CN102260511A - Method for producing coke making material extracted from lignite - Google Patents
Method for producing coke making material extracted from lignite Download PDFInfo
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- CN102260511A CN102260511A CN2011101807298A CN201110180729A CN102260511A CN 102260511 A CN102260511 A CN 102260511A CN 2011101807298 A CN2011101807298 A CN 2011101807298A CN 201110180729 A CN201110180729 A CN 201110180729A CN 102260511 A CN102260511 A CN 102260511A
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Abstract
The invention discloses a method for producing a coke making material extracted from lignite, which belongs to the technical field of comprehensive use of coking coal resources. The method comprises: filling a lignite sample into an extractor, and continuously supplying tetrahydronaphthalene by using a high-pressure pump; keeping the pressure in the system above the pressure of the saturated steam of an extraction solvent by using a back pressure valve, raising the temperature to a given temperature at a speed of 5 DEG C/min and keeping the temperature for 90 minutes; leaching the lignite at 150 to 350 DEG C by using tetrahydronaphthalene; dividing the lignite at room temperature into a component which can dissolve in the solvent at room temperature, component precipitating as solid at room temperature and residue which cannot be extracted at 150 to 350 DEG C; and extracting the component precipitating as the solid at normal temperature by using a distillation process in a mixed solvent consisting of methylbenzene, methanol, acetone and tetrahydrofuran, and thus, obtaining a softened and molten component which is used as binding coal to be added into the coke making material. The method has the advantage that the addition of the obtained softened and molten component into the coke making raw material can lower the ash content of the coke and contributes to blast-furnace smelting.
Description
Technical field
The invention belongs to coking coal resource comprehensive utilization technique field, the production method that particularly provides a kind of brown coal to extract the coking raw material can not decomposed brown coal and successfully separated the softening molten component of utilizing as the caking coal that adds in the coke raw material.
Background technology
Continuous expansion along with the iron and steel industry production capacity, coal resources supply day is becoming tight. and transportation by railroad is limited in addition, high-quality coking coal price constantly surging, each big steel factory constantly takes various counter-measures in order to reduce ironmaking cost, and it is noticeable day by day as the technology that coking coal resource is used to develop inferior brown coal.
China's lignite resource is abundant, and the retained reserve that oneself verifies reaches 1,303 hundred million t, accounts for 13% of national coal reserves, and wherein the brown coal reserves maximum in the Inner Mongol accounts for 77% of national brown coal reserves.Brown coal are the minimum coals of degree of coalification, are characterized in the moisture height, proportion is little, volatile matter is high, non-caked, chemical reactivity strong, poor heat stability, thermal value are low, contains the humic acid of different quantities, belongs to non-coking coal.Brown coal partly are used for place of production generating at present, and its utilization rate is lower.If brown coal can be used for coking,, widen coking coal resource with greatly alleviating the problem of coking coal resource anxiety.
In order to expand coking coal resource, the invention provides a kind of brown coal treatment process, this method can not decomposed brown coal and successfully obtained the required softening molten component of coke raw material.The softening molten component that the brown coal extraction obtains is added in the coking raw material, can reduce coke ash, for blast furnace provides high grade coke, and then reduces blast furnace coke ratio.
Summary of the invention
The object of the present invention is to provide a kind of brown coal to extract the production method of coking raw material, expand the material coking coal resource.Needed raw material is chemical solventss such as low grey brown coal, tetralin.
Processing step of the present invention is as follows:
(1) the sample brown coal are packed into extractor, supply with tetralin continuously with high-pressure pump, with back pressure valve the pressure in the extractor is remained on the saturated vapor pressure 10.0～10.1MPa of extraction solvent, be warmed up to 150～350 ℃, keep 90～100min with the speed of 5 ℃/min; Under 150～350 ℃ of high temperature, extract brown coal, brown coal are separated into composition of separating out as solid under the solvable composition of solvent, the room temperature under the room temperature and residue three parts that can not extract under 150～350 ℃ with tetralin.
(2) solid that step (1) the is obtained composition of separating out extracts under 20～25 ℃ of normal temperature with a kind of mixed solvent, mixed solvent is made up of for four kinds toluene, methyl alcohol, acetone, tetrahydrofuran (THF), wherein the volume of toluene percentage composition 20%～30%, methyl alcohol 15%～30%, acetone 20%～30%, tetrahydrofuran (THF) 10%～30% is by extraction, promptly can isolate the softening diverse composition of melt temperature, these compositions can be used as coking raw material instead of part caking coal.
The ash content of selected brown coal is 1.5～20%, and volatile matter 40%～60% is weight percentage.
The softening molten component that brown coal extract does not contain ash content, can reduce coke ash as the coking raw material, improves coke quality.
The ash content of selected brown coal is 1.5～20%, and volatile matter 40%～60% is weight percentage.
The beneficial effect of patent of the present invention is: adopt present method can successfully extract the composition with meltbility in large quantities from brown coal.The various compositions that will obtain from brown coal rationally cooperate, and can be used as the coking raw material, have not only expanded coking coal resource, and can improve coke quality.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Embodiment
With the required material of brown coal production coking raw material be: ash content is less than 20% brown coal, the optional tetralin of brown coal high temperature extraction agent.The granularity of brown coal-200 purpose content requirement is more than 80%.
