CN104556184A - Method for producing industrial precipitation-type nano calcium carbonate - Google Patents
Method for producing industrial precipitation-type nano calcium carbonate Download PDFInfo
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- CN104556184A CN104556184A CN201410767763.9A CN201410767763A CN104556184A CN 104556184 A CN104556184 A CN 104556184A CN 201410767763 A CN201410767763 A CN 201410767763A CN 104556184 A CN104556184 A CN 104556184A
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Abstract
The invention discloses a method for producing industrial precipitation-type nano calcium carbonate and relates to the technical field of nano calcium carbonate. The method comprises the following steps: drying limestone, calcining the limestone in a rotary kiln, and hydrolyzing calcined calcium oxide to generate calcium hydroxide solution; introducing the recycled carbon dioxide gas, finally dehydrating and drying, thereby obtaining the nano calcium carbonate. According to the method, the carbon dioxide gas in the calcined flue gas is recycled, and the problem of environmental pollution caused by direct emission is solved; the generation speed of the calcium carbonate is controlled by regulating the flow of carbon dioxide, so that the nano calcium carbonate with narrow particle size range is prepared. Therefore, the consumption of the carbon dioxide can be reduced, and the prepared nano calcium carbonate has the characteristics of stable quality and high purity.
Description
Technical field:
The present invention relates to nano-calcium carbonate production technical field, be specifically related to a kind of production method of industrial sedimentation type nano-calcium carbonate.
Background technology:
Nano-calcium carbonate, relative to common micro calcium carbonate, has the characteristics such as small-size effect, skin effect, quantum effect, thus can produce the excellent properties that micro-calcium carbonate do not possess.Nano-calcium carbonate is the product that nanometer grade powder material drops into suitability for industrialized production the earliest, is applied to the industries such as rubber, plastics, papermaking, coating, automobile, medicine, food.
At present, there is the problems such as granularity is comparatively large, rank is wider, quality is unstable, reunion in domestic produced nano-calcium carbonate, this directly affects the application performance of nano-calcium carbonate, therefore, need badly and develop a kind of production method preparing simple, that steady quality, granularity are controlled industrial sedimentation type nano-calcium carbonate.
Summary of the invention:
Technical problem to be solved by this invention is to provide a kind of production method of reasonable in design, industrial sedimentation type nano-calcium carbonate that the feature of environmental protection is strong.
Technical problem to be solved by this invention adopts following technical scheme to realize:
A production method for industrial sedimentation type nano-calcium carbonate, comprises the steps:
(1) first lime stone is placed in drier, is then warming up to 105-110 DEG C of dry 1-2h;
(2) dried lime stone is dropped in rotary kiln, heat up after preheater preheats and calcine, again through cooler cooling after calcining terminates, when temperature is down to below 100 DEG C, the calcium oxide of generation is drawn off;
(3) flue gas discharged by rotary kiln by air-introduced machine sends into scrubbing tower, undertaken washing rear gas by water at low temperature and enter steam-water separator, isolated gas sends into the absorption tower that serotonin solution is housed, gained absorbing liquid enters regenerator subsequently and releases gas through reboiler heating, gas enters steam-water separator after the cooling of regeneration condenser, isolated gas enters desulfurizing tower, and the gas after desulfurization enters compressor, obtains carbon dioxide compression gas after three stage compression;
(4) join in reactor by the calcium oxide of preparation, then add the water of 3-4 times of weight, be warming up to 80-90 DEG C, react 30-35min at this temperature under stirring, reaction terminates rear cooling down, obtains calcium hydroxide suspension;
(5) join in autoclave by the calcium hydroxide suspension of preparation, then pass into carbon dioxide, control carbon dioxide flow is 0.1-0.2m
3/ h, reacts under room temperature, stops reaction when reaction pressure drops to 0.6MPa and keeps 1h constant, obtains white crystals body, then is placed on dry 8-12h in vacuum desiccator, finally obtain nano-calcium carbonate calcium powder after reactant liquor dehydration.
In described lime stone, the content of calcium carbonate is greater than 80%.
The granularity of described lime stone is 30-50mm.
Described calcining maximum temperature is 1100-1200 DEG C.
The purity of described nano-calcium carbonate calcium powder higher than 97%, whiteness higher than 93%, granularity is 400-500nm.
