CN105000812A - Calcite calcining method and equipment - Google Patents
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- 238000001354 calcination Methods 0.000 title claims abstract description 40
- 229910021532 Calcite Inorganic materials 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 26
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 82
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 42
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 39
- 239000011575 calcium Substances 0.000 claims abstract description 35
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 33
- 239000000292 calcium oxide Substances 0.000 claims abstract description 29
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical class [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000006722 reduction reaction Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 7
- 238000005336 cracking Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 230000009467 reduction Effects 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 235000011089 carbon dioxide Nutrition 0.000 claims abstract description 4
- 238000009833 condensation Methods 0.000 claims abstract description 4
- 230000005494 condensation Effects 0.000 claims abstract description 4
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000011449 brick Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- 238000002309 gasification Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims 2
- 230000008020 evaporation Effects 0.000 claims 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 230000006837 decompression Effects 0.000 claims 1
- 239000006185 dispersion Substances 0.000 claims 1
- 238000004821 distillation Methods 0.000 claims 1
- 238000011049 filling Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 235000012255 calcium oxide Nutrition 0.000 abstract description 24
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 5
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 5
- 239000004571 lime Substances 0.000 abstract description 5
- 229910004762 CaSiO Inorganic materials 0.000 abstract description 3
- 239000000378 calcium silicate Substances 0.000 abstract description 3
- 229910052918 calcium silicate Inorganic materials 0.000 abstract description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000859 sublimation Methods 0.000 abstract description 3
- 230000008022 sublimation Effects 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 22
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 7
- 230000008901 benefit Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 101100399296 Mus musculus Lime1 gene Proteins 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- -1 56.03% Inorganic materials 0.000 description 1
- 239000004484 Briquette Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
技术领域 technical field
本发明属于固体二氧化碳和金属钙的制备方法，尤其涉及以方解石为原料煅烧方法及设备，属于化学设备及其化合物制备领域。 The invention belongs to a preparation method of solid carbon dioxide and metallic calcium, in particular to a method and equipment for calcining calcite as a raw material, and belongs to the field of chemical equipment and its compound preparation.
背景技术 Background technique
目前热分解生产方解石 ( 或石灰石 )的方法有土窑煅烧、工业炉煅烧两大类。 第一类比较落后不再赘述。 第二类工业炉煅烧又细分为燃气 (煤粉 +煤气 ) 煅烧和工业电炉煅烧，是近年普遍采用的方法。其两种工艺上都是生产氧化钙 CaO，没有附带产品产出，虽可大型生产，但缺点是产品单一，产品污染多，空气污染大、石灰活性度不高。工业电炉煅烧单一生产氧化钙 CaO 成本高。 At present, there are two types of methods for producing calcite (or limestone) by pyrolysis: earth kiln calcination and industrial furnace calcination. The first category is relatively backward and will not be described in detail. The second type of industrial furnace calcination is subdivided into gas (coal + gas) calcination and industrial electric furnace calcination, which is a method commonly used in recent years. The two processes produce calcium oxide CaO, and there is no accompanying product output. Although it can be produced on a large scale, the disadvantages are that the product is single, the product is polluted, the air pollution is large, and the lime activity is not high. The single production of calcium oxide CaO by industrial electric furnace calcination is costly.
而目前金属钙的制备方法是：第一步：将大理石（CaCO3）煅烧，俗称煅白，制成生石灰（CaO）； 第二步：将生石灰（CaO）快速与铝粉（Al）混合，用压球机压制成长度为4cm左右的扁球； 第三步：将扁球放入1200度高温的还原罐中，然后抽真空； 第四步：铝粉与生石灰在真空高温条件下发生置换反应，生成氧化铝和金属钙蒸汽； 第五步：金属钙蒸汽在还原罐的水冷段凝结，形成金属钙结晶。 第六步：金属钙结晶冷却后就可以加工成所需规格的金属钙制品了，如金属钙粒、金属钙粉。 The current preparation method of metallic calcium is: first step: calcining marble (CaCO 3 ), commonly known as calcined white, to make quicklime (CaO); second step: quickly mixing quicklime (CaO) with aluminum powder (Al), Use a briquette machine to press into flat balls with a length of about 4cm; Step 3: Put the flat balls into a reduction tank at a high temperature of 1200 degrees, and then vacuumize; Step 4: Aluminum powder and quicklime undergo a displacement reaction under vacuum and high temperature conditions, Generate alumina and metal calcium vapor; Step 5: Metal calcium vapor condenses in the water cooling section of the reduction tank to form metal calcium crystals. Step 6: After the calcium metal crystallizes and cools, it can be processed into calcium metal products of required specifications, such as calcium metal particles and calcium metal powder.