As shown in Figure 1, with the sample brown coal extractor of packing into, supply with tetralin continuously with high-pressure pump.With back pressure valve intrasystem pressure is remained on more than the saturated vapor pressure of extraction solvent (10.1MPa), be warmed up to 350 ℃ of specified temperature, keep 100min with the speed of 5 ℃/min.Solid in the cooling position extract of separating out before the back pressure valve is reclaimed with strainer, and the liquids recovery by strainer is in wash bottle, and gas recovery is to gas pouch.After keeping finishing, water cools off extractor fast.Through these operations, after the extraction of sample coal, be separated into composition (throw out) of separating out as solid under the solvable composition of solvent (solid), the room temperature under the room temperature and residue three parts that under 350 ℃, can not extract.For the solid composition of separating out of extraction, extract under 20～25 ℃ of normal temperature with a kind of mixed solvent, the solvent evaporation of extraction end relief can obtain the needed softening molten component of coking.Mixed solvent is made up of for four kinds toluene, methyl alcohol, acetone, tetrahydrofuran (THF), and wherein the volume of toluene percentage composition 20%～30%, methyl alcohol 15%～30%, acetone 20%～30%, tetrahydrofuran (THF) 10%～30%.
Table 1 hybrid extraction solvent burden ratio scheme (volumn concentration, %)
More than the softening molten component recovery rate used of the coking that obtains of several schemes to take the mass percent of the solid precipitate of hybrid extraction be 15%～30%.The caking coal that the coking of resulting softening molten component instead of part is used carries out the test of coking shove charge coal, as table 2.The result shows that behind the interpolation brown coal extract 9%, the ash content of coke reduces to 11.6% by 11.9%.
The various proportionings of table 2 shove charge coal (weight percentage)
Experimental result proves, can be used as the coking raw material in the coking raw material adding coking raw material with method of the present invention and the inventive method production, has not only expanded coking coal resource, and can reduce coke ash, helps blast-furnace smelting.
Claims (2)
1. brown coal extract the production method of coking raw material, it is characterized in that processing step is as follows:
(1) the sample brown coal are packed into extractor, supply with tetralin continuously with high-pressure pump, with back pressure valve the pressure in the extractor is remained on the saturated vapor pressure 10.0～10.1MPa of extraction solvent, be warmed up to 150～350 ℃, keep 90～100min with the speed of 5 ℃/min; Under 150～350 ℃ of high temperature, extract brown coal, brown coal are separated into composition of separating out as solid under the solvable composition of solvent, the room temperature under the room temperature and residue three parts that can not extract under 150～350 ℃ with tetralin;
(2) solid that step (1) the is obtained composition of separating out extracts under 20～25 ℃ of normal temperature with a kind of mixed solvent, mixed solvent is made up of for four kinds toluene, methyl alcohol, acetone, tetrahydrofuran (THF), wherein the volume of toluene percentage composition 20%～30%, methyl alcohol 15%～30%, acetone 20%～30%, tetrahydrofuran (THF) 10%～30% is by extraction, isolate the softening diverse composition of melt temperature, these compositions are as coking raw material instead of part caking coal.
2. brown coal according to claim 1 extract the production method of coking raw material, it is characterized in that the ash content of selected brown coal is 1.5～20%, and volatile matter 40%～60% is weight percentage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101807298A CN102260511A (en) | 2011-06-30 | 2011-06-30 | Method for producing coke making material extracted from lignite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101807298A CN102260511A (en) | 2011-06-30 | 2011-06-30 | Method for producing coke making material extracted from lignite |
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| CN102260511A true CN102260511A (en) | 2011-11-30 |
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| CN2011101807298A Pending CN102260511A (en) | 2011-06-30 | 2011-06-30 | Method for producing coke making material extracted from lignite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582058A (en) * | 2016-12-20 | 2017-04-26 | 山东京博石油化工有限公司 | Method for separating soluble organic matters from petroleum coke |
| CN106715652A (en) * | 2014-10-07 | 2017-05-24 | 株式会社神户制钢所 | Method for deciding blending amount of ash-free coal, and process for producing coke for blast furnace |
-
2011
- 2011-06-30 CN CN2011101807298A patent/CN102260511A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106715652A (en) * | 2014-10-07 | 2017-05-24 | 株式会社神户制钢所 | Method for deciding blending amount of ash-free coal, and process for producing coke for blast furnace |
| CN106582058A (en) * | 2016-12-20 | 2017-04-26 | 山东京博石油化工有限公司 | Method for separating soluble organic matters from petroleum coke |
| CN106582058B (en) * | 2016-12-20 | 2018-10-30 | 山东京博石油化工有限公司 | A method of separation petroleum coke Soluble Organic Matter |
| US10793779B2 (en) | 2016-12-20 | 2020-10-06 | Shandong Chambroad Petrochemicals Co., Ltd. | Method for separating soluble organic matter in petroleum coke |
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Application publication date: 20111130 |