阅读说明：本技术 一种金属矿物焙烧装置 (Metal mineral roasting device ) 是由 罗立群 刘成 雷芸 雷严明 张晓雪 叶远林 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种金属矿物焙烧装置,属于矿物焙烧技术领域。该金属矿物焙烧装置,包括回转窑、充气部件和燃烧室；所述回转窑包括回转窑筒体,所述燃烧室与所述回转窑筒体的出料端连通；所述充气部件包括导管和通气室,所述导管的一端穿过回转窑筒体侧壁至所述回转窑筒体内的焙烧区,所述导管的另一端与所述通气室连通,所述通气室套设于所述回转窑筒体的外表面并用于将空气或者氧气输送至所述回转窑筒体的内部。该装置能实现氧化还原一体化焙烧过程,提高了焙烧金属矿物的效率。(The invention discloses a metal mineral roasting device, and belongs to the technical field of mineral roasting. The metal mineral roasting device comprises a rotary kiln, an inflation component and a combustion chamber; the rotary kiln comprises a rotary kiln cylinder body, and the combustion chamber is communicated with the discharge end of the rotary kiln cylinder body; the air charging component comprises a guide pipe and an air vent chamber, one end of the guide pipe penetrates through the side wall of the rotary kiln barrel to a roasting area in the rotary kiln barrel, the other end of the guide pipe is communicated with the air vent chamber, and the air vent chamber is sleeved on the outer surface of the rotary kiln barrel and used for conveying air or oxygen to the inside of the rotary kiln barrel. The device can realize the oxidation-reduction integrated roasting process and improve the efficiency of roasting the metal minerals.)

1. A metal mineral roasting device is characterized by comprising a rotary kiln, an inflation component and a combustion chamber; the rotary kiln comprises a rotary kiln cylinder body, and the combustion chamber is communicated with the discharge end of the rotary kiln cylinder body; the air charging component comprises a guide pipe and an air vent chamber, one end of the guide pipe penetrates through the side wall of the rotary kiln barrel to a roasting area in the rotary kiln barrel, the other end of the guide pipe is communicated with the air vent chamber, and the air vent chamber is sleeved on the outer surface of the rotary kiln barrel and used for conveying air or oxygen to the inside of the rotary kiln barrel.

2. The metal mineral roasting apparatus of claim 1, wherein the gas filling means further comprises a guide rail, a slider, an elastic member, and a gas pipe; be equipped with one-way admission valve on the air vent, the guide rail is followed one-way admission valve's direction of admitting air is arranged, the slider with guide rail sliding connection, the one end of elastic component with the slider is connected and is produced and is trended the slider butt the elasticity of the relative one-way admission valve one side of air vent, set up one on the slider and give vent to anger the end and the corresponding air guide hole of one-way admission valve, the one end of breather pipe with the inlet end intercommunication of air guide hole.

3. The metal mineral roasting apparatus of claim 1, wherein the gas charging member further comprises a bracket, one end of the bracket is connected with the outer surface of the rotary kiln cylinder, the other end of the bracket is connected with the aeration chamber, and the bracket is used for fixing the aeration chamber on the outer surface of the rotary kiln cylinder.

4. The metal mineral roasting apparatus of claim 1, wherein the outlet end of the conduit is provided with a plurality of outlet holes for introducing oxygen or air into the interior of the rotary kiln cylinder.

5. The metal mineral roasting apparatus according to claim 1, wherein said duct is a W-shaped duct having a high middle portion and low ends, and said aeration chamber is communicated with a portion of said W-shaped duct having a high middle portion.

6. The metal mineral roasting apparatus of claim 5, wherein the W-shaped duct further comprises an end cap detachably attached to a lower portion of both ends of the W-shaped duct.

7. The metal mineral roasting apparatus of claim 1, further comprising a feed bin, wherein the feed bin comprises a feed pipe and a flue gas chamber, wherein a discharge end of the feed pipe passes through the flue gas chamber to communicate with a feed end of the rotary kiln barrel, and the feed end of the feed pipe extends to the outside of the flue gas chamber.

8. The metal mineral roasting apparatus of claim 7, wherein a tail gas extraction opening is formed in the flue gas chamber, and the tail gas extraction opening is used for extracting gas generated inside the rotary kiln cylinder.

9. The metal mineral roasting apparatus according to claim 1, further comprising a discharge port provided at a bottom of the combustion chamber.

10. The metal mineral roasting apparatus of claim 1, wherein the height of the discharge end of the rotary kiln cylinder relative to the horizontal plane is lower than the height of the feed end of the rotary kiln cylinder relative to the horizontal plane.

