CN213687822U - Oxygen-enriched suspension roasting furnace - Google Patents
Oxygen-enriched suspension roasting furnace Download PDFInfo
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- CN213687822U CN213687822U CN202022353353.3U CN202022353353U CN213687822U CN 213687822 U CN213687822 U CN 213687822U CN 202022353353 U CN202022353353 U CN 202022353353U CN 213687822 U CN213687822 U CN 213687822U
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Abstract
An oxygen-enriched suspension roasting furnace belongs to the technical field of roasting equipment. The oxygen-enriched suspension roasting furnace comprises a furnace bottom oxygen-enriched mixed air chamber, a suspension roasting section, a long expansion section, a short straight section and a furnace cover, wherein an oxygen-enriched air inlet pipe is arranged at the lower part of the furnace bottom oxygen-enriched mixed air chamber, and an oxygen-enriched air is arranged at the furnace bottomThe mixed air chamber is internally provided with a furnace bottom discharge pipe, the suspension roasting section is provided with a cooling pipe bundle, a furnace door, a solid particle spray gun, a charging opening, a calcine discharge opening and a burner, the long expanding section is provided with a secondary air opening and a solid particle spray gun, and the furnace cover is provided with a smoke discharge opening, a temperature measuring hole and a concentrate ore pulp spray gun. The utility model discloses can realize high-efficient, safety, stably carry out oxygen-enriched fluidization calcination to the concentrate, bake burning furnace bed ability height over a slow fire and reach 6 ~ 8 t/(m)2D), the working condition fluidization linear velocity is 0.5-1.0 m/s, the produced calcine has good quality, and the valuable metal leaching rate is high.
Description
Technical Field
The utility model belongs to the technical field of firing equipment, a sulphur concentrate firing equipment such as copper, cobalt, gold, iron, molybdenum contains especially relates to a concentrate oxygen boosting suspension roasting equipment.
Background
In general, when the fluidized roaster cannot perform self-heating roasting, fuels such as sulfur, granulated coal and the like need to be supplemented into the furnace. The addition of sulphur results in an increased yield of sulphuric acid, which is limited for countries and regions where sulphuric acid is not well sold; if sulfur-free fuel such as coal pellets is added, SO in flue gas can be caused2The concentration is reduced to the extent that the requirements of the traditional acid making process cannot be met. The oxygen-enriched roasting process can solve the problem that low-sulfur concentrate is difficult to roast by self-heating, can enable the flue gas to meet the requirements of the traditional acid making process, and has less sulfuric acid output than a roasting process by adding sulfur, thereby having wide adaptability.
The traditional fluidized roasting furnace has a longer roasting section, a shorter expansion section and a small gradient of the expansion section, does not have a high-efficiency and safe solid particle (sulfur, granular coal and the like) spray gun, does not have a device capable of removing the excess heat energy, and has a lower fluidization linear velocity of about 0.3 m/s. Oxygen-enriched roasting is directly adopted on the traditional fluidized roasting furnace, so that the roasted sand agglomeration is increased; when copper-cobalt-sulfur concentrate is roasted, large-area bonding blocks are generated on the side wall of the roasting furnace; when the heat of the roasting furnace is excessive, the temperature can be reduced only by spraying water, and when the heat of the roasting furnace is insufficient, a safe, stable and cheap fuel supplementing mode is not available. The problems lead to that the oxygen-enriched roasting is directly adopted on the traditional fluidized roasting furnace, the production and operation are unstable, the quality of the produced roasted sand is poor, and the waste heat generated in the roasting process can not be fully utilized. Therefore, the development of an efficient, safe and stable oxygen-enriched suspension roasting furnace is an urgent problem to be solved.
