CN212334613U - Utilize carbide slag preparation miropowder calcium carbonate's device - Google Patents
Utilize carbide slag preparation miropowder calcium carbonate's device Download PDFInfo
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- CN212334613U CN212334613U CN202021355966.4U CN202021355966U CN212334613U CN 212334613 U CN212334613 U CN 212334613U CN 202021355966 U CN202021355966 U CN 202021355966U CN 212334613 U CN212334613 U CN 212334613U
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Abstract
A device for preparing micro-powder calcium carbonate by using carbide slag comprises a refining unit, a carbonization unit, a thickening and pressure filtration unit and a drying unit, wherein the refining unit comprises a strong magnetic separator, a mixing and stirring tank, a first hydrocyclone, a flotation and stirring tank and a flotation machine, the carbonization unit comprises at least two groups of carbonization tanks, the thickening and pressure filtration unit comprises a thickener, a second hydrocyclone and a pressure filter, and the drying unit comprises a drying and scattering machine and a product collector. The method comprises the following steps: removing iron compounds in the raw materials by using a strong magnetic separator; preparing carbide slag slurry by using a mixing and stirring tank; removing impurities from the slurry by using a first hydrocyclone; adjusting the pH value of the slurry in a flotation stirring tank; desiliconizing and decarbonizing the slurry in a flotation machine; preparing calcium carbonate slurry in a carbonization tank; increasing the concentration of calcium carbonate slurry in a concentrator; further thickening the slurry with a second hydrocyclone; dehydrating the slurry by a filter press to prepare a calcium carbonate filter cake; drying and crushing the calcium carbonate filter cake to form micro powder calcium carbonate.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry, especially, relate to a device for utilizing carbide slag to prepare miropowder calcium carbonate.
Background
According to statistics, the existing calcium carbide production capacity in China is about 2600 ten thousand tons, the produced calcium carbide slag exceeds 3500 ten thousand tons every year, and the main mineral component in the calcium carbide slag is Ca (OH)2The proportion of the carbide slag in the carbide slag reaches 70 to 85 percent. At present, only a small part of the carbide slag is used for manufacturing cement with low added value, most of the rest carbide slag is not recycled, the part of the carbide slag not only occupies a large amount of land, but also can cause pollution to ecological environment, underground water, soil and the like due to hydrolysis of alkali liquor of the carbide slag and residual carbide. Therefore, it is necessary to solve the problem of difficult recycling of the carbide slag.
To this end, chinese patent application No. 200610031408.0 discloses a method for preparing high-purity fine light calcium carbonate powder from carbide slag, and chinese patent application No. 201310691661.9 discloses a method for preparing nano calcium carbonate from carbide slag as a raw material, although both of the above-mentioned patent applications relate to a method for recycling carbide slag, one of which is used for preparing fine calcium carbonate powder, and the other is used for preparing nano calcium carbonate from carbide slag. However, the methods of both of the above patent applications have problems. Firstly, ammonia water exists in the intermediate product, and the ammonia water belongs to chemical dangerous goods, and has higher storage condition and use requirements; secondly, how to remove the ferryides and carbon residues in the carbide slag is not mentioned, and the ferryides and the carbon residues are main factors influencing the quality and whiteness of the micro-powder calcium carbonate; thirdly, the method has the defects of long process flow, complex process, high impurity content of products, poor product quality and the like.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a device for utilize carbide slag preparation miropowder calcium carbonate does not have the existence of aqueous ammonia in the intermediate product, through ferruginous substance and the carbon residue in the desorption carbide slag, has effectively improved miropowder calcium carbonate's quality and whiteness degree, has simple, the easy operation of process flow, characteristics that the energy consumption is low simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a device for preparing micro-powder calcium carbonate by using carbide slag comprises a refining unit, a carbonization unit, a thickening and pressure filtering unit and a drying unit; the refining unit comprises a strong magnetic separator, a mixing and stirring tank, a first hydrocyclone, a flotation and stirring tank and a flotation machine; the carbonization unit comprises at least two groups of carbonization tanks; the thickening and pressure filtering unit comprises a thickener, a second hydrocyclone and a pressure filter; the drying unit comprises a drying and scattering machine and a product collector; the feed inlet of the strong magnetic separator is used for inputting carbide slag raw materials, the first discharge outlet of the strong magnetic separator is used for discharging magnetically separated ferrites, the second discharge outlet of the strong magnetic separator is used for outputting the carbide slag raw materials without the ferrites, the second discharge outlet of the strong magnetic separator is communicated with the top feed inlet of the mixing and stirring tank, the bottom discharge outlet of the mixing and stirring tank is communicated with the top feed inlet of the first hydrocyclone, the bottom slag discharge outlet of the first hydrocyclone is used for discharging solid impurities, and the top slurry outlet of the first