CN101967044B - Method for preparing cement active admixture by utilizing dedusting ash in calcium carbide production and device thereof - Google Patents
Method for preparing cement active admixture by utilizing dedusting ash in calcium carbide production and device thereof Download PDFInfo
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- CN101967044B CN101967044B CN2010102914555A CN201010291455A CN101967044B CN 101967044 B CN101967044 B CN 101967044B CN 2010102914555 A CN2010102914555 A CN 2010102914555A CN 201010291455 A CN201010291455 A CN 201010291455A CN 101967044 B CN101967044 B CN 101967044B
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- calcium carbide
- precipitator dust
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- oxidation
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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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a method for preparing a cement active admixture by utilizing dedusting ash in calcium carbide production. The method comprises: a calcium carbide dedusting ash oxidizing and cooling device is arranged below the ash outlet of a calcium carbide deduster; calcium carbide dedusting ash discharged by the calcium carbide deduster at regular time falls into the calcium carbide dedusting ash oxidizing and cooling device by means of the gravity and is scattered in a feed container; the calcium carbide dedusting ash is fully contacted with cooling air blown in by a cooling fan so as to realize oxidation and cooling; the cooled calcium carbide dedusting ash is discharged by a spiral horizontal conveyor in the device, wherein in the oxidizing and cooling process, the solid-gas ratio of the calcium carbide dedusting ash to the blown-in air is 0.5-2kg/m<3>, and the temperature of the oxidized and cooled calcium carbide dedusting ash is less than 100 DEG C; and then the calcium carbide dedusting ash discharged by the calcium carbide dedusting ash oxidizing and cooling device is transported to a cement producing grinder, and is added into cement, thus obtaining the calcium carbide dedusting ash cement, wherein the calcium carbide dedusting ash accounts for 5-30% of the total weight of the cement. The invention has the advantages of low equipment investment, simple process, convenient implementation, and no need of changing the original deduster for calcium carbide plants.
Description
Technical field
The invention belongs to resources circulation science and technology field, relate to the comprehensive utilization of calcium carbide precipitator dust in the calcium carbide production process, particularly a kind of method and device thereof that utilizes calcium carbide production dedusting ash to prepare active addition of cement.
Background technology
As everyone knows, in calcium carbide production process, because temperature of reaction is high, produces a large amount of industrial dust, traditional method is that high temperature dust gas is cooled off, and realizes separating of calcium carbide dust and gas with the cloth bag filtration, reaches the reduction dust discharge, protects environment.Yet, but never obtaining good use through the collected calcium carbide dust of dedusting, major part is filled out ditch and is buried, and is prone to cause secondary pollution.
The application of calcium carbide precipitator dust in cement material be the scientific worker expect easily fully utilize direction the most easily.Yet; The calcium carbide precipitator dust chemical component fluctuation is big, particle size distribution range is big, content of magnesia is high, loss on ignition is big, and under difference cooling and oxidizing condition, the gelation activity of the dust of acquisition in cement differs greatly; Make that the application in cement is restricted calcium carbide precipitator dust as active mixed material; How rationally to utilize this trade waste, the lateral reactivity of maximum this type of performance dust is the subject matter that those skilled in the art pay close attention to.
Summary of the invention
Defective or deficiency to above-mentioned prior art exists the objective of the invention is to, and a kind of oxidation and refrigerating unit of calcium carbide production dedusting ash is provided; The present invention is based on the calcium carbide dust that dedusting obtains in the calcium carbide production process and be in reduced state usually, can be oxidized in case from fly-ash separator, put into atmospheric environment, but spontaneous combustion; Principle can be formed,, abundant oxidation can be realized through controlling its oxidation and process of cooling with certain gelation activity powder; Cool off fast, promptly obtain having the powder of very high gelation activity, can in cement, realize directly adding using; Turn waste into wealth energy-saving and emission-reduction.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of method of utilizing calcium carbide production dedusting ash to prepare active addition of cement is characterized in that, is undertaken by following two steps:
(1) oxidation of calcium carbide precipitator dust and cooling
A calcium carbide precipitator dust oxidation refrigerating unit is set below calcium carbide fly-ash separator ash output hole; The calcium carbide precipitator dust that the calcium carbide fly-ash separator is regularly discharged relies on gravity to fall into the oxidation refrigerating unit; In material box, broken up simultaneously, calcium carbide precipitator dust fully contacts with the cooling air that cooling blower blasts, and realizes oxidation and cooling; Cooled calcium carbide precipitator dust is discharged through the spiral horizontal conveyor in the device, and calcium carbide precipitator dust was 0.5-2kg/m with the solid-gas ratio that blasts air when wherein oxidation was cooled off
3, the temperature of oxidation and cooled calcium carbide precipitator dust is less than 100 ℃;
Described calcium carbide precipitator dust oxidation refrigerating unit includes material box at least; Be distributed with material in the material box and break up crossbeam; Material box is positioned on the bracket upright post; The discharge port of material box has the spiral horizontal conveyor, and this spiral horizontal conveyor is driven by screw motor, is connected with discharging on the spiral horizontal conveyor and promotes spiral; Also be provided with the cooling air distribution case that is communicated with material box in the material box Lower Half, cooling air distribution case is connected with cooling blower;
The calcium carbide precipitator dust of (2) calcium carbide precipitator dust oxidation refrigerating unit being discharged is transported in the manufacture of cement mill, evenly adds in the cement with calcium carbide precipitator dust and cement total weight percent 5-30%, promptly obtains calcium carbide precipitator dust cement.
