WO1983003619A1 - Process for deashing coal - Google Patents
Process for deashing coal Download PDFInfo
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- WO1983003619A1 WO1983003619A1 PCT/JP1982/000120 JP8200120W WO8303619A1 WO 1983003619 A1 WO1983003619 A1 WO 1983003619A1 JP 8200120 W JP8200120 W JP 8200120W WO 8303619 A1 WO8303619 A1 WO 8303619A1
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- WO
- WIPO (PCT)
- Prior art keywords
- coal
- oxidizing gas
- pulverized coal
- ash particles
- particles
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
Definitions
- the present invention relates to a method for demineralizing coal, and more particularly to a method for efficiently separating ⁇ components mixed in pulverized coal to obtain pulverized coal with high purity.
- pulverized coal is carbon particles, in which particles such as SiO 2 , CaO, and AI 2 O 3, that is, ash particles, are mixed as foreign matter.
- particles such as SiO 2 , CaO, and AI 2 O 3
- pulverized coal is put into water. The ash is separated and removed using the lipophilicity of the carbon particles, but the workability is poor with this method. Is difficult to adjust.
- An object of the present invention is to provide a method of demineralizing coal which has good workability and can easily adjust the ash separation accuracy.
- the present invention transports pulverized coal as an object to be treated in a stream of non-oxidizing gas, and operates the temperature and humidity of the non-oxidizing gas loaded with pulverized coal during operation.
- the ash particles are collected and separated by the difference in the intrinsic resistance of the carbon particles and the ash particles in the electrostatic precipitator, and the dry ash is collected.
- a method for demineralizing coal that expects to obtain high-purity pulverized coal on a non-oxidizing gas at a dust chamber outlet.
- any of carbon dioxide gas, nitrogen gas and inert gas, or any combination thereof can be used O
- the temperature and humidity of the non-oxidizing gas loaded with pulverized coal should not be preferably adjusted so as to increase the efficiency of separation of ash particles, for example, 10% and 100 ⁇ respectively. Adjust to 200 ° C.
- the drawing is a schematic configuration diagram showing a coal processing system for effectively implementing the present invention.
- (1) is a storage tank in which the coal to be treated is charged, and ( 2 ) is a storage tank (1).
- Dry electric dust collector installed downstream
- ( 3 ) is a carry-out passage from dry electricity (2)
- (4) is a blower interposed in the carry-out passage (3)
- (5) is a dry electric dust collector (2)
- (6) is a quantitative cut-out device arranged at the cut-out opening of the storage tank (1)
- ( 7) and (8) are the temperature control device and humidity control device installed in the carry-in passage (5), respectively.
- the loading passage (from one end of the storage tank (1) side of 5), carbon dioxide and nitrogen A medium from a non-oxidizing gas such as gas or inert gas is supplied.
- Arrow A in the figure indicates the flow of the medium, and pulverized coal that is continuously and quantitatively cut out from the storage tank (1) by the quantitative cutout device (6) is mixed with this medium.
- the pulverized coal is transported to the dust collecting chamber of the dry electric dust collector on the medium drawn by the blower ( 4 ), and the temperature controller (7) is located at a position before the dry electric dust collector (2).
- the temperature of the medium is adjusted to a predetermined temperature by a humidifier, and the humidity of the medium is increased by, for example, 10% or more by a humidity controller (8), and the medium is carried into the dust collection chamber.
- the specific resistance of carbon particles is generally / 0 (: ⁇ 10 4 [1'111], which is a low specific resistance, whereas the specific resistance Pa of ash particles is generally 10 4
- the specific resistance of the ash particles is minimum at about 50 to 60 ° C.) It increases with increasing temperature, reaches a maximum at about 100 to 200 ° C, and gradually decreases at higher temperatures. Temperature control
- the efficiency of collecting the ash particles in the dry dust (2) is improved by adjusting the temperature of the medium so that the ash particles are large (the specific resistance is reduced).
- the dry electric dust collector (2) can be operated by charging a high voltage, and the humidity of the medium is controlled by the humidity controller (8). Is adjusted and the dry electric precipitator (2) is charged with high voltage for operation. In other words, when the dry type ( 2 ) is operated by applying a high voltage, the electric field strength is higher, and thus the dust collection rate is improved and the ash separation efficiency is improved.
