CN107338356B - A kind of shaft cooler furnace a tail wind recycling technique - Google Patents
A kind of shaft cooler furnace a tail wind recycling technique Download PDFInfo
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- CN107338356B CN107338356B CN201710533023.2A CN201710533023A CN107338356B CN 107338356 B CN107338356 B CN 107338356B CN 201710533023 A CN201710533023 A CN 201710533023A CN 107338356 B CN107338356 B CN 107338356B
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- shaft cooler
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/26—Cooling of roasted, sintered, or agglomerated ores
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/08—Chloridising roasting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to tail gas recycle fields, specifically disclose a kind of shaft cooler furnace a tail wind recycling technique.The technique are as follows: be packed into high temperature iron pelletizing from the top of shaft cooler, heat exchange is carried out during reverse flow in shaft cooler through cold air and high temperature iron pelletizing, make the temperature of high temperature iron pelletizing be reduced to 100 DEG C hereinafter, there is a small amount of metal chloride to volatilize in pelletizing cooling procedure simultaneously；Temperature is increased to 400 DEG C or so after cold air passes through heat exchange, becomes hot-air；Hot-air a part is discharged from the hole in the middle part of shaft cooler, sends to subsequent handling；Another part is discharged from the hole on shaft cooler top, and rotary kiln is returned after valuable metal chloride therein is recycled in cyclone dust collection and recycles thermal energy therein.The present invention is recycled furnace a tail wind, on the one hand recycles heat therein, the call of response national energy-saving consumption reduction；On the other hand precious metal chloride therein is recycled, improves metal recovery rate.
Description
Technical field
Production the present invention relates to metallurgical technology field, after being related to the group of iron ball made of pyrite cinder high-temperature roasting chlorinated gold extracting
A kind of method that product are cooling, valuable metal chloride and waste heat recycle, and in particular to shaft cooler furnace a tail wind recycling work
Skill.
Background technique
Pyrite cinder is with addition of a certain amount of calcium chloride solution, through profit mill, pelletizing, into rotary kiln in carry out high-temp chlorination roasting
It burns, 1100~1250 DEG C of maturing temperature, the valuable metal reaction in pelletizing generates chloride-sublimation, while pelletizing is consolidated, and is become
At high intensity roast ball, into shaft cooler in cooled down.
Cold air is blasted in shaft cooler by centrifugal blower and is contacted with high temperature pelletizing (temperature > 800 DEG C), and hot friendship is carried out
Cooling pelletizing is changed, pelletizing temperature is down to 80 DEG C or so.Air after heat exchange goes out from the furnace last row of shaft cooler, temperature
Degree is increased to 400 DEG C or so, while may still have a small amount of metal chloride to volatilize in pelletizing cooling procedure, returns to furnace a tail wind
It receives and utilizes, on the one hand recycle heat therein, the call of response national energy-saving consumption reduction；On the other hand your gold therein can be recycled
Belong to chloride, improves metal recovery rate.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of shaft cooler furnace a tail winds to recycle technique, the technique
It is recycled including the recuperation of heat of furnace a tail wind and metal chloride, has on the one hand recycled the heat in furnace a tail wind, reached energy-saving mesh
, the precious metal chloride in another aspect recovery furnace a tail wind improves metal recovery rate.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: the shaft cooler furnace a tail wind recycling benefit
With technique, specifically includes the following steps:
It (1) is 800~1200 DEG C by the temperature after high-temperature roasting, average particle size is the high temperature iron pelletizing of 12~18mm, from
The top of shaft cooler is packed into, and opens up the hole of 570~630mm of diameter on the middle part of shaft cooler and top；
(2) cold air is passed through from the lower part of shaft cooler, the high temperature iron pelletizing and cold air are in shaft cooler
Interior reverse flow, the temperature to the high temperature iron pelletizing be reduced to 100 DEG C hereinafter, cooled iron ball group from shaft cooler
Lower part discharge, while thering is a small amount of metal chloride to evaporate into cold air in pelletizing cooling procedure；The cold air pass through with
After high temperature iron pelletizing heat exchange, temperature is increased to 300~450 DEG C, becomes hot-air；
(3) above-mentioned hot-air a part is discharged from the hole in the middle part of shaft cooler, sends to subsequent handling use；Another portion
Divide and be discharged from the hole on shaft cooler top, is added after valuable metal chloride therein is recycled in cyclone dust collection, then through high temperature
Rotary kiln is returned after pressure fan recycles thermal energy therein.