The technique effect that the present invention brought is:
First; The present invention is with the calcium carbide precipitator dust of regularly discharging in calcium carbide fly-ash separator fluidisation cooling after calcium carbide precipitator dust oxidation refrigerating unit is broken up; The oxidation rate and the degree of oxidation of calcium carbide precipitator dust have greatly been improved; Accelerated the speed of cooling of calcium carbide precipitator dust, the calcium carbide precipitator dust that obtains can add in the cement immediately and uses.It is slow to have overcome under traditional calcium carbide precipitator dust stacking states oxidation, problem such as powder granule is reunited easily, and pozzolanic activity is low.
Secondly, the calcium carbide precipitator dust gelation activity of handling through the present invention is high, can directly add and replace cement in the cement, has increased substantially the using value of calcium carbide precipitator dust.
The 3rd, present device drops into low, and technology is simple, does not change the original dust removal installation of calcium carbide factory, convenient enforcement.
Description of drawings
Fig. 1 is a calcium carbide precipitator dust oxidation refrigerating unit structural representation, and (a) is front view among the figure, (b) is side-view; Label among the figure is represented respectively: 1, material box, 2, bracket upright post, 3, screw motor, 4, material breaks up crossbeam, 5, the spiral horizontal conveyor, 6, cooling blower, 7, discharging promotes spiral, 8, cooling air distribution case.
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.
Embodiment
Prepare the method for cement according to calcium carbide production dedusting ash of the present invention, mainly comprise following two steps:
(1) oxidation of calcium carbide precipitator dust and cooling
A calcium carbide precipitator dust oxidation refrigerating unit is set below calcium carbide fly-ash separator ash output hole; The calcium carbide precipitator dust that the calcium carbide fly-ash separator is regularly discharged relies on gravity to fall into the oxidation refrigerating unit; In material box, broken up simultaneously, calcium carbide precipitator dust fully contacts with the cooling air that cooling blower blasts, and realizes oxidation and cooling; Cooled calcium carbide precipitator dust is discharged through the spiral horizontal conveyor in the device, and calcium carbide precipitator dust was 0.5-2kg/m with the solid-gas ratio that blasts air when wherein oxidation was cooled off
3, the temperature of oxidation and cooled calcium carbide precipitator dust is less than 100 ℃;
Calcium carbide precipitator dust oxidation refrigerating unit is as shown in Figure 1; This device includes a material box 1 at least; The first half in the material box 1 is evenly distributed with material and breaks up crossbeam 4, and material box is positioned on the bracket upright post 2, and the discharge port of material box 1 bottom has spiral horizontal conveyor 5; This spiral horizontal conveyor 5 is driven by screw motor 3, is connected with discharging on the spiral horizontal conveyor 5 and promotes spiral 7; In material box 1 Lower Half, promptly the discharge port top also is provided with the cooling air distribution case 8 that is communicated with material box 1, and cooling air distribution case 8 is connected with cooling blower 6.
The calcium carbide precipitator dust of (2) calcium carbide precipitator dust oxidation refrigerating unit being discharged is transported in the manufacture of cement mill, evenly adds in the cement with calcium carbide precipitator dust and cement total weight percent 5-30%, promptly obtains calcium carbide precipitator dust cement.
The working process of above-mentioned calcium carbide precipitator dust oxidation refrigerating unit is: material box 1 is accepted the calcium carbide precipitator dust of discharging from the calcium carbide fly-ash separator; Breaing up crossbeam 4 through material moves downward by gravity; Heat exchange is carried out with the calcium carbide precipitator dust that falls and broken up in cooling air distribution case 8 backs of the cooling air access to plant bottom that cooling blower 6 blasts; Realize the oxidation and the cooling of calcium carbide precipitator dust, the calcium carbide precipitator dust spiral horizontal conveyor 5 of the discharge port setting through material box 1 bottom at last promotes spiral 7 with discharging and transfers out.
It below is the specific embodiment that the contriver provides.
