阅读说明：本技术 一种锑矿石竖式同心双圆筒旋流闪速熔池冶炼炉及其使用方法 (Antimony ore vertical concentric double-cylinder rotational flow flash melting pool smelting furnace and using method thereof ) 是由 王卫国 于 2019-12-06 设计创作，主要内容包括：本发明涉及有色金属锑冶炼技术领域,且公开了锑矿石竖式同心双圆筒旋流闪速熔池冶炼炉,包括外筒炉体及竖直设置在外筒炉体内部中心与其同心的内筒炉体,所述内筒炉体的上下两端均为开口结构,内筒炉体上端从外筒炉体内部延伸出外筒炉体的外部且烟道连接,内筒炉体下端悬在外筒炉体的底部熔池上方,外筒炉体靠近顶部的侧壁两侧分别设置有矿料喷嘴和燃料喷嘴,本发明还公开了锑矿石竖式同心双圆筒旋流闪速熔池冶炼炉的使用方法。本发明能够提高产能降低能耗,富氧供风可提高尾气SO<Sub>2</Sub>浓度实现制酸,解决锑行业废气环保治理难题。(The invention relates to the technical field of non-ferrous metal antimony smelting, and discloses a vertical concentric double-cylinder rotational flow flash molten pool smelting furnace for antimony ore, which comprises an outer cylinder furnace body and an inner cylinder furnace body vertically arranged in the center of the inner part of the outer cylinder furnace body and concentric with the outer cylinder furnace body, wherein the upper end and the lower end of the inner cylinder furnace body are of an open structure, the upper end of the inner cylinder furnace body extends out of the outer cylinder furnace body from the inner part of the outer cylinder furnace body and is connected with a flue, the lower end of the inner cylinder furnace body is suspended above a bottom molten pool of the outer cylinder furnace body, and two sides of the side wall of the outer cylinder furnace body, close to the top, are respectively provided with. The invention can improve the productivity and reduce the energy consumption, and the oxygen-enriched air supply can improve the tail gas SO 2 The concentration realizes the acid preparation, solves the problem of the waste gas of the antimony industry and is environment-friendlyAnd (5) solving the problem.)

1. The utility model provides an antimony ore vertical concentric two drum whirl flash molten bath smelting furnace which characterized in that: the outer barrel furnace body is vertically arranged in the center of the inner portion of the outer barrel furnace body and concentric with the outer barrel furnace body, the upper end and the lower end of the inner barrel furnace body are of an open structure, the upper end of the inner barrel furnace body extends out of the outer barrel furnace body from the inner portion of the outer barrel furnace body and is connected with a flue, the lower end of the inner barrel furnace body is suspended above a bottom molten pool of the outer barrel furnace body, and mineral material nozzles and fuel nozzles are respectively arranged on two sides of the side wall, close to.

2. The vertical concentric dual-cylinder cyclone flash smelting furnace for antimony ore according to claim 1, wherein the front ends of the mineral material nozzles and the fuel nozzles respectively extend into the outer cylinder furnace body and are parallel to the tangential direction of the outer circumference of the inner cylinder.

3. The vertical concentric double-cylinder cyclone flash smelting furnace for antimony ore according to claim 1, wherein a high temperature smelting bath is provided at the bottom of the outer cylinder furnace body; the upper part of the high-temperature molten pool is provided with a slag hole, and the bottom of the high-temperature molten pool is provided with an antimony matte siphon inlet.

4. The vertical concentric dual-cylinder cyclone flash smelting furnace for antimony ore according to claim 1, wherein the outer cylinder furnace body and the inner cylinder furnace body are made of refractory materials respectively.

5. The antimony ore vertical concentric dual barrel cyclone flash bath smelting furnace according to claim 1, wherein the number of the ore nozzles is set to one or more and the number of the fuel nozzles is set to one or more.