Preferably, above-mentioned shaft cooler furnace a tail wind recycles technique, in step (2), the temperature of the high temperature iron pelletizing
Degree is reduced to 50~90 DEG C.
Wherein, above-mentioned shaft cooler furnace a tail wind recycles technique, in step (3), the high-temperature blower and rotary kiln
The pipeline enclosure of connection is equipped with air quantity and adjusts flowmeter.
Wherein, above-mentioned shaft cooler furnace a tail wind recycles technique, and in step (3), the hot-air is from high-temperature pressurizing
After being come out in blower, and coal gas and First air, after burning in burner noz(zle), into rotary kiln.
Wherein, above-mentioned shaft cooler furnace a tail wind recycles technique, and in step (3), the subsequent handling is that ore pulp soaks
Heating process or calcium chloride heat enrichment process out.
Compared with prior art, the beneficial effects of the present invention are: present invention is generally directed to iron ball groups made of pyrite cinder
Product cooling, valuable metal chloride and waste heat recycling after high-temperature roasting chlorinated gold extracting provide a kind of new technique, the work
Skill will carry out the cold air of heat exchange with high temperature iron pelletizing, i.e., final furnace a tail wind (i.e. hot-air) is handled: a part
Heat enters subsequent handling, and a part of heat enters rotary kiln and recycles, and reaches mesh that is energy-saving, reducing production cost
's.Meanwhile the precious metal chloride in the technology utilization cyclone dust collection recovery furnace a tail wind (i.e. hot-air), not only increase metal
The rate of recovery, and avoid precious metal chloride and pollute the environment.
Detailed description of the invention
Fig. 1 is the flow diagram that shaft cooler furnace a tail wind of the present invention recycles technique.
Specific embodiment
The present invention provides a kind of shaft cooler furnace a tail wind recycle technique, the technique specifically includes the following steps:
It (1) is 800~1200 DEG C by the temperature after high-temperature roasting, average particle size is the high temperature iron pelletizing of 12~18mm, from
The top of shaft cooler is packed into；And the hole of 570~630mm of diameter is opened up on the middle part of shaft cooler and top；
(2) cold air is passed through from the lower part of shaft cooler, the high temperature iron pelletizing and cold air are in shaft cooler
Interior reverse flow, the temperature to the high temperature iron pelletizing be reduced to 100 DEG C hereinafter, cooled iron ball group from shaft cooler
Lower part discharge, while thering is a small amount of metal chloride to evaporate into cold air in pelletizing cooling procedure；The cold air pass through with
After high temperature iron pelletizing heat exchange, temperature is increased to 300~450 DEG C, becomes hot-air；
(3) above-mentioned hot-air a part is discharged from the hole in the middle part of shaft cooler, sends to subsequent handling recycling；Separately
A part is discharged from the hole on shaft cooler top, after valuable metal chloride therein is recycled in cyclone dust collection, then through height
Warm booster fan after burning in burner noz(zle), returns to rotary kiln and recycles thermal energy therein with coal gas and First air.
Preferably, above-mentioned shaft cooler furnace a tail wind recycles technique, in step (2), the temperature of the high temperature iron pelletizing
Degree is reduced to 50~90 DEG C.
Wherein, above-mentioned shaft cooler furnace a tail wind recycles technique, in step (3), the high-temperature pressurizing blower with return
The pipeline enclosure of rotary kiln connection installs an air quantity and adjusts flowmeter, for controlling the air quantity for returning to rotary kiln and using, to guarantee back
Turn kiln temperature to stablize.
Wherein, above-mentioned shaft cooler furnace a tail wind recycles technique, and in step (3), the subsequent handling can be to appoint
The process that meaning needs to heat (i.e. supply heat), such as ore pulp leaches heating process, calcium chloride heats enrichment process.
Below in conjunction with specific embodiment, the present invention will be further explained, but is not intended to limit the present invention
Protection scope.
