CN110092400A - Carbide slag reduction-oxidation calcium technology is calcined using low value carbon dioxide high-temperature flue gas - Google Patents
Carbide slag reduction-oxidation calcium technology is calcined using low value carbon dioxide high-temperature flue gas Download PDFInfo
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- CN110092400A CN110092400A CN201810098470.4A CN201810098470A CN110092400A CN 110092400 A CN110092400 A CN 110092400A CN 201810098470 A CN201810098470 A CN 201810098470A CN 110092400 A CN110092400 A CN 110092400A
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- carbide slag
- reduction
- flue gas
- calcium
- temperature flue
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
- C01F11/04—Oxides or hydroxides by thermal decomposition
Abstract
The present invention relates to traditional carbide slag calcining reduction calcium oxide technologies, it is that calcining carbide slag is directly heated using hydrocarbon fuel high-temperature flue gas, since high-temperature flue gas gas concentration lwevel height causes the product content of free calcium oxide after reduction low, it can not largely circulating and recoverings be used to furnace of calcium carbide, the present invention is in tradition reduction carbide slag technology, using low value carbon dioxide high-temperature flue gas as heat source medium, the technologies such as wink technique, external-burning calcined by rotary kiln technique, compacting balling-up calcining are dodged using preheating in rotary kiln device technique or eddy flow dynamic and carry out carbide slag reduction-oxidation calcium.Stable product quality after reduction can largely put into furnace of calcium carbide reuse, realize calcium oxide-calcium carbide-carbide slag-calcium oxide-calcium carbide Mode of Circular.
Description
Technical field
It the present invention relates to traditional carbide slag calcining reduction calcium oxide technology, is directly heated using hydrocarbon fuel high-temperature flue gas
Carbide slag is calcined, since high-temperature flue gas gas concentration lwevel height causes the product content of free calcium oxide after reduction low, Wu Fa great
It measures circulating and recovering to use to furnace of calcium carbide, the present invention is in tradition reduction carbide slag technology, using low value carbon dioxide high-temperature flue gas
As heat source medium, wink technique, external-burning calcined by rotary kiln technique, compacting are dodged using preheating in rotary kiln device technique, eddy flow dynamic
The technologies such as balling-up calcining carry out carbide slag reduction-oxidation calcium.Stable product quality after reduction can largely put into furnace of calcium carbide
Calcium oxide-calcium carbide-carbide slag-calcium oxide-calcium carbide Mode of Circular is realized in reuse.
Background technique
Carbide slag is that chemical industry carbide extracts the industrial residue after acetylene gas, there is dry slag (moisture content 7%) and wet slag
Two kinds of (moisture content 35%).In China, this solid waste recycling rate is very low, and most of industrial and mining enterprises use and fill out
Bury method, this processing method will occupy a large amount of soils, while can water source osmosis pollution to landfill yard periphery, so that soil is alkalized,
Irreversible harm is caused to environment.Carbide slag main component is Ca (OH) 2(calcium hydroxide), carbide slag comprehensive process at present
It utilizes, mainly for the manufacture of portland cement；By carbide slag calcium resource calcining reduction at calcium oxide, produced mostly in predecessor State
The technology that technique uses is calcined for hydrocarbon fuel preheating in rotary kiln device, hydrocarbon fuel eddy flow dynamic dodges wink calcining etc.；Using hydrocarbon
Fuel heat source flue gas dinectly bruning contains great amount of carbon dioxide in flue gas, makes to go back that original product the efficient oxidation calcium is low, and product quality is not
Stablize, can not large scale reuse as the raw material for preparing calcium carbide.
Summary of the invention
The purpose of the present invention is take low value carbon dioxide high reduction heat source on the basis of traditional carbide slag reduction technique
Warm flue gas carries out calcining carbide slag reduction-oxidation calcium as heat source medium；Or by after dry acetylene sludge powder raw material first ball processed again into
Row calcining reduction.