- mold powder coal as an object to be treated is transported in a stream of non-oxidizing gas, and the non-oxidizing gas loaded with pulverized coal during transport is transported.
- the temperature and humidity are adjusted and sent to the dry-type electrostatic precipitator.
- the ash particles are collected and separated in the dust-collecting chamber due to the difference in specific resistance between the carbon particles and the ash particles. Since high-purity pulverized coal with non-oxidizing gas is obtained at the outlet of the electrostatic precipitator, the workability of ash separation and removal is good and the separation accuracy can be easily adjusted.
- the dry electric dust collection chamber is filled with a non-oxidizing gas, ⁇ it is possible to explode even if a discharge phenomenon occurs regardless of whether dust coal enters the dust collection chamber. It can increase the purity of pulverized coal
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Electrostatic Separation (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
A process for deashing coal, which comprises carrying finely pulverized coal using a non-oxidative gas stream (A), adjusting the temperature and humidity of the pulverized coal-carrying non-oxidative gas during carrying, introducing the gas into a dry electric dust-collecting room (2) to capture and separate ash particles based on the difference in intrinsic resistance between carbon particles and ash particles, and recovering highly pure, finely pulverized coal (B) carried on the non-oxidative gas at an outlet (3) of the dry electric dust-collecting room.
Description
明 細 書 Specification
発明の名称 Title of invention
石炭の脱灰方法 Coal demineralization method
技術分野 Technical field
本発明は、 石炭の脱灰方法に関 し、 特に微粉炭中に混在 する ^分を効率 よ く 分離 して純度の高い微粉炭を得るため の方法に関する も のであ る。 TECHNICAL FIELD The present invention relates to a method for demineralizing coal, and more particularly to a method for efficiently separating ^ components mixed in pulverized coal to obtain pulverized coal with high purity.
背景技術 Background art
微粉炭の大部分は炭素粒子であるが、 その中には異物と して S i 02， CaO， A I 2 O3 どの粒子、 すなわち灰分粒子が混 入 している。 微粉炭を燃料と して使用する場合には前記灰 分粒子の混入の割合が少 いほ ど有利と ¾ るため、 従来で は被処理物と しての微粉炭を水の中に投入 して攪拌 し、 粘 結剤と して更に油を投入 して攪拌 し、 炭素粒子の親油性を 利用 して灰分を分離除去 しているが、 こ の方法では作業性 が悪 く ま た分離精度の調節が困難であ る。 Most of the pulverized coal is carbon particles, in which particles such as SiO 2 , CaO, and AI 2 O 3, that is, ash particles, are mixed as foreign matter. When pulverized coal is used as a fuel, the smaller the proportion of the ash particles mixed is, the more advantageous it is. Conventionally, pulverized coal as an object to be treated is put into water. The ash is separated and removed using the lipophilicity of the carbon particles, but the workability is poor with this method. Is difficult to adjust.
発明の開示 · Disclosure of Invention ·
本発明の目的は、 作業性が良 く 、 しか も灰分の分離精度 を容易に調節する こ と がで き る石炭の脱灰方法を提供する こ と にある。 An object of the present invention is to provide a method of demineralizing coal which has good workability and can easily adjust the ash separation accuracy.
本発明はこの 目的達成のために、 被処理物と しての微粉炭 を非酸化性ガスの流れにのせて運搬 し、 運鎩中に微粉炭をの せた非酸化性ガス の温度及び湿度を調節 した後乾式電気集 塵室に送 ]?、 該電気集塵室内で炭素粒子と灰分粒子の固有抵 杭の違いによ って灰分粒子を捕集分離し、 も っ て乾式電気集
塵室出口において非酸化性ガス にの った純度の高い徵粉炭 を得る こ とを待徵とする石炭の脱灰方法を提供する。 In order to achieve this object, the present invention transports pulverized coal as an object to be treated in a stream of non-oxidizing gas, and operates the temperature and humidity of the non-oxidizing gas loaded with pulverized coal during operation. The ash particles are collected and separated by the difference in the intrinsic resistance of the carbon particles and the ash particles in the electrostatic precipitator, and the dry ash is collected. Provided is a method for demineralizing coal that expects to obtain high-purity pulverized coal on a non-oxidizing gas at a dust chamber outlet.
