CN101349432A - Pulverized coal burning method suitable for metallurgy high temperature rotary kiln material processing requirement - Google Patents
Pulverized coal burning method suitable for metallurgy high temperature rotary kiln material processing requirement Download PDFInfo
- Publication number
- CN101349432A CN101349432A CNA200810073760XA CN200810073760A CN101349432A CN 101349432 A CN101349432 A CN 101349432A CN A200810073760X A CNA200810073760X A CN A200810073760XA CN 200810073760 A CN200810073760 A CN 200810073760A CN 101349432 A CN101349432 A CN 101349432A
- Authority
- CN
- China
- Prior art keywords
- ton
- coal
- combustion
- kiln
- rotary kiln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
A powder coal burning method which meets materials processing requirements of a metallurgical high-temperature rotary kiln is composed of an atomization forward burning mode of the metallurgical high-temperature rotary kiln with operation temperature of 1100-1400DEG Cs, and the technical parameter suitable for the burning mode. The atomization forward burning mode comprises that materials conversely enter the kiln from the tail of the kiln, and power coals are atomized and sprayed from the head of the kiln through a burner to be forwardly burned. The technical parameter comprises the particle size of the power coals<=0.15mm, primary air: secondary air= 1:2-4, air-coal ratio: 5500-6500 normal cubic meter/ each ton of coal, and coal consumption: 0.30-0.35 ton per ton of materials. The powder coal burning method can reduce cinders and carbon residues from 8-15% to 2.1-2.7%, reduces energy consumption from 0.45-0.50 ton coal/ ton material to 0.30-0.35 ton coal/ ton material, saves energy 26.3-36.8%, reduces fuel cost from 900-1000 yuan/ ton material to 360-420 yuan/ ton material, and reduces raw material cost ratio by 55.8-62.1%.
Description
One, technical field
The present invention relates to the method for combustion of pulverized coal of non-ferrous metal metallurgy technical field, particularly a kind of suitable for metallurgy high temperature rotary kiln material processing requirement.
Two, background technology
The traditional coke combustion system of metallurgy high temperature rotary kiln is granular reverse mobile combustion-type.Coke grain and material add from the kiln tail, and combustion air (or oxygen-enriched air) is sent into (or suction) from kiln hood.Rotation along with the kiln body, fuel constantly moves toward kiln hood, and in the process that moves, heated by the gas of reverse flow, when fuel temperature reaches ignition point, with the combustion-supporting gas generation combustion reaction of flowing, emit heat, along with keeping of fuel moved toward kiln hood, the burning of fuel is also constantly being carried out, heat also constantly discharges, and combustion reaction institute liberated heat provides needed heat for the various reactions of material in the kiln, and the temperature of reaction zone (also crying the high-temperature region) reaches 1100～1400 ℃.Because fuel is to blend mutually with the material of handling; and coke size is thicker relatively; reach 1mm～20mm; so the contact gear ratio surface of fuel and combustion air is little; the coke quality is hard relatively in addition; burning velocity is slow; thereby have only part of fuel to obtain completing combustion generation carbon dioxide; and part of fuel is carried out imperfect combustion; generate carbon monoxide; the fuel liberated heat is reduced greatly, even a spot of fuel can't burn because of not contacting combustion air, also can't emit heat; this imperfect combustion and existence that can't combustion phenomena; directly cause unit consumption of fuel to raise, and show as combustion product and contain a certain amount of imperfect combustion coke grain or coke blacking, be commonly called as carbon residue.With regard to the iron vitriol slag of handling high indium zinc concentrate hydrometallurgy, desire will guarantee that 1100～1400 ℃ of furnace temperature and indium zinc volatility reach respectively more than 80% and 85%, Jiao's consumption of then handling material per ton reaches 0.45～0.50 ton, and the carbon residue rate reaches 8～15%, and fuel cost is up to 900～1000 yuan of/ton materials.Obviously this kind fuel combustion method is extremely unreasonable.
