JPH0357002B2 - - Google Patents
Info
- Publication number
- JPH0357002B2 JPH0357002B2 JP57187991A JP18799182A JPH0357002B2 JP H0357002 B2 JPH0357002 B2 JP H0357002B2 JP 57187991 A JP57187991 A JP 57187991A JP 18799182 A JP18799182 A JP 18799182A JP H0357002 B2 JPH0357002 B2 JP H0357002B2
- Authority
- JP
- Japan
- Prior art keywords
- conveyor belt
- rubber
- surface tension
- head
- dyne
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003027 oil sand Substances 0.000 claims description 34
- 229920001971 elastomer Polymers 0.000 claims description 28
- 239000005060 rubber Substances 0.000 claims description 28
- 239000010426 asphalt Substances 0.000 claims description 22
- 239000010410 layer Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 6
- 239000004945 silicone rubber Substances 0.000 claims description 6
- 244000043261 Hevea brasiliensis Species 0.000 claims description 5
- 229920003052 natural elastomer Polymers 0.000 claims description 5
- 229920001194 natural rubber Polymers 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 4
- 229920005549 butyl rubber Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 239000002344 surface layer Substances 0.000 claims 1
- 230000032258 transport Effects 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 8
- -1 polytetrafluoroethylene Polymers 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- YODZTKMDCQEPHD-UHFFFAOYSA-N thiodiglycol Chemical compound OCCSCCO YODZTKMDCQEPHD-UHFFFAOYSA-N 0.000 description 1
- 229950006389 thiodiglycol Drugs 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/30—Belts or like endless load-carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Belt Conveyors (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は運搬物が水又は油又はその混合物を５
重量％以上含むオイルサンドを運搬するコンベヤ
ベルト装置に関する。
第１図はこの種のコンベヤベルト装置を簡単化
して示した１例であり、コンベヤベルト１は駆動
プーリ２とテールプーリ３との間に巻掛けられ、
矢印Ａ方向に進行する。ヘツドスナブプーリ４を
設けて駆動プーリ２に対する大きい巻付角を与
え、戻り側はリターン側ローラ５を列設して指示
するようになつている。６は付着物を掻取るスク
レーパを示し、このスクレーパ６は平板状を呈し
ており、ヘツドスナブプーリ４に押しつけられて
付着物を掻き取るように構成されている。
従来、粘稠物、例えばオイルサンド、スラリ
ー、ヘドロ等を輸送するために使用されているコ
ンベヤベルトの表面のカバー層は非付着性を有し
ないので運転中に粘稠物がコンベヤベルト１だけ
でなく、ヘツドスナブプーリ４、リターン側ロー
ラ５の外周面に付着し、圧着されて不規則に成長
するため、ベルト蛇行、荷こぼれ等の問題を惹起
した。また、この付着物を掻取るためのスクレー
パ等の掻取手段をベルト運行路の各所に適宜配置
しても充分に効果を発揮することができなかつ
た。
また、オイルサンド運搬用のコンベヤベルト
は、オイルサンドの堀取地点からビチユーメン分
離処理地点までを長距離輸送するため、様々に変
化する年間気候条件のもとで充分な強度と可撓性
を有する必要があり、この点から心体コードや帆
布とによく接着する汎用ゴムを使用したコンベヤ
ベルトが使用されていた。しかし、このベルトの
汎用ゴム表面は非付着性を有しないので運搬中に
オイルサンドがコンベヤベルト１だけでなく、ヘ
ツドスナブプーリ４、リターン側ローラ５の外周
面に付着し圧着されて不規則に成長するため、ベ
ルト蛇行、荷こぼれ等の問題を惹起していた。こ
の付着物は、ベルト運行路の各所に適宜配置した
スクレーパ等の掻取手段によつても充分に掻き取
ることができなかつた。
さらに、従来のオイルサンド運搬用コンベヤベ
ルトは表面に灯油、軽油等を散布することによ
