CN105000812A - Calcite calcination method and equipment - Google Patents
Calcite calcination method and equipment Download PDFInfo
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- CN105000812A CN105000812A CN201510448025.2A CN201510448025A CN105000812A CN 105000812 A CN105000812 A CN 105000812A CN 201510448025 A CN201510448025 A CN 201510448025A CN 105000812 A CN105000812 A CN 105000812A
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- calcite
- carbon dioxide
- calcium
- gas
- calcining
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention discloses a calcite calcination method and equipment. According to the calcite calcination method, the calcite is used as raw material, the calcite is calcinated by a special vacuum sealed calcinator, CO2 gas and active calcium oxide are sublimated out, the CO2 gas is further aspirated out through a vacuum pump and is conveyed to a matched full-automatic manufacturing device for solid carbon dioxide through a pipeline, the CO2 gas is transformed into colorless liquid through strong pressure and condensation, then decompression is conducted, the CO2 gas evaporates quickly, and the solid carbon dioxide finished product is formed through the expansion of the CO2 gas. The active calcium oxide and ferrosilicon powders are mixed uniformly according to a weight proportion of 3:1, then the mixture is guided into a vacuum distillation furnace to conduct vacuum thermal reductive reaction, the mixture is vaporized through reduction, replacement and sublimation, calcium vapor is released out, the calcium vapor is collected and cooled, and calcium metal solid body and calcium silicate (CaSiO3) finished product are obtained. The calcite calcination method and equipment have the advantages that the problem that lime calcination through a local method is polluted by furnace gas of coal and fuel and the like is solved, the CO2 is recycled effectively, dry ice product is manufactured, the waste is turned into wealth, the quick lime is further made into the calcium metal, and the additional output value of the product is increased.
Description
Technical field
the invention belongs to the preparation method of solidified carbon dioxide and calcium metal, particularly relating to calcite is raw material method for calcinating and equipment, belongs to chemical device and field of compound preparation thereof.
Background technology
The method that calcite (or Wingdale) is produced in current thermolysis has earth kiln calcining, industrial furnace calcining two large classes.The first kind is relatively backward to be repeated no more.The calcining of Equations of The Second Kind industrial furnace is subdivided into again combustion gas (coal dust+coal gas) calcining and industrial furnace calcining, is the method in recent years generally adopted.Its two kinds of techniques are all produce calcium oxide CaO, do not attach product output, though can large-scalely produce, shortcoming is that product is single, and product contamination is many, and atmospheric pollution is large, activity of lime is not high.It is high that industrial furnace calcines single production calcium oxide CaO cost.
And the preparation method of metal current calcium is: the first step: by marble (CaCO
3) calcining, be commonly called as and forge white, make unslaked lime (CaO); Second step: unslaked lime (CaO) is mixed with aluminium powder (Al) fast, is pressed into ball press the oblate spheroid that length is about 4cm; 3rd step: reductive jar oblate spheroid being put into 1200 degree of high temperature, then vacuumizes; 4th step: aluminium powder and unslaked lime, under vacuum high-temperature condition, replacement(metathesis)reaction occurs, generates aluminum oxide and calcium metal steam; 5th step: calcium metal steam condenses in the water-cooled section of reductive jar, forms calcium metal crystallization.6th step: just can be processed into the calcium metal goods of required specification, as granules of metal Ca, metallic calcium powder after calcium metal crystallization cooling.
Solidified carbon dioxide is dry ice, under normal temperature and 6079.8 kpa pressures, carbon dioxide condensing is become colourless liquid, more under low pressure evaporates rapidly, and just condense into the ice and snow shape solid matter that one piece of block compresses, its temperature is subzero 78.5 DEG C.
Moreover, produce the method for carbonic acid gas and calcium metal in prior art, as neutralization reaction chemical process extract carbon dioxide technology: open Bian ore → coarse crushing → in small, broken bits → abrasive dust → add hydrochloric acid to neutralize → collect carbon dioxide, chemical equation is as follows: CaCO
3+ 2HCl====CaCl
2+ CO
2↑+H
2o; Decomposition reaction chemical process produces calcium metal, CaCe under the condition of catalyzer
2decompose and obtain calcium metal, chemical equation is as follows: CaCl
2====Ca+Cl
2↑; Roasting method calcium oxide method for making: CaCO
3with coal under the condition of roasting, obtain CaO and CO
2, chemical equation is as follows: CaCO
3+ coal=====CaO+CO
2↑.
