CN116731737A - Coke oven adding cold rolling emulsion oil sludge coking process - Google Patents
Coke oven adding cold rolling emulsion oil sludge coking process Download PDFInfo
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- CN116731737A CN116731737A CN202310800924.9A CN202310800924A CN116731737A CN 116731737 A CN116731737 A CN 116731737A CN 202310800924 A CN202310800924 A CN 202310800924A CN 116731737 A CN116731737 A CN 116731737A
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- emulsion
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- rolled
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- 239000000839 emulsion Substances 0.000 title claims abstract description 140
- 239000010802 sludge Substances 0.000 title claims abstract description 120
- 238000004939 coking Methods 0.000 title claims abstract description 93
- 239000000571 coke Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000005097 cold rolling Methods 0.000 title claims description 34
- 239000003245 coal Substances 0.000 claims abstract description 65
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 13
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 18
- 238000004458 analytical method Methods 0.000 description 12
- 239000000047 product Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000002956 ash Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000000197 pyrolysis Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/045—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing mineral oils, bitumen, tar or the like or mixtures thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of industrial waste treatment methods, in particular to a coking process for adding cold-rolled emulsion sludge into a coke oven, which comprises the following steps: fully mixing the cold-rolled emulsion oil sludge and coking coal according to a certain proportion to obtain emulsion mixed sludge, wherein the moisture content of the cold-rolled emulsion oil sludge is 25% -30%, and the moisture content of the coking coal is 22% -27%; step two: and (3) conveying the emulsion mixed mud obtained in the step (A) to a coke oven for coking to obtain the composite coke. According to the invention, the cold-rolled emulsion oil sludge is mixed with the coking coal to form the emulsion mixed sludge, and the emulsion mixed sludge is used for coking, so that the cold-rolled emulsion oil sludge is reused in a steel plant, and the treatment process flow and the treatment cost of the cold-rolled emulsion oil sludge are obviously simplified.
Description
Technical Field
The invention relates to the technical field of industrial waste treatment methods, in particular to a coking process for adding cold-rolled emulsion sludge into a coke oven.
Background
At present, the total amount of various oily sludge produced in China every year reaches more than 1000 ten thousand tons, wherein the oily sludge produced in the steel industry accounts for more than 30 percent. The oil-containing sludge produced in the steel industry is mainly produced in steel casting blanks and rolling, and in the steel cold rolling process, the emulsion is used for cooling and lubricating the rolled steel blanks so as to reduce rolling force, prolong the service life of rollers and control the surface quality of strip steel. Part of scrap iron and solid impurities can fall off in the cold rolling process of the steel billet, and emulsion liquid oil sludge is formed by doping the scrap iron and the solid impurities.
The emulsion oil sludge contains a large amount of mixtures of mineral oil and water, scrap iron and suspended solid impurities, and has the characteristics of difficult degradation, high pollution and strong adhesiveness, so that if the emulsion oil sludge is directly discharged into the environment, the water quality can be seriously polluted, the environment and even the health of human beings are threatened, and the serious waste of useful resources can be caused.
The existing method for treating the emulsion sludge mainly comprises two main types, wherein the first type is to mix and shape the emulsion sludge with industrial solid wastes such as fly ash with low water content to prepare powdery particles or molded coal which can be fully combusted as fuel. Although the treatment method can realize the reutilization of the waste emulsion sludge to a certain extent, the output product is powdery particles, dust is easy to occur to cause air pollution, and metal elements such as iron and the like in the emulsion sludge cannot be recycled. The second is to demulsify the emulsified liquid sludge and separate and purify the water in the emulsified liquid sludge. Although the treatment method does not produce air pollution, the treatment focus is to purify the water quality in the emulsion sludge, and the insoluble sludge and the sludge containing metal elements such as iron are intensively treated only by adopting a way of dewatering into solid, so that the problem of recycling the metal elements such as iron in the emulsion sludge still cannot be solved.
