CN106006642A - Method for producing calcium carbide by powdery calcium oxide - Google Patents
Method for producing calcium carbide by powdery calcium oxide Download PDFInfo
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- CN106006642A CN106006642A CN201610476474.2A CN201610476474A CN106006642A CN 106006642 A CN106006642 A CN 106006642A CN 201610476474 A CN201610476474 A CN 201610476474A CN 106006642 A CN106006642 A CN 106006642A
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- calcium oxide
- carbide
- powdery calcium
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Abstract
The invention discloses a method for producing calcium carbide by powdery calcium oxide. According to the method, forming is performed after powdery calcium oxide and a carbon material are mixed, or the powdery calcium oxide is mixed with a carbon block after independent forming, or the powdery calcium oxide is mixed with the carbon block after formed with small carbon material, and the calcium carbide is produced through reaction in a closed calcium carbide furnace.
Description
Technical field
The present invention relates to a kind of technology utilizing powdery calcium oxide to produce carbide, belong to chemical technology field.
Background technology
The tradition electrothermal way carbide block calcium oxide that in producing, main application limestone thermal decomposition prepares, powdery calcium oxide can cause the poor air permeability in production process, makes operating mode degenerate, it is impossible to produces carbide for electrothermal way.Powdery calcium oxide is shaped to the calcium oxide of certain particle diameter, disadvantages mentioned above will be overcome, expanded the source of carbide raw material.
Summary of the invention
The technical problem to be solved in the present invention: a kind of method providing powdery calcium oxide to produce carbide, solves the deficiency of present technology；The method is by powdery calcium oxide and carbon materials mixing aftershaping, or mixes with carbon block after separately formed for powdery calcium oxide again, or is mixed with carbon block after a small amount of carbon materials molding by powdery calcium oxide again, and in closed calcium carbide furnace, reaction produces carbide.
Technical scheme: a kind of powdery calcium oxide produces the method for carbide, powdery calcium oxide is 1～5:1 mixing aftershaping in mass ratio with carbon materials, or 1～5:1 mix after separately formed for powdery calcium oxide with carbon block being in mass ratio again, or powdery calcium oxide is mixed by the mass ratio 1～5:1 that powdery calcium oxide and carbon materials are total with carbon block with after a small amount of carbon materials molding again, calcium oxide after molding and carbon materials are continuously added the top of furnace of calcium carbide in batches, the most constantly give off carbide in the bottom of furnace of calcium carbide.
Described forming shape is spherical, ellipsoid shape, bar-shaped, square block, other shapes or irregularly block.
Particle diameter after described molding: 70% 3～80mm.
Described powdery calcium oxide can be calcium carbonate, dihydrate gypsum, semi-hydrated gypsum, anhydrous gypsum decompose prepare powdery calcium oxide, and other any production technologies produce powdery calcium oxide, powder pass through 30 mesh standard sieves.
Described powdery calcium oxide contains mass fraction >=80% of calcium oxide.
Described carbon materials is coke, coal, petroleum coke or the mixture between them, other carbon materialses of carbon weight/mass percentage composition >=60%.
Described forming method is: (1) is compressing by tablet machine or other forcing presses by raw material, then passes to steam or the air containing steam or other gas, is finally passed through flue gas, to obtain final product；
Or (2) are compressing by tablet machine or other forcing presses by raw material, then pass to carbon dioxide or the air containing carbon dioxide or other gas, are finally passed through flue gas, to obtain final product；
Or (3) are compressing by tablet machine or other forcing presses by raw material, then pass to the mixed gas containing carbon dioxide and steam, or contain carbon dioxide and the mixing air of steam or other gas, are passed through flue gas, to obtain final product；
Or (4) are compressing by tablet machine or other forcing presses by raw material, then spray water mist, it is passed through flue gas, to obtain final product；
Or raw material sprayed water by (5) in advance, compressing by tablet machine or other forcing presses, then pass to carbon dioxide or the air containing carbon dioxide or other gas, be passed through flue gas, to obtain final product.
Beneficial effects of the present invention: Powder Oxidation calcium is prepared as the calcium oxide particle of certain particle diameter and intensity；The quick lime that the Powder Oxidation calcium replacement decomposition of limestone that Gypsum Fibrosum and industry by-product gypsum can be used to produce sulphuric acid by-product prepares is to produce carbide; realize the recycling of industry by-product gypsum; not only open up the source of carbide raw material; and the industry for many by-product gypsums solves trouble and worry; effective utilization of resource can be accomplished, also help environment and ecological protection simultaneously.Concrete by powdery calcium oxide and carbon materials mixing aftershaping, or mix with carbon block again after separately formed for powdery calcium oxide, or powdery calcium oxide is mixed with carbon block after a small amount of carbon materials molding again, it is continuously added the top of furnace of calcium carbide in batches, the most constantly gives off carbide in the bottom of furnace of calcium carbide.
Detailed description of the invention:
Embodiment one:
By globulate after the powdery calcium oxide of 100 parts and 40 parts of anthracites, 10 parts of coke mixing, particle diameter 50mm；Molding particularly as follows: Powder Oxidation calcium, anthracite and coke mixing after, ball-type it is pressed in pressure forming machine, make its a diameter of 50mm, it is passed through 110 DEG C of air containing 20% steam, take out after 20 minutes, put into drying tower, be passed through the flue gas of 950 DEG C, take out after 20 minutes, be i.e. prepared as the granular of about 50mm.