Summary of the invention
The object of the present invention is to provide a kind of method for combustion of pulverized coal of suitable for metallurgy high temperature rotary kiln material processing requirement.This method can guarantee the high temperature furnace temperature of rotary kiln, can reduce fuel consumption again, thereby reduce production costs, and increases economic benefit.
In order to achieve the above object, the technical solution used in the present invention is: a kind of method for combustion of pulverized coal of suitable for metallurgy high temperature rotary kiln material processing requirement, this method are that forward combustion system and the technical parameter that is suitable for this combustion system constitute in the atomizing of 1100～1400 ℃ of processing temperatures by metallurgy high temperature rotary kiln.
Described atomizing forward combustion system is meant that material advances by the kiln tail is contrary, and fine coal sprays into forward burning by burner from the kiln hood atomizing.
Described technical parameter is: pulverized coal particle size≤0.15mm; Wind: secondary wind=1: 2～4; Coal-air ratio 5500～6500 standard cubic meters/ton coal; 0.30～0.35 ton of/ton material of coal consumption.
The principle of institute of the present invention foundation:
1, after bunker coal carries out ball mill crushing, effectively increased the specific area of fuel; Before fuel combustion, with air (promptly a wind and secondary wind) fuel is atomized, fuel is fully contacted with combustion air, the contact gear ratio surface increases; In addition, the fine coal quality is more loose relatively, and contains a certain amount of volatile ingredient, burning velocity is faster than coke, not reaching completing combustion, just to enter the fine coal of slag few, so slag carbon residue only 2.1～2.7%, and traditional combustion method slag carbon residue is up to 8～15%.
2, Wu Hua fuel burns under the completing combustion state, emits more heat, thereby has reduced unit consumption of fuel.Fuel generates carbon dioxide when completing combustion, reaction equation is as follows:
C+O
2＝CO
2↑-393KJ (1)
And fuel generates carbon monoxide when imperfect combustion, and reaction equation is as follows:
C+O
2＝2CO↑-111KJ (2)
From (1), (2) reaction equation as can be seen, carbon is when completing combustion, every mole of liberated heat is 393KJ, and carbon is when imperfect combustion, and every mole of liberated heat only is 111KJ, and liberated heat obviously reduces, therefore, making fuel realize completing combustion, is energy-conservation key point, is the effective means that reduces unit consumption of fuel.
3, the fine coal among the present invention is to burn under suspended state, is not subjected to the obstruction of material, and original its burnt grain of the reverse mobile combustion-type of burnt grain is to ooze with material to lump together, and makes burning be subjected to the obstruction of material, and obviously, the former trends towards completing combustion more than the latter.
Outstanding feature of the present invention is:
1, the efficiency of combustion height of fuel, energy unit consumption is low, and energy-saving effect is obvious.Burn slag carbon residue and reduce to 2.1～2.7% by 8～15%, energy consumption is by 0.45～0.50 ton of Jiao/ton material, reduce to 0.30～0.35 ton of coal/ton material, energy-conservation 26.3～36.8%, fuel cost is reduced to 360～420 yuan of/ton materials by 900～1000 yuan of/ton materials, reduces fuel cost rate 55.8～62.1%.
2, process control is convenient, technical application.
Description of drawings
Fig. 1 is the method step block diagram of the method for combustion of pulverized coal of a kind of suitable for metallurgy high temperature rotary kiln material processing requirement of the present invention.
Four, the specific embodiment
By the following examples technical scheme of the present invention is further described.
Present embodiment is that concrete grammar step of the present invention is described.This method is that forward combustion system and the technical parameter that is suitable for this combustion system constitute in the atomizing of 1100～1400 ℃ of processing temperatures by metallurgy high temperature rotary kiln.Described atomizing forward combustion system is by compressor 1 air to be compressed to gas bag 2, be divided into wind and secondary wind, a wind is by an airduct 3, with in advance by disintegrating machine 5 be crushed to≤fine coal that 0.15mm and the dispenser 7 by feed bin 6 bottoms quantitatively provide delivers to the trunnion in the burner 8, secondary wind converges at burner inner ventury place by secondary air channel 4 and a wind simultaneously, in the lump fine coal is sprayed the burner of burner 8, and fine coal is atomized in the moment of leaving combustor nozzle, fine coal with atomizing sprays into rotary kiln 9 internal combustion at last, with kiln temperature rise to 1100～1400 ℃, material enters rotary kiln 9 by feed bin 10 through dispenser 11 dosings, distinguishes collecting in dust-precipitator 12 and slag bucket 13 through flue dust and kiln slag that heated volatile produces.