Disclosure of Invention
Aiming at the technical problem that the recovery rate of metal elements such as iron in emulsion sludge is not high in the prior art, the invention provides a coking process for adding cold-rolled emulsion sludge into a coke oven, which applies the emulsion sludge to the coking process and improves the recovery rate of metal elements such as iron.
The invention provides a coking process for adding cold-rolled emulsion sludge into a coke oven, which comprises the following steps:
step one: fully mixing the cold-rolled emulsion oil sludge and coking coal according to a certain proportion to obtain emulsion mixed sludge, wherein the moisture content of the cold-rolled emulsion oil sludge is 25-30% by mass, and the moisture content of the coking coal is 22-27% by mass. Step two: and (3) conveying the emulsion mixed mud obtained in the step (A) to a coke oven for coking through a conveyor, wherein the conveyor is preferably a belt conveyor, so as to obtain the composite coke. Because the water content of the emulsion mixed mud is relatively high, dust can not be generated in the transportation process, therefore, a non-closed conveyor can be used, and the belt conveyor is convenient to clean and maintain, so that the labor is saved.
Further, the mass ratio of the cold rolling emulsion sludge to the coking coal is 0.1-2:100.
Further, the mass ratio of the cold rolling emulsion sludge to the coking coal is preferably 0.5-1:100. When the mass ratio of the cold-rolled emulsion sludge to the coking coal is not more than 1:100, the properties of the cold-rolled emulsion sludge such as thermal reactivity (CRI) to coke, strength after reaction (CSR), ash (Ad), dry volatile matters (Vd), sulfur content (St, d), crushing strength (M40), wear resistance (M10) and the like are not adversely affected. In addition, the discharge amount of the cold-rolled emulsion sludge is obviously smaller than the consumption amount of coking coal, and the mass ratio of the cold-rolled emulsion sludge to the coking coal is set to be 0-1:100, so that the residual amount of the cold-rolled emulsion sludge can be reduced as much as possible, and the coking coal resource is utilized to the greatest extent.
Further, the cold-rolled emulsion sludge includes iron-containing emulsion sludge discharged during cold rolling and/or cleaning after cold rolling. During cold rolling and/or cleaning after cold rolling of the steel sheet, iron powder and/or iron oxide powder generated by friction between the roller and the steel material enter the emulsion. When the iron content in the emulsion is low, the emulsion has a good lubricating effect, but when the iron content in the emulsion is too high, the color of the emulsion is blackened to influence the cleaning of the steel plate surface, so that the emulsion with the too high iron content can be replaced by a new emulsion.
Further, the cold-rolled emulsion sludge is directly conveyed to a mixed coal belt conveyor through a screw conveying pump, the adding amount of the cold-rolled emulsion sludge is controlled through an adjusting device, and the adjusting device is preferably a flow pump. The cold-rolled emulsion oil sludge which is quantitatively added and coking coal on a coal mixing belt conveyor are conveyed into a double-shaft stirrer to be stirred and mixed. On the one hand, a screw conveying pump for conveying cold-rolled emulsion sludge, a coal mixing belt conveyor and a double-shaft stirrer for mixing the cold-rolled emulsion sludge and coking coal are all common equipment for steel mills, so that the high-value utilization of inherent equipment is facilitated. On the other hand, the conveying and humidifying of the coking coal are the essential technological processes in the coking process, the cold-rolled emulsion oil sludge is conveyed to a mixing coal belt conveyor for conveying the coking coal, and the cold-rolled emulsion oil sludge and the coking coal on the mixing coal belt conveyor are conveyed into a double-shaft stirrer together for stirring and mixing, so that the premixing of the cold-rolled emulsion oil sludge and the coking coal on the mixing coal belt conveyor and the full mixing in the double-shaft stirrer can be realized, the humidifying of the coking coal can be promoted by utilizing the cold-rolled emulsion oil sludge, the treatment technological process of the cold-rolled emulsion oil sludge is almost synchronous with the treatment technological process of the coking coal, and the energy consumption and the cost for treating the cold-rolled emulsion oil sludge and the coking coal are saved.
