JP6332099B2 - Bulk specific gravity measuring device and bulk specific gravity measuring method for storage in storage tank - Google Patents
Bulk specific gravity measuring device and bulk specific gravity measuring method for storage in storage tank Download PDFInfo
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Description
本発明は、貯槽内貯留物のかさ比重測定装置およびかさ比重測定方法に関する。本発明のかさ比重測定装置およびかさ比重測定方法は、容器内に充填した物質のかさ比重を測定するためなら、どのような技術分野においても適用できるが、たとえば、銅製錬における自熔炉において、銅精鉱を供給する設備である貯槽内に貯留した精鉱のかさ比重を測定するための装置を例示できる。 The present invention relates to a bulk specific gravity measuring device and bulk specific gravity measuring method for storage in a storage tank. The bulk specific gravity measuring apparatus and bulk specific gravity measuring method of the present invention can be applied in any technical field as long as it measures the bulk specific gravity of a substance filled in a container. For example, in a flash smelting furnace in copper smelting, The apparatus for measuring the bulk specific gravity of the concentrate stored in the storage tank which is equipment which supplies concentrate can be illustrated.
乾式の銅製錬プロセスでは、まず自熔炉において、銅精鉱（以下、精鉱という）を精鉱バーナーで燃焼させることにより酸化させ、硫黄と鉄の一部を除去し、銅を含有したマットを生成させる。精鉱バーナーへの精鉱の供給には、貯槽下部に設けられたスクリューコンベアが用いられる。このとき平均粒径30μm程度の精鉱粒子群が空気を過度に含んだ状態になると、かさ比重が極端に低下して流体のようになり、スクリューコンベアの回転とは関係なく、流動化した精鉱が過剰に精鉱バーナーに供給されてしまうフラッシング状態となる。このような状態になると精鉱の供給量に対し、精鉱バーナー内で精鉱を燃焼させるための酸素が不足し、結果として未燃焼の精鉱が生じるため、原料である精鉱から回収できない銅量の増加など、各種の操業トラブルの原因となる。そのため貯槽内において精鉱粒子間から適度に空気を抜き、精鉱をフラッシングさせずに精鉱バーナーへ供給することが望まれる。 In the dry-type copper smelting process, first, copper concentrate (hereinafter referred to as concentrate) is burned with a concentrate burner in a flash furnace to oxidize, remove a part of sulfur and iron, and form a copper-containing mat. Generate. A screw conveyor provided at the bottom of the storage tank is used to supply concentrate to the concentrate burner. At this time, if the concentrate particle group with an average particle size of about 30 μm contains air excessively, the bulk specific gravity is extremely reduced to become a fluid, and the fluidized refined particles have no relation to the rotation of the screw conveyor. It becomes a flushing state in which the ore is excessively supplied to the concentrate burner. In such a state, oxygen for burning the concentrate in the concentrate burner is insufficient relative to the concentrate supply, resulting in unburned concentrate, which cannot be recovered from the raw concentrate. It causes various operational troubles such as an increase in the amount of copper. For this reason, it is desired that air is appropriately discharged from the concentrate particles in the storage tank and supplied to the concentrate burner without flushing the concentrate.
フラッシングを抑制する方法の一つとして連続切出しする貯槽内の精鉱を貯槽に投入されてからスクリューコンベアで切出されるまで一定時間滞留させ、精鉱粒子群から適度に空気を抜く方法が考えられる。この場合、どの程度滞留させればどの程度空気を抜くことができるか把握することが非常に重要である。その理由は、精鉱粒子群から空気を抜きすぎると精鉱が貯槽内で互いに密接して橋をかけ渡したような状態となり（これをブリッジという）、このブリッジが精鉱の流動を止めるので、貯槽内が閉塞状態に陥り、スクリューコンベアでの切り出しがなされず、操業が停止してしまう可能性があるからである。 As a method of suppressing flushing, a method of concentrating the concentrate in the storage tank that is continuously cut out from the concentrate after being put in the storage tank for a certain period of time until it is cut out by the screw conveyor, can be considered to remove air from the concentrate particle group appropriately. . In this case, it is very important to grasp how much air can be extracted if it is retained. The reason is that if the air is extracted too much from the concentrate particles, the concentrates will be in close contact with each other in the storage tank (this is called a bridge), and this bridge will stop the flow of concentrate. This is because there is a possibility that the inside of the storage tank falls into a closed state and the operation is stopped without being cut out by the screw conveyor.
実機では、貯槽内の精鉱において、主に深さ方向のかさ比重を測定することで精鉱粒子群に含まれる空気量を推定することができる。この貯槽内の精鉱のかさ比重分布を精鉱の滞留時間を変化させて測定することで、スクリューコンベアに安定して精鉱を定量供給するために適切な滞留時間を見出すことが可能となる。 In the actual machine, the amount of air contained in the concentrate particle group can be estimated mainly by measuring the bulk specific gravity in the depth direction in the concentrate in the storage tank. By measuring the bulk specific gravity distribution of the concentrate in this storage tank while changing the residence time of the concentrate, it becomes possible to find an appropriate residence time to stably supply the concentrate to the screw conveyor. .