The present invention is realized by following technical matters:
1. directly heating air using electric energy is made high temperature low-carbon flue gas for carbide slag reduction-oxidation calcium；
2. high temperature low-carbon flue gas, which is made, using hydrocarbon fuel indirect heating air is used for carbide slag reduction-oxidation calcium；
3. being used for carbide slag reduction-oxidation calcium using the high-temp waste gas that pneumatic steelmaking, electric furnace steel making generate；
4. high-temperature flue gas of the gas concentration lwevel lower than 10% generated using industrial waste gases such as electrolytic aluminiums is used for carbide slag oxygen reduction
Change calcium；
5, heat source is done with low value carbon dioxide high-temperature flue gas, carbide slag reduction-oxidation calcium work is calcined using preheating in rotary kiln device technique
Skill；
6, heat source is done with low value carbon dioxide high-temperature flue gas, wink is dodged using eddy flow dynamic and calcines carbide slag reduction-oxidation calcium technique；
7, with hydrocarbon fuel indirect heating air, using external-burning calcined by rotary kiln carbide slag reduction-oxidation calcium technique；
8, with Electric heating, using external-burning calcined by rotary kiln carbide slag reduction-oxidation calcium technique；
9, with hydrocarbon fuel indirect heating air, wink is dodged using eddy flow dynamic and calcines carbide slag reduction-oxidation calcium technique；
10, with Electric heating, wink is dodged using eddy flow dynamic and calcines carbide slag reduction-oxidation calcium technique；
11, by after carbide slag pressure ball, heat source directly is done with high-temperature flue gas and carries out calcining carbide slag reduction-oxidation calcium.
Detailed description of the invention (see attached drawing 1,2,3,4)
Attached drawing 1: it prepares low content carbon dioxide high-temperature flue gas and does heat source using preheater+rotary kiln carbide slag reduction-oxidation calcium work
Skill technology；
Attached drawing 2: carbide slag puts into calcined by rotary kiln reduction-oxidation calcium technology after suppressing balling-up preheating；
Attached drawing 3: external-burning rotary kiln carbide slag calcining reduction calcium oxide technology is used；
Attached drawing 4: it prepares low content carbon dioxide high-temperature flue gas and does heat source using eddy flow dynamic sudden strain of a muscle wink calcining carbide slag reduction-oxidation
Calcium technology, (" technique one " prepare low content carbon dioxide high-temperature flue gas with calcining, " technique two " will dynamic dodge wink furnace change
Calcining carbide slag reduction-oxidation calcium is carried out into type).
Specific embodiment
Preferred embodiments of the invention are illustrated below in conjunction with attached drawing, it should be understood that preferred embodiments described herein
Only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention；
One, it prepares low content carbon dioxide high-temperature flue gas and does heat source using preheater+rotary kiln carbide slag reduction-oxidation calcium technique
Technology includes that following step is played:
(1) thermal technology is turned using high-power electricity and prepares low content carbon dioxide high-temperature flue gas；
(2) low content carbon dioxide high temperature cigarette is obtained after handling using high temperature waste gas purifications such as pneumatic steelmaking, electric furnace steel making, electrolytic aluminiums
Gas；
(3) low content carbon dioxide high-temperature flue gas is prepared with hydrocarbon fuel indirect heating pure air；
(4) by the low content carbon dioxide high-temperature flue gas of preparation replace traditional high-temperature flue gas by rotary kiln, exterior decomposing furnace of kiln,
Preheater reacts with material, and material calcining is reduced into calcium oxide；
Two, investment calcined by rotary kiln reduction-oxidation calcium technology includes that following step is played after carbide slag compacting balling-up preheating:
(1) balling-up is suppressed after wet carbide slag being dried to moisture content lower than 5% in advance；
(2) the carbide slag sphere after balling-up passes through Special pre-heating device, is fully warmed-up sphere；
(3) high-temperature calcination will be carried out in the material investment rotary kiln after preheating；
(4) high-temperature flue gas source is directly burnt calcining with two kinds, the first hydrocarbon fuel, in order to improve reduction product quality and surely
It is qualitative, it low content carbon dioxide high-temperature flue gas can be used does heat source and calcined, material resolves into calcium oxide in rotary kiln；
Three, carrying out calcining carbide slag reduction-oxidation calcium technology using external-burning rotary kiln includes that following step is played:
(1), using external-burning rotary kiln high-temp waste gas dry powder carbide slag is subjected to preheating or will suppress the carbide slag ball of balling-up into
Row preheating；
(2), by after preheating dry powder carbide slag or carbide slag ball direct plunge into external-burning rotary kiln carry out calcining reduction calcium oxide；
Four, it prepares low content carbon dioxide high-temperature flue gas and does heat source, wink is dodged using eddy flow dynamic and calcines carbide powder reduction-oxidation
Calcium technology includes that following step is played:
(1), thermal technology is turned using high-power electricity and prepares low content carbon dioxide high-temperature flue gas；
(2), low content carbon dioxide high temperature is obtained after handling using the high temperature waste gas purification such as pneumatic steelmaking, electric furnace steel making, electrolytic aluminium
Flue gas；
(3), by the low content carbon dioxide high-temperature flue gas of preparation replace traditional high-temperature flue gas by eddy flow dynamic dodge wink furnace into
Row material decomposes, and material calcining is reduced into calcium oxide；
(4), traditional eddy flow dynamic is dodged into the design that undergoes technological transformation in wink, increases high temperature resistant liner in furnace, hydrocarbon fuel is high
Warm flue gas flows indirect heating liner outside the tank, and dry powder carbide slag enters the cleaning of furnace internal-lining and preheating after waste gas residual heat
Air mixing carries out dodging wink calcining reduction in liner.