Further, the emulsion blending slurry is stored in a coal bunker prior to coking.
Further, the composite coke is used for blast furnace smelting.
Further, both the first step and the second step are performed by using existing coking process equipment.
The invention has the beneficial effects that:
first, in the coking process, the invention mixes cold-rolled emulsion sludge with coking coal to form emulsion mixed sludge, and uses the emulsion mixed sludge for coking. The technical proposal remarkably simplifies the treatment process flow of the cold-rolled emulsion sludge and reduces the treatment cost, so that the cold-rolled emulsion sludge can be reused in steel plants.
Secondly, in the aspect of selecting coking raw materials, the cold-rolled emulsion sludge used in the invention is original emulsion sludge which is not dehydrated, and a certain water content endows the cold-rolled emulsion sludge with obvious fluidity, so that the cold-rolled emulsion sludge is beneficial to being dispersed in coking coal. The cold rolling emulsion sludge also comprises 10-15% of ash and 55-60% of volatile matters by mass percent. Coking coal is bituminous coal with certain cohesiveness and can be used for producing coke. The water in the coking coal and the cold-rolled emulsion sludge can adhere powdery particles in the coking coal and the cold-rolled emulsion sludge together, so that on one hand, air pollution and raw material waste caused by blowing away of air flow in the transportation and coking processes of the powdery particles can be avoided; on one hand, the wind resistance of a fire hole can be increased, which is beneficial to forming a relatively flat fire bed and promoting combustion; on the other hand, the volatile separation of coking coal and cold-rolled emulsion oil sludge in the coking process can be promoted by the existence of moisture, and the quick ignition is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of a coking process of adding cold-rolled emulsion sludge to a coke oven in example 1 of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The equipment used in the embodiment and the comparative example comprises an electrothermal blowing drying oven 101-1AB, a sulfur determination instrument YX-DL8300, an infrared hydrocarbon nitrogen element analyzer YX-CHN5510, an atomic fluorescence spectrophotometer AFS-230E and an atomic absorption spectrophotometer AA-7003. The first step and the second step are carried out by utilizing the existing coking process equipment.
Example 1
A coke oven adding cold rolling emulsion sludge coking process comprises the following steps:
step one: and (3) directly conveying 1 ton of cold-rolled emulsion sludge discharged in the cold rolling and cleaning process after cold rolling to a mixed coal belt conveyor by using a screw conveying pump, conveying 200 tons of coking coal on the mixed coal belt conveyor into a double-shaft stirrer together, and stirring and mixing to obtain emulsion mixed sludge, wherein the moisture content of the cold-rolled emulsion sludge is 26% by mass and the moisture content of the coking coal is 27% by mass. The cold rolling emulsion sludge also comprises 14% of ash and 60% of volatile matters by mass. The resulting emulsion mud mixture is stored in a coal bunker prior to coking.
Step two: and (3) conveying the emulsion mixed mud obtained in the step (A) into a coke oven by using a belt conveyor for coking, wherein the coking condition is conventional and the same as the condition of not adding cold rolling emulsion oil mud, the emulsion mixed mud is coked to obtain composite coke, sampling the composite coke for quality analysis, and the rest of the composite coke is used for blast furnace smelting.
Example 2
A coke oven adding cold rolling emulsion sludge coking process comprises the following steps:
step one: and 2 tons of cold-rolled emulsion sludge discharged in the cold rolling and cleaning process after the cold rolling are directly conveyed to a mixed coal belt conveyor by using a screw conveying pump, and are conveyed into a double-shaft stirrer to be stirred and mixed together with 200 tons of coking coal on the mixed coal belt conveyor, so that emulsion mixed sludge is obtained, wherein the moisture content of the cold-rolled emulsion sludge is 31% by mass and the moisture content of the coking coal is 26% by mass. The cold rolling emulsion sludge also comprises 10.1% of ash and 58.9% of volatile matters by mass. The resulting emulsion mud mixture is stored in a coal bunker prior to coking.