非酸化性ガス と しては炭酸ガス、 窒素ガス及び不活性ガ ス のいずれか、 又はこれ ら を任意に組合せた も のを使用す る こ とがで き る O As the non-oxidizing gas, any of carbon dioxide gas, nitrogen gas and inert gas, or any combination thereof can be used O
徵粉炭をのせた非酸化性ガス の温度及び湿度は、 灰分粒 子の分離効率が高ま る よ う に調節するのが好ま しいのはい う ま でも な く 、 例えば、 それぞれ 10 %及び 100 〜 200 °Cに 調節する。 温度 The temperature and humidity of the non-oxidizing gas loaded with pulverized coal should not be preferably adjusted so as to increase the efficiency of separation of ash particles, for example, 10% and 100 ~ respectively. Adjust to 200 ° C.
本発明の特徵と効果は、 以下添付図面に基づいて説明す る実施例よ 明確に ¾ る であろ う 。 The features and effects of the present invention will be clearly understood from the embodiments described below with reference to the accompanying drawings.
図面の箇単 説明 Description of drawing
図面は本発明を効果的に実施するための石炭処理シ ステ ムを示す概略構成図である。 The drawing is a schematic configuration diagram showing a coal processing system for effectively implementing the present invention.
発明を実施するための最良の様 BEST MODE FOR CARRYING OUT THE INVENTION
本発明を実施するための石炭 ( 微粉炭 ） 処理シ ス テ ムを 示す図面に ^て、 (1)は処理する徽粉炭が投入されている 貯留槽、 （2)は貯留槽 (1)の下流に配設された乾式電気集塵機、 (3)は乾式電気 (2)からの搬出通路、 （4)は搬出通路（3)に 介装された送風機、 (5)は乾式電気集塵機（2)の掇入口 と前記 貯留槽（1)の切出 し口 と をつな ぐ撿入通路、 （6)は貯留槽（1)の 切出 し口に配 ¾された定量切出 し装置、 （7)及び（8)はそれぞ ， れ搬入通路（5)に配設された温度調節装置及び湿度調節装置 In the drawings showing a coal (pulverized coal) treatment system for carrying out the present invention, (1) is a storage tank in which the coal to be treated is charged, and ( 2 ) is a storage tank (1). Dry electric dust collector installed downstream, ( 3 ) is a carry-out passage from dry electricity (2), (4) is a blower interposed in the carry-out passage (3), (5) is a dry electric dust collector (2) An inlet passage connecting the inlet of the storage tank (1) with the cut-out opening of the storage tank (1), (6) is a quantitative cut-out device arranged at the cut-out opening of the storage tank (1), ( 7) and (8) are the temperature control device and humidity control device installed in the carry-in passage (5), respectively.
める。 Confuse.
搬入通路（5 の貯留槽（1)側の一端か らは炭酸ガス 、 窒素ガ
ス、 不活性ガス どの非酸化性ガス か ら る媒体が供給 さ れる。 図中矢印 Aは前記媒体の流れを示 し、 この媒体に前 記定量切出 し装置（6)に よ つ て貯留槽（1)から連続的に定量づ つ切出 される微粉炭を混合 し、 前記送風機（4)に引かれる媒 体にの っ て微粉炭を乾式電気集塵機 の集塵室に向 っ て運 搬 し、 乾式電気集塵機（2)の手前位置で温度調節装置（7)に よ つ て所定温度に調節 し、 湿度調節装置（8)に よ っ て媒体の水 分が例えば 10%以上にな る よ う 加湿 し、 そ して前記集塵室 に搬入される。 The loading passage (from one end of the storage tank (1) side of 5), carbon dioxide and nitrogen A medium from a non-oxidizing gas such as gas or inert gas is supplied. Arrow A in the figure indicates the flow of the medium, and pulverized coal that is continuously and quantitatively cut out from the storage tank (1) by the quantitative cutout device (6) is mixed with this medium. Then, the pulverized coal is transported to the dust collecting chamber of the dry electric dust collector on the medium drawn by the blower ( 4 ), and the temperature controller (7) is located at a position before the dry electric dust collector (2). The temperature of the medium is adjusted to a predetermined temperature by a humidifier, and the humidity of the medium is increased by, for example, 10% or more by a humidity controller (8), and the medium is carried into the dust collection chamber.