6. A method for using an antimony ore vertical concentric double-cylinder rotational flow flash melting pool smelting furnace is characterized in that antimony ore and a flux are respectively ground and dried, then are uniformly mixed according to a set proportion, high-pressure air or oxygen-enriched air is used for injecting a uniformly mixed mineral mixture into a double-cylinder interlayer hearth reaction chamber in a tangential direction at a high speed through a mineral nozzle, and simultaneously, heat supply fuel is injected into the double-cylinder interlayer hearth reaction chamber in a tangential direction through a fuel nozzle for combustion and heat supply; the flame rotates around the circumference of the inner cylinder in the cavity of the double-cylinder flash furnace interlayer high-temperature hearth to move downwards, the material rotates around the circumference of the inner cylinder in the cavity of the double-cylinder flash furnace interlayer high-temperature hearth to move downwards, and simultaneously, flash smelting oxidation reaction is rapidly carried out in the cavity of the high-temperature hearth; antimony oxide dust generated by flash smelting oxidation reaction rotates around the inner cylinder furnace body in a double-cylinder interlayer hearth reaction chamber along with smoke and moves downwards to the bottom of the suspended inner cylinder furnace body, then enters the double-cylinder flash furnace inner cylinder furnace body, vertically moves upwards, enters a flue and then enters a subsequent condensation dust collection system; antimony ore and gangue impurities of flux materials react with the flux in a cavity of a high-temperature hearth of an interlayer of the double-cylinder flash furnace to generate slag, the slag sinks into a molten pool at the bottom of a furnace body of the outer cylinder, the slag is discharged out of the furnace through a slag hole at the upper part of the molten pool, and part of antimony matte generated by the reaction is discharged out of the furnace through a siphon hole at the lower part of the molten pool.

7. The use of the antimony ore vertical concentric double cylinder cyclone flash bath smelting furnace according to claim 6, wherein the antimony ore, flux and solid fuel after drying have a particle diameter of less than 10mm and a moisture content of less than 15%.

8. The use method of antimony ore vertical concentric double cylinder cyclone flash molten pool smelting furnace according to claim 7, wherein the injection power of antimony ore, flux and solid fuel is delivered by air or oxygen-enriched air or pure oxygen, the injection mode is continuous injection or interval injection, the injection flow rate is 0.1 m/s-100 m/s, and the injection flow rate is 1 g/s-10000 g/s.

9. The use method of the antimony ore vertical concentric double-cylinder cyclone flash molten pool smelting furnace according to claim 6, wherein the heat supply fuel is gas fuel or liquid fuel, and the gas fuel or liquid fuel is injected into the reaction chamber of the double-cylinder interlayer hearth at high speed in a tangential direction through a fuel nozzle to supply heat.

10. The use method of the antimony ore vertical concentric double-cylinder cyclone flash smelting furnace according to claim 9, wherein the heat supply fuel is solid fuel, and the solid fuel is pulverized and dried and then injected into the reaction chamber of the double-cylinder interlayer hearth at high speed in a tangential direction through a fuel nozzle for supplying heat.

Technical Field

The invention relates to the technical field of non-ferrous metal antimony smelting, in particular to a vertical concentric double-cylinder rotational flow flash molten pool smelting furnace for antimony ore and a using method thereof.

Background

The traditional antimony ore rough smelting process is more widely applied with three processes of vertical shaft furnace volatilization roasting, open hearth furnace volatilization roasting and blast furnace volatilization smelting, wherein the vertical shaft furnace volatilization roasting and the open hearth furnace volatilization roasting are listed as obsolete backward productivity by the nation because of low productivity and large labor intensity. The traditional antimony ore rough smelting process is mainly an antimony blast furnace volatilization smelting process, and the specific scheme is that after being pelletized, fine ore and lump ore are mixed with coke, iron ore, limestone and the like according to a proper proportion, and the mixture is classified and batched from a furnace top binPutting the antimony oxide powder into a furnace, carrying out volatilization smelting oxidation reaction in a hearth above a tuyere area of a furnace belly water jacket to generate antimony oxide, feeding antimony oxide dust flue gas into a subsequent condensation dust collection system through a flue, cooling, settling and collecting the antimony oxide dust in the condensation dust collection system, and conveying the antimony oxide dust to the next antimony reduction and refining process through pipeline air pressure; the gangue in the ore reacts with two fluxes of iron ore and limestone in the hearth to generate slag, the slag enters the hearth and is discharged out of the furnace through a slag port of the hearth or flows into a front bed through a slag channel and then is discharged out of the furnace. The antimony ore rough smelting blast furnace volatilization smelting process has the characteristics of strong raw material applicability, large processing capacity, high mechanization degree and the like, and becomes the unique antimony ore rough smelting process widely popularized and applied at present. But the blast furnace volatilization smelting process has high energy consumption and tail gas SO₂The concentration is low, the acid can not be prepared, the economic benefit is not ideal, the development almost has no technology upgrading progress in half a century, the industry development is seriously restricted, compared with other new technologies which are different day by day in non-ferrous metal smelting, the technology is gradually out of the bounds, and the technology has gap with the requirements of environment protection, energy conservation and emission reduction provided by the state.