り、ベルトとオイルサンドとの非付着性を保つて
いた。しかし、火災予防の安全性の面から油の散
布を中止しなければならず、この対策は禁止され
た。
本発明はこのような従来の技術の有する問題点
に鑑みてなされたものであつて、その目的はコン
ベヤベルト装置へのオイルサンドの付着の問題を
解決することにある。
本発明のコンベヤベルト装置は、駆動プーリ２
とテールプーリ３との間にコンベヤベルト１を巻
掛け、進行するコンベヤベルト１が駆動プーリ２
をまわつて戻り側となる位置にヘツドスナブプー
リ４を設けたオイルサンド長距離移送用コンベヤ
ベルト装置において、オイルサンドの主成分であ
るビチユーメンの臨界表面張力＝30〜35dyne／
cmに対して、コンベヤベルトの芯層のコード、帆
布の接着ゴム上に強力に接着しかつ臨界表面張力
が略18dyne／cm以下であつてオイルサンド付着
性の少ない材質によりカバー層表面を形成してコ
ンベヤベルトとするとともに、ヘツドスナブプー
リの表面を臨界表面張力が略26〜36dyne／cmで
あつてオイルサンド付着性がコンベヤベルト表面
より大きいゴム材質で被覆してヘツドスナブプー
リとしたことを特徴とする。
本願発明の臨界表面張力とは、以下に説明する
ものをいう。すなわち、表面張力が既知の液体と
して、例えばグリセリン、ホルムアミド、チオジ
グリコール、エチレングリコールおよびポリエチ
レングリコール（平均分子量200）等を用いて、
この液体の一滴Ｌを測定試料、例えばゴム製の平
板上に落とすと、第３図のようになる。同図の濡
れ角Θは液体の表面張力によつて変化し、液体の
表面張力が小さくなるにつれて濡れ角Θも減少す
る。第４図は、テフロンをノルマルアルカン類で
濡らしたときのノルマルアルカンの表面張力を横
軸に、cosΘを縦軸にとつて示した図で、それら
実験点を貫く直線が、cosΘ＝１の線にぶつかる
点の表面張力が『臨界表面張力γC』である。
cosΘ＝１とは、すなわちΘ＝0°の場合であり、
測定試料が完全に濡れたことを示す。この臨界表
面張力γCは、測定試料の材質により、また測定温
度により異なる。第４図の例では25℃で測定し
た。
第２図は横軸にこの臨界表面張力γC（単位：
dyne／cm、温度25℃）をとり、縦軸にアスフア
ルト剥離力（単位：ｇ／cm）をとつて示したもの
で、(a)はシリコンゴム、(b)はポリテトラフルオロ
エチレン、(c)はフツ素ゴム、(d)は天然ゴム
（NR）、(e)はスチレンブタジエン共重合体ゴム
（SBR）、(f)はポリエチレン、(g)はアクリロニト
リルブタジエン共重合体ゴム（NBR）である。
γLはオイルサンドの付着性の主因となるビチユー
メンの表面張力（約32dyne／cm）を示す。なお、
『アスフアルト剥離力』とは、以下に説明するも
のをいう。すなわち、厚み0.08mmの上質紙にビチ
ユーメンから製造したアスフアルトを0.01ｇ／cm2
の圧力で加圧含浸させ、幅１cm、長さ１cmに裁断
した上記(a)〜(g)の素材を25℃の温度で３Kg／cm2の
圧力で10秒間圧着した後、剥離速度50mm／分で
180度剥離したときの力をアスフアルト剥離力と
いう。
第２図から明らかなように、オイルサンドの主
成分であるビチユーメンの表面張力に近似する臨
界表面張力においてアスフアルト剥離力は最大と
なつている。すなわち、ビチユーメンの表面張力
とゴムの臨界表面張力が近似すれば、ゴムとビチ
ユーメン、すなわち、ゴムとオイルサンドは付着
しやすくなり、ビチユーメンの表面張力とゴムの
臨界表面張力が隔たれば、ゴムとオイルサンドは
付着しにくくなることが分かる。
次に、本発明の実施例を説明する。
供試材
コンベヤベルト１としては、150Kg／cm2の強
力ナイロンのたて、よこ組織の帆布２層の芯と
して表側厚さ４mm、裏側厚さ２mmの帆布ゴム層
に次に表面カバーゴムを加硫接着するかポリテ
トラフルオロエチレンを表面に加熱圧着した
350mm幅の帆布芯コンベヤベルト１を用意した。
γC（単位dyne／cm）
(W)ポリテトラフルオロエチレン 18
(X)シリコンゴム ５
(Y)NBR 36
(Z)NR 29
ヘツドスナブプーリ２としては、次の表面被
覆のものを用意した。
γC（単位dyne／cm）
(A)シリコンゴム ５
(B)ブチルゴム 28
(C)クロロプレンゴム 33
(D)鋼帯（SS41） 45
供試コンベヤベルト寸法および試験条件
供試コンベヤベルトの寸法は以下のとおりで
ある。
プーリ２，３間の中心距離 4000mm
プーリ２，４間の中心距離 200mm
駆動プーリ２の径 200mm
ヘツドスナブプーリ４の径 100mm
また、試験条件は以下のようにした。
ビチユーメン10％、水0.5％、砂89.5％から
なるオイルサンドの総量180ｇｒを第１図イ点
の幅300mm、長さ300mmの範囲に載せ、圧力0.2
Kg／cm2、時間１分で圧着し、のち45ｍ／分のベ
ルト速度で５サイクル走行させ、コンベヤベル
ト１表面およびヘツドスナブプーリ４表面に残
るオイルサンド量および駆動プーリ２からのシ
ユート量を測定した。なお、ヘツドスナブプー
リ４のコンベヤベルト１への圧着力は１Kg／cm2
に調整した。
試験結果
試験結果は次頁の表１に示すとおりである。
表１第７列の差量は、総量180ｇｒに対するコ
ンベヤベルト表面残留量、ヘツドスナブプーリ
表面残留量およびシユート量合計との差で、ベ
ルト走行中の振動によりオイルサンドの一部が
ヘツドスナブプーリ４とテールプーリ３との間
で落下した落鉱量をいう。
The present invention is characterized in that the conveyance contains water or oil or a mixture thereof.