The concrete technical parameter that is suitable for this combustion system is: wind: secondary wind=1: 3; 6500 cubes of/ton coals of coal-air ratio; 1200～1300 ℃ of processing temperatures; Activity duration is 720 hours; Total inventory is 600 tons, and material contains zinc 9.5%, contains indium 0.17%; 180 tons of total coal consumptions; Output slag carbon residue 2.1%, the output kiln slag contains In0.032%, Zn0.84%, indium zinc volatility is respectively 84.2%, 92.4%.0.30 ton of coal of coal-fired unit consumption/ton material, energy-conservation 36.8% than the 0.475 ton of Jiao/ton material of coke firing method, 590 yuan of/ton materials of reduction fuel cost, reduction fuel cost rate 62.1%.
The combustion system that adopts is with embodiment 1.
Another technical parameter that is suitable for this combustion system is: wind: secondary wind=1: 2; 6000 cubes of/ton coals of coal-air ratio; 1250～1300 ℃ of processing temperatures; Activity duration is 600 hours; Total inventory is 500 tons, and material contains zinc 9.5%, contains indium 0.17%; 165 tons of total coal consumptions; Output slag carbon residue 2.5%, the output kiln slag contains In0.030%, Zn1.34%, indium zinc volatility is respectively 85.1%, 91.3%.0.33 ton of coal of coal-fired unit consumption/ton material, energy-conservation 30.5% than the 0.475 ton of Jiao/ton material of coke firing method, 544 yuan of/ton materials of reduction fuel cost, reduction fuel cost rate 57.3%.
The combustion system that adopts is with embodiment 1.
The another technical parameter that is suitable for this combustion system is: wind: secondary wind=1: 2; 5500 cubes of/ton coals of coal-air ratio; 1200～1300 ℃ of processing temperatures; Activity duration is 720 hours; Total inventory is 600 tons, and material contains zinc 9.5%, contains indium 0.17%; 189 tons of total coal consumptions; Output slag carbon residue 2.7%, the output kiln slag contains In0.032%, Zn1.14%, indium zinc volatility is respectively 84.2%, 91.9%.0.315 ton of coal of coal-fired unit consumption/ton material, energy-conservation 33.68% than the 0.475 ton of Jiao/ton material of coke firing method, 572 yuan of/ton materials of reduction fuel cost, reduction fuel cost rate 60.2%.
The combustion system that adopts is with embodiment 1.
Another technical parameter that is suitable for this combustion system is: wind: secondary wind=1: 4; 6400 cubes of/ton coals of coal-air ratio; 1300～1350 ℃ of processing temperatures; Activity duration is 720 hours; Total inventory is 600 tons, and material contains zinc 9.5%, contains indium 0.17%; 210 tons of total coal consumptions; Output slag carbon residue 2.2%, the output kiln slag contains In0.026%, Zn1.72%, indium zinc volatility is respectively 86.3%, 89.5%.0.35 ton of coal of coal-fired unit consumption/ton material, energy-conservation 26.3% than the 0.475 ton of Jiao/ton material of coke firing method, 530 yuan of/ton materials of reduction fuel cost, reduction fuel cost rate 55.8%.。
Claims (3)
1, a kind of method for combustion of pulverized coal of suitable for metallurgy high temperature rotary kiln material processing requirement, it is characterized in that this method is that forward combustion system and the technical parameter that is suitable for this combustion system constitute in the atomizing of 1100～1400 ℃ of processing temperatures by metallurgy high temperature rotary kiln.