固体二氧化碳是干冰，在常温和6079.8千帕压力下，把二氧化碳冷凝成无色的液体，再在低压下迅速蒸发，便凝结成一块块压紧的冰雪状固体物质，其温度是零下78.5℃。 Solid carbon dioxide is dry ice. At normal temperature and 6079.8 kPa pressure, carbon dioxide is condensed into a colorless liquid, and then evaporates rapidly under low pressure, and then condenses into pieces of compacted ice and snow-like solid substances. The temperature is minus 78.5°C.
再者，现有技术中生产二氧化碳和金属钙的方法，如中和反应化学方法萃取二氧化碳技术：开釆矿石→粗碎→细碎→磨粉→加盐酸中和→收集二氧化碳气体，化学反应式如下：CaCO3+2HCl====CaCl2+CO2↑+H2O；分解反应化学方法制取金属钙, 在催化剂的条件下CaCe2分解得到金属钙，化学反应式如下： CaCl2====Ca＋Cl2↑；焙烧法氧化钙制法：CaCO3和煤在焙烧的条件下，得到CaO和CO2，化学反应式如下： CaCO3＋煤=====CaO＋CO2↑。 Furthermore, the method for producing carbon dioxide and metal calcium in the prior art, such as the neutralization reaction chemical method to extract carbon dioxide technology: mining ore→coarse crushing→fine crushing→milling→adding hydrochloric acid to neutralize→collecting carbon dioxide gas, the chemical reaction formula is as follows : CaCO 3 +2HCl====CaCl 2 +CO 2 ↑+H 2 O; Decomposition reaction chemical method to prepare metallic calcium, CaCe 2 is decomposed under the condition of catalyst to obtain metallic calcium, the chemical reaction formula is as follows: CaCl 2 == ==Ca+Cl 2 ↑; Roasting method Calcium oxide production method: CaCO 3 and coal are roasted to obtain CaO and CO 2 , the chemical reaction formula is as follows: CaCO 3 + coal =====CaO+CO 2 ↑.
在采用化学反应方法制取二氧化碳和金属钙时应用三强酸中的盐酸，有极度腐蚀性，并在制取金属钙过程中释放出氯气，氯气带毒性，若因外泄会易使人中毒，伤人体健康，有安全稳患。 Hydrochloric acid among the three strong acids is used in the production of carbon dioxide and metal calcium by chemical reaction method, which is extremely corrosive, and chlorine gas is released during the production of metal calcium. Chlorine gas is toxic, and if leaked, it will easily poison people. Injury to human health, there is a safety hazard.
广西很多市县属于喀斯特地貌的石山地区，富含碳酸钙矿的方解石、石灰石和白云石分布十分普遍，初步统计在各县分，于地面裸露的该资源总量多达77835亿吨以上，尤其处于与云南、贵州交界山中之方解石，经冶金部门检测其化学含量高达98.89%，足可开采百多年以上，是广西较大的矿产资源之一。 Many cities and counties in Guangxi belong to the rocky mountain area with karst landforms, and the distribution of calcite, limestone and dolomite rich in calcium carbonate ore is very common. According to preliminary statistics, the total amount of this resource exposed on the ground in each county is more than 7,783.5 billion tons, especially The calcite located in the mountains bordering Yunnan and Guizhou has a chemical content as high as 98.89% as tested by the metallurgical department, which can be mined for more than a hundred years. It is one of the largest mineral resources in Guangxi.