The present invention relates to a conveyor belt device for conveying oil sand containing more than % by weight. FIG. 1 shows a simplified example of this type of conveyor belt device, in which a conveyor belt 1 is wound between a drive pulley 2 and a tail pulley 3.
Proceed in the direction of arrow A. A head snub pulley 4 is provided to give a large wrap angle to the drive pulley 2, and return side rollers 5 are arranged in a row to direct the return side. Reference numeral 6 denotes a scraper for scraping off deposits. This scraper 6 has a flat plate shape and is configured to be pressed against the head snub pulley 4 to scrape off deposits. Conventionally, the cover layer on the surface of a conveyor belt used to transport viscous materials such as oil sand, slurry, sludge, etc. does not have non-adhesive properties. Instead, it adheres to the outer circumferential surfaces of the head snub pulley 4 and the return roller 5, and grows irregularly due to pressure, causing problems such as belt meandering and load spillage. Furthermore, even if scraping means such as scrapers for scraping off the deposits are appropriately placed at various locations along the belt travel route, they are not sufficiently effective. Conveyor belts for transporting oil sand have sufficient strength and flexibility to withstand the varying annual climate conditions, as they transport long distances from the oil sand extraction point to the bitumen separation processing point. From this point of view, conveyor belts made of general-purpose rubber, which adheres well to core cords and canvas, have been used. However, since the general-purpose rubber surface of this belt does not have anti-adhesive properties, oil sand adheres not only to the conveyor belt 1 but also to the outer circumferential surfaces of the head snub pulley 4 and return roller 5 during transportation, and is crimped irregularly. This growth caused problems such as belt meandering and load spillage. This deposit could not be sufficiently scraped off even by scraping means such as scrapers placed appropriately at various locations along the belt travel path. Furthermore, conventional conveyor belts for conveying oil sand maintain non-adhesion between the belt and oil sand by spraying kerosene, light oil, etc. on the surface. However, the spraying of oil had to be stopped due to fire safety concerns, and this measure was prohibited. The present invention has been made in view of the problems of the prior art, and its purpose is to solve the problem of oil sand adhesion to a conveyor belt device. The conveyor belt device of the present invention has a drive pulley 2
The conveyor belt 1 is wound between the drive pulley 2 and the tail pulley 3.