Disclosure of Invention
The utility model aims at providing an oxygen boosting suspension bakes burning furnace over a slow fire, should bake burning furnace over a slow fire and can realize high-efficient, safe, stable carry out oxygen boosting fluidization calcination to the concentrate, bake burning furnace bed ability height over a slow fire and reach 6 ~ 8 t/(m)2D), the working condition fluidization linear velocity is 0.5-1.0 m/s, the calcine is not easy to generate bonding blocks on the inner side wall of the furnace, the produced calcine has good quality, and the valuable metal leaching rate is high.
The utility model discloses the technical scheme who adopts as follows:
an oxygen-enriched suspension roasting furnace is characterized by comprising a furnace bottom oxygen-enriched mixed air chamber, a suspension roasting section, a long expansion section, a short straight section and a furnace cover from bottom to top. An oxygen-enriched air inlet pipe is arranged at the lower part of the furnace bottom oxygen-enriched mixed air chamber, and oxygen-enriched air conveyed from the air inlet pipe can be further uniformly mixed in the furnace bottom oxygen-enriched mixed air chamber, so that the stability of the oxygen-enriched roasting process is ensured. A furnace bottom discharging pipe is arranged in the furnace bottom oxygen-enriched mixed air chamber, and the top end of the furnace bottom discharging pipe is communicated with the bottom of the suspension roasting section. The side wall of the suspension roasting section is provided with a cooling tube bundle, a furnace door, a solid particle spray gun, a charging opening, a roasted sand discharging opening and a combustor; the long expansion section is provided with a secondary air port and a solid particle spray gun; the cooling tube bundle can remove excessive heat energy, and the solid particle spray gun can efficiently and safely supplement solid particles (sulfur, coal granules and the like) according to needs. The short straight section is not provided with a feed inlet and an air supply outlet; the furnace cover is provided with a smoke exhaust port, a concentrate ore pulp spray gun and a temperature measuring hole.
Furthermore, the side wall structures of the suspension roasting section, the long expanding section and the short straight section are respectively a steel plate shell, a refractory fiber plate, a heat insulation layer and a refractory brick layer from outside to inside.
Furthermore, the furnace bottom oxygen-enriched mixed air chamber, the suspension roasting section and the long expansion section are provided with temperature/pressure measuring holes.
Furthermore, a manhole is arranged on the furnace bottom oxygen-enriched mixed air chamber.
Furthermore, the inner side of the bottom of the suspension roasting section is made of high-temperature-resistant and wear-resistant castable and is provided with a hood air distribution structure.
Furthermore, a quick opening door is arranged at the bottom end of the furnace bottom discharge pipe.
Further, the length of the short straight section is 1/10-1 of the length of the long expanding section.
Furthermore, a circular dome formed by heat-resistant special-shaped bricks is arranged inside the furnace cover, and a light heat-insulating refractory pouring material layer and an external steel shell are sequentially arranged on the upper parts of the heat-resistant special-shaped bricks.
Adopt the utility model discloses the advantage of burning furnace is baked over a slow fire in oxygen boosting suspension has: the operation of roasting furnace equipment is efficient, safe and stable, self-heating roasting can be realized or only a small amount of sulfur needs to be supplemented, and the capacity of a roasting furnace bed is up to 6-8 t/(m)2D), under the condition of the same treatment capacity, compared with the traditional roasting furnace, the oxygen-enriched suspension roasting furnace has lower manufacturing cost, the produced roasted product has good quality and high leaching rate of valuable metals, and the residual heat and the flue gas SO in the roasting process can be recovered2The concentration can meet the requirements of the traditional acid making process.
Drawings
Fig. 1 is a schematic structural diagram of the oxygen-enriched suspension roasting furnace provided by the present invention.
