CN105905905A - Calcium carbide preparation method - Google Patents
Calcium carbide preparation method Download PDFInfo
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- CN105905905A CN105905905A CN201610430260.1A CN201610430260A CN105905905A CN 105905905 A CN105905905 A CN 105905905A CN 201610430260 A CN201610430260 A CN 201610430260A CN 105905905 A CN105905905 A CN 105905905A
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Abstract
The invention discloses a calcium carbide preparation method. The method comprises the steps that carbon containing raw materials, quick lime and an additive are finely ground, so that carbon containing raw material particles, quick lime particles and additive particles are obtained, wherein the additive contains ferric oxide and calcium carbonate; the carbon containing raw material particles, the quick lime particles and the additive particles are mixed, so that a mixed material is obtained; the mixed material is pelleted, so that mixed pellets are obtained; the mixed material is smelted, so that calcium carbide is obtained. Through the method, the smelting reaction temperature and process energy consumption are reduced.
Description
Technical field
The present invention relates to prepare the method for carbide.
Background technology
Carbide formal name used at school Acetylenogen. (CaC2), be important Coal Chemical Industry product and basic chemical industry raw material, mainly for the production of acetylene and
Ethynylation chemical product, the PVC of China more than 70% produces and comes from carbide acetylene, and China's economic development is had very by carbide
Important effect.
Carbide production technology uses block stock and moving-burden bed reactor, and heat-supplying mode has electrothermal way and oxygen full-boiled process two kinds, the most
Use electrothermal way.The most commonly used electrothermal way produces CaC2Detailed process be: by carbon raw material with containing CaO raw material
Mixture adds electric furnace, and utilizing in stove electric arc heated to 2200 DEG C of high temperature to make two kinds of raw materials of addition react, generation is melted produces
Thing carbide (CaC2).The defect of this technique mainly has: one, this technique uses 5-30mm block stock and high arc temperature heating
(2200 DEG C) result in " high temperature, high energy consumption " drawback of current carbide production technology.Two, less than 5mm's in this technique
Raw material goes out of use, and causes the wasting of resources.
Therefore, existing carbide production technology haves much room for improvement.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, it is an object of the present invention to carry
Going out a kind of method preparing carbide, the method is by adding containing ferrum oxide and the additive of calcium carbonate in smelting process, it is achieved
Smelting under cryogenic and produce carbide, and the energy consumption of the method is little, production capacity is high.
According to an aspect of the present invention, the invention provides a kind of method preparing carbide.According to embodiments of the invention, should
Method includes: carbon raw material, quick lime and additive carry out fine grinding process respectively, in order to obtain carbon raw material granule, calculogenesis
Ash particle and additive granules, wherein, described additive contains ferrum oxide and calcium carbonate；By described carbon raw material granule, described
Quicklime particles and described additive granules carry out mixed processing, in order to obtain mixed material；Described mixed material is carried out agglomerating
Process, in order to obtain mixing pelletizing；And described mixed material is carried out metallurgy, in order to obtain carbide.
The method preparing carbide according to embodiments of the present invention, on the one hand by adding containing ferrum oxide and carbonic acid in smelting process
The additive of calcium, it is achieved that smelt under cryogenic and produce carbide, on the other hand, raw material is carried out fine grinding process, improve former
Material specific surface area, increases the contact area of two kinds of raw materials, improves raw material mass transfer and heat transfer efficiency, improves reaction rate, reduces
Carbide smelts reaction temperature and process energy consumption.Additionally, smelting reaction temperature is low, the requirement to equipment thermostability reduces further,
Thus reduce equipment investment cost.
It addition, the method preparing carbide according to the above embodiment of the present invention, it is also possible to have a following additional technical characteristic:
According to embodiments of the invention, described carbon raw material granule, described quicklime particles and the average particle of described additive granules
Footpath is no more than 70 μm.
According to embodiments of the invention, the quality of ferrum oxide and the matter of calcium oxide in described quicklime particles in described additive granules
The ratio of amount is (0.5-20): 100.According to a preferred embodiment of the invention, in described additive granules the quality of ferrum oxide with
In described quicklime particles, the ratio of the quality of calcium oxide is (1-10): 100.
According to embodiments of the invention, the quality of calcium carbonate and the matter of calcium oxide in described quicklime particles in described additive granules
The ratio of amount is (3-50): 100.According to a preferred embodiment of the invention, the quality of calcium carbonate and institute in described additive granules
The ratio of the quality of calcium oxide in quicklime particles of stating is (3-10): 100.
According to embodiments of the invention, the carbon content of described carbon raw material is not less than 40 mass %.Preferred according to the present invention
Embodiment, the carbon content of described carbon raw material is not less than 60 mass %.