Embodiment 1
Shaft cooler furnace a tail wind recycle technique, the technique specifically includes the following steps:
It (1) is 1100 DEG C by the temperature after high-temperature roasting, average particle size is the high temperature iron pelletizing of 13mm, from shaft cooler
Top be packed into；And the hole of diameter 580mm is opened up on the middle part of shaft cooler and top；
(2) cold air is passed through by centrifugal blower from the lower part of shaft cooler, the high temperature iron pelletizing and cold air
The reverse flow in shaft cooler, the temperature to the high temperature iron pelletizing are reduced to 80 DEG C, and cooled iron ball is rolled into a ball from vertical
The lower part of cooler is discharged, while having a small amount of metal chloride to evaporate into cold air in pelletizing cooling procedure；The cold sky
Gas passes through with after high temperature iron pelletizing heat exchange, and temperature is increased to 400 DEG C, becomes hot-air；
(3) above-mentioned hot-air a part is discharged from the hole in the middle part of shaft cooler, sends to calcium chloride CONCENTRATION PLANT to chlorine
Change calcium and is evaporated concentration；Another part is discharged from the hole on shaft cooler top, gathers dust recycling wherein through cyclone separator
Valuable metal chloride after, then through two high-temperature pressurizing blowers, returned after burning in burner noz(zle) with coal gas and First air
Huis rotary kiln recycles thermal energy therein；The pipeline enclosure that the high-temperature pressurizing blower is connect with rotary kiln installs an air quantity and adjusts stream
Meter, for controlling the air quantity for returning to rotary kiln and using, to guarantee that rotary kiln temperature is stablized.
Embodiment 2
Shaft cooler furnace a tail wind recycle technique, the technique specifically includes the following steps:
It (1) is 1000 DEG C by the temperature after high-temperature roasting, average particle size is the high temperature iron pelletizing of 16mm, from shaft cooler
Top be packed into；And the hole of diameter 580mm is opened up on the middle part of shaft cooler and top；
(2) cold air is passed through by centrifugal blower from the lower part of shaft cooler, the high temperature iron pelletizing and cold air
The reverse flow in shaft cooler, the temperature to the high temperature iron pelletizing are reduced to 90 DEG C, and cooled iron ball is rolled into a ball from vertical
The lower part of cooler is discharged, while having a small amount of metal chloride to evaporate into cold air in pelletizing cooling procedure；The cold sky
Gas passes through with after high temperature iron pelletizing heat exchange, and temperature is increased to 410 DEG C, obtains hot-air；
(3) above-mentioned hot-air a part is discharged from the hole in the middle part of shaft cooler, sends to ore pulp and leaches heating process；Separately
A part is discharged from the hole on shaft cooler top, after cyclone separator gathers dust and recycles valuable metal chloride therein,
It after burning in burner noz(zle), returns to rotary kiln with coal gas and First air through two high-temperature pressurizing blowers again and recycles heat therein
Energy；The pipeline enclosure that the high-temperature pressurizing blower is connect with rotary kiln installs an air quantity and adjusts flowmeter, returns back for controlling
The air quantity that rotary kiln uses, to guarantee that rotary kiln temperature is stablized.
Embodiment 3
Shaft cooler furnace a tail wind recycle technique, the technique specifically includes the following steps:
It (1) is 1000 DEG C by the temperature after high-temperature roasting, average particle size is the high temperature iron pelletizing of 16mm, from shaft cooler
Top be packed into；And the hole of diameter 630mm is opened up on the middle part of shaft cooler and top；
(2) cold air is passed through by centrifugal blower from the lower part of shaft cooler, the high temperature iron pelletizing and cold air
The reverse flow in shaft cooler, the temperature to the high temperature iron pelletizing are reduced to 50 DEG C, and cooled iron ball is rolled into a ball from vertical
The lower part of cooler is discharged, while having a small amount of metal chloride to evaporate into cold air in pelletizing cooling procedure；The cold sky
Gas passes through with after high temperature iron pelletizing heat exchange, and temperature is increased to 450 DEG C, becomes hot-air；
(3) above-mentioned hot-air a part is discharged from the hole in the middle part of shaft cooler, sends to ore pulp and leaches heating process；Separately
A part is discharged from the hole on shaft cooler top, after cyclone separator gathers dust and recycles valuable metal chloride therein,
It after burning in burner noz(zle), returns to rotary kiln with coal gas and First air through two high-temperature pressurizing blowers again and recycles heat therein
Energy；The pipeline enclosure that the high-temperature pressurizing blower is connect with rotary kiln installs an air quantity and adjusts flowmeter, returns back for controlling
The air quantity that rotary kiln uses, to guarantee that rotary kiln temperature is stablized.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art, is not being taken off
Under the premise of from structure of the invention, various modifications and improvements can be made, these should also be as being considered as protection scope of the present invention,
These all will not influence the practicability of effect and this patent that the present invention is implemented.