Said mixture adds the top of furnace of calcium carbide by 1 time/half an hour, reacts in sealed furnace under the effect of electric arc；Reaction temperature 1800-2300 DEG C；Within every 1 hour, the bottom discharge at furnace of calcium carbide goes out 1 carbide.
Embodiment two:
By separately formed for the powdery calcium oxide of 100 parts, particle diameter 50mm, mix with the coke of 80 parts of particle diameter 50mm；Molding is particularly as follows: by 100 mesh-200 mesh Powder Oxidation calcium, ball-type it is pressed in pressure forming machine, make its a diameter of 50mm, it is passed through 110 DEG C containing 10% steam and the air of 10% carbon dioxide, take out after 20 minutes, put into drying tower, be passed through the flue gas of 950 DEG C, taking out after 20 minutes, Powder Oxidation calcium is i.e. prepared as the granular calcium oxide of about 50mm；
Said mixture adds the top of furnace of calcium carbide by 1 time/half an hour, reacts in sealed furnace under the effect of electric arc；Reaction temperature 1800-2300 DEG C；Within every 1 hour, the bottom discharge at furnace of calcium carbide goes out 1 carbide.
Embodiment three:
By glomeration after the powdery calcium oxide of 100 parts and 10 parts of petroleum coke mixing, particle diameter 50mm, the petroleum coke with 30 parts mixes the most again；Molding, particularly as follows: Powder Oxidation calcium and petroleum coke are mixed, is pressed into ball-type so that it is a diameter of 50mm in pressure forming machine, it is passed through the steam of 105 DEG C, takes out after 5 minutes, put into drying tower, it is passed through the flue gas of 950 DEG C, takes out after 20 minutes, be i.e. prepared as the granular of about 50mm；
Said mixture adds the top of furnace of calcium carbide by 1 time/half an hour, reacts in sealed furnace under the effect of electric arc；Reaction temperature 1800-2300 DEG C；Within every 1 hour, the bottom discharge at furnace of calcium carbide goes out 1 carbide.
Claims (7)
1. the method producing carbide with powdery calcium oxide, it is characterized in that: powdery calcium oxide is 1～5:1 mixing aftershaping in mass ratio with carbon materials, or 1～5:1 mix after separately formed for powdery calcium oxide with carbon block being in mass ratio again, or powdery calcium oxide is mixed by the mass ratio 1～5:1 that powdery calcium oxide and carbon materials are total with carbon block with after a small amount of carbon materials molding again, calcium oxide after molding and carbon materials are continuously added the top of furnace of calcium carbide in batches, the most constantly give off carbide in the bottom of furnace of calcium carbide.
Powdery calcium oxide the most according to claim 1 produces the method for carbide, it is characterised in that: described forming shape is spherical, ellipsoid shape, bar-shaped, square block, other shapes or irregularly block.
Powdery calcium oxide the most according to claim 1 produces the method for carbide, it is characterised in that: particle diameter after molding: 70% 3～80mm.
Powdery calcium oxide the most according to claim 1 produces the method for carbide, it is characterized in that: described powdery calcium oxide can be calcium carbonate, dihydrate gypsum, semi-hydrated gypsum, anhydrous gypsum decompose prepare powdery calcium oxide, and the powdery calcium oxide that other any production technologies produce, powder passes through 30 mesh standard sieves.
Powdery calcium oxide the most according to claim 1 produces the method for carbide, it is characterised in that: powdery calcium oxide contains mass fraction >=80% of calcium oxide.
Powder powdery calcium oxide the most according to claim 1 produces the method for carbide, it is characterised in that: described carbon materials is coke, coal, petroleum coke or the mixture between them, other carbon materialses of carbon weight/mass percentage composition >=60%.
Powder powdery calcium oxide the most according to claim 1 produces the method for carbide, it is characterized in that: forming method is: (1) is compressing by tablet machine or other forcing presses by raw material, then pass to steam or the air containing steam or other gas, finally it is passed through flue gas, to obtain final product；
Or (2) are compressing by tablet machine or other forcing presses by raw material, then pass to carbon dioxide or the air containing carbon dioxide or other gas, are finally passed through flue gas, to obtain final product；
Or (3) are compressing by tablet machine or other forcing presses by raw material, then pass to the mixed gas containing carbon dioxide and steam, or contain carbon dioxide and the mixing air of steam or other gas, are passed through flue gas, to obtain final product；
Or (4) are compressing by tablet machine or other forcing presses by raw material, then spray water mist, it is passed through flue gas, to obtain final product；
Or raw material sprayed water by (5) in advance, compressing by tablet machine or other forcing presses, then pass to carbon dioxide or the air containing carbon dioxide or other gas, be passed through flue gas, to obtain final product.
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| CN1046550A (en) * | 1990-01-16 | 1990-10-31 | 福建省化学工业科学技术研究所 | The production technique of lime carbonation egg-shaped briquet |
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Application publication date: 20161012 |