Step two: and (3) conveying the emulsion mixed mud obtained in the step (A) into a coke oven by using a belt conveyor for coking, wherein the coking condition is conventional and the same as the condition of not adding cold rolling emulsion oil mud, the emulsion mixed mud is coked to obtain composite coke, sampling the composite coke for quality analysis, and the rest of the composite coke is used for blast furnace smelting.
Example 3
A coke oven adding cold rolling emulsion sludge coking process comprises the following steps:
step one: and 2 tons of cold-rolled emulsion sludge discharged in the cold rolling and cleaning process after the cold rolling are directly conveyed to a mixed coal belt conveyor by using a screw conveying pump, and are conveyed into a double-shaft stirrer to be stirred and mixed together with 100 tons of coking coal on the mixed coal belt conveyor, so that emulsion mixed sludge is obtained, wherein the moisture content of the cold-rolled emulsion sludge is 29.8% by mass and the moisture content of the coking coal is 23% by mass. The cold rolling emulsion sludge also comprises 13.2% of ash and 57% of volatile matters by mass. The resulting emulsion mud mixture is stored in a coal bunker prior to coking.
Step two: and (3) conveying the emulsion mixed mud obtained in the step (A) into a coke oven by using a belt conveyor for coking, wherein the coking condition is conventional and the same as the condition of not adding cold rolling emulsion oil mud, the emulsion mixed mud is coked to obtain composite coke, sampling the composite coke for quality analysis, and the rest of the composite coke is used for blast furnace smelting.
Examples 1-3 the cold rolled emulsion sludge was treated using a coke oven plus cold rolled emulsion sludge coking process, which can save about 3330 yuan per ton of cold rolled emulsion sludge.
Comparative example 1
A coking process without adding cold rolling emulsion sludge comprises the following steps:
step one: 200 tons of coking coal are conveyed into a double-shaft stirrer by using a coal mixing belt conveyor to be stirred and then stored in a coal bunker. The moisture content of the coking coal is 26% by mass.
Step two: and (3) conveying the coking coal obtained in the step one into a coke oven by using a belt conveyor for coking under the conventional condition to obtain coke, sampling the coke for quality analysis, and using the rest coke for blast furnace smelting.
The results of the performance analysis of the composite cokes obtained in examples 1 to 3 and the coke obtained in comparative example 1 are shown in Table 1, wherein the addition ratio in Table 1 is the ratio of the cold-rolled emulsion sludge to the coking coal, and the coke performance analysis method adopts a Coulomb titration method.
TABLE 1 Coke Performance index at different blending ratios
| Sequence number | Proportion of the components | CRI(％) | CSR(％) | Ad(％) | Vd(％) | St，d(％) |
| Comparative example 1 | 0％ | 47.38 | 19.92 | 12.38 | 0.96 | 0.87 |
| Example 1 | 0.5％ | 46.9 | 19.79 | 12.35 | 1.78 | 1.05 |
| Example 2 | 1％ | 47.08 | 19.70 | 12.71 | 1.00 | 0.98 |
| Example 3 | 2％ | 46.92 | 18.83 | 12.84 | 1.21 | 1.03 |
As is clear from table 1, when the coking coal was blended with the cold-rolled emulsion slurry at a blending ratio of 0.5%, 1% and 2%, the thermal reactivity (CRI), the strength after reaction (CSR), the ash (Ad), the dry matter volatile (Vd), the sulfur content (St, d) and the like of the obtained composite coke were similar to those of the coking coal not blended with the cold-rolled emulsion slurry. The coke oven disclosed by the invention can be used for adding the cold-rolled emulsion sludge for coking, so that the cold-rolled emulsion sludge can be consumed on the premise of not affecting the quality of the composite coke.
The analysis results of the cracked products of the cold-rolled emulsion sludge at high temperature are shown in tables 2 and 3, wherein table 2 is the analysis result of the component types and the corresponding mass percentages of the cracked solid products, and table 3 is the analysis result of the component types and the corresponding mass percentages of the cracked gaseous products. The experimental conditions for analysis of the cleavage products were as follows: cracking the cold-rolled emulsion sludge in a pyrolysis furnace isolated from air, wherein the cracking temperature is 350-600 ℃, and the heating mode is indirect heating. The solid matters generated by pyrolysis are pyrolysis residues.