Applying hydrochloric acid in three strong acid when adopting chemical reaction method to produce carbonic acid gas and calcium metal, having extremely corrodibility, and discharge chlorine, chlorine band toxicity producing in calcium metal process, if can easily make people poisoning because of leaking, hindering HUMAN HEALTH, having the steady trouble of safety.
A lot of cities and counties, Guangxi belong to the mountain areas of karst landform, be rich in the distribution of the calcite in calcium carbonate ore deposit, Wingdale and rhombspar very general, rough estimates divide in each county, more than 77,835 hundred million tons are reached in this total resources that ground is exposed, especially be in and the calcite in Yunnan, mountain, boundary, Guizhou, detecting its chemical content up to 98.89% through metallurgical department, can exploit more than more than hundred year completely, is one of larger Mineral resources in Guangxi.
Calcite is a kind in calcium carbonate ore deposit, is also modal in natural whiting ore deposit.Its main component is by Ca(calcium), C(carbon), O(oxygen), three kinds of elements form, chemical equation is: CaCO
3, molecular weight 100.09, composition and content: CaO, 56.03%, CO
2, 43.9%, hardness: 3.0, proportion: 2.6 ~ 2.8, not containing other impurity elements, when its heat in: can split the carbon dioxide off when 819 ~ 832 degrees Celsius gas and calcium oxide.Therefore extracting carbon dioxide and calcium oxide for reaching, finally preparing solidified carbon dioxide, active metal calcium with physical method, having advantage richly endowed by nature.
Summary of the invention
There is continuity limitation in the commercial process of traditional chemical reaction method, discharges chlorine, chlorine band toxicity producing in calcium metal process, if can easily make people poisoning because of leaking, hindering HUMAN HEALTH, there is the steady trouble of safety.Calcining two kinds of techniques with earth kiln calcining and industrial furnace is all produce calcium oxide, and product is single, and product contamination is many, and atmospheric pollution is large, activity of lime is not high, and cost is high.
For the ease of commercial process continuity, be beneficial to the enforcement of Automated condtrol operation, overcome existing production technology weak point, the invention provides calcite method for calcinating and equipment, Bian is heated by resistive the calcining furnace that pipe is formed with far-infrared heating plate, take calcite as raw material, the product in early stage of carbon dioxide and calcium oxide is extracted with roasting physical method, then deep processing obtains solidified carbon dioxide, active metal calcium, production time-histories is shortened to reach, boost productivity, improve the quality of products, reduce environmental pollution, reduce production cost, eliminate safe hidden trouble, finally reach increase economic interests, improve social benefit object.
Technical scheme of the present invention is:
Calcite method for calcinating, take calcite as raw material, through resistance heating tube, Far infrared heating plate synthesis vacuum special sealing calcining furnace roasting cracking distil out carbon dioxide and active calcium oxide early stage product, carbon dioxide again by vacuum pump sucking-off from Cemented filling in supporting full automatic solid carbonic acid gas manufacturing installation, through strong pressure, condensation, be converted into colourless liquid, then decompression evaporation rapidly, expand and form solidified carbon dioxide finished product; And by active calcium oxide finished product, with calcium oxide powder and ferrosilicon powder in proportion 3:1 mix, import in vacuum distillation furnace, carry out vacuum-thermal reduction reaction, gasification after reduction, displacement, distillation, discharges calcium steam, collects the cooling of calcium steam and can obtain calcium metal solid and Calucium Silicate powder (CaSiO
3) finished product.
Above-mentioned calcite calcining temperature is 800 ~ 900 DEG C.
The above-mentioned carbon dioxide distilled out through calcining furnace roasting cracking is under full automatic solid carbonic acid gas synthesis device 5498 ~ 6250 KPa pressure, carbon dioxide is condensed into colourless liquid carbon dioxide, more under low pressure undergoes rapid expansion, evaporation and generate solidified carbon dioxide finished product.
Above-mentioned calcium oxide mixes the condition of carrying out vacuum-thermal reduction reaction with ferrosilicon powder be temperature 1400-1600 DEG C, and pressure is 10 Pa.