Technical Field

The invention relates to the technical field of mineral roasting, in particular to a metal mineral roasting device.

Background

At present, with the rapid development of the steel industry in China, iron ores which are high in grade and easy to select are about to be exhausted, and with the continuous rapid development of economy, the demand of metals such as lead, zinc, copper, nickel and the like is gradually increased, so that the metal mineral resources are gradually exhausted. However, in China, a plurality of refractory iron oxide minerals with high iron content and more impurities exist, and refractory iron ores and industrial solid waste resources with high contents of metal impurities such as sulfur, lead, zinc and the like exist, such as: smelting iron-containing industrial solid wastes such as copper slag, nickel slag and the like. However, these metal minerals cannot be developed and utilized effectively because of the lack of scientific equipment and process. Because oxygen or air can not be accurately sent to the roasting area in the rotary kiln cylinder, the amount of oxygen or air in the roasting area can not be well controlled, the phenomenon of overburning or underburning is easily generated during roasting of the metal minerals, and the efficiency of roasting the metal minerals is not high.

Disclosure of Invention

The invention aims to overcome the technical defects and provide a metal mineral roasting device, which solves the technical problem of low efficiency of roasting metal minerals in the prior art.

In order to achieve the technical purpose, the technical scheme of the invention provides a metal mineral roasting device which comprises a rotary kiln, an inflation part and a combustion chamber; the rotary kiln comprises a rotary kiln barrel, the combustion chamber is communicated with the discharge end of the rotary kiln barrel, and the inflation component is sleeved and fixed on the outer surface of the rotary kiln barrel; the inflation component comprises a conduit and a vent chamber; one end of the guide pipe penetrates through the side wall of the rotary kiln cylinder to a roasting area in the rotary kiln cylinder, the other end of the guide pipe is communicated with the ventilation chamber, and the ventilation chamber is sleeved on the outer surface of the rotary kiln cylinder and used for conveying air or oxygen to the interior of the rotary kiln cylinder.

Furthermore, the inflation component also comprises a guide rail, a sliding block, an elastic piece and a vent pipe; the guide rail is followed the direction of admitting air of one-way admission valve arranges, the slider with guide rail sliding connection, the one end of elastic component with the slider is connected and is produced and is trended the slider butt the elasticity of the relative one-way admission valve one side of air-vent chamber, set up one on the slider and give vent to anger the end and the corresponding air guide hole of one-way admission valve, the one end of breather pipe with the inlet end intercommunication of air guide hole.

Furthermore, the gas charging component also comprises a support, one end of the support is connected with the outer surface of the rotary kiln cylinder, the other end of the support is connected with the vent chamber, and the support is used for fixing the vent chamber on the outer surface of the rotary kiln cylinder.

Furthermore, a plurality of air outlet holes are formed in the air outlet end of the guide pipe, and the air outlet holes are used for introducing oxygen or air into the rotary kiln cylinder.

Further, the duct is a W-shaped duct with a high middle part and two low ends, and the breather chamber is communicated with the high middle part of the W-shaped duct.

Further, the W-shaped guide pipe also comprises an end cap, and the end cap is detachably connected with the lower parts of the two ends of the W-shaped guide pipe.

Further, still include the feeding storehouse, the feeding storehouse includes inlet pipe and flue gas chamber, the discharge end of inlet pipe passes the flue gas chamber with the feed end intercommunication of rotary kiln barrel, the feed end of inlet pipe extends to the outside of flue gas chamber.

Further, a tail gas pumping hole is formed in the flue gas chamber and used for pumping out gas generated inside the rotary kiln barrel.

Further, the combustor also comprises a discharge opening which is arranged at the bottom of the combustion chamber.

Furthermore, the height of the discharge end of the rotary kiln cylinder relative to the horizontal plane is lower than that of the feed end of the rotary kiln cylinder relative to the horizontal plane.

Compared with the prior art, the invention has the beneficial effects that: the combustion chamber is internally filled with gas for combustion to heat the interior of the rotary kiln cylinder communicated with the combustion chamber, the metal minerals enter the rotary kiln cylinder for roasting, the ventilation chamber is used for conveying air or oxygen to the interior of the rotary kiln cylinder through the guide pipe to assist in roasting the metal minerals, one end of the guide pipe penetrates through the side wall of the rotary kiln cylinder to a roasting area in the rotary kiln cylinder, the other end of the guide pipe is communicated with the ventilation chamber, and the ventilation chamber is used for conveying air or oxygen, so that the oxygen or air can be accurately conveyed to the roasting area, and the amount of the air or oxygen entering the roasting area can be controlled only by controlling the amount of the oxygen or air conveyed to the rotary kiln cylinder through the guide pipe, so that the phenomenon of over-burning or under-burning of the roasted metal minerals is avoided, and the efficiency of roasting the metal minerals is improved.