In a conveyor belt device for long-distance transportation of oil sand, which has a head snub pulley 4 on the return side, the critical surface tension of bitumen, which is the main component of oil sand, is 30 to 35 dyne/
cm, the surface of the cover layer is formed of a material that strongly adheres to the cord of the core layer of the conveyor belt and the adhesive rubber of the canvas, has a critical surface tension of about 18 dyne/cm or less, and has little oil sand adhesion. In addition, the surface of the head snub pulley is coated with a rubber material that has a critical surface tension of approximately 26 to 36 dyne/cm and has greater oil sand adhesion than the conveyor belt surface to form a head snub pulley. shall be. The critical surface tension of the present invention refers to what is explained below. That is, using liquids with known surface tensions such as glycerin, formamide, thiodiglycol, ethylene glycol, and polyethylene glycol (average molecular weight 200),
When a drop L of this liquid is dropped onto a measurement sample, for example a flat plate made of rubber, the result will be as shown in FIG. The wetting angle Θ in the figure changes depending on the surface tension of the liquid, and as the surface tension of the liquid decreases, the wetting angle Θ also decreases. Figure 4 shows the surface tension of normal alkanes when Teflon is wetted with normal alkanes on the horizontal axis and cosΘ on the vertical axis, and the straight line passing through these experimental points is the line of cosΘ = 1. The surface tension at the point where it collides with is the "critical surface tension γ C ".
cosΘ=1 means that Θ=0°,
Indicates that the sample to be measured is completely wet. This critical surface tension γ C varies depending on the material of the measurement sample and the measurement temperature. In the example shown in Figure 4, measurements were taken at 25°C. In Figure 2, the horizontal axis shows this critical surface tension γ C (unit:
dyne/cm (temperature: 25°C), and the asphalt peeling force (unit: g/cm) is plotted on the vertical axis. (a) is silicone rubber, (b) is polytetrafluoroethylene, (c is ) is fluoro rubber, (d) is natural rubber (NR), (e) is styrene butadiene copolymer rubber (SBR), (f) is polyethylene, and (g) is acrylonitrile butadiene copolymer rubber (NBR). be.
γ L indicates the surface tension of bitumen (approximately 32 dyne/cm), which is the main cause of oil sand adhesiveness. In addition,
"Asphalt peeling force" refers to what is explained below. In other words, 0.01 g/cm 2 of asphalt made from bityumen is applied to high-quality paper with a thickness of 0.08 mm.
The above materials (a) to (g), which were impregnated under pressure at a pressure of in minutes
The force when peeling 180 degrees is called the asphalt peeling force. As is clear from FIG. 2, the asphalt peeling force is at its maximum at a critical surface tension that is close to the surface tension of bitumen, which is the main component of oil sand. In other words, if the surface tension of the bitumen and the critical surface tension of the rubber are close to each other, rubber and the bitumen, or in other words, rubber and oil sand, will easily adhere to each other, and if the surface tension of the bitumen and the critical surface tension of the rubber are different, then the rubber and the oil will stick together. It can be seen that sand becomes difficult to adhere to. Next, examples of the present invention will be described. Test material Conveyor belt 1 was made of 150Kg/cm 2 strong nylon canvas with two layers of warp and weft structures, a canvas rubber layer with a thickness of 4 mm on the front side and a thickness of 2 mm on the back side, and then a surface cover rubber was added. Bonded with sulfur or heat-pressed polytetrafluoroethylene to the surface.
A canvas core conveyor belt 1 with a width of 350 mm was prepared. γ C (unit: dyne/cm) (W) Polytetrafluoroethylene 18 (X) Silicone rubber 5 (Y) NBR 36 (Z) NR 29 As the head snub pulley 2, one with the following surface coating was prepared. γ C (Unit: dyne/cm) (A) Silicone rubber 5 (B) Butyl rubber 28 (C) Chloroprene rubber 33 (D) Steel strip (SS41) 45 Test conveyor belt dimensions and test conditions The dimensions of the test conveyor belt are as follows. It is as follows. Center distance between pulleys 2 and 3: 4000 mm Center distance between pulleys 2 and 4: 200 mm Diameter of drive pulley 2: 200 mm Diameter of head snub pulley 4: 100 mm The test conditions were as follows. A total of 180g of oil sand consisting of 10% bityumen, 0.5% water, and 89.5% sand was placed on an area of 300mm wide and 300mm long at point A in Figure 1, and the pressure was 0.2.
Kg/cm 2 , crimped for 1 minute, then run for 5 cycles at a belt speed of 45 m/min, and measure the amount of oil sand remaining on the surface of conveyor belt 1 and head snub pulley 4, and the amount of shute from drive pulley 2. did. The pressure force of the head snub pulley 4 on the conveyor belt 1 is 1Kg/cm 2
Adjusted to. Test Results The test results are shown in Table 1 on the next page.