The equipment calcining furnace that calcite method for calcinating adopts is a kind of CO that calcite calcining distilled out
2the equipment of gas and active calcium oxide, is characterized in that: comprise body of heater, discharge port 3, opening for feed 6 and air outlet 4, and body of heater is other is provided with material-storage jar 1; Described body of heater heatproof ferrous materials is welded into a rectangle Full-closed integral, body of heater Lower Half is rectangle, the first half is welded as trapezoidal air chamber 10, leave n arrangement air outlet 4, Lower Half stove inside circumference is pasted with refractory brick 9, furnace interior is also provided with resistance heating tube and far-infrared heating plate 12, and provider separates heat energy during stony fracture solution; Cam vibrating mass 8 is arranged on the bottom of heatproof steel plate 11, and powder to be heated along dispersion limit, inclined-plane calcining with flow state; Opening for feed 6 is provided with charging valve 7, and discharge port 3 is provided with material output valve 2; CO after decomposition
2total pipeline 5 is connect from air outlet 4.
Described trapezoidal air chamber 10, leaves n arrangement air outlet 4, wherein, and n > 2.
Compared with prior art, advantage of the present invention is:
1, the present invention take calcite as raw material, vacuum special sealing calcining furnace roasting cracking through resistance heating tube, Far infrared heating plate synthesis goes out carbon dioxide and active calcium oxide product in early stage, then deep processing obtains solidified carbon dioxide and active metal calcium, solve the problem that local method lime kilning pollutes by the furnace gas such as coal, fuel, and calcite decomposes in vacuum special sealing calcining furnace and has that decomposition rate is fast, calcining temperature is low, the time is short, energy consumption is low, heat waste is little, lime whiteness is high, activity degree is high, hyperergic advantage.
There is continuity limitation in the commercial process that 2, instant invention overcomes traditional chemical reaction method, and discharges chlorine, chlorine band toxicity producing in calcium metal process, if can easily make people poisoning because of leaking, hindering HUMAN HEALTH, there is the shortcoming of the steady trouble of safety.
3, the special sealing calcining furnace of vacuum of the present invention adopts the synthesis of resistance heating tube, Far infrared heating plate, and using it as the thermal source of calcining furnace, has radiation effect good, and safe and reliable, obvious energy conservation, installs the advantages such as easy and simple to handle.
4, in the process of the present invention does not produce chlorine, no "three wastes" emissions, no damage to human body, to the environment pollution-free, safe and reliable operation.
5, calcining furnace stove inside circumference refractory brick of the present invention has pasted insulation, heat-blocking action, and prevents steel part body to be corroded.In calcining furnace stove, nearly bottom arranges the heatproof steel plate of one piece of two sideband blocking material plate guide, blocking material plate can prevent blanking from missing and seeing the heatproof steel plate filling in normal production work, heatproof steel plate is installed with gradient, heatproof steel plate bottom surface is also mounted with cam vibrating mass, and powder from top to bottom to be flow slowly output injection material-storage jar outside stove with to be heated along dispersion limit, inclined-plane calcining, limit of flow state.
Accompanying drawing explanation
The schematic perspective view of Fig. 1 calcining furnace.
Fig. 2 calcining furnace cut open figure.
Title in figure and sequence number are:
The discharge port 3 of material-storage jar 1, material output valve 2, calcining furnace, air outlet 4, total pipeline 5, opening for feed 6, charging valve 7, cam vibrating mass 8, refractory brick 9, trapezoidal air chamber 10, heatproof steel plate 11, resistance heating tube and far-infrared heating plate 12.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, but protection scope of the present invention is not limited to the scope that embodiment represents.
Calcining furnace used in embodiment is the special sealing calcining furnace of vacuum of resistance heating tube, Far infrared heating plate synthesis.