hydrocyclone is used for discharging carbide slag slurry; the top slurry outlet of the first hydrocyclone is communicated with the top feed inlet of the flotation stirring tank, the bottom discharge outlet of the flotation stirring tank is communicated with the top feed inlet of the flotation machine, the slag discharge port of the flotation machine is used for discharging solid impurities, and the slurry outlet of the flotation machine is used for discharging carbide slag slurry; the slurry outlet of the flotation machine is communicated with the top feed inlet of the carbonization tank, the bottom discharge port of the carbonization tank is used for discharging calcium carbonate slurry, and the top clear liquid outlet of the carbonization tank is communicated with the mixing stirring tank and the top feed inlet of the flotation stirring tank; the bottom discharge port of the carbonization tank is communicated with the top feed port of the thickener, the top clarified liquid outlet of the thickener is communicated with the top feed ports of the mixing stirring tank and the flotation stirring tank, the bottom discharge port of the thickener is communicated with the top feed port of the second hydrocyclone, the top low-concentration slurry outlet of the second hydrocyclone is communicated with the top feed port of the thickener, the bottom high-concentration slurry outlet of the second hydrocyclone is communicated with the feed port of the filter press, the filtrate outlet of the filter press is communicated with the top feed ports of the mixing stirring tank and the flotation stirring tank, the discharge port of the filter press is communicated with the feed port of the drying scattering machine, the discharge port of the drying scattering machine is communicated with the feed port of the product collector, and the discharge port of the product collector is used for discharging the calcium carbonate micropowder.
A method for preparing micro powder calcium carbonate by using carbide slag adopts the device for preparing micro powder calcium carbonate by using carbide slag, and comprises the following steps:
the method comprises the following steps: refining
The method comprises the following steps: the carbide slag raw material is input into a strong magnetic separator after being metered, and ferriferous materials in the carbide slag raw material are separated and discharged through the strong magnetic separator, so that the content of the ferriferous materials in the carbide slag raw material is reduced to be below 0.15%;
step two: inputting the carbide slag raw material without the ferrate into a mixing and stirring tank, and simultaneously inputting hot water into the mixing and stirring tank to prepare carbide slag slurry with the mass concentration of 30-40% in the mixing and stirring tank;
step three: inputting the prepared carbide slag slurry into a first hydrocyclone, and separating and discharging solid impurities in the carbide slag slurry through the first hydrocyclone;
step IV: inputting the carbide slag slurry without solid impurities into a flotation stirring tank, and simultaneously inputting a certain amount of a capture agent, a foaming agent and a pH value regulator into the flotation stirring tank to ensure that the pH value of the carbide slag slurry is between 7.0 and 7.5;
step five: inputting the carbide slag slurry with the adjusted pH value into a flotation machine, simultaneously inputting a desilication flotation agent into the flotation machine, and carrying out three times of reverse flotation desilication to reduce the silicon content in the carbide slag raw material to below 1.7%, and directly separating and discharging solid impurities generated in the desilication process;
step (c): after the third reverse flotation desilication of the carbide slag slurry is completed, a decarburization flotation agent is input into the flotation machine, and only one flotation decarburization is carried out, so that the carbon content in the carbide slag raw material is reduced to below 0.7%, and solid impurities generated in the decarburization process are directly separated and discharged;
step two: carbonizing
The method comprises the following steps: inputting the carbide slag slurry without silicon and carbon into a carbonization tank, and simultaneously inputting hot water into the carbonization tank to reduce the mass concentration of the carbide slag slurry to 10-15%, and adjusting the temperature of the carbide slag slurry to 50-80 ℃;
step two: inputting carbon dioxide gas into the carbonization tank, and stirring to enable the carbide slag slurry to react with the carbon dioxide gas for 2-10 hours until calcium carbonate slurry is formed in the carbonization tank;
step three: thickening and filter pressing
The method comprises the following steps: inputting the calcium carbonate slurry into a concentrator, and increasing the mass concentration of the calcium carbonate slurry to 45-50% by the concentrator;
step two: inputting the concentrated calcium carbonate slurry into a second hydrocyclone, and further concentrating the calcium carbonate slurry through the second hydrocyclone until the mass concentration of the calcium carbonate slurry is increased to 70-75%;
step three: inputting the thickened calcium carbonate slurry into a filter press, and dehydrating the calcium carbonate slurry through the filter press until a calcium carbonate filter cake with the water content of 12-17% is formed;
step four: drying
The method comprises the following steps: conveying the dehydrated calcium carbonate filter cake into a drying and scattering machine, drying and smashing the calcium carbonate filter cake by the drying and scattering machine, wherein the drying temperature is 70-120 ℃, until micro-powder calcium carbonate with the water content of less than 1% is formed;
step two: inputting the micro powder calcium carbonate into a product collector for storage.