The difference in the 7th column of Table 1 is the difference between the amount remaining on the conveyor belt surface, the amount remaining on the head snub pulley surface, and the total shute amount for a total amount of 180 gr. This refers to the amount of fallen ore that has fallen between the tail pulley 3 and the tail pulley 3.
【表】
上記結果より、以下の点が明らかである。
本発明の場合、コンベヤベルト表面の臨界表
面張力がビチユーメンの表面張力に比較してか
なり小さいため、オイルサンドが付着しにく
く、コンベヤベルト表面の残留量が少ない。ま
た、ヘツドスナブプーリ表面の臨界表面張力が
ビチユーメンの表面張力に近いため、ヘツドス
ナブプーリ表面の残留量が多い。その結果、落
鉱量（差量）が少ない。
比較例１は、コンベヤベルト表面の臨界表面
張力がビチユーメンの表面張力に比してかなり
小さいため、シユート量は比較的多い。しか
し、同時にヘツドスナブプーリ表面の臨界表面
張力もかなり小さいため、ヘツドスナブプーリ
にオイルサンドが付着しにくく、その結果、コ
ンベヤベルト表面の残留量が本発明のものより
多くなつている。また落鉱量（差量）が多い。
比較例２も、コンベヤベルト表面の臨界表面
張力がビチユーメンの表面張力に比してかなり
小さいため、シユート量は比較的多い。しか
し、ヘツドスナブプーリ表面の臨界表面張力が
ビチユーメンの表面張力に比べて大き過ぎるた
め、ヘツドスナブプーリにオイルサンドが付着
しにくく、その結果、コンベヤベルト表面の残
留量が本発明のものより多くなつている。ま
た、落鉱量（差量）が多い。
比較例３〜６は、コンベヤベルト表面の臨界
表面張力がビチユーメンの表面張力に近似して
いるため、オイルサンドがコンベヤベルトに非
常に付着しやすく、コンベヤベルト表面の残留
量が極めて多い。
以上、ビチユーメンの表面張力γL（約32dyne／
cm）に対し、コンベヤベルトのカバー層の臨界表
面張力を5dyne／cmと小さくしても、ヘツドスナ
ブプーリの臨界表面張力が同じように5dyne／cm
と小さければ（比較例１）、コンベヤベルト表面
の残留量が増えると共に、落鉱量（差量）が多く
なる。この場合、ヘツドスナブプーリの臨界表面
張力が45dyne／cmと大き過ぎても（比較例２）、
コンベヤベルト表面の残留量が多くなると共に、
落鉱量（差量）も多くなる。
また、コンベヤベルトのカバー層の臨界表面張
力が36dyne／cm（比較例３、４）、または
29dyne／cm（比較例５、６）とビチユーメンの
表面張力（32dyne／cm）に近似すれば、コンベ
ヤベルト表面の残留量が極めて多くなる。
そこで、コンベヤベルト１のカバー層の臨界表
面張力を略18dyne／cm以下と小さくしてオイル
サンドの付着性を弱くしておき、一方、シユート
直後のベルトに遭遇するヘツドスナブプーリ４表
面の臨界表面張力を28〜33dyne／cmとしてオイ
ルサンドの表面張力に近似させることにより、オ
イルサンドに対する付着性を強力にし、その結
果、シユート時に除去されずにコンベヤベルトに
付着しているオイルサンドを表面張力の差により
ヘツドスナブプーリ４に移転させることができ
る。また、表１より明らかなように、コンベヤベ
ルト表面の臨界表面張力が36dyne／cmのもの
（比較例３、４）でも、コンベヤベルト表面のオ
イルサンド残留量は多い。すなわち、オイルサン
ドに対する強力な付着性を確保するためには、ヘ
ツドスナブプーリの臨界表面張力の上限は略
36dyne／cmとするのが好ましい。一方、臨界表
面張力が36dyne／cmのアクリロニトリルブタジ
エン共重合体ゴム（第２図ｇ）と同程度のオイル
サンド付着性を有するためには、臨界表面張力の
下限は略26dyne／cmとするのが好ましい（第２
図参照）。
このような構成により、コンベヤベルト１表面
の付着オイルサンドはベルト走行と共にヘツドス
ナブプーリ４に移転されて減量するので、一定限
度以上に成長しない。
一方、ヘツドスナブプーリ４に移乗したオイル
サンドは、このプーリに対して設けたスクレーパ
６により継続的に除去できる。
また、コンベヤベルト１のカバー層の表面の臨
界表面張力γCを略18dyne／cm以下とするには、
シリコンゴムまたはポリテトラフルオロエチレン
を何等かの手段により心体コードに帆布の接着ゴ
ムに接着して一体化したコンベヤベルトとすれば
よい。このシリコンゴムはゴム分30％以上、好ま
しくは40％以上とすればよい。また、ヘツドスナ
ブプーリ４の表面の臨界表面張力γCを略26〜
36dyne／cmとするには、このプーリの表面をブ
チルゴム、クロロプレンゴム、天然ゴム、スチレ
ンブタジエン共重合体ゴム、フツ素ゴム、アクリ
ロニトリルブタジエン共重合体ゴムまたはそれら
のブレンド体をヘツドスナブプーリ４外周に被覆
すればよいことが分かる。これらのゴムはゴム分
30％以上とすればよい。
以上のように、本発明によるとオイルサンドの