The invention has the beneficial effects as follows: the present invention carries out recycling to the carbon dioxide in the flue gas of calcining generation, avoids the problem of environmental pollution caused because directly discharging; Controlled the formation speed of calcium carbonate by regulation of carbon dioxide flow, thus prepare the narrower nano-calcium carbonate of particle size range, the consumption of carbon dioxide can not only be reduced like this, and the nano-calcium carbonate of preparation has steady quality, feature that purity is high.
Detailed description of the invention:
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.
A production method for industrial sedimentation type nano-calcium carbonate, comprises the steps:
(1) first calcium carbonate content is greater than 80%, lime stone that granularity is 30-50mm is placed in drier, be then warming up to 105-110 DEG C of dry 2h;
(2) dropped in rotary kiln by dried lime stone, heat up and calcine after preheater preheats, calcining maximum temperature is 1100-1200 DEG C, again through cooler cooling after calcining terminates, is drawn off by the calcium oxide of generation when temperature is down to below 100 DEG C;
(3) flue gas discharged by rotary kiln by air-introduced machine sends into scrubbing tower, undertaken washing rear gas by water at low temperature and enter steam-water separator, isolated gas sends into the absorption tower that serotonin solution is housed, gained absorbing liquid enters regenerator subsequently and releases gas through reboiler heating, gas enters steam-water separator after the cooling of regeneration condenser, isolated gas enters desulfurizing tower, and the gas after desulfurization enters compressor, obtains carbon dioxide compression gas after three stage compression;
(4) join in reactor by the calcium oxide of preparation, then add the water of 3 times of weight, be warming up to 80-90 DEG C, react 35min at this temperature under stirring, reaction terminates rear cooling down, obtains calcium hydroxide suspension;
(5) join in autoclave by the calcium hydroxide suspension of preparation, then pass into carbon dioxide, control carbon dioxide flow is 0.1-0.2m
3/ h, reacts under room temperature, stops reaction when reaction pressure drops to 0.6MPa and keeps 1h constant, obtains white crystals body, then is placed on dry 10h in vacuum desiccator, finally obtain nano-calcium carbonate calcium powder after reactant liquor dehydration.
The purity of the nano-calcium carbonate calcium powder prepared according to above-mentioned steps higher than 97%, whiteness higher than 93%, granularity is 400-500nm.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. a production method for industrial sedimentation type nano-calcium carbonate, is characterized in that, comprise the steps:
(1) first lime stone is placed in drier, is then warming up to 105-110 DEG C of dry 1-2h;
(2) dried lime stone is dropped in rotary kiln, heat up after preheater preheats and calcine, again through cooler cooling after calcining terminates, when temperature is down to below 100 DEG C, the calcium oxide of generation is drawn off;
(3) flue gas discharged by rotary kiln by air-introduced machine sends into scrubbing tower, undertaken washing rear gas by water at low temperature and enter steam-water separator, isolated gas sends into the absorption tower that serotonin solution is housed, gained absorbing liquid enters regenerator subsequently and releases gas through reboiler heating, gas enters steam-water separator after the cooling of regeneration condenser, isolated gas enters desulfurizing tower, and the gas after desulfurization enters compressor, obtains carbon dioxide compression gas after three stage compression;
(4) join in reactor by the calcium oxide of preparation, then add the water of 3-4 times of weight, be warming up to 80-90 DEG C, react 30-35min at this temperature under stirring, reaction terminates rear cooling down, obtains calcium hydroxide suspension;
(5) join in autoclave by the calcium hydroxide suspension of preparation, then pass into carbon dioxide, control carbon dioxide flow is 0.1-0.2m
3/ h, reacts under room temperature, stops reaction when reaction pressure drops to 0.6MPa and keeps 1h constant, obtains white crystals body, then is placed on dry 8-12h in vacuum desiccator, finally obtain nano-calcium carbonate calcium powder after reactant liquor dehydration.
2. the production method of a kind of industrial sedimentation type nano-calcium carbonate according to claim 1, is characterized in that: in described lime stone, the content of calcium carbonate is greater than 80%.
3. the production method of a kind of industrial sedimentation type nano-calcium carbonate according to claim 1, is characterized in that: the granularity of described lime stone is 30-50mm.
4. the production method of a kind of industrial sedimentation type nano-calcium carbonate according to claim 1, is characterized in that: described calcining maximum temperature is 1100-1200 DEG C.