方解石是碳酸钙矿的一个品种，也是天然碳酸钙矿中最常见的。其主要成分由Ca（钙）、C（碳）、O（氧）、三种元素构成，化学方程式为：CaCO3，分子量100.09，组成与含量：CaO、56.03%，CO2、43.9%，硬度：3.0，比重：2.6～2.8，不含其他杂质元素，当其加温于：819～832摄氏度时即能分解出二氧化碳气体和氧化钙。因此为达萃取出二氧化碳气体和氧化钙，最终用物理方法制备出固体二氧化碳、活性金属钙，有得天独厚优势。 Calcite is a variety of calcium carbonate ore, and it is also the most common natural calcium carbonate ore. Its main components are composed of three elements: Ca (calcium), C (carbon), O (oxygen), chemical formula: CaCO 3 , molecular weight 100.09, composition and content: CaO, 56.03%, CO 2 , 43.9%, hardness : 3.0, specific gravity: 2.6 ~ 2.8, does not contain other impurity elements, when it is heated at: 819 ~ 832 degrees Celsius, it can decompose carbon dioxide gas and calcium oxide. Therefore, in order to extract carbon dioxide gas and calcium oxide, and finally prepare solid carbon dioxide and active metal calcium by physical methods, it has unique advantages.
发明内容 Contents of the invention
传统化学反应方法的工业化生产过程存在连续性局限，在制取金属钙过程中释放出氯气，氯气带毒性，若因外泄会易使人中毒，伤人体健康，存在安全稳患。用土窑煅烧和工业电炉煅烧两种工艺都是生产氧化钙，产品单一，产品污染多，空气污染大、石灰活性度不高，成本高。 The industrial production process of the traditional chemical reaction method has continuity limitations. During the production of calcium metal, chlorine gas is released. Chlorine gas is toxic. Earth kiln calcination and industrial electric furnace calcination both produce calcium oxide, the product is single, the product is more polluted, the air pollution is large, the activity of lime is not high, and the cost is high.
为了便于工业化生产过程连续性，利于自动化控制作业的实施，克服现有生产技术不足之处，本发明提供方解石煅烧方法及设备，釆用电阻加热管与远红外线加热板构成的煅烧炉，以方解石为原料，用焙烧物理方法提取二氧化碳气体和氧化钙的前期产品，然后深加工获取固体二氧化碳、活性金属钙，以达到缩短生产时程，提高生产率，提高产品质量，降低环境污染，降低生产成本，消除安全隐患，最终达到增加经济利益，提高社会效益目的。 In order to facilitate the continuity of the industrial production process, facilitate the implementation of automatic control operations, and overcome the shortcomings of the existing production technology, the present invention provides a calcite calcining method and equipment, using a calcite furnace composed of a resistance heating tube and a far-infrared heating plate. As raw materials, carbon dioxide gas and calcium oxide pre-products are extracted by roasting physical methods, and then solid carbon dioxide and active metal calcium are obtained through deep processing to shorten production time, increase productivity, improve product quality, reduce environmental pollution, reduce production costs, and eliminate Potential safety hazards, and ultimately achieve the purpose of increasing economic benefits and improving social benefits.
本发明的技术方案是： Technical scheme of the present invention is:
方解石煅烧方法，是以方解石为原料，经电阻加热管、远红外加热板合成的真空特制密封煅烧炉焙烧裂解升华出二氧化碳气体及活性氧化钙前期产品，二氧化碳气体再由真空泵吸出从管道输送至配套的全自动固体二氧化碳制造装置内，经强压力、冷凝，转化为无色的液体，再减压迅速蒸发，膨胀而成固体二氧化碳成品；而将活性氧化钙成品，以氧化钙粉与硅铁粉按比例3：1混合均匀，导入真空蒸馏炉内，进行真空热还原反应，经还原、置换、升华后气化，释放出钙蒸气，收集钙蒸气冷却即可获取金属钙固体和硅酸钙（CaSiO3）成品。 The calcite calcination method uses calcite as the raw material, and is roasted and cracked in a vacuum special sealed calcination furnace synthesized by resistance heating tubes and far-infrared heating plates to produce carbon dioxide gas and activated calcium oxide early products. The carbon dioxide gas is sucked out by a vacuum pump and transported from the pipeline to the supporting In the fully automatic solid carbon dioxide manufacturing device, it is transformed into a colorless liquid by strong pressure and condensation, and then evaporates rapidly under reduced pressure, and expands into a solid carbon dioxide product; and the activated calcium oxide product is made of calcium oxide powder and ferrosilicon powder Mix evenly in a ratio of 3:1, import it into a vacuum distillation furnace, and carry out a vacuum thermal reduction reaction. After reduction, replacement, sublimation, and gasification, calcium vapor is released, and the calcium vapor is collected and cooled to obtain metallic calcium solids and calcium silicate ( CaSiO 3 ) finished product.