付着に悩まされることがなく、また、ベルトとオ
イルサンドとの非付着性を保つために油等の散布
を必要とせず、長い運転期間にわたつてトラブル
を生ぜずに安定して運転でき、しかも比較的安価
に製作できる非粘着性のコンベヤベルト装置を実
現できる。[Table] From the above results, the following points are clear. In the case of the present invention, since the critical surface tension of the conveyor belt surface is considerably smaller than that of the bitumen, oil sand is difficult to adhere to and the amount remaining on the conveyor belt surface is small. Furthermore, since the critical surface tension on the surface of the head snub pulley is close to the surface tension of the bitumen, there is a large amount of residual material on the surface of the head snub pulley. As a result, the amount of fallen ore (difference) is small. In Comparative Example 1, the critical surface tension of the conveyor belt surface is considerably smaller than the surface tension of the bitumen, so the amount of chute is relatively large. However, at the same time, the critical surface tension on the surface of the head snub pulley is also quite low, making it difficult for oil sand to adhere to the head snub pulley, and as a result, the amount remaining on the conveyor belt surface is larger than that of the present invention. Also, there is a large amount of fallen ore (differential amount). In Comparative Example 2, the critical surface tension of the conveyor belt surface is considerably smaller than that of the bitumen, so the amount of chute is relatively large. However, because the critical surface tension on the surface of the head snub pulley is too large compared to the surface tension of the bitumen, it is difficult for oil sand to adhere to the head snub pulley, and as a result, the amount of residual oil on the conveyor belt surface is larger than that of the present invention. ing. In addition, the amount of fallen ore (differential amount) is large. In Comparative Examples 3 to 6, the critical surface tension of the conveyor belt surface is close to the surface tension of bitumen, so oil sand is very likely to adhere to the conveyor belt, and the amount remaining on the conveyor belt surface is extremely large. Above, the surface tension of bityumen γ L (approximately 32dyne/
cm), even if the critical surface tension of the conveyor belt cover layer is reduced to 5 dyne/cm, the critical surface tension of the head snub pulley will be 5 dyne/cm.