In the figure: 1 an oxygen-enriched air inlet pipe; 2, a furnace bottom oxygen-enriched mixed air chamber; 3, a furnace door; 4 cooling the tube bundle; 5, a suspension roasting section; 6, a feed inlet; 7 temperature/pressure measuring hole; 8 long expansion sections; 10 short straight sections; 11, furnace covers; 12 a concentrate pulp spray gun; 13 temperature measuring holes; 14 a smoke exhaust port; 15 a solid particle spray gun; 16 secondary air ports; 17 a burner; 19 a calcine discharge outlet; 21 furnace bottom oxygen-enriched mixed air chamber manhole; 22 a furnace bottom discharge pipe.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
An oxygen-enriched suspension roasting furnace comprises a furnace bottom oxygen-enriched mixed air chamber 2, a suspension roasting section 5, a long expansion section 8, a short straight section 10 and a furnace cover 11 from bottom to top, wherein the ratio of the length of the short straight section 10 to the length of the long expansion section 8 is 1/10-1. The side wall structures of the suspension roasting section 5, the long expanding section 8 and the short straight section 10 are respectively a steel plate shell, a refractory fiber plate, a heat preservation layer and a refractory brick layer from outside to inside. The material of the steel plate shell of the roasting furnace can be selected from common carbon steel, high-temperature-resistant carbon steel, stainless steel and the like, and all parts of the steel plate shell of the roasting furnace are in welded connection. The oxygen-enriched gas delivered from the pipeline can be further uniformly mixed in the furnace bottom oxygen-enriched mixed air chamber 2, so that the stability of the oxygen-enriched roasting process is ensured. 1-8 furnace bottom material discharging pipes 22 are arranged in the furnace bottom oxygen-enriched mixed air chamber 2, the top ends of the discharging pipes are communicated with the bottom of the suspension roasting section 5, and a quick opening door is arranged at the bottom end. The suspension roasting section 5 is provided with a cooling tube bundle 4, a furnace door 3, a solid particle spray gun 15, a charging opening 6, a roasted product discharge opening 19, a combustor 17 and a temperature/pressure measuring hole 7. The long expanding section 8 is provided with a secondary air port 16, a solid particle spray gun 15 and a temperature/pressure measuring hole 7. The short straight section 10 is not provided with a feed inlet and an air supply outlet; a smoke dust discharge port 14 is arranged in the center of the furnace cover 11, and a concentrate ore pulp spray gun 12 and a temperature measuring hole 13 are uniformly distributed on the furnace cover 11.
The lower part of the furnace bottom oxygen-enriched mixed wind chamber 2 is welded with an oxygen-enriched air inlet pipe 1, the oxygen-enriched outlet of the pipeline in the wind chamber faces downwards, the drift diameter of the pipeline is DN 500-DN 1000, and the material is carbon steel or stainless steel. The furnace bottom oxygen-enriched mixed air chamber 2 is in a big-end-up form and is provided with 1-3 manholes, 1-4 pressure measuring holes and 1-4 temperature measuring holes. The furnace bottom discharge pipe 22 passes through the furnace bottom oxygen-enriched mixing air chamber 2 and is communicated with the bottom of the suspension roasting section, the diameter of the discharge pipe is DN 30-DN 300, the material is carbon steel or stainless steel, and the discharge pipe can discharge large-particle sintered materials formed in the suspension roasting section.
The inner side of the bottom of the suspension roasting section 5 adopts high-temperature-resistant and wear-resistant castable and is provided with a hood air distribution structure. 5 lateral walls in suspension calcination section are equipped with 1 ~ 8 sets of cooling tube bundles, 31 ~ 6 of furnace gate, 1 ~ 8 sets of solid particle spray gun, 1 ~ 8 of charge door, 1 ~ 2 and 1 ~ 6 sets of combustor of calcine bin outlet. 2-6 layers of temperature measuring holes and pressure measuring holes are uniformly distributed in 5 circles of the suspension roasting section, the number of the temperature measuring holes in each layer is 2-8, and the number of the pressure measuring holes in each layer is 1-4.
The middle part of the long expanding section 8 is provided with 1-6 secondary air ports and 1-6 solid particle spray guns. 2-6 layers of temperature measuring holes and pressure measuring holes are uniformly distributed in 8 circles of the long expansion section, the number of the temperature measuring holes in each layer is 1-4, and the number of the pressure measuring holes in each layer is 1-3.