2, the method for combustion of pulverized coal of a kind of suitable for metallurgy high temperature rotary kiln material processing requirement according to claim 1 is characterized in that, described atomizing forward combustion system is meant that material advances by the kiln tail is contrary, and fine coal sprays into forward burning by burner from the kiln hood atomizing.
3, the method for combustion of pulverized coal of a kind of suitable for metallurgy high temperature rotary kiln material processing requirement according to claim 1, it is characterized in that, described technical parameter is, pulverized coal particle size≤0.15mm, wind: secondary wind=1: 2～4, coal-air ratio 5500～6500 standard cubic meters/ton coal, 0.30～0.35 ton of/ton material of coal consumption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810073760XA CN101349432A (en) | 2008-08-27 | 2008-08-27 | Pulverized coal burning method suitable for metallurgy high temperature rotary kiln material processing requirement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810073760XA CN101349432A (en) | 2008-08-27 | 2008-08-27 | Pulverized coal burning method suitable for metallurgy high temperature rotary kiln material processing requirement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101349432A true CN101349432A (en) | 2009-01-21 |
Family
ID=40268317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810073760XA Pending CN101349432A (en) | 2008-08-27 | 2008-08-27 | Pulverized coal burning method suitable for metallurgy high temperature rotary kiln material processing requirement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101349432A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110762549A (en) * | 2019-10-30 | 2020-02-07 | 徐州宝美工程机械有限公司 | Broken system of adding of metallurgical coal high-efficient burning |
-
2008
- 2008-08-27 CN CNA200810073760XA patent/CN101349432A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110762549A (en) * | 2019-10-30 | 2020-02-07 | 徐州宝美工程机械有限公司 | Broken system of adding of metallurgical coal high-efficient burning |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104131122A (en) | High-temperature gas injection-based iron-making technology | |
| CN104379770B (en) | Method for operating blast furnace | |
| CN106276901A (en) | A kind of oxygen full-boiled process produces carbide and the method and system of CO gas | |
| CN105823037A (en) | Biomass particle burner with vane drum type furnace bridge | |
| CN101195522A (en) | Method for calcination of chamotte in rotary cement kiln with coal gas as fuel | |
| CN108611458B (en) | Method for treating solid waste by rotary hearth furnace | |
| CN103194557A (en) | Novel gas fusing and melting furnace | |
| CN101349432A (en) | Pulverized coal burning method suitable for metallurgy high temperature rotary kiln material processing requirement | |
| CN100582203C (en) | Fire coal additive | |
| CN102853680B (en) | Secondary combustion equipment for directly reducing in grate kiln | |
| CN100596327C (en) | Discharge reducing, consumption lowering, smoke prevention and dust control combined fire coal tunnel cellar stove | |
| CN203549793U (en) | Combined type chain grate furnace with pulverized coal burner | |
| CN102588953B (en) | Self-circulation type pulverized coal furnace device | |
| CN202501450U (en) | Self-circulation pulverized coal furnace device | |
| CN109179468A (en) | The raw materials for production and its production technology of ash production calcium oxide are purified using calcium carbide furnace gas | |
| CN101748234B (en) | Continuous steel-making method of short process with suspension pre-reduction | |
| CN101367536A (en) | Method and decomposition stove for preparing lime in suspended state with wood coal as fuel | |
| CN202902320U (en) | Compound combustion type chain-grate boiler | |
| CN201440032U (en) | Sintering apparatus | |
| CN111102564A (en) | Clean power generation method for mixed-burning coal slime based on bed temperature and bed pressure control | |
| CN111102566A (en) | Clean power generation method by blending and burning coal slime in large circulating fluidized bed boiler | |
| CN206142837U (en) | Production system of carbide with adjustable pyrolysis oven | |
| CN111102565A (en) | Method for controlling emission of pollutants generated by mixed combustion of coal slime | |
| CN111102563A (en) | Clean power generation method by blending and burning coal slime based on low-position coal slime feeding mode | |
| CN100516648C (en) | Molded coal and gas mixed burning method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090121 |