Claims (2)
1. shaft cooler furnace a tail wind recycle technique, which is characterized in that the technique specifically includes the following steps:
It (1) is 1000 DEG C by the temperature after high-temperature roasting, average particle size is iron ball group made of the high-temperature sulfuric acid slag of 16mm, from
The top of shaft cooler is packed into, and opens up the hole of diameter 630mm on the middle part of shaft cooler and top；
(2) cold air is passed through from the lower part of shaft cooler, the high temperature iron pelletizing and cold air are inverse in shaft cooler
To flowing, the temperature to the high temperature iron pelletizing is reduced to 50 DEG C, and cooled iron ball group is discharged from the lower part of shaft cooler,
There is a small amount of metal chloride to evaporate into cold air in pelletizing cooling procedure simultaneously；The cold air passes through and high temperature iron pelletizing
After heat exchange, temperature is increased to 450 DEG C, becomes hot-air；
(3) above-mentioned hot-air a part is discharged from the hole in the middle part of shaft cooler, sends to subsequent handling use；Another part from
It is discharged in the hole on shaft cooler top, after valuable metal chloride therein is recycled in cyclone dust collection, then through high-temperature pressurizing wind
After machine, with coal gas and First air, rotary kiln is returned after burning in burner noz(zle) and recycles thermal energy therein；The high-temperature pressurizing wind
The pipeline enclosure that machine is connect with rotary kiln is equipped with air quantity and adjusts flowmeter.
2. shaft cooler furnace a tail wind according to claim 1 recycles technique, which is characterized in that in step (3), institute
Stating subsequent handling is that ore pulp leaches heating process or calcium chloride heats enrichment process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710533023.2A CN107338356B (en) | 2017-07-03 | 2017-07-03 | A kind of shaft cooler furnace a tail wind recycling technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710533023.2A CN107338356B (en) | 2017-07-03 | 2017-07-03 | A kind of shaft cooler furnace a tail wind recycling technique |
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| Publication Number | Publication Date |
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| CN107338356A CN107338356A (en) | 2017-11-10 |
| CN107338356B true CN107338356B (en) | 2019-05-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108866327A (en) * | 2018-05-31 | 2018-11-23 | 江苏东九重工股份有限公司 | A kind of high temperature pelletizing cooling means and its device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103266A (en) * | 1984-08-24 | 1986-10-22 | Skf钢铁工程公司 | The method and apparatus of cooling pellets |
| CN102242254A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | High sulfide pyrite pellet reinforced roasting consolidation technology |
| CN102534188A (en) * | 2012-01-20 | 2012-07-04 | 个旧市富祥工贸有限责任公司 | Method for producing iron pellet with sulfur acid residue containing large contents of impurities and enriching valuable metal |
| CN104846194A (en) * | 2015-03-16 | 2015-08-19 | 北京矿冶研究总院 | Cooling method of chloridized roasted pellets |
-
2017
- 2017-07-03 CN CN201710533023.2A patent/CN107338356B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103266A (en) * | 1984-08-24 | 1986-10-22 | Skf钢铁工程公司 | The method and apparatus of cooling pellets |
| CN102242254A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | High sulfide pyrite pellet reinforced roasting consolidation technology |
| CN102534188A (en) * | 2012-01-20 | 2012-07-04 | 个旧市富祥工贸有限责任公司 | Method for producing iron pellet with sulfur acid residue containing large contents of impurities and enriching valuable metal |
| CN104846194A (en) * | 2015-03-16 | 2015-08-19 | 北京矿冶研究总院 | Cooling method of chloridized roasted pellets |
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| CN107338356A (en) | 2017-11-10 |
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