Embodiment 1:
Solid-gas ratio is 0, that is, calcium carbide precipitator dust cooled off 24 hours under natural stacking states; The yellow material that obtains adds in the 42.5R cement according to 5% and 8% percentage by weight, and cement performance descends to some extent, adds significantly in 32.5 cement; Intensity obviously descends, and the results are shown in following table:
Embodiment 2:
According to method of the present invention, calcium carbide precipitator dust takes out from calcium carbide precipitator dust oxidation refrigerating unit, 15 minutes cooling times in device of calcium carbide precipitator dust, solid-gas ratio 0.5kg/m
3, the Steel Gray material of acquisition adds in the 42.5R cement according to 5% and 8% weight percent, and performance does not only descend, and slightly improves on the contrary, and the result sees the following form:
Embodiment 3:
According to method of the present invention, calcium carbide precipitator dust takes out from calcium carbide precipitator dust oxidation refrigerating unit, 15 minutes cooling times in device of calcium carbide precipitator dust, solid-gas ratio 1.5kg/m
3, obtaining gray material and add in the 42.5R cement according to 5% and 8% weight percent, cement performance changes little, like following table:
Embodiment 4:
According to method of the present invention; Calcium carbide precipitator dust takes out from calcium carbide precipitator dust oxidation refrigerating unit; 15 minutes cooling times in device of calcium carbide precipitator dust, solid-gas ratio 1kg/m3 obtains gray material and adds in 32.5 cement according to 15%, 20% and 30% weight percent; Degradation and not obvious, like following table:
Claims (2)
1. a method of utilizing calcium carbide production dedusting ash to prepare active addition of cement is characterized in that, is undertaken by following two steps:
(1) oxidation of calcium carbide precipitator dust and cooling:
A calcium carbide precipitator dust oxidation refrigerating unit is set below calcium carbide fly-ash separator ash output hole; The calcium carbide precipitator dust that the calcium carbide fly-ash separator is regularly discharged relies on gravity to fall into the oxidation refrigerating unit; In material box, broken up simultaneously, calcium carbide precipitator dust fully contacts with the cooling air that cooling blower blasts, and realizes oxidation and cooling; Cooled calcium carbide precipitator dust is discharged through the spiral horizontal conveyor in the device, and calcium carbide precipitator dust was 0.5-2kg/m with the solid-gas ratio that blasts air when wherein oxidation was cooled off
3, the temperature of oxidation and cooled calcium carbide precipitator dust is less than 100 ℃;
Described calcium carbide precipitator dust oxidation refrigerating unit includes material box at least, is distributed with material in the material box and breaks up crossbeam, and material box is positioned on the bracket upright post; The discharge port of material box has the spiral horizontal conveyor; This spiral horizontal conveyor is driven by screw motor; Be connected with discharging on the spiral horizontal conveyor and promote spiral, also be provided with the cooling air distribution case that is communicated with material box in the material box Lower Half, cooling air distribution case is connected with cooling blower;
The calcium carbide precipitator dust of (2) calcium carbide precipitator dust oxidation refrigerating unit being discharged is transported in the manufacture of cement mill, evenly joins in the cement with calcium carbide precipitator dust and cement gross weight 5%-30%, promptly obtains calcium carbide precipitator dust cement.
2. calcium carbide precipitator dust oxidation refrigerating unit, this device includes material box (1) at least, is distributed with material in the material box (1) and breaks up crossbeam (4), and material box (1) is positioned on the bracket upright post (2); The discharge port of material box (1) has spiral horizontal conveyor (5); This spiral horizontal conveyor (5) is driven by screw motor (3); Be connected with discharging on the spiral horizontal conveyor (5) and promote spiral (7); At the cooling air distribution case (8) that the material box Lower Half also is provided with and material box (1) is communicated with, cooling air distribution case (8) is connected with cooling blower (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102914555A CN101967044B (en) | 2010-09-26 | 2010-09-26 | Method for preparing cement active admixture by utilizing dedusting ash in calcium carbide production and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102914555A CN101967044B (en) | 2010-09-26 | 2010-09-26 | Method for preparing cement active admixture by utilizing dedusting ash in calcium carbide production and device thereof |
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| CN101967044A CN101967044A (en) | 2011-02-09 |
| CN101967044B true CN101967044B (en) | 2012-09-26 |
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| CN106242331A (en) * | 2016-08-12 | 2016-12-21 | 天伟水泥有限公司 | A kind of carbide purifies ash second-time burning and produces the formula of cement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5865872A (en) * | 1995-06-26 | 1999-02-02 | Fenicem Minerals Inc. | Method of recovering metals and producing a secondary slag from base metal smelter slag |
| CN101116794A (en) * | 2007-09-12 | 2008-02-06 | 长安大学 | Method for preparing flue gas desulfurization agent |
| CN101275092A (en) * | 2007-03-26 | 2008-10-01 | 彭德智 | Molded coal made of calcium carbide precipitator dust |
| CN101591150A (en) * | 2008-05-26 | 2009-12-02 | 同方环境股份有限公司 | A kind of method of utilizing silico-calcium slag and carbide slag to produce silicate cement |
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- 2010-09-26 CN CN2010102914555A patent/CN101967044B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5865872A (en) * | 1995-06-26 | 1999-02-02 | Fenicem Minerals Inc. | Method of recovering metals and producing a secondary slag from base metal smelter slag |
| CN101275092A (en) * | 2007-03-26 | 2008-10-01 | 彭德智 | Molded coal made of calcium carbide precipitator dust |
| CN101116794A (en) * | 2007-09-12 | 2008-02-06 | 长安大学 | Method for preparing flue gas desulfurization agent |
| CN101591150A (en) * | 2008-05-26 | 2009-12-02 | 同方环境股份有限公司 | A kind of method of utilizing silico-calcium slag and carbide slag to produce silicate cement |
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