Embodiment 1
The equipment calcining furnace that calcite method for calcinating adopts is a kind of CO that calcite calcining distilled out
2the equipment of gas and active calcium oxide, is characterized in that: comprise body of heater, discharge port 3, opening for feed 6 and air outlet 4, and body of heater is other is provided with material-storage jar 1; Described body of heater heatproof ferrous materials is welded into a rectangle Full-closed integral, body of heater Lower Half is rectangle, the first half is welded as trapezoidal air chamber 10, leave n arrangement air outlet 4, Lower Half stove inside circumference is pasted with refractory brick 9, furnace interior is also provided with resistance heating tube and far-infrared heating plate 12, and provider separates heat energy during stony fracture solution; Cam vibrating mass 8 is arranged on the bottom of heatproof steel plate 11, and powder to be heated along dispersion limit, inclined-plane calcining with flow state; Opening for feed 6 is provided with charging valve 7, and discharge port 3 is provided with material output valve 2; CO after decomposition
2total pipeline 5 is connect from air outlet 4.
Described trapezoidal air chamber 10, leave n arrangement air outlet 4, wherein, n is 4.
Calcite method for calcinating, take calcite as raw material, through resistance heating tube, Far infrared heating plate synthesis vacuum special sealing calcining furnace roasting cracking distil out carbon dioxide and active calcium oxide early stage product, carbon dioxide again by vacuum pump sucking-off from Cemented filling in supporting full automatic solid carbonic acid gas manufacturing installation, through strong pressure, condensation, be converted into colourless liquid, then decompression evaporation rapidly, expand and form solidified carbon dioxide finished product; And by active calcium oxide finished product, with calcium oxide powder and ferrosilicon powder in proportion 3:1 mix, import in vacuum distillation furnace, carry out vacuum-thermal reduction reaction, gasification after reduction, displacement, distillation, discharges calcium steam, collects the cooling of calcium steam and can obtain calcium metal solid and Calucium Silicate powder (CaSiO
3) finished product.
Above-mentioned calcite calcining temperature is 800 ~ 900 DEG C.
The above-mentioned carbon dioxide distilled out through calcining furnace roasting cracking is under full automatic solid carbonic acid gas synthesis device 5498 ~ 6250 KPa pressure, carbon dioxide is condensed into colourless liquid carbon dioxide, more under low pressure undergoes rapid expansion, evaporation and generate solidified carbon dioxide finished product.
Above-mentioned calcium oxide mixes the condition of carrying out vacuum-thermal reduction reaction with ferrosilicon powder be temperature 1400-1600 DEG C, and pressure is 10 Pa.
Claims (4)
1. calcite method for calcinating, it is characterized in that: take calcite as raw material, through resistance heating tube, Far infrared heating plate synthesis vacuum special sealing calcining furnace roasting cracking distil out carbon dioxide and active calcium oxide early stage product, carbon dioxide again by vacuum pump sucking-off from Cemented filling in supporting full automatic solid carbonic acid gas manufacturing installation, through strong pressure, condensation, be converted into colourless liquid, then decompression evaporation rapidly, expand and form solidified carbon dioxide finished product; And by active calcium oxide finished product, with calcium oxide powder and ferrosilicon powder by weight proportion 3:1 mix, in importing vacuum distillation furnace, carry out vacuum-thermal reduction reaction, gasification after reduction, displacement, distillation, discharge calcium steam, collect the cooling of calcium steam and can obtain calcium metal solid and Calucium Silicate powder finished product.
2. calcite method for calcinating according to claim 1, is characterized in that: described calcite calcining temperature is 800 ~ 900 DEG C; The carbon dioxide distilled out through calcining furnace roasting cracking is under full automatic solid carbonic acid gas synthesis device 5498 ~ 6250 KPa pressure, carbon dioxide is condensed into colourless liquid carbon dioxide, more under low pressure undergoes rapid expansion, evaporation and generate solidified carbon dioxide finished product; Described calcium oxide mixes the condition of carrying out vacuum-thermal reduction reaction with ferrosilicon powder be temperature 1400-1600 DEG C, and pressure is 10 Pa.
3. calcite method for calcinating according to claim 1 and 2, is characterized in that: the equipment calcining furnace that calcite method for calcinating adopts, and is a kind of CO that calcite calcining distilled out
2the equipment of gas and active calcium oxide, is characterized in that: comprise body of heater, discharge port (3), opening for feed (6) and air outlet (4), and body of heater is other is provided with material-storage jar (1); Described body of heater heatproof ferrous materials is welded into a rectangle Full-closed integral, body of heater Lower Half is rectangle, the first half is welded as trapezoidal air chamber (10), leave n arrangement air outlet (4), Lower Half stove inside circumference is pasted with refractory brick (9), furnace interior is also provided with resistance heating tube and far-infrared heating plate (12), and provider separates heat energy during stony fracture solution; Cam vibrating mass (8) is arranged on the bottom of heatproof steel plate (11), and powder to be heated along dispersion limit, inclined-plane calcining with flow state; Opening for feed (6) is provided with charging valve (7), and discharge port (3) is provided with material output valve (2); CO after decomposition
2total pipeline (5) is connect from air outlet (4).