Drawings

FIG. 1 is a schematic view of the construction of a metal mineral roasting apparatus according to example 1 of the present invention.

FIG. 2 is a sectional view of a metal mineral roasting apparatus according to example 1 of the present invention.

FIG. 3 is a schematic view of the inflatable component of part A of FIG. 2 of the present invention.

Fig. 4 is an enlarged view of portion B of fig. 3 of the present invention.

Description of reference numerals: 1. a rotary kiln; 11. a rotary kiln cylinder; 111. a refractory brick; 2. an inflation member; 21. a conduit; 211. an air outlet; 212. an end cap; 22. a breather chamber; 221. a one-way intake valve; 23. a guide rail; 24. a slider; 25. an elastic member; 26. a breather pipe; 27. a support; 3. a combustion chamber; 4. a feeding bin; 41. a feed pipe; 42. a flue gas chamber; 421. a tail gas extraction opening; 5. a discharge outlet; 6. a support member; 7. a temperature detector; 8. gas measuring parts.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

Referring to fig. 1 to 4, the present embodiment provides a metal mineral roasting apparatus, comprising a rotary kiln 1, an air charging member 2 and a combustion chamber 3; the rotary kiln 1 comprises a rotary kiln cylinder 11, the combustion chamber 3 is communicated with the discharge end of the rotary kiln cylinder 11, the inflation component 2 is sleeved and fixed on the outer surface of the rotary kiln cylinder 11, and the inflation component 2 comprises a guide pipe 21 and a ventilation chamber 22; one end of the duct 21 penetrates through the side wall of the rotary kiln barrel 11 to the roasting area of the rotary kiln barrel 11, and the other end of the duct 21 is communicated with the ventilation chamber 22, and the ventilation chamber 22 is used for conveying air or oxygen to the interior of the rotary kiln barrel 11.

On the basis of the above embodiment, the inflation component 2 of the present embodiment further includes a guide rail 23, a slider 24, an elastic member 25, and a vent pipe 26; the ventilation chamber 22 is provided with a one-way air inlet valve 221, the guide rail 23 is arranged along the air inlet direction of the one-way air inlet valve 221, the sliding block 24 is in sliding connection with the guide rail 23, one end of the elastic piece 25 is connected with the sliding block 24 and generates elastic force tending to enable the sliding block 24 to abut against one side of the ventilation chamber 22 opposite to the one-way air inlet valve 221, the sliding block 24 is provided with an air outlet end corresponding to the one-way air inlet valve 221, and one end of the air pipe 26 is communicated with the air inlet end of the air outlet hole. When the rotary kiln barrel 11 rotates, the ventilation chamber 22 is fixed on the outer surface of the rotary kiln barrel 11 and can rotate along with the rotation of the rotary kiln barrel 11, the sliding block 24 is abutted against the side wall of the ventilation chamber 22, the ventilation chamber 22 rotates relative to the sliding block 24, when the ventilation chamber 22 rotates until the one-way air inlet valve 221 is communicated with the air outlet end of the air guide hole, the ventilation chamber 26 can be communicated with the ventilation pipe 26, air or oxygen is conveyed into the ventilation chamber 22 through the ventilation pipe 26 and then conveyed into the rotary kiln barrel 11 from the ventilation chamber 22, when gas is conveyed, the sliding block 24 is abutted against the ventilation chamber 22 and can move along the guide rail 23 under the extrusion of the elastic piece 25, the sliding block 24 is always abutted against the side wall of the ventilation chamber 22, the sealing connection during the gas conveying is realized, and the air leakage is avoided. The amount of air or oxygen introduced into the rotary kiln cylinder is controlled by controlling the air pressure of the air or oxygen filled into the vent pipe 26, so that the oxidation and reduction roasting atmosphere is controlled, the production efficiency is high, and the device realizes the complex mineral oxidation-reduction process.

Further, the elastic member 25 is preferably a spring, and the other end of the spring is usually fixed to the ground or other fixing member.

Further, the number of the one-way air intake valves 221 may be multiple, and the multiple one-way air intake valves 221 are distributed at different positions on the sidewall of the ventilation chamber, so as to be conveniently communicated with the ventilation pipe.