上述方解石煅烧温度为800～900℃。 The calcite calcining temperature is 800-900°C.
上述经煅烧炉焙烧裂解升华出的二氧化碳气体在全自动固体二氧化碳合成设备5498～6250 KPa压力下，将二氧化碳气体冷凝成无色的液态二氧化碳，再在低压下迅速膨胀、蒸发而生成固体二氧化碳成品。 The above-mentioned carbon dioxide gas sublimated by roasting and cracking in the calcination furnace is condensed into colorless liquid carbon dioxide under the pressure of 5498-6250 KPa in the automatic solid carbon dioxide synthesis equipment, and then rapidly expands and evaporates under low pressure to produce solid carbon dioxide products.
上述氧化钙与硅铁粉混合进行真空热还原反应的条件是温度1400-1600℃，压力为10 Pa。 The conditions for the above calcium oxide and ferrosilicon powder to be mixed for vacuum thermal reduction reaction are temperature 1400-1600°C and pressure 10 Pa.
方解石煅烧方法所采用的设备煅烧炉，是一种将方解石煅烧升华出CO2气体及活性氧化钙的设备，其特征在于：包括炉体、出料口3、进料口6和出气口4，炉体旁设有贮料罐1；所述的炉体用耐温钢铁材料焊成一个长方型全封闭整体，炉体下半部呈长方型，上半部焊接为梯形气室10，留有n个排列出气口4，下半部炉内周边粘贴有耐火砖9，炉体内部还设有电阻加热管及远红外加热板件12，提供方解石裂解时的热能；凸轮振动部件8安装在耐温钢板11的底部，使粉料以流动状态沿着斜面分散边受热煅烧；进料口6安装有进料活门7，出料口3安装有出料活门2；分解后的CO2从出气口4接总管道5。 The equipment calcining furnace used in the calcite calcining method is a kind of equipment for sublimating calcite to produce CO gas and activated calcium oxide. It is characterized in that it includes a furnace body, a material outlet 3, a material inlet 6 and a gas outlet 4, A storage tank 1 is arranged next to the furnace body; the furnace body is welded into a rectangular fully enclosed whole with temperature-resistant steel materials, the lower half of the furnace body is rectangular, and the upper half is welded into a trapezoidal air chamber 10. There are n arranged gas outlets 4, refractory bricks 9 are pasted around the lower half of the furnace, and a resistance heating tube and a far-infrared heating plate 12 are also provided inside the furnace body to provide heat energy for calcite cracking; the cam vibrating part 8 is installed At the bottom of the heat-resistant steel plate 11, the powder is heated and calcined along the inclined surface in a flowing state; the feed valve 7 is installed at the feed port 6, and the discharge valve 2 is installed at the discharge port 3; the decomposed CO from The air outlet 4 is connected to the main pipeline 5.
所述的梯形气室10，留有n个排列出气口4, 其中，n > 2。 Described trapezoidal air chamber 10, leaves n to arrange gas outlet 4, wherein, n > 2.
与现有技术相比，本发明的优点是： Compared with prior art, the advantage of the present invention is:
1、本发明以方解石为原料，经电阻加热管、远红外加热板合成的真空特制密封煅烧炉焙烧裂解出二氧化碳气体及活性氧化钙前期产品，然后深加工获取固体二氧化碳及活性金属钙，解决了土法煅烧石灰受煤、燃料等炉气污染的问题，并且方解石在真空特制密封煅烧炉中分解具有分解速度快、煅烧温度低、时间短、能耗低、热损小、石灰白度高、活性度高、反应性强的优点。 1. The present invention uses calcite as a raw material, roasts and cracks carbon dioxide gas and active calcium oxide pre-products in a vacuum special sealed calciner synthesized by resistance heating tubes and far-infrared heating plates, and then obtains solid carbon dioxide and active calcium metal through deep processing to solve the problem of soil The calcined lime is polluted by coal, fuel and other furnace gases, and the decomposition of calcite in a special vacuum sealed calcination furnace has the advantages of fast decomposition speed, low calcination temperature, short time, low energy consumption, small heat loss, high lime whiteness, and high activity. The advantages of high precision and strong reactivity.