炭素粒子の固有抵抗 は一般に/0(： <104〔1 ' 111〕 で低固有 抵抗であるのに対 し、 灰分粒子の固有抵抗 Paは一般に 104 The specific resistance of carbon particles is generally / 0 (: <10 4 [1'111], which is a low specific resistance, whereas the specific resistance Pa of ash particles is generally 10 4
CO ' Cm ^ < Pa <iou -Q -^ と 中間固'有抵抗を示すため、 乾- 式電気集塵機（2)ではこ の固有抵抗の差に よ つ て灰分粒子を 集塵電極 〔 図示せず 〕 で捕え、 集塵室出口 につながる搬出 通路（3)には前記媒体にの っ た純度の高い微粉炭が排出 され る。 矢印 B は純度の高い微粉炭がの った媒体の流れを表わ す。 ¾お炭素粒子 も条件に よ っ ては前記集塵電極に一旦捕 集されるが、 灰分粒子と の固有抵抗と の遣いから炭素粒子 は再飛散現象を起こすため、 乾式電気集塵機（2)では灰分粒 子だけが集塵電極に確実に捕集され、 捕集された灰分粒子 は集塵電極を流下 して乾式電気集塵機（2)の ホ ッ パー（9)に落 下する。 矢印 C は灰分粒子の排出を表わす。 CO - to indicate 'Cm ^ <Pa <io u -Q ^ and intermediate solid' Yes resistance, dry - wherein the electrostatic precipitator (2) collection electrode [FIG ash particles One by the difference in the resistivity of Dewako High purity pulverized coal deposited on the medium is discharged into the discharge passage (3) leading to the outlet of the dust collection chamber. Arrow B indicates the flow of the medium on which the high-purity pulverized coal is loaded. ¾ but your carbon particles also is Tsu by the conditions are once catching collection in the dust collection electrode, carbon particles from the simple task of the inherent resistance of the ash particles to cause a re-scattering phenomenon, the dry electrostatic precipitator (2) Only the ash particles are reliably collected by the collecting electrode, and the collected ash particles flow down the collecting electrode and fall to the hopper (9) of the dry electric precipitator (2). Arrow C indicates emission of ash particles.
灰分粒子の固有抵抗は約 50で 〜 60 °Cにおいて最小と な Ϊ) . 温度上昇と共に増大 して約 100 °C 〜 200 °C で最大値を示 し、 更に高温に る と漸次低下する も のであ るため、 温度調節 The specific resistance of the ash particles is minimum at about 50 to 60 ° C.) It increases with increasing temperature, reaches a maximum at about 100 to 200 ° C, and gradually decreases at higher temperatures. Temperature control
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装置（7)では灰分粒子が大 き ¾固有抵抗を程する よ う 前記媒 体の温度を調節 して乾式電 塵檨（2)に ける灰分粒子の 捕集効率を向上 させる。 ま た集塵室中の湿度が高 く る と 乾式電気集塵機（2)は高い電圧を荷電 して運転する ことが可 能であるため、 湿度調節装置（8)に よ っ て前記媒体の湿度を 調節 し、 乾式電気集塵機（2)に高い電圧を荷電 して運転する。 す わち高い電圧をかけて乾式 檨（2)を運転する方 が電界強度が高 く ¾ つ て、 延いては集塵 率が向上 して灰 分分離効率が向上する も のである o In the device (7), the efficiency of collecting the ash particles in the dry dust (2) is improved by adjusting the temperature of the medium so that the ash particles are large (the specific resistance is reduced). When the humidity in the dust collection chamber is high, the dry electric dust collector (2) can be operated by charging a high voltage, and the humidity of the medium is controlled by the humidity controller (8). Is adjusted and the dry electric precipitator (2) is charged with high voltage for operation. In other words, when the dry type ( 2 ) is operated by applying a high voltage, the electric field strength is higher, and thus the dust collection rate is improved and the ash separation efficiency is improved.