The smelting process of the molten pool is a brand new non-ferrous metal smelting technology developed in the last two decades and is widely applied to smelting production processes of non-ferrous metals such as copper, lead, nickel, tin and the like. The smelting process of molten pool is that the charge is added directly into the melt pool blown by blast to make the added material be wrapped and stirred by gas turbulence in the molten pool by blowing air or oxygen-enriched air or pure oxygen gas into the melt in the furnace, so as to quickly complete the heat transfer between gas, liquid and solid phases and make a violent physical and chemical reaction. The concentrate is simultaneously subjected to the metallurgical processes of heating, melting, oxidation, reduction, matte formation, slag formation and the like in the molten pool. Because the smelting method uses compressed air to intensively stir the molten pool, the oxidation or reduction reaction in the melt is rapidly carried out, and the production efficiency is high. According to different blowing modes, the smelting process of the molten pool can be divided into three main types of top blowing, side blowing and bottom blowing.

The molten pool smelting process is developed in the last two decades, and has the advantages of low energy consumption, high yield, tail gas capable of producing acid, high automation degree and the like, so that the molten pool smelting process is developed rapidly, and a plurality of new molten pool smelting methods are derived, wherein the new molten pool smelting methods comprise a nonindard method, a mitsubishi method, a teniendt method, a silver copper smelting method, an oxygen bottom blowing lead smelting method, a chenkov smelting method, a top-blown rotary converter method, an Isa smelting method, a converter direct copper smelting method and the like. Representative oxygen-enriched bath smelting process manufacturers in China include Hunan Water gap mountain, Henan Yuguang gold lead, Henan Jiyuan Jinli, Henan Wanyang, Yunnan copper industry, Yunnan tin industry and the like.

Flash melting bath smelting is one of the most advanced production processes for smelting heavy non-ferrous metals such as copper, nickel and the like at present. The basic process principle is as follows: grinding ore to below a specified particle size, drying to below a specified moisture content, spraying into a reaction chamber in a flash furnace through a nozzle to enable the ore particles to be suspended in high-temperature oxidizing gas flow, rapidly generating an oxidation reaction of sulfide minerals, and releasing a large amount of heat energy. The fuel consumption of the copper-nickel flash smelting process is only about 50 percent of that of the traditional smelting process. The flash smelting process has the advantages of low energy consumption, large bed capacity, high automation degree, clean production environment and the like.

The non-flash melting bath smelting industrial test of antimony ore has been carried out in the industry for several times, and is terminated by the fact that the antimony content of slag is too high.

During the course of research and practice on this method, the inventors of the present invention found that: the antimony ore rough smelting production process aims at producing antimony oxide through oxidation reaction of sulfide minerals, the antimony ore is extremely volatile and oxidizable in nature, and is very suitable for flash melting bath smelting, sufficient suspension time of ore particles in high-temperature oxidizing gas flow is ensured, the ore particles are fully and completely reacted, and the antimony content of slag can be reduced to an ideal level.

Disclosure of Invention

The invention aims to provide a vertical concentric double-cylinder flash furnace for smelting an antimony ore cyclone flash molten pool and a using method thereof, so as to achieve the effects of improving the production efficiency, reducing the energy consumption and realizing clean production.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides an antimony ore whirl flash melting bath is smelted with concentric two drum flash stoves of vertical formula, includes urceolus furnace body and vertical setting at urceolus furnace body inside center rather than endocentric inner tube furnace body, and the upper and lower both ends of inner tube furnace body are open structure, and the inside outside and the flue that extend the urceolus furnace body of inner tube furnace body upper end follow urceolus furnace body are connected, and inner tube furnace body lower extreme hangs in the bottom molten bath top of urceolus furnace body, and the lateral wall both sides that the urceolus furnace body is close to the top are.