Claims (11)
1. directly heating air using electric energy is made high temperature low-carbon flue gas for carbide slag reduction-oxidation calcium.
2. high temperature low-carbon flue gas, which is made, using hydrocarbon fuel indirect heating air is used for carbide slag reduction-oxidation calcium.
3. being used for carbide slag reduction-oxidation calcium using the high-temp waste gas that pneumatic steelmaking, electric furnace steel making generate.
4. high-temperature flue gas of the gas concentration lwevel lower than 10% generated using industrial waste gases such as electrolytic aluminiums is used for carbide slag oxygen reduction
Change calcium.
5. doing heat source with low value carbon dioxide high-temperature flue gas, carbide slag reduction-oxidation calcium work is calcined using preheating in rotary kiln device technique
Skill.
6. doing heat source with low value carbon dioxide high-temperature flue gas, wink is dodged using eddy flow dynamic and calcines carbide slag reduction-oxidation calcium technique.
7. hydrocarbon fuel indirect heating is used, using external-burning calcined by rotary kiln carbide slag reduction-oxidation calcium technique.
8. Electric heating is used, using external-burning calcined by rotary kiln carbide slag reduction-oxidation calcium technique.
9. using hydrocarbon fuel indirect heating air, wink is dodged using eddy flow dynamic and calcines carbide slag reduction-oxidation calcium technique.
10. using Electric heating, wink is dodged using eddy flow dynamic and calcines carbide slag reduction-oxidation calcium technique.
11. doing heat source after carbide slag pressure ball using low value carbon dioxide high-temperature flue gas or hydrocarbon fuel high-temperature flue gas and being forged
Baking carbide residue reduction-oxidation calcium technology.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111285388A (en) * | 2020-03-24 | 2020-06-16 | 绵阳市安州区银源科技有限公司 | Method for preparing high-purity calcium oxide by using carbide slag |
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| CN103833238A (en) * | 2012-11-22 | 2014-06-04 | 刘山海 | Method using calcium carbide slag to produce high activity lime |
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| CN101514027A (en) * | 2009-03-09 | 2009-08-26 | 王红 | Manufacturing technique for preparing calcium oxide by using acetylene sludge |
| CN101967001A (en) * | 2010-09-26 | 2011-02-09 | 河北科技大学 | Method for producing calcium carbonate by using calcium carbide slag and low concentration carbon dioxide-containing waste gas as raw materials |
| CN103833238A (en) * | 2012-11-22 | 2014-06-04 | 刘山海 | Method using calcium carbide slag to produce high activity lime |
| CN103922625A (en) * | 2014-04-16 | 2014-07-16 | 南京凯盛国际工程有限公司 | System for drying and decomposing wet acetylene sludge and firing cement clinker by using wet acetylene sludge as calcium raw material |
| CN105948092A (en) * | 2016-05-09 | 2016-09-21 | 聂国印 | Recycling method of carbide slag in chlor-alkali industry |
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| 刘红盼等: "电石渣在不同气氛下析晶动力学研究", 《硅酸盐通报》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111285388A (en) * | 2020-03-24 | 2020-06-16 | 绵阳市安州区银源科技有限公司 | Method for preparing high-purity calcium oxide by using carbide slag |
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