The utility model has the advantages that:
the utility model discloses a utilize carbide slag to prepare device of miropowder calcium carbonate, do not have the existence of aqueous ammonia in the intermediate product, through ferralia and the carbon residue in the desorption carbide slag, effectively improved miropowder calcium carbonate's quality and whiteness degree, have simultaneously that process flow is simple, easy operation, characteristics that the energy consumption is low.
Drawings
FIG. 1 is a schematic structural diagram of a device for preparing calcium carbonate micropowder from carbide slag according to the present invention;
in the figure, I-a refining unit, II-a carbonization unit, III-a thickening and pressure filtering unit, IV-a drying unit, 1-a strong magnetic separator, 2-a mixing and stirring tank, 3-a first hydrocyclone, 4-a flotation and stirring tank, 5-a flotation machine, 6-a carbonization tank, 7-a thickener, 8-a second hydrocyclone, 9-a pressure filter, 10-a drying and scattering machine, 11-a product collector, A-a carbide slag raw material, B-a ferrite, C-solid impurities and D-micropowder calcium carbonate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a device for preparing micro-powder calcium carbonate by using carbide slag comprises a refining unit I, a carbonization unit II, a thickening and pressure filtering unit III and a drying unit IV; the refining unit I comprises a strong magnetic separator 1, a mixing and stirring tank 2, a first hydrocyclone 3, a flotation stirring tank 4 and a flotation machine 5; the carbonization unit II comprises at least two groups of carbonization tanks 6; the thickening and pressure filtering unit III comprises a thickener 7, a second hydrocyclone 8 and a pressure filter 9; the drying unit IV comprises a drying and scattering machine 10 and a product collector 11; the feed inlet of the strong magnetic separator 1 is used for inputting a carbide slag raw material A, the first discharge outlet of the strong magnetic separator 1 is used for discharging magnetically separated ferrites B, the second discharge outlet of the strong magnetic separator 1 is used for outputting the carbide slag raw material A without the ferrites B, the second discharge outlet of the strong magnetic separator 1 is communicated with the top feed inlet of the mixing and stirring tank 2, the bottom discharge outlet of the mixing and stirring tank 2 is communicated with the top feed inlet of the first hydrocyclone 3, the bottom discharge outlet of the first hydrocyclone 3 is used for discharging solid impurities C, and the top slurry outlet of the first hydrocyclone 3 is used for discharging carbide slag slurry; the top slurry outlet of the first hydrocyclone 3 is communicated with the top feed inlet of the flotation stirring tank 4, the bottom discharge outlet of the flotation stirring tank 4 is communicated with the top feed inlet of the flotation machine 5, the slag discharge port of the flotation machine 5 is used for discharging solid impurities C, and the slurry outlet of the flotation machine 5 is used for discharging carbide slag slurry; a slurry outlet of the flotation machine 5 is communicated with a top feed inlet of the carbonization tank 6, a bottom discharge port of the carbonization tank 6 is used for discharging calcium carbonate slurry, and a top clear liquid outlet of the carbonization tank 6 is communicated with top feed inlets of the mixing and stirring tank 2 and the flotation stirring tank 4; the bottom discharge port of the carbonization tank 6 is communicated with the top feed port of the thickener 7, the top clarified liquid outlet of the thickener 7 is communicated with the top feed ports of the mixing stirring tank 2 and the flotation stirring tank 4, the bottom discharge port of the thickener 7 is communicated with the top feed port of the second hydrocyclone 8, the top low-concentration slurry outlet of the second hydrocyclone 8 is communicated with the top feed port of the thickener 7, the bottom high-concentration slurry outlet of the second hydrocyclone 8 is communicated with the feed port of the filter press 9, the filtrate outlet of the filter press 9 is communicated with the top feed ports of the mixing stirring tank 2 and the flotation stirring tank 4, the discharge port of the filter press 9 is communicated with the feed port of the drying and scattering machine 10, the discharge port of the drying and scattering machine 10 is communicated with the feed port of the product collector 11, and the discharge port of the product collector 11 is used for discharging the micro-.