In addition to the above embodiments, the pneumatic member 2 of the present embodiment further includes a bracket 27, one end of the bracket 27 is connected to the outer surface of the rotary kiln tube 11, the other end of the bracket 27 is connected to the ventilation chamber 22, and the bracket 27 is used to fix the ventilation chamber 22 to the outer surface of the rotary kiln tube 11. Further, the support 27 is preferably a triangular support, and a plurality of triangular supports are distributed along the annular space between the ventilation chamber 22 and the rotary kiln barrel 11, so that the ventilation chamber 22 and the rotary kiln barrel 11 are stably connected.

On the basis of the above embodiments, the outlet end of the conduit 21 of this embodiment is provided with a plurality of outlet holes 211, and the outlet holes 211 are used for introducing oxygen or air into the interior of the cylinder 11 of the rotary kiln. The plurality of air outlet holes 211 are used for ventilation, and the purpose is to effectively prevent mineral powder from entering the guide pipe 21 and blocking the guide pipe 21.

In addition to the above embodiments, the duct 21 of the present embodiment is a W-shaped duct having a high middle portion and two low ends, and the breather chamber 22 communicates with the high middle portion of the W-shaped duct 21. Part of the ore powder with smaller particles enters the guide tube 21 through the gas outlet holes 211, and the powder entering the guide tube 21 is gathered at the parts lower at the two ends by the high middle part and the low two ends of the guide tube 21.

On the basis of the above embodiments, the W-shaped conduit 21 of the present embodiment further includes an end cap 212, and the end cap 212 is detachably connected to the lower portions of the two ends of the W-shaped conduit 21. The end cap 212 is unscrewed to clean the powder entering the conduit 21.

On the basis of the above embodiment, the metal mineral roasting device of the present embodiment further includes a feeding bin 4, the feeding bin 4 includes a feeding pipe 41 and a flue gas chamber 42, a discharging end of the feeding pipe 41 passes through the flue gas chamber 42 to communicate with a feeding end of the rotary kiln barrel 11, and the feeding end of the feeding pipe 41 extends to the outside of the flue gas chamber 42. The roasted metal minerals enter the interior of the rotary kiln barrel 11 from the feeding end of the feeding pipe 41, and smoke generated by roasting the metal minerals in the interior of the rotary kiln barrel 11 is discharged from the smoke chamber 42.

In addition to the above embodiments, the flue gas chamber 42 of this embodiment is provided with a tail gas extraction opening 421, and the tail gas extraction opening 421 is used for extracting gas generated inside the rotary kiln barrel 11.

In addition to the above embodiments, the metal mineral roasting apparatus of the present embodiment further includes a discharge opening 5, and the discharge opening 5 is provided at the bottom of the combustion chamber 3. The roasted metal minerals enter the combustion chamber 3 and are discharged from a discharge port at the bottom of the combustion chamber 3.

On the basis of the above embodiments, the height of the discharge end of the rotary kiln barrel 11 relative to the horizontal plane is lower than the height of the feed end of the rotary kiln barrel 11 relative to the horizontal plane. The movement of the metal minerals in the rotary kiln barrel 11 is facilitated, and the smooth discharge of the roasted metal minerals is also facilitated.

On the basis of the above embodiments, the present embodiment further includes a supporting member 6, the supporting member 6 is disposed on the outer surface of the rotary kiln barrel 11, and the supporting member 6 is used for supporting the rotary kiln barrel 11.

On the basis of the above embodiment, the metal mineral roasting device of the embodiment further includes the temperature detector 7, the temperature detector 7 is installed on the outer surface of the rotary kiln cylinder 11, and the temperature detector 7 is used for monitoring the temperature of the rotary kiln cylinder 11, so as to conveniently adjust the internal temperature of the rotary kiln cylinder 11.

On the basis of the above embodiment, the metal mineral roasting apparatus of the present embodiment further includes a gas measurement component 8, the gas measurement component 8 is installed on the outer surface of the rotary kiln cylinder 11, and the gas measurement component 8 is used for detecting the amount of gas inside the rotary kiln cylinder 11.

In addition to the above embodiments, the material of the slider 24 of the present embodiment is a high temperature metal material, and is sealed by a graphite material, so that the slider 24 can slide relative to the annular ventilation chamber 22, and has good sealing performance and wear resistance.

In addition to the above embodiments, the wall of the rotary kiln body 11 in the present embodiment is provided with the refractory bricks 111, and the refractory bricks 111 improve the high temperature resistance of the rotary kiln body 11.