¾お乾式電気集塵機（2)の 室の室数を適宜増加する こ と に よ っ て、 灰分粒子の分 度を向上させる こ とが可能 である こ とは述べるま で も It goes without saying that it is possible to improve the fraction of ash particles by appropriately increasing the number of chambers in the dry electric dust collector (2).
以上説明の よ う に本発明の方法に よ る と、 被処理物と し ての黴粉炭を非酸化性ガス の流れにのせて運搬 し、 運搬中 に徵粉炭をのせた非酸化性ガスの温度及び湿度を調節 して 乾-式電気集塵室に送 ]?、 該 集塵室内で炭素粒子と灰分 粒子との固有抵抗の違いに つ て灰分粒子を捕集分離 し、 も っ て乾式電気集塵室出口 において非酸化性ガス にの つ た 純度の高い徵粉炭を得る も のであるため、 灰分分離除去の 作業性が良 く 、 分離精度を容易に調節でき る も'のである。 ま た乾式電気集塵室内は非酸化性ガス で充満するため、 徵 粉炭を集塵室に入れるに もかかわ らず放電現象が発生 して も爆発する よ う こ とが ¾ < 、 安全に黴粉炭の純度をあげ る こ とがで き る ものである As described above, according to the method of the present invention, mold powder coal as an object to be treated is transported in a stream of non-oxidizing gas, and the non-oxidizing gas loaded with pulverized coal during transport is transported. The temperature and humidity are adjusted and sent to the dry-type electrostatic precipitator.] The ash particles are collected and separated in the dust-collecting chamber due to the difference in specific resistance between the carbon particles and the ash particles. Since high-purity pulverized coal with non-oxidizing gas is obtained at the outlet of the electrostatic precipitator, the workability of ash separation and removal is good and the separation accuracy can be easily adjusted. In addition, since the dry electric dust collection chamber is filled with a non-oxidizing gas, が it is possible to explode even if a discharge phenomenon occurs regardless of whether dust coal enters the dust collection chamber. It can increase the purity of pulverized coal
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Claims
1. 被処理物と しての微粉炭を非酸化性ガス の流れにのせ て運搬 し、 運搬中に微粉炭をのせた非酸化性ガス の温度及 び湿度を調節 した後乾式電気集塵室に送 、 該電気集塵室 内で炭素粒子と灰分粒子と の固有抵抗の違いに よ っ て灰分 粒子を捕集分離 し、 も っ て乾式電気集塵室出口におい て非 酸化性ガス にの つた純度の高い微粉炭を得る こ と を特徴と する石炭の脱灰方法。 1. Pulverized coal as an object to be treated is transported in the flow of non-oxidizing gas, and the temperature and humidity of the non-oxidizing gas loaded with pulverized coal are adjusted during transportation, and then the dry electric dust collection chamber The ash particles are collected and separated by the difference in the specific resistance between the carbon particles and the ash particles in the electrostatic precipitating chamber, so that the non-oxidizing gas is removed at the outlet of the dry electric precipitating chamber. A coal demineralization method characterized by obtaining finely pulverized coal.
2. 前記非酸化性ガ ス が炭酸ガス 、 窒素ガ ス及び不活性ガ ス のいずれか、 又はこれ らの任意の組合せから成る こ と を 特徴とする請求の範囲第 1 項に記載の石炭の脱灰方法。 2. The coal according to claim 1, wherein the non-oxidizing gas comprises one of carbon dioxide gas, nitrogen gas and inert gas, or any combination thereof. Demineralization method.
