of fuel spray gun + preheating reducing agent.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0034] The beneficial effects of the present invention are as follows: the directional enhanced flash metallurgy method effectively improves the oxidation atmosphere inside the reactor by changing the temperature data inside the reactor, thereby improving the efficiency of metal smelting. During smelting, the metal is sprayed at a high speed through the spray gun, and the smelting is completed quickly, which has the beneficial effects of high efficiency, low investment, low energy consumption, etc.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A directional strengthening flash metallurgy method, characterized in that: The following steps are involved: 1) One or more fuel spray guns and reducing agent or oxidizing agent spray guns are arranged along the side walls of the reaction tower at different descending heights according to the temperature required for the chemical reaction and the requirements for strengthening the atmosphere. By adjusting the process parameters of each spray gun, a directional high-temperature, high-reducing degree or high-oxidizing degree atmosphere is formed in the reaction tower; 2) Powdered dry ore is introduced at high speed through one or more ore spray guns at the top of the directional strengthening reaction tower, so that it is dispersed in the directional strengthening atmosphere in the reaction tower in a state of large specific surface area, and the main smelting reaction is completed within a few seconds, and the product falls into the molten pool; 3) One or more fuel spray guns and reducing agent or oxidizing agent spray guns are arranged on the side wall of the molten pool according to the temperature required for the chemical reaction and the requirements for strengthening the atmosphere to complete the final chemical reaction process.

2. A directional strengthening flash metallurgy method according to claim 1, characterized in that: The fuel may be any fuel selected from natural gas, hydrogen and coke oven gas.

3. A directional strengthening flash metallurgy method according to claim 1, characterized in that: The reducing agent is hydrogen or carbon monoxide, and the oxidizing agent is air or oxygen.

4. A directional strengthening flash metallurgy method according to claim 1, characterized in that: The ore spray gun, fuel spray gun, reducing agent or oxidizing agent spray gun are conventional spray guns or plasma spray guns.

5. A directional strengthening flash metallurgy method according to claim 1, characterized in that: In the directional strengthening flash metallurgy method, in addition to the fuel spray gun heating method, the process heating method also adopts any one of preheating the oxidant or reducing agent and electrode heating.

6. A directional strengthening flash metallurgy method according to claim 1, characterized in that: The directional enhanced flash metallurgy method is used to process one or more of the complex ores and gas ash of steel and nonferrous metals.

Images