According to embodiments of the invention, described quick lime is quick lime.
According to embodiments of the invention, the calcium oxide content of described quick lime is not less than 90 mass %.
According to embodiments of the invention, the method farther includes: before described agglomerating process, after described mixed processing, to institute
State mixed material to carry out moistening mill process, in order to obtain the mixed material after profit mill.
According to embodiments of the invention, the temperature of described metallurgy is 1700-1850 DEG C.
According to embodiments of the invention, described carbon raw material is coal or semi-coke.
The method preparing carbide according to embodiments of the present invention, at least has one of following advantages:
(1) by using profit mill mode that material is processed after levigate for raw material process, improve raw material specific surface area, increase two kinds
The contact area of raw material, improves raw material mass transfer and heat transfer efficiency, improves reaction rate, reduces carbide reaction temperature and technique energy
Consumption.
(2) in smelting process, use containing Fe2O3And the additive of CaO, promote carbide and produce the carrying out of reaction,
Improve carbide quality.
(3) reaction temperature is low, and the requirement to equipment thermostability reduces, thus reduces equipment investment cost.
(4) common coal, semi-coke are as carbon raw material, instead of high cost coke, significantly reduce carbide production cost.
(5) traditional handicraft is abandoned less than the raw material of 5mm, caused the wasting of resources, former in the method for the embodiment of the present invention
Material is obtained by the most completely, reduces cost of material.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become bright from the following description
Aobvious, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage the accompanying drawings below description to embodiment will be apparent from from combining and
Easy to understand, wherein:
Fig. 1 shows the schematic flow sheet of the method preparing carbide according to an embodiment of the invention；
Fig. 2 shows the schematic flow sheet of the method preparing carbide according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical or
Similar label represents same or similar element or has the element of same or like function.Describe below with reference to accompanying drawing
Embodiment is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
It should be noted that term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relatively
Importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", " second " feature permissible
Express or implicitly include one or more this feature.Further, in describing the invention, except as otherwise noted,
" multiple " are meant that two or more.
According to an aspect of the present invention, the invention provides a kind of method preparing carbide.With reference to Fig. 1, according to the present invention's
Embodiment, explains the method, and the method includes:
S100 fine grinding processes
According to embodiments of the invention, carbon raw material, quick lime and additive are carried out respectively fine grinding process, obtains carbon raw material
Granule, quicklime particles and additive granules, wherein, additive contains ferrum oxide and calcium carbonate.Thus, on the one hand pass through
Raw materials for metallurgy adds containing ferrum oxide and the additive of calcium carbonate, it is achieved that smelt under cryogenic and produce carbide, the opposing party
Face, by raw material carries out fine grinding process, improves raw material specific surface area, increases the contact area of two kinds of raw materials, improves raw material and passes
Matter and heat transfer efficiency, improve reaction rate, reduce carbide reaction temperature and process energy consumption.Additionally, smelting reaction temperature is low,
Requirement to equipment thermostability reduces further, thus reduces equipment investment cost.Meanwhile, raw material particle size is little, makes raw material almost
It is obtained by completely, it is to avoid the problem that in traditional handicraft, raw material less than 5mm cannot be applied, reduces cost of material.
Wherein it is desired to explanation, the additive of the embodiment of the present invention, i.e. can be made up of pure ferrum oxide and calcium carbonate, also
Other compound can be contained.
According to a particular embodiment of the invention, the mean diameter of carbon raw material granule, quicklime particles and additive granules is not
More than 70 μm.Inventor finds through numerous studies, when the mean diameter of reaction raw materials is no more than 70 μm, and raw material ratio
Surface area is high, and the contact area of two kinds of raw materials is big, and raw material mass transfer and heat transfer efficiency are high, and reaction rate is fast.Additionally, traditional handicraft
In abandoned less than the raw material of 5mm, cause the wasting of resources, the raw material particle size that the method for the embodiment of the present invention uses is little, makes former
Material is obtained by the most completely, reduces cost of material.
According to embodiments of the invention, in additive, the additional proportion of ferrum oxide is not particularly limited, as long as smelting temperature can be reduced
Spend.According to a particular embodiment of the invention, the quality of ferrum oxide and the matter of calcium oxide in quicklime particles in additive granules
The ratio of amount is (0.5-20): 100.Thus, carbide is smelted the excellent catalytic effect of reaction by additive, and smelting temperature is low, time
Between short, the quality better of carbide.According to a preferred embodiment of the invention, the quality of ferrum oxide and quicklime particles in additive granules
The ratio of the quality of middle calcium oxide is (1-10): 100.Thus, the catalytic effect that carbide is smelted reaction by additive is good, smelts
Temperature is lower, and the time is shorter, and the quality of carbide is more preferably.