2、本发明克服了传统化学反应方法的工业化生产过程存在连续性局限，且在制取金属钙过程中释放出氯气，氯气带毒性，若因外泄会易使人中毒，伤人体健康，存在安全稳患的缺点。 2. The present invention overcomes the continuity limitation of the industrialized production process of the traditional chemical reaction method, and releases chlorine gas during the process of preparing metallic calcium. The chlorine gas is toxic. If it leaks out, it will easily poison people and harm human health. The disadvantages of safety and security.
3、本发明的真空特制密封煅烧炉采用电阻加热管、远红外加热板合成，并以其作为煅烧炉的热源，具有辐射效果好，安全可靠，节能显著，安装操作简便等优点。 3. The vacuum special sealed calciner of the present invention is synthesized by a resistance heating tube and a far-infrared heating plate, and is used as a heat source of the calciner. It has the advantages of good radiation effect, safety and reliability, significant energy saving, and easy installation and operation.
4、本发明的工艺过程中不产生氯气，不产生三废排放，对人体无损害，对环境无汚染，操作安全可靠。 4. In the technological process of the present invention, no chlorine gas is generated, no three wastes are discharged, no harm is done to the human body, no pollution to the environment, and the operation is safe and reliable.
5、本发明的煅烧炉炉内周边用耐火砖粘贴起保温、隔热作用，并防止钢件体被腐蚀。煅烧炉炉中近底部设置一块两边带挡料板导料的耐温钢板，挡料板能防止下料漏失而睹塞正常生产工作的耐温钢板，耐温钢板以斜度安装，耐温钢板底面并安置有凸轮振动部件，使粉料以流动状态沿着斜面分散边受热煅烧、边由上而下缓流向炉外输出注入贮料罐。 5. The inner periphery of the calciner of the present invention is pasted with refractory bricks for heat preservation and heat insulation, and prevents the steel body from being corroded. Near the bottom of the calciner, there is a heat-resistant steel plate with a material guide on both sides. The material retainer can prevent the material from being lost and plug the heat-resistant steel plate in normal production. The temperature-resistant steel plate is installed with an inclination. The bottom surface is also equipped with a cam vibrating part, so that the powder is scattered along the inclined surface in a flowing state, while being heated and calcined, while slowly flowing from top to bottom to the outside of the furnace, and then poured into the storage tank.
附图说明 Description of drawings
图1 煅烧炉的立体示意图。 Figure 1. Stereoscopic schematic diagram of the calciner.
图2 煅烧炉的剖图 。 Figure 2 Sectional view of the calciner.
图中的名称及序号为： The names and serial numbers in the figure are:
贮料罐1、出料活门2、 煅烧炉的出料口3、出气口4、 总管道5、进料口6 、进料活门7、凸轮振动部件8、耐火砖9、梯形气室10、耐温钢板11、电阻加热管及远红外加热板件12。 Storage tank 1, discharge valve 2, discharge port 3 of calciner, gas outlet 4, main pipeline 5, feed port 6, feed valve 7, cam vibration part 8, refractory brick 9, trapezoidal air chamber 10, A temperature-resistant steel plate 11, a resistance heating tube and a far-infrared heating plate 12.
具体实施方式 Detailed ways
以下结合实施例对本发明做进一步说明，但本发明的保护范围不局限于实施例表示的范围。 The present invention will be further described below in conjunction with the examples, but the protection scope of the present invention is not limited to the scope indicated by the examples.
实施例中所用的煅烧炉为电阻加热管、远红外加热板合成的真空特制密封煅烧炉。 The calciner used in the embodiment is a vacuum special sealed calciner composed of a resistance heating tube and a far-infrared heating plate.