The furnace cover 11 is internally provided with a circular dome formed by heat-resistant special-shaped bricks, and the upper parts of the heat-resistant special-shaped bricks are sequentially provided with a light heat-insulating fireproof pouring material layer and an external steel shell. The center of the furnace cover 11 is provided with 1 smoke dust discharge port, 1-8 sets of uniformly distributed ore concentrate slurry spray guns and 1-6 temperature measuring holes.
Claims (8)
1. An oxygen-enriched suspension roasting furnace is characterized by comprising a furnace bottom oxygen-enriched mixed air chamber (2), a suspension roasting section (5), a long expansion section (8), a short straight section (10) and a furnace cover (11) from bottom to top; an oxygen-enriched air inlet pipe (1) is arranged at the lower part of the furnace bottom oxygen-enriched mixed air chamber (2), a furnace bottom discharging pipe (22) is arranged in the furnace bottom oxygen-enriched mixed air chamber (2), and the top end of the furnace bottom discharging pipe (22) is communicated with the bottom of the suspension roasting section (5); the side wall of the suspension roasting section (5) is provided with a cooling tube bundle (4), a furnace door (3), a solid particle spray gun (15), a feed inlet (6), a roasted sand discharge outlet (19) and a combustor (17); the long expanding section (8) is provided with a secondary air port (16) and a solid particle spray gun (15); the furnace cover (11) is provided with a smoke exhaust port (14), a concentrate ore pulp spray gun (12) and a temperature measuring hole (13).
2. An oxygen-enriched suspension roasting furnace according to claim 1, characterized in that the side wall construction of the suspension roasting section (5), the long expanding section (8) and the short straight section (10) is steel plate shell, refractory fiber plate, insulating layer, refractory brick layer from outside to inside.
3. An oxygen-enriched suspension roasting furnace according to claim 1, characterized in that the bottom oxygen-enriched mixing air chamber (2) is provided with a temperature/pressure measuring hole (7), the suspension roasting section (5) is provided with a temperature/pressure measuring hole (7), and the long expansion section (8) is provided with a temperature/pressure measuring hole (7).
4. An oxygen-enriched suspension roasting furnace according to claim 1, characterized in that the furnace bottom oxygen-enriched mixing plenum (2) is provided with a manhole (21).
5. An oxygen-enriched suspension roasting furnace according to claim 1, characterized in that the inner side of the bottom of the suspension roasting section (5) is made of refractory and wear-resistant castable and is provided with a hood air distribution structure.
6. An oxygen-enriched suspension roasting furnace according to claim 1, characterized in that the bottom end of said furnace bottom discharge pipe (22) is provided with a quick-opening door.
7. An oxygen-enriched suspension roasting furnace according to claim 1, characterized in that the length of the short straight section (10) is 1/10-1 of the length of the long expanded section (8).
8. An oxygen-enriched suspension roasting furnace according to claim 1, characterized in that the furnace cover (11) is internally provided with a circular dome formed by heat-resistant special bricks, and the upper parts of the heat-resistant special bricks are sequentially provided with a light heat-insulating refractory pouring material layer and an outer steel shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022353353.3U CN213687822U (en) | 2020-10-21 | 2020-10-21 | Oxygen-enriched suspension roasting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022353353.3U CN213687822U (en) | 2020-10-21 | 2020-10-21 | Oxygen-enriched suspension roasting furnace |
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| Publication Number | Publication Date |
|---|---|
| CN213687822U true CN213687822U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022353353.3U Active CN213687822U (en) | 2020-10-21 | 2020-10-21 | Oxygen-enriched suspension roasting furnace |
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| CN (1) | CN213687822U (en) |
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- 2020-10-21 CN CN202022353353.3U patent/CN213687822U/en active Active
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