According to embodiments of the invention, in additive, the additional proportion of calcium carbonate is not particularly limited, as long as smelting temperature can be reduced
Spend.According to a particular embodiment of the invention, the quality of calcium carbonate and the matter of calcium oxide in quicklime particles in additive granules
The ratio of amount is (3-50): 100.Thus, carbide is smelted the excellent catalytic effect of reaction by additive, and smelting temperature is low, the time
Short, the quality better of carbide.According to a preferred embodiment of the invention, in additive granules in the quality of calcium carbonate and quicklime particles
The ratio of the quality of calcium oxide is (3-10): 100.Thus, the catalytic effect that carbide is smelted reaction by additive is good, smelts temperature
Spending lower, the time is shorter, and the quality of carbide is more preferably.
According to embodiments of the invention, the carbon content of carbon raw material is not particularly limited, as long as generation electricity can be reacted with quick lime
Stone.According to a particular embodiment of the invention, the carbon content of carbon raw material is not less than 40 mass %.Thus, carbon containing is former
The carbon content of material is suitable, and carbide quality is good.According to a preferred embodiment of the invention, the carbon content of carbon raw material is not less than 60
Quality %.Thus, the carbon content of carbon raw material is preferably, and carbide quality is good.
According to embodiments of the invention, carbon raw material is coal or semi-coke, and wherein, coal is common coal.Thus, with coal or orchid
Charcoal, as carbon raw material, instead of the coke of high cost, significantly reduces carbide production cost.
According to a particular embodiment of the invention, quick lime is quick lime.Thus, the reactant activity of carbide reaction is high, promotes electricity
The carrying out of stone reaction, carbide quality better.
According to a particular embodiment of the invention, the calcium oxide content of quick lime is not less than 90 mass %.Thus, the oxygen of quick lime
Changing calcium content high, impurity is few, carbide quality better.
S200 mixed processing
According to embodiments of the invention, carbon raw material granule, quicklime particles and additive granules are carried out mixed processing, obtains
Mixed material.Thus, make reaction raw materials dispersed, the quality better of the carbide prepared.
According to some embodiments of the present invention, the method farther includes: mixed material is carried out agglomerating process, obtains material group
Block.Thus, the particle diameter of raw material is suitable, it is simple to follow-up carry out metallurgy.
The agglomerating process of S300
According to embodiments of the invention, mixed material is carried out agglomerating process, obtain mixing pelletizing.Thus, the grain of raw materials for metallurgy
Footpath is suitable, it is simple to for smelting device.
S400 metallurgy
Mixed material is carried out metallurgy, it is thus achieved that carbide.Utilize this mixed material, it is only necessary to low temperature smelting can prepare excellent
The carbide of matter.According to some embodiments of the present invention, the carbide that profit is obtained by the present invention is that gas forming amount is more than 255L/kg
Solid-state carbide.
According to a particular embodiment of the invention, the temperature of metallurgy is 1700-1850 DEG C.Thus, the temperature of reaction is low, energy
Consumption cost is few.Meanwhile, the requirement to smelting equipment thermostability also reduce further, thus the cost of investment of smelting equipment is lower.
With reference to Fig. 2, according to embodiments of the invention, the method farther includes:
S500 profit mill processes
Before described agglomerating process, after described mixed processing, described mixed material is carried out moistens mill and processes, in order to after obtaining profit mill
Mixed material.By raw material carries out moistening mill process, raising raw material specific surface area, increase the contact area of two kinds of raw materials, carry
High raw material mass transfer and heat transfer efficiency, improve reaction rate, reduce carbide reaction temperature and process energy consumption.
Below with reference to specific embodiment, the present invention will be described, it should be noted that these embodiments are merely illustrative,
And be not considered as limiting the invention.
Embodiment 1
Preparing carbide with quick lime and anthracite for raw material, wherein, in quick lime, CaO content is 93.56%, solid in anthracite
Determining carbon content is 74.80%, and concrete grammar is as follows:
(1) anthracite of quick lime that CaO content is 93.56% and fixed carbon content 74.80% is carried out fine grinding process,
Limestone powder below mean diameter 20 μm and anthracite powder.
(2) limestone powder and anthracite powder are carried out dispensing according to the ratio that mol ratio is 3.0:1 of carbon Yu CaO, with
Time in mixture, allocate fine-graded additive Fe into2O3And fine-graded CaCO3, Fe2O3The amount of allocating into is the 1% of CaO weight,
CaCO3The amount of allocating into is the 3% of CaO weight, is mixed by above-mentioned raw materials.
(3) by mixed raw material profit mill 20min to increase the contact area between fine particle stage material.
(4) on disc balling machine, make the pelletizing of diameter 8-16mm after allocating the material after profit mill into binding agent.