Furthermore, the front end of the mineral material nozzle and the front end of the fuel nozzle respectively extend into the outer cylinder furnace body and are parallel to the tangential direction of the outer circumference of the inner cylinder.

Further, a high-temperature molten pool is arranged at the bottom of the outer cylinder furnace body; the upper part of the high-temperature molten pool is provided with a slag hole, and the bottom of the high-temperature molten pool is provided with an antimony matte siphon inlet.

Preferably, the outer cylinder furnace body and the inner cylinder furnace body are respectively made of refractory materials.

Preferably, the number of the mineral material nozzles is set to one or more, and the number of the fuel nozzles is set to one or more.

The invention also discloses a use method of the vertical concentric double-cylinder flash furnace for smelting the antimony ore cyclone flash molten pool, which comprises the following steps:

respectively grinding antimony ore and a flux into powder and drying the powder, then uniformly mixing the powder according to a set proportion, injecting the uniformly mixed mineral mixture into a double-cylinder interlayer hearth reaction chamber at a high speed in a tangential direction through a mineral material nozzle by using high-pressure air or oxygen-enriched air, and simultaneously injecting heat supply fuel into the double-cylinder interlayer hearth reaction chamber at a high speed in a tangential direction through a fuel nozzle for combustion and heat supply; the flame rotates around the circumference of the inner cylinder in the cavity of the double-cylinder flash furnace interlayer high-temperature hearth to move downwards, the material rotates around the circumference of the inner cylinder in the cavity of the double-cylinder flash furnace interlayer high-temperature hearth to move downwards, and simultaneously, flash smelting oxidation reaction is rapidly carried out in the cavity of the high-temperature hearth; antimony oxide dust generated by flash smelting oxidation reaction rotates around the inner cylinder furnace body in a double-cylinder interlayer hearth reaction chamber along with smoke and moves downwards to the bottom of the suspended inner cylinder furnace body, then enters the double-cylinder flash furnace inner cylinder furnace body, vertically moves upwards, enters a flue and then enters a subsequent condensation dust collection system; antimony ore and gangue impurities of flux materials react with the flux in a cavity of a high-temperature hearth of an interlayer of the double-cylinder flash furnace to generate slag, the slag sinks into a molten pool at the bottom of a furnace body of the outer cylinder, the slag is discharged out of the furnace through a slag hole at the upper part of the molten pool, and part of antimony matte generated by the reaction is discharged out of the furnace through a siphon hole at the lower part of the molten pool.

Preferably, the particle diameter of the dried antimony ore, flux and solid fuel is less than 10mm, and the water content is less than 15%.

Preferably, the injection power of the antimony ore, the flux and the solid fuel is conveyed by air or oxygen-enriched air or pure oxygen gas, the antimony ore, the flux and the solid fuel are injected continuously or at intervals, the injection flow rate is 0.1-100 m/s, and the injection flow rate is 1-10000 g/s.

Preferably, the heat supply fuel is gas fuel or liquid fuel, and the gas fuel or the liquid fuel is injected into the reaction chamber of the double-cylinder interlayer hearth at high speed in a tangential direction through a fuel nozzle to supply heat.

Preferably, the heat supply fuel is solid fuel, and the solid fuel is pulverized, dried and injected into the reaction chamber of the double-cylinder interlayer hearth at high speed in the tangential direction through a fuel nozzle for supplying heat.

The antimony ore powder in the invention is injected into the double-cylinder flash furnace body in parallel with the tangential direction of the inner cylinder at a high speed, and flash smelting oxidation reaction is rapidly carried out in the cavity of the high-temperature hearth with the inner interlayer.

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, and 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 these drawings without creative efforts.

FIG. 1 is a schematic view of a vertical concentric double cylinder flash furnace configuration;

fig. 2 is a transverse cross-sectional view of fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.