3. 前記微粉炭をのせた非酸化性ガス中の水分が約 10 %以 上にな る よ う に湿度を調節する こ と を特徴とする請求の範 囲第 1 項又は第 2 項に記載の石炭の脱灰方法。 ' 4. 前記微粉炭をのせた非酸化性ガスを、 灰分粒子が最大 の固有抵抗を有する温度、 例えば約 100 い し 200 °Cま で 昇温する こ と を特徵 とする請求の範囲第 1 ¾ い し第 3 項 - のいずれかに記載の石炭の脱灰方法。 3. The method according to claim 1 or 2, wherein the humidity is adjusted so that the moisture in the non-oxidizing gas on which the pulverized coal is loaded is about 10% or more. Coal demineralization method. '4. The non-oxidizing gas on which the pulverized coal is loaded is heated to a temperature at which the ash particles have a maximum specific resistance, for example, about 100 to 200 ° C.方法 The coal demineralization method according to any of paragraph 3-.
-BUREA-BUREA
OMPI
要 約 書 OMPI Summary Form
被処理物 と しての徽粉炭を非酸化性ガス の流れ (A)にのせ て運搬 し、 運搬中に微粉炭をのせた非酸化性ガス の温度及 び湿度を調節 した後乾式電気集塵室（2)に送 j?、 該電気集塵 室（2)内で炭素粒子と灰分粒子との固有抵抗の遣いに よ つて 灰分粒子を捕集分離 し、 も っ て乾式電気集塵室出口（3)にお いて非酸化性ガス にの っ た純度の高い微粉炭 (B)を得る よ う に した石炭の脱灰方法。 The dry coal dust is transported by carrying the coal powder as the material to be treated in the flow of non-oxidizing gas (A), and adjusting the temperature and humidity of the non-oxidizing gas loaded with pulverized coal during transport. Ash particles are collected and separated by the use of the specific resistance between the carbon particles and the ash particles in the electrostatic precipitator (2). (3) A method of demineralizing coal so as to obtain highly pure pulverized coal (B) on a non-oxidizing gas.
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1982/000120 WO1983003619A1 (en) | 1982-04-14 | 1982-04-14 | Process for deashing coal |
| BR8208076A BR8208076A (en) | 1982-04-14 | 1982-04-14 | PROCESS TO REMOVE COAL ASH |
| DE19823248881 DE3248881T1 (en) | 1982-04-14 | 1982-04-14 | Method of removing ash from coal |
| GB08236845A GB2127038B (en) | 1982-04-14 | 1982-04-14 | Process for deashing coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1982/000120 WO1983003619A1 (en) | 1982-04-14 | 1982-04-14 | Process for deashing coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1983003619A1 true WO1983003619A1 (en) | 1983-10-27 |
Family
ID=13762234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1982/000120 WO1983003619A1 (en) | 1982-04-14 | 1982-04-14 | Process for deashing coal |
Country Status (4)
| Country | Link |
|---|---|
| BR (1) | BR8208076A (en) |
| DE (1) | DE3248881T1 (en) |
| GB (1) | GB2127038B (en) |
| WO (1) | WO1983003619A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5177603A (en) * | 1974-12-28 | 1976-07-06 | Nippon Kokan Kk | TEIHINISEKITANKARANO KOHINIGENRYOTANHENO TENKAHOHO |
| JPS53108101A (en) * | 1977-01-21 | 1978-09-20 | Hazen Research | Method of improving coals |
| JPS56125486A (en) * | 1980-03-05 | 1981-10-01 | Sanyo Chem Ind Ltd | Additive for deliming and granulation |
-
1982
- 1982-04-14 DE DE19823248881 patent/DE3248881T1/en not_active Ceased
- 1982-04-14 WO PCT/JP1982/000120 patent/WO1983003619A1/en active Application Filing
- 1982-04-14 GB GB08236845A patent/GB2127038B/en not_active Expired
- 1982-04-14 BR BR8208076A patent/BR8208076A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5177603A (en) * | 1974-12-28 | 1976-07-06 | Nippon Kokan Kk | TEIHINISEKITANKARANO KOHINIGENRYOTANHENO TENKAHOHO |
| JPS53108101A (en) * | 1977-01-21 | 1978-09-20 | Hazen Research | Method of improving coals |
| JPS56125486A (en) * | 1980-03-05 | 1981-10-01 | Sanyo Chem Ind Ltd | Additive for deliming and granulation |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3248881T1 (en) | 1984-05-03 |
| BR8208076A (en) | 1984-04-17 |
| GB2127038B (en) | 1985-12-11 |
| GB2127038A (en) | 1984-04-04 |
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