In the embodiment, the granularity of the carbide slag raw material A is less than or equal to 0.1mm, the water content of the carbide slag raw material A is 13-16%, the content of an iron compound B in the carbide slag raw material A is 0.5%, the content of silicon in the carbide slag raw material A is 4-5%, and the content of carbon in the carbide slag raw material A is 2%; the flotation agent is divided into a desiliconization flotation agent and a decarburization flotation agent, the desiliconization flotation agent adopts sodium hexametaphosphate and dodecylamine, and the decarburization flotation agent adopts kerosene and 12# oil; the number of the carbonization tanks 6 is two, one is used for carrying out conventional carbonization reaction, the other is used for thickening the clarified liquid, and the two carbonization tanks 6 are alternately used; directly returning the top clarified liquid of the carbonization tank 6, the top clarified liquid of the thickener 7 and the filtrate of the filter press 9 to the mixing and stirring tank 2 and the flotation and stirring tank 4 of the refining unit I for recycling; the low-concentration slurry at the top of the second hydrocyclone 8 is directly returned to the thickener 7 for recycling.
A method for preparing micro powder calcium carbonate by using carbide slag adopts the device for preparing micro powder calcium carbonate by using carbide slag, and comprises the following steps:
the method comprises the following steps: refining
The method comprises the following steps: the carbide slag raw material A is input into a strong magnetic separator 1 after being metered, and the ferryides B in the carbide slag raw material A are separated and discharged through the strong magnetic separator 1, so that the content of the ferryides B in the carbide slag raw material A is reduced to be below 0.15%;
step two: inputting the carbide slag raw material A without the ferrate B into a mixing and stirring tank 2, and simultaneously inputting hot water into the mixing and stirring tank 2 to prepare carbide slag slurry with the mass concentration of 30-40% in the mixing and stirring tank 2;
step three: inputting the prepared carbide slag slurry into a first hydrocyclone 3, and separating and discharging solid impurities C in the carbide slag slurry through the first hydrocyclone 3;
step IV: inputting the carbide slag slurry without the solid impurity C into a flotation stirring tank 4, and simultaneously inputting a certain amount of a capture agent, a foaming agent and a pH value regulator into the flotation stirring tank 4 to ensure that the pH value of the carbide slag slurry is between 7.0 and 7.5;
step five: inputting the carbide slag slurry with the adjusted pH value into a flotation machine 5, simultaneously inputting a desilication flotation agent into the flotation machine 5, and carrying out three times of reverse flotation desilication to reduce the silicon content in the carbide slag raw material A to below 1.7%, and directly separating and discharging solid impurities C generated in the desilication process;
step (c): after the third reverse flotation desilication of the carbide slag slurry is completed, a decarburization flotation agent is input into the flotation machine 5, and only one flotation decarburization is performed, so that the carbon content in the carbide slag raw material A is reduced to below 0.7%, and solid impurities C generated in the decarburization process are directly separated and discharged;
step two: carbonizing
The method comprises the following steps: inputting the carbide slag slurry without silicon and carbon into a carbonization tank 6, and simultaneously inputting hot water into the carbonization tank 6 to reduce the mass concentration of the carbide slag slurry to 10-15%, and adjusting the temperature of the carbide slag slurry to 50-80 ℃;
step two: carbon dioxide gas is input into the carbonization tank 6, and the carbide slag slurry and the carbon dioxide gas are reacted by stirring for 2-10 h until calcium carbonate slurry is formed in the carbonization tank 6;
step three: thickening and filter pressing
The method comprises the following steps: inputting the calcium carbonate slurry into a thickener 7, and increasing the mass concentration of the calcium carbonate slurry to 45-50% by the thickener 7;
step two: inputting the concentrated calcium carbonate slurry into a second hydrocyclone 8, and further concentrating the calcium carbonate slurry through the second hydrocyclone 8 until the mass concentration of the calcium carbonate slurry is increased to 70-75%;
step three: inputting the thickened calcium carbonate slurry into a filter press 9, and dehydrating the calcium carbonate slurry through the filter press 9 until a calcium carbonate filter cake with the water content of 12-17% is formed;
step four: drying