According to the metal mineral roasting device provided by the embodiment, the inflatable components 2, the temperature detector 7 and the gas measuring component 8 on the outer surface of the rotary kiln cylinder 11 can be arranged at any position of the rotary kiln cylinder 11, the number of the inflatable components can be 3-8 according to the length and the control requirement of the metal mineral roasting device, the applicability range to materials is wide, the number of the inflatable components 2 in the embodiment 1 is 2, and the inflatable components are respectively arranged at the feeding end and the middle part of the rotary kiln cylinder 11; the number of the temperature detectors 7 and the gas measuring components 8 is 3 respectively, and the temperature detectors and the gas measuring components are all devices which can be realized by the prior art, and the structures of the temperature detectors and the gas measuring components are not described in detail; the aeration quantity or atmosphere condition in the rotary kiln barrel 11 can be controlled by aeration pressure, and the rotary kiln is simple to operate, remarkable in effect and easy to control. Other oxidants are not needed to be added during oxidizing roasting; the reaction process can be realized by controlling the temperature and atmosphere in the roasting process in the magnetization reduction process or the direct reduction process, and the gas generated by roasting is extracted from the tail gas pumping hole 421 through the gas pump, collected and recycled for the useful components, so that the environment is not polluted, and the comprehensive utilization of various resources can be realized.

Application example 1

The metal mineral roasting device in example 1 was used for processing lead-zinc containing refractory hematite, specifically:

firstly, crushing refractory hematite containing iron, sulfur and lead and zinc with the content of 47.5 percent, 1.25 percent, 0.39 percent and 0.30 percent respectively to obtain powder with the particle size of-2.0 mm; a small amount (2%) of reduced coal powder is added into the powder, the reduced coal powder is added into the metal mineral roasting device in the embodiment 1, air is filled into the rotary kiln cylinder body 11 through the air charging component 2, the oxidation roasting desulfurization is carried out at the temperature of 600 ℃, and sulfur in the sulfur-containing iron ore powder is oxidized to generate SO₂And the desulfurization effect is realized. Reducing and roasting at 1200 ℃ for 60min, grinding and grading to obtain 88% slurry of-0.037 mm, magnetically separating to obtain iron concentrate with magnetic field strength of 120kA/m and iron grade of 88.36%, iron recovery rate of 85.15%, sulfur content in iron concentrate reduced to below 0.10%, and harmful elements Pb and Zn eliminated in 97.36% and 95.39%.

Application example 2

The metal mineral roasting apparatus of example 1 was used to process hematite, specifically:

firstly, the sulfur content and the iron content are respectively 3.2% and 45.39% of hematite are crushed to obtain-2 mm powder, then the powder is added into the metal mineral roasting device in the embodiment 1, air is filled into the rotary kiln cylinder body 11 through the air filling part 2, and after the high-temperature roasting at the temperature of 800 ℃ is carried out for 60min, a small amount of pyrrhotite in the hematite and sulfur in the pyrite are oxidized into SO₂A gas. Then, in the magnetizing roasting reduction stage of the device, the reduction temperature is controlled to be 800 ℃ to obtain a magnetizing roasted ore product, and then the magnetizing roasted ore product is magnetically separated to obtain the iron concentrate product with the iron grade of 63.52 percent and the iron recovery rate of 87.20 percent, wherein the sulfur content of the obtained product is reduced to 0.13 percent from 3.2 percent.

Application example 3

The metal mineral roasting apparatus of example 1 was used to treat copper smelting tailings, specifically:

firstly, copper smelting tailings with iron content of 43.18 percent, 1.56 percent of sulfur, 3.25 percent of lead and 2.63 percent of zinc are mixed together with bentonite (binder), limestone (additive) and reducing coal (reducing agent) according to the proportion of 100:3:10:25, and then the mixture is pelletized in a disc pelletizer. Then the produced pellets are added into the metal mineral roasting device provided in example 1, air is charged into the rotary kiln cylinder body 11 through the gas charging component 2, reduction roasting is carried out at the high temperature of 1250 ℃, and the obtained product is subjected to a first stage of ore grinding process to obtain slurry with the thickness of-0.074 mm accounting for 73.20%. Through magnetic separation, the magnetic field intensity is 142kA/m, the grade of the obtained reduced iron powder is 90.35 percent, the recovery rate is 86.23 percent, and the sulfur content is 0.06 percent. Obtaining tail gas containing Pb and Zn, collecting the tail gas by a tail gas recovery facility to obtain roasting soot, and extracting Pb and Zn from the subsequent soot to realize the comprehensive utilization of solid waste resources.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.