If it is small (Comparative Example 1), the amount remaining on the conveyor belt surface increases and the amount of fallen ore (difference) increases. In this case, even if the critical surface tension of the head snub pulley is too large at 45 dyne/cm (Comparative Example 2),
As the amount of residue on the conveyor belt surface increases,
The amount of fallen ore (difference) also increases. In addition, the critical surface tension of the cover layer of the conveyor belt is 36 dyne/cm (Comparative Examples 3 and 4), or
If 29 dyne/cm (Comparative Examples 5 and 6) approximates the surface tension of bitumen (32 dyne/cm), the amount remaining on the conveyor belt surface will be extremely large. Therefore, the critical surface tension of the cover layer of the conveyor belt 1 is reduced to approximately 18 dyne/cm or less to weaken the adhesion of oil sand, while the critical surface tension of the head snub pulley 4, which encounters the belt immediately after the shute, is By setting the tension to 28 to 33 dyne/cm, which approximates the surface tension of oil sand, the adhesion to the oil sand is strengthened. Due to the difference, it can be transferred to the head snub pulley 4. Further, as is clear from Table 1, even when the critical surface tension of the conveyor belt surface is 36 dyne/cm (Comparative Examples 3 and 4), the amount of oil sand remaining on the conveyor belt surface is large. In other words, in order to ensure strong adhesion to oil sand, the upper limit of the critical surface tension of the head snub pulley must be approximately
Preferably, it is 36 dyne/cm. On the other hand, in order to have the same oil sand adhesion as acrylonitrile butadiene copolymer rubber with a critical surface tension of 36 dyne/cm (Fig. 2g), the lower limit of the critical surface tension should be approximately 26 dyne/cm. preferred (second
(see figure). With this configuration, the oil sand attached to the surface of the conveyor belt 1 is transferred to the head snub pulley 4 and reduced in weight as the belt runs, so that it does not grow beyond a certain limit. On the other hand, the oil sand transferred to the head snub pulley 4 can be continuously removed by a scraper 6 provided for this pulley. In addition, in order to make the critical surface tension γ C of the surface of the cover layer of the conveyor belt 1 approximately 18 dyne/cm or less,
The conveyor belt may be made by bonding silicone rubber or polytetrafluoroethylene to the core cord and the adhesive rubber of the canvas by some means. This silicone rubber may have a rubber content of 30% or more, preferably 40% or more. In addition, the critical surface tension γ C of the surface of the head snub pulley 4 is approximately 26~
To achieve 36 dyne/cm, the surface of this pulley is coated with butyl rubber, chloroprene rubber, natural rubber, styrene-butadiene copolymer rubber, fluorocarbon rubber, acrylonitrile-butadiene copolymer rubber, or a blend thereof on the outer periphery of head snub pulley 4. It turns out that it is only necessary to cover it. These rubbers are rubber
It should be 30% or more. As described above, according to the present invention, there is no problem with the adhesion of oil sand, and there is no need to spray oil or the like to maintain non-adhesion between the belt and oil sand, and the belt can be operated for a long period of time. It is possible to realize a non-adhesive conveyor belt device that can be stably operated without causing trouble and can be manufactured at a relatively low cost.
第１図は本発明の適用されるコンベヤベルト装
置を簡単化して示した図、第２図は横軸に臨界表
面張力をとり縦軸にアスフアルト剥離力をとつて
示した図、第３図は濡れ角Θを説明する図、第４
図は臨界表面張力を説明する図である。
１……コンベヤベルト、２……駆動プーリ、３
……テールプーリ、４……ヘツドスナブプーリ、
５……リターン側ローラ、γC……臨界表面張力、
イ……オイルサンド供給点、Ａ……ベルト進行方
向矢印。
Figure 1 is a simplified diagram of a conveyor belt device to which the present invention is applied, Figure 2 is a diagram with critical surface tension on the horizontal axis and asphalt peeling force on the vertical axis, and Figure 3 is a diagram showing asphalt peeling force on the vertical axis. Diagram explaining wetting angle Θ, 4th
The figure is a diagram explaining critical surface tension. 1... Conveyor belt, 2... Drive pulley, 3
...Tail pulley, 4...Head snub pulley,
5...Return side roller, γ C ...Critical surface tension,
A...Oil sand supply point, A...Belt traveling direction arrow.