5. the production method of a kind of industrial sedimentation type nano-calcium carbonate according to claim 1, is characterized in that: the purity of described nano-calcium carbonate calcium powder higher than 97%, whiteness higher than 93%, granularity is 400-500nm.
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| CN201410767763.9A CN104556184A (en) | 2014-12-12 | 2014-12-12 | Method for producing industrial precipitation-type nano calcium carbonate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105948093A (en) * | 2016-04-27 | 2016-09-21 | 深圳市第四能源科技有限公司 | Process for controlling particle size of sulfur-fixation nano calcium carbonate by using static magnetic field |
| CN106517288A (en) * | 2016-11-26 | 2017-03-22 | 耿亚琼 | Method for preparing light calcium carbonate from limestone |
| CN109133025A (en) * | 2018-11-15 | 2019-01-04 | 宁夏宁杭循环科技股份有限公司 | The novel exquisite carbonic acid of one kind is synthetically prepared production technology |
| CN112624634A (en) * | 2020-12-16 | 2021-04-09 | 张照鹏 | Desulfurization and decarburization system and desulfurization and decarburization method |
| CN114057215A (en) * | 2021-11-17 | 2022-02-18 | 郑州大学 | Method for preparing high-purity calcium sulfate by utilizing desulfurized gypsum |
| CN115448349A (en) * | 2022-08-31 | 2022-12-09 | 江西盖亚环保科技有限公司 | Method for recovering calcium salt from waste incineration fly ash |
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| CN101314102A (en) * | 2008-05-30 | 2008-12-03 | 西安热工研究院有限公司 | Method and apparatus for collecting carbonic anhydride in coal-fired plant flue gas |
| CN101880051A (en) * | 2009-05-07 | 2010-11-10 | 河南科力新材料股份有限公司 | Preparation method of suspended nano-calcium carbonate for food |
| CN103509378A (en) * | 2013-10-22 | 2014-01-15 | 山西兰花华明纳米材料有限公司 | Normal-temperature high-air-flow industrial nano-calcium carbonate preparation method |
| CN103980733A (en) * | 2014-05-26 | 2014-08-13 | 青州宇信钙业股份有限公司 | Method for synthesizing and modifying highly dispersed nanoscale calcium carbonate and multifunctional calcium carbonate reaction kettle |
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- 2014-12-12 CN CN201410767763.9A patent/CN104556184A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101314102A (en) * | 2008-05-30 | 2008-12-03 | 西安热工研究院有限公司 | Method and apparatus for collecting carbonic anhydride in coal-fired plant flue gas |
| CN101880051A (en) * | 2009-05-07 | 2010-11-10 | 河南科力新材料股份有限公司 | Preparation method of suspended nano-calcium carbonate for food |
| CN103509378A (en) * | 2013-10-22 | 2014-01-15 | 山西兰花华明纳米材料有限公司 | Normal-temperature high-air-flow industrial nano-calcium carbonate preparation method |
| CN103980733A (en) * | 2014-05-26 | 2014-08-13 | 青州宇信钙业股份有限公司 | Method for synthesizing and modifying highly dispersed nanoscale calcium carbonate and multifunctional calcium carbonate reaction kettle |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105948093A (en) * | 2016-04-27 | 2016-09-21 | 深圳市第四能源科技有限公司 | Process for controlling particle size of sulfur-fixation nano calcium carbonate by using static magnetic field |
| CN106517288A (en) * | 2016-11-26 | 2017-03-22 | 耿亚琼 | Method for preparing light calcium carbonate from limestone |
| CN109133025A (en) * | 2018-11-15 | 2019-01-04 | 宁夏宁杭循环科技股份有限公司 | The novel exquisite carbonic acid of one kind is synthetically prepared production technology |
| CN112624634A (en) * | 2020-12-16 | 2021-04-09 | 张照鹏 | Desulfurization and decarburization system and desulfurization and decarburization method |
| CN114057215A (en) * | 2021-11-17 | 2022-02-18 | 郑州大学 | Method for preparing high-purity calcium sulfate by utilizing desulfurized gypsum |
| CN115448349A (en) * | 2022-08-31 | 2022-12-09 | 江西盖亚环保科技有限公司 | Method for recovering calcium salt from waste incineration fly ash |
| CN115448349B (en) * | 2022-08-31 | 2023-12-08 | 江西盖亚环保科技有限公司 | Method for recycling calcium salt from waste incineration fly ash |
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