实施例1 Example 1
方解石煅烧方法所采用的设备煅烧炉，是一种将方解石煅烧升华出CO2气体及活性氧化钙的设备，其特征在于：包括炉体、出料口3、进料口6和出气口4，炉体旁设有贮料罐1；所述的炉体用耐温钢铁材料焊成一个长方型全封闭整体，炉体下半部呈长方型，上半部焊接为梯形气室10，留有n个排列出气口4，下半部炉内周边粘贴有耐火砖9，炉体内部还设有电阻加热管及远红外加热板件12，提供方解石裂解时的热能；凸轮振动部件8安装在耐温钢板11的底部，使粉料以流动状态沿着斜面分散边受热煅烧；进料口6安装有进料活门7，出料口3安装有出料活门2；分解后的CO2从出气口4接总管道5。 The equipment calcining furnace used in the calcite calcining method is a kind of equipment for sublimating calcite to produce CO gas and activated calcium oxide. It is characterized in that it includes a furnace body, a material outlet 3, a material inlet 6 and a gas outlet 4, A storage tank 1 is arranged next to the furnace body; the furnace body is welded into a rectangular fully enclosed whole with temperature-resistant steel materials, the lower half of the furnace body is rectangular, and the upper half is welded into a trapezoidal air chamber 10. There are n arranged gas outlets 4, refractory bricks 9 are pasted around the lower half of the furnace, and a resistance heating tube and a far-infrared heating plate 12 are also provided inside the furnace body to provide heat energy for calcite cracking; the cam vibrating part 8 is installed At the bottom of the heat-resistant steel plate 11, the powder is heated and calcined along the inclined surface in a flowing state; the feed valve 7 is installed at the feed port 6, and the discharge valve 2 is installed at the discharge port 3; the decomposed CO from The air outlet 4 is connected to the main pipeline 5.
所述的梯形气室10，留有n个排列出气口4, 其中，n 为4。 The trapezoidal air chamber 10 leaves n air outlets 4 arranged, wherein n is 4.
方解石煅烧方法，是以方解石为原料，经电阻加热管、远红外加热板合成的真空特制密封煅烧炉焙烧裂解升华出二氧化碳气体及活性氧化钙前期产品，二氧化碳气体再由真空泵吸出从管道输送至配套的全自动固体二氧化碳制造装置内，经强压力、冷凝，转化为无色的液体，再减压迅速蒸发，膨胀而成固体二氧化碳成品；而将活性氧化钙成品，以氧化钙粉与硅铁粉按比例3：1混合均匀，导入真空蒸馏炉内，进行真空热还原反应，经还原、置换、升华后气化，释放出钙蒸汽，收集钙蒸气冷却即可获取金属钙固体和硅酸钙（CaSiO3）成品。 The calcite calcination method uses calcite as the raw material, and is roasted and cracked in a vacuum special sealed calcination furnace synthesized by resistance heating tubes and far-infrared heating plates to produce carbon dioxide gas and activated calcium oxide early products. The carbon dioxide gas is sucked out by a vacuum pump and transported from the pipeline to the supporting In the fully automatic solid carbon dioxide manufacturing device, it is transformed into a colorless liquid by strong pressure and condensation, and then evaporates rapidly under reduced pressure, and expands into a solid carbon dioxide product; and the activated calcium oxide product is made of calcium oxide powder and ferrosilicon powder Mix evenly in a ratio of 3:1, import it into a vacuum distillation furnace, and carry out a vacuum thermal reduction reaction. After reduction, replacement, sublimation, and gasification, calcium vapor is released, and the calcium vapor is collected and cooled to obtain metallic calcium solids and calcium silicate ( CaSiO 3 ) finished product.
上述方解石煅烧温度为800～900℃。 The calcite calcining temperature is 800-900°C.
上述经煅烧炉焙烧裂解升华出的二氧化碳气体在全自动固体二氧化碳合成设备5498～6250 KPa压力下，将二氧化碳气体冷凝成无色的液态二氧化碳，再在低压下迅速膨胀、蒸发而生成固体二氧化碳成品。 The above-mentioned carbon dioxide gas sublimated by roasting and cracking in the calcination furnace is condensed into colorless liquid carbon dioxide under the pressure of 5498-6250 KPa in the automatic solid carbon dioxide synthesis equipment, and then rapidly expands and evaporates under low pressure to produce solid carbon dioxide products.
上述氧化钙与硅铁粉混合进行真空热还原反应的条件是温度1400-1600℃，压力为10 Pa。 The conditions for the above calcium oxide and ferrosilicon powder to be mixed for vacuum thermal reduction reaction are temperature 1400-1600°C and pressure 10 Pa.
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| 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 | An active lime calcining system |
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