Claims (1)
トの戻り側の最初の位置に圧接するヘツドスナブ
プーリを設け、オイルサンドの主成分であるビチ
ユーメンの表面張力＝30〜35dyne／cmに対して、
臨界表面張力がほぼ18dyne／cm以下の材質によ
りコンベヤベルトのカバー層の表面を形成すると
共に、ヘツドスナブプーリの表面を臨界表面張力
がほぼ26〜36dyne／cmのゴム材質により被覆し、
ヘツドスナブプーリに近接する位置にコンベヤベ
ルトからの付着物を除去するためのスクレーパを
設置したことを特徴とするコンベヤベルト装置。 ２ 前記コンベヤベルトのカバー層ゴムとしてシ
リコンゴムを使用し、ヘツドスナブプーリの表面
層ゴムとしてブチルゴム、クロロプレンゴム、天
然ゴム、スチレンブタジエン共重合体ゴム、フツ
素ゴム、アクリロニトリルブタジエン共重合体ゴ
ムまたはそれらのブレンド体を使用する特許請求
の範囲第１項記載のコンベヤベルト装置。[Claims] 1. A head snub pulley is provided that presses against the first position on the return side of a conveyor belt that transports oil sand over long distances, and the surface tension of bitumen, which is the main component of oil sand, is adjusted to 30 to 35 dyne/cm. for,
Forming the surface of the cover layer of the conveyor belt with a material having a critical surface tension of approximately 18 dyne/cm or less, and covering the surface of the head snub pulley with a rubber material having a critical surface tension of approximately 26 to 36 dyne/cm;
A conveyor belt device characterized in that a scraper for removing deposits from the conveyor belt is installed in a position close to a head snub pulley. 2 Silicone rubber is used as the cover layer rubber of the conveyor belt, and butyl rubber, chloroprene rubber, natural rubber, styrene-butadiene copolymer rubber, fluorine rubber, acrylonitrile-butadiene copolymer rubber, or the like is used as the surface layer rubber of the head snub pulley. A conveyor belt device according to claim 1, which uses a blend of.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18799182A JPS5978003A (en) | 1982-10-25 | 1982-10-25 | Conveyor belt device |
| CA000438285A CA1208597A (en) | 1982-10-25 | 1983-10-04 | Conveyor belt device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18799182A JPS5978003A (en) | 1982-10-25 | 1982-10-25 | Conveyor belt device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5978003A JPS5978003A (en) | 1984-05-04 |
| JPH0357002B2 true JPH0357002B2 (en) | 1991-08-29 |
Family
ID=16215707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18799182A Granted JPS5978003A (en) | 1982-10-25 | 1982-10-25 | Conveyor belt device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5978003A (en) |
| CA (1) | CA1208597A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6834272B2 (en) * | 2016-09-08 | 2021-02-24 | 日本製鉄株式会社 | Belt conveyor test equipment and belt conveyor test method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5160088U (en) * | 1974-11-05 | 1976-05-12 |
-
1982
- 1982-10-25 JP JP18799182A patent/JPS5978003A/en active Granted
-
1983
- 1983-10-04 CA CA000438285A patent/CA1208597A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5978003A (en) | 1984-05-04 |
| CA1208597A (en) | 1986-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4706692A (en) | Method and apparatus for coating reconstituted tobacco | |
| JP2584238Y2 (en) | Apparatus for attaching a layer of fine particles to sheet material | |
| EP0448080B1 (en) | Self-cleaning thin belt conveyor in painting or dyeing plants | |
| US6216842B1 (en) | Object conveying surface with liner and method of applying the liner to the surface | |
| CA2448074C (en) | Conveyor belt with plastic coating | |
| CA1204734A (en) | Screw driven sludge thickeners | |
| EP0647692A2 (en) | High temperature-resistant masking tape | |
| US3739745A (en) | Glue reclaiming system | |
| JPH0357002B2 (en) | ||
| AU2001218447A1 (en) | Method of coating a substrate | |
| EP0894028B1 (en) | Device for application of glue on objects | |
| US3972762A (en) | Coating method | |
| PL116928B1 (en) | Method of conveying materials containing small particles,conveyor system and endless conveyor belt therefor,uzel konvejjera i beskonechnaja lenta,primenjaemaja w ehtom sposobe | |
| US4521479A (en) | Surface treatment for tack reduction of elastomer surfaces | |
| DE102006003912B4 (en) | Conveyor belt with non-stick coating | |
| SE465709B (en) | PROCEDURE APPLIES DUPLEXIC COATING OF A CURRENT COURT BY TWO OPPOSED TRANSFER ROLLS | |
| Hetzel | Belt conveyors and belt elevators | |
| US3011913A (en) | Method of coating paperboard carton blanks | |
| US4611409A (en) | Liquid removing method | |
| CA2263272A1 (en) | Block feeding of solid paint onto a continuously moving metal strip | |
| ATE30129T1 (en) | METHOD AND EQUIPMENT FOR CONTINUOUSLY MANUFACTURING FOAM RUBBER. | |
| IE811393L (en) | Pyrazolopyridines | |
| JPH06335608A (en) | Separation of solid matter from solid-liquid mixture and its device | |
| JPH0825615B2 (en) | Conveyor belt equipment | |
| US1263051A (en) | Method of manufacturing roofing material. |