TABLE 2 analysis of solid products
As can be seen from Table 2, TFe or Fe 2 O 3 The pyrolysis slag of the cold-rolled emulsion sludge accounts for 75.71% by mass, the pyrolysis slag of the cold-rolled emulsion sludge accounts for 20.1% by mass, and the coking process of adding the cold-rolled emulsion sludge into the coke oven has important significance for recycling elements such as iron and carbon in the emulsion sludge, and does not produce a large amount of toxic substance residues when adding the cold-rolled emulsion sludge for coking.
TABLE 3 analysis of gaseous products
As shown in table 3, in the gaseous products generated after the cracking of the cold-rolled emulsion sludge, the hydrogen accounts for 54.686% by mass and the carbon dioxide accounts for 27.585% by mass, and the gaseous products generated after the cracking of the cold-rolled emulsion sludge are mainly composed of hydrogen and carbon dioxide, so that the cracked gaseous products are also safe.
Therefore, the coke oven with the cold-rolled emulsion sludge coking process disclosed by the invention can realize recycling of the cold-rolled emulsion sludge on the premise of ensuring the performance and safety of composite coke.
Although the present invention has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims.
Claims (8)
1. A coking process for adding cold-rolled emulsion sludge into a coke oven is characterized by comprising the following steps:
step one: fully mixing the cold-rolled emulsion oil sludge and coking coal according to a certain proportion to obtain emulsion mixed sludge, wherein the moisture content of the cold-rolled emulsion oil sludge is 25% -30%, and the moisture content of the coking coal is 22% -27%;
step two: and (3) conveying the emulsion mixed mud obtained in the step (A) to a coke oven for coking to obtain the composite coke.
2. The coke oven with cold-rolled emulsion sludge coking process according to claim 1, wherein the mass ratio of the cold-rolled emulsion sludge to the coking coal is 0.1-2:100.
3. The coke oven with cold-rolled emulsion sludge coking process according to claim 2, wherein the mass ratio of the cold-rolled emulsion sludge to the coking coal is 0.5-1:100.
4. A coke oven with cold rolling emulsion sludge coking process according to claim 1, characterized in that the cold rolling emulsion sludge comprises iron-containing emulsion sludge discharged during cold rolling and/or cleaning after cold rolling.
5. The coke oven blended cold-rolled emulsion sludge coking process of claim 1, wherein the cold-rolled emulsion sludge is directly conveyed to a mixed coal belt conveyor through a screw conveying pump, and the cold-rolled emulsion sludge and coking coal on the mixed coal belt conveyor are conveyed to a double-shaft stirrer to be stirred and mixed.
6. A coke oven with cold rolling emulsion sludge coking process as claimed in claim 1, wherein emulsion blending sludge is stored in a coal bunker prior to coking.
7. The coke oven with cold rolling emulsion sludge coking process according to claim 1, wherein the composite coke is used for blast furnace smelting.
8. The coke oven with cold rolling emulsion sludge coking process according to claim 1, wherein the first step and the second step are performed by utilizing existing coking process equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310800924.9A CN116731737A (en) | 2023-06-30 | 2023-06-30 | Coke oven adding cold rolling emulsion oil sludge coking process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310800924.9A CN116731737A (en) | 2023-06-30 | 2023-06-30 | Coke oven adding cold rolling emulsion oil sludge coking process |
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| Publication Number | Publication Date |
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| CN116731737A true CN116731737A (en) | 2023-09-12 |
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|---|---|---|---|
| CN202310800924.9A Pending CN116731737A (en) | 2023-06-30 | 2023-06-30 | Coke oven adding cold rolling emulsion oil sludge coking process |
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| Country | Link |
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| CN (1) | CN116731737A (en) |
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- 2023-06-30 CN CN202310800924.9A patent/CN116731737A/en active Pending
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