(5) carbide reaction of formation, reaction temperature 1700 DEG C, time 150min are carried out in pelletizing is positioned over high temperature furnace.Reaction
After end, carbide product cools to the furnace take out when 50 DEG C, and recording gas forming amount by carbide gas forming amount determinator is 256L/kg.
Embodiment 2
Preparing carbide with quick lime and semi-coke for raw material, wherein, in quick lime, CaO content is 97.21%, fixed carbon in semi-coke
Content is 81.50%, and concrete grammar is as follows:
(1) semi-coke of quick lime that CaO content is 97.21% and fixed carbon content 81.50% is carried out fine grinding process, obtain
Limestone powder below mean diameter 30 μm and Ramsbottom carbon powder.
(2) limestone powder and Ramsbottom carbon powder are carried out dispensing according to the ratio that mol ratio is 3.2:1 of carbon Yu CaO, simultaneously
Fine-graded additive Fe is allocated in mixture2O3And CaCO3, Fe2O3The amount of allocating into is the 10% of CaO weight, CaCO3
The amount of allocating into is the 10% of CaO weight, is mixed by above-mentioned raw materials.
(3) the oval pelletizing of 32mm × 27mm × 15mm will be pressed into after mixed raw material profit mill at ball press.
(4) carbide reaction of formation, reaction temperature 1800 DEG C, time 120min are carried out in pelletizing is positioned over high temperature furnace.Reaction
After end, carbide product cools to the furnace take out when 40 DEG C, and recording gas forming amount by carbide gas forming amount determinator is 281L/kg.
Embodiment 3
Preparing carbide with quick lime and coal for raw material, wherein, in quick lime, CaO content is 95.2%, and in coal, fixed carbon content is
55%, concrete grammar is as follows:
(1) coal of quick lime that CaO content is 95.2% and fixed carbon content 55% is carried out fine grinding process, obtain average particle
The footpath 70 following material powder of μm.
(2) two kinds of material powders are carried out dispensing according to the ratio that mol ratio is 3.4:1 of C Yu CaO, simultaneously to mixture
In allocate additive Fe into2O3And CaCO3, wherein, Fe2O3The amount of allocating into is the 5% of CaO weight, CaCO3The amount of allocating into is CaO
The 30% of weight, mixes above-mentioned raw materials.
(3) mixed raw material profit is ground ball, in pelletizing is positioned over high temperature furnace, carry out carbide reaction of formation, reaction temperature
1850 DEG C, time 60min, prepare carbide, it is 270L/kg that this carbide measures its gas forming amount.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is not necessarily referred to
Be identical embodiment or example.And, the specific features of description, structure, material or feature can be at any one
Or multiple embodiment or example combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: without departing from this
These embodiments can be carried out multiple change in the case of the principle of invention and objective, revise, replace and modification, the present invention's
Scope is limited by claim and equivalent thereof.
Claims (8)
1. the method preparing carbide, it is characterised in that including:
Carbon raw material, quick lime and additive are carried out fine grinding process, in order to obtain carbon raw material granule, quicklime particles and add
Adding agent granule, wherein, described additive contains ferrum oxide and calcium carbonate, and described carbon raw material is coal or semi-coke；
Described carbon raw material granule, described quicklime particles and described additive granules are carried out mixed processing, in order to mixed
Material；
Described mixed material is carried out agglomerating process, in order to obtain mixing pelletizing；And
Described mixing pelletizing is carried out metallurgy, in order to obtain carbide.
Method the most according to claim 1, it is characterised in that described carbon raw material granule, described quicklime particles and
The mean diameter of described additive granules is no more than 70 μm.
Method the most according to claim 1, it is characterised in that in described additive granules, the quality of ferrum oxide is with described
In quicklime particles, the ratio of the quality of calcium oxide is (0.5-20): 100, it is preferable that for (1-10): 100.
Method the most according to claim 1, it is characterised in that in described additive granules, the quality of calcium carbonate is with described
In quicklime particles, the ratio of the quality of calcium oxide is (3-50): 100, it is preferable that for (3-10): 100.
Method the most according to claim 1, it is characterised in that the carbon content of described carbon raw material is not less than 40 mass %,
Preferably, for not less than 60 mass %.
Method the most according to claim 1, it is characterised in that the calcium oxide content of described quick lime is not less than 90 mass %.
Method the most according to claim 1, it is characterised in that farther include:
Before described agglomerating process, after described mixed processing, described mixed material is carried out moistens mill and processes, in order to after obtaining profit mill
Mixed material.
Method the most according to claim 1, it is characterised in that the temperature of described metallurgy is 1700-1850 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430201A (en) * | 2016-12-02 | 2017-02-22 | 神雾环保技术股份有限公司 | Method for preparing calcium carbide |
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