The method comprises the following steps: inputting the dehydrated calcium carbonate filter cake into a drying and scattering machine 10, drying and scattering the calcium carbonate filter cake by the drying and scattering machine 10, wherein the drying temperature is 70-120 ℃ until micro-powder calcium carbonate D with the water content of less than 1% is formed;
step two: inputting the micropowder calcium carbonate D into a product collector 11 for storage.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. The utility model provides a device for utilize carbide slag preparation miropowder calcium carbonate which characterized in that: comprises a refining unit, a carbonization unit, a thickening and pressure filtering unit and a drying unit; the refining unit comprises a strong magnetic separator, a mixing and stirring tank, a first hydrocyclone, a flotation and stirring tank and a flotation machine; the carbonization unit comprises at least two groups of carbonization tanks; the thickening and pressure filtering unit comprises a thickener, a second hydrocyclone and a pressure filter; the drying unit comprises a drying and scattering machine and a product collector; the feed inlet of the strong magnetic separator is used for inputting carbide slag raw materials, the first discharge outlet of the strong magnetic separator is used for discharging magnetically separated ferrites, the second discharge outlet of the strong magnetic separator is used for outputting the carbide slag raw materials without the ferrites, the second discharge outlet of the strong magnetic separator is communicated with the top feed inlet of the mixing and stirring tank, the bottom discharge outlet of the mixing and stirring tank is communicated with the top feed inlet of the first hydrocyclone, the bottom slag discharge outlet of the first hydrocyclone is used for discharging solid impurities, and the top slurry outlet of the first hydrocyclone is used for discharging carbide slag slurry; the top slurry outlet of the first hydrocyclone is communicated with the top feed inlet of the flotation stirring tank, the bottom discharge outlet of the flotation stirring tank is communicated with the top feed inlet of the flotation machine, the slag discharge port of the flotation machine is used for discharging solid impurities, and the slurry outlet of the flotation machine is used for discharging carbide slag slurry; the slurry outlet of the flotation machine is communicated with the top feed inlet of the carbonization tank, the bottom discharge port of the carbonization tank is used for discharging calcium carbonate slurry, and the top clear liquid outlet of the carbonization tank is communicated with the mixing stirring tank and the top feed inlet of the flotation stirring tank; the bottom discharge port of the carbonization tank is communicated with the top feed port of the thickener, the top clarified liquid outlet of the thickener is communicated with the top feed ports of the mixing stirring tank and the flotation stirring tank, the bottom discharge port of the thickener is communicated with the top feed port of the second hydrocyclone, the top low-concentration slurry outlet of the second hydrocyclone is communicated with the top feed port of the thickener, the bottom high-concentration slurry outlet of the second hydrocyclone is communicated with the feed port of the filter press, the filtrate outlet of the filter press is communicated with the top feed ports of the mixing stirring tank and the flotation stirring tank, the discharge port of the filter press is communicated with the feed port of the drying scattering machine, the discharge port of the drying scattering machine is communicated with the feed port of the product collector, and the discharge port of the product collector is used for discharging the calcium carbonate micropowder.
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| CN202021355966.4U CN212334613U (en) | 2020-07-10 | 2020-07-10 | Utilize carbide slag preparation miropowder calcium carbonate's device |
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| CN202021355966.4U CN212334613U (en) | 2020-07-10 | 2020-07-10 | Utilize carbide slag preparation miropowder calcium carbonate's device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111689509A (en) * | 2020-07-10 | 2020-09-22 | 沈阳鑫博工业技术股份有限公司 | Device and method for preparing micro powder calcium carbonate by using carbide slag |
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- 2020-07-10 CN CN202021355966.4U patent/CN212334613U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111689509A (en) * | 2020-07-10 | 2020-09-22 | 沈阳鑫博工业技术股份有限公司 | Device and method for preparing micro powder calcium carbonate by using carbide slag |
| CN111689509B (en) * | 2020-07-10 | 2023-05-05 | 沈阳鑫博工业技术股份有限公司 | Device and method for preparing micro-powder calcium carbonate by using carbide slag |
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