4. calcining furnace according to claim 3, is characterized in that: described trapezoidal air chamber (10), leaves n arrangement air outlet (4), wherein, and n > 2.
Priority Applications (1)
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|---|---|---|---|
| CN201510448025.2A CN105000812A (en) | 2015-07-28 | 2015-07-28 | Calcite calcination method and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448025.2A CN105000812A (en) | 2015-07-28 | 2015-07-28 | Calcite calcination method and equipment |
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| CN105000812A true CN105000812A (en) | 2015-10-28 |
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ID=54373731
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| CN201510448025.2A Pending CN105000812A (en) | 2015-07-28 | 2015-07-28 | Calcite calcination method and equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337360A (en) * | 2017-07-26 | 2017-11-10 | 贵州省漆彩金州涂料有限公司 | A kind of novel lime calciner |
| WO2018203761A1 (en) * | 2017-05-03 | 2018-11-08 | Consultores Y Contratistas Generales Sac | Method for producing lime and cement at a low temperature and with total carbon dioxide capture |
| CN113769871A (en) * | 2021-09-15 | 2021-12-10 | 林高兴 | Active lime calcining system |
Citations (6)
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| CN87105538A (en) * | 1986-08-08 | 1988-03-23 | 克林顿·巴杰尔·派克 | Stove |
| US6442968B1 (en) * | 2001-10-30 | 2002-09-03 | Albert S. Elias | Apparatus for rapid, high volume production of solid CO2 pellets |
| CN2539946Y (en) * | 2002-04-08 | 2003-03-12 | 朱行郎 | Deep cold high efficient dry-ice machine |
| CN101285130A (en) * | 2008-05-30 | 2008-10-15 | 昆明理工大学 | Process for preparing calcium metal by reducing calcium oxide with ferrosilicium |
| CN104236252A (en) * | 2014-08-27 | 2014-12-24 | 华南理工大学 | Method and device for preparing liquid CO2 (carbon diode) by cold energy of LNG (liquefied natural gas) |
| CN104496206A (en) * | 2014-06-19 | 2015-04-08 | 谢英健 | Method for preparation of high activity lime from calcite and comprehensive application of product |
-
2015
- 2015-07-28 CN CN201510448025.2A patent/CN105000812A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105538A (en) * | 1986-08-08 | 1988-03-23 | 克林顿·巴杰尔·派克 | Stove |
| US6442968B1 (en) * | 2001-10-30 | 2002-09-03 | Albert S. Elias | Apparatus for rapid, high volume production of solid CO2 pellets |
| CN2539946Y (en) * | 2002-04-08 | 2003-03-12 | 朱行郎 | Deep cold high efficient dry-ice machine |
| CN101285130A (en) * | 2008-05-30 | 2008-10-15 | 昆明理工大学 | Process for preparing calcium metal by reducing calcium oxide with ferrosilicium |
| CN104496206A (en) * | 2014-06-19 | 2015-04-08 | 谢英健 | Method for preparation of high activity lime from calcite and comprehensive application of product |
| CN104236252A (en) * | 2014-08-27 | 2014-12-24 | 华南理工大学 | Method and device for preparing liquid CO2 (carbon diode) by cold energy of LNG (liquefied natural gas) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018203761A1 (en) * | 2017-05-03 | 2018-11-08 | Consultores Y Contratistas Generales Sac | Method for producing lime and cement at a low temperature and with total carbon dioxide capture |
| CN107337360A (en) * | 2017-07-26 | 2017-11-10 | 贵州省漆彩金州涂料有限公司 | A kind of novel lime calciner |
| CN113769871A (en) * | 2021-09-15 | 2021-12-10 | 林高兴 | Active lime calcining system |
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Application publication date: 20151028 |
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