特許文献１の従来技術では、連続操業中の粉体のかさ比重測定をつぎのようにして検出している。すなわち、金属粉末が入った容器の外部に設置した励磁コイルで交流磁束を印加し、検出コイルで検出された交流磁束の振幅と、前記金属粉末の見掛密度と交流磁束の振幅との相関関係について予め作成した検量線からかさ比重を測定している。 In the prior art of Patent Document 1, the bulk specific gravity measurement of powder during continuous operation is detected as follows. That is, an AC magnetic flux is applied by an excitation coil installed outside a container containing metal powder, and the correlation between the amplitude of the AC magnetic flux detected by the detection coil and the apparent density of the metal powder and the amplitude of the AC magnetic flux The bulk specific gravity is measured from a calibration curve prepared in advance.
しかるに、特許文献１の方法は、測定対象となる粉体は金属粉末に限定されるうえに、大掛かりな励磁コイルと検出コイルが必要となり、大規模な精鉱貯槽に適用するには費用や設備面で困難を伴う。またこの方法では、貯槽内におけるかさ比重の分布を測定するには分解能が低いため、広範囲の平均的なかさ比重しか測定できない。 However, in the method of Patent Document 1, the powder to be measured is limited to a metal powder, and a large excitation coil and a detection coil are required. There are difficulties in terms. Also, with this method, since the resolution is low for measuring the bulk specific gravity distribution in the storage tank, only a wide range of average bulk specific gravity can be measured.
本発明は上記事情に鑑み、あらゆる種類の貯槽内貯留物のかさ比重分布を容易かつ正確に測定できる測定装置および測定方法を提供することを目的とする。 An object of this invention is to provide the measuring apparatus and measuring method which can measure the bulk specific gravity distribution of the storage thing in all kinds of storage tanks easily and correctly in view of the said situation.
第１発明の貯留物のかさ比重測定装置は、貯槽内における貯留物のかさ比重の分布を測定するための測定装置であって、貯槽の上部から任意の粉体深さに挿入できるトルク棒と、該トルク棒を回転させる回転手段と、前記トルク棒に発生するトルクを検出するトルク計と、前記トルク棒に取付けられた抵抗体とからなることを特徴とする。
第２発明の貯留物のかさ比重測定装置は、第１発明において、前記トルク棒を回転自在に保持する保持枠と、該保持枠を貯槽へ挿入した状態で貯槽上部から縣垂させるための掛け渡しバーと、該掛け渡しバーを、前記保持枠の上下方向の複数個所で着脱自在に取付ける複数個所の取付け座とを備えることを特徴とする。
第３発明の貯留物のかさ比重測定装置は、第１または第２発明において、前記回転手段が、手動ハンドルであり、前記トルク計が、前記手動ハンドルに取付けられていることを特徴とする。
第４発明の貯留物のかさ比重測定装置は、第１、第２、または第３発明において、前記抵抗体が、形状および／または寸法の異なるものの数種からなり、各抵抗体が前記トルク棒に着脱自在に装着可能であることを特徴とする。
第５発明の貯留物のかさ比重測定方法は、第１ないし第４発明のいずれかにおいて、かさ比重測定装置を貯槽内の貯留物中に挿入し、任意に選択した深さにおいて、トルク棒を回転させてトルクを検出し、その検出値を検量線と照合することで、貯槽内の貯留物のかさ比重を推定することを特徴とする。
The bulk density measuring device of the storage of the first invention is a measuring device for measuring the distribution of bulk specific gravity of the storage in the storage tank, and a torque rod that can be inserted from the upper part of the storage tank to an arbitrary powder depth, And a rotating means for rotating the torque rod, a torque meter for detecting torque generated in the torque rod, and a resistor attached to the torque rod.
The bulk density measuring apparatus for stored matter according to a second aspect of the invention relates to the first aspect of the invention, a holding frame for rotatably holding the torque rod, and a hanging for hanging from the upper part of the storage tank while the holding frame is inserted into the storage tank. It is characterized by comprising a delivery bar and a plurality of attachment seats for removably attaching the delivery bar at a plurality of locations in the vertical direction of the holding frame.
According to a third aspect of the present invention, in the first or second aspect of the invention, the rotating means is a manual handle, and the torque meter is attached to the manual handle.
According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, the resistor comprises several types of resistors having different shapes and / or dimensions, and each resistor is the torque rod. It is characterized in that it can be detachably attached to.
The bulk specific gravity measurement method for a storage material according to a fifth aspect of the present invention is the method according to any one of the first to fourth aspects, wherein the bulk density measuring device is inserted into the storage material in the storage tank, and the torque rod is inserted at an arbitrarily selected depth. It is characterized by estimating the bulk specific gravity of the stored matter in the storage tank by detecting the torque by rotating and comparing the detected value with a calibration curve.
第１発明のかさ比重測定装置は、トルク棒と回転手段とトルク計と抵抗体とからなる簡易な構造であるため、持ち運びが容易であって、貯槽上部から挿入して回転手段でトルク棒を回転させるだけで、貯槽内の充填物のかさ比重を測定できる。
第２発明によれば、掛け渡しバーを貯槽上部の開口に渡し掛けるとトルク棒を保持する保持枠を貯槽内に挿入して懸垂支持できる。また、保持枠上に複数個設けられている取付け座に掛け渡しバーを付け替えることで、貯槽内部へのトルク棒の挿入深さを変えることができる。そのため、貯槽内での深さが異なる貯留物のかさ比重を測定することができる。
第３発明によれば、手動ハンドルを用いたものなので簡便な構成であり、持ち運びに便利である。
第４発明により抵抗体として形状および／または寸法の異なるものを数種用意しておくと、貯槽内貯留物の性状などに応じた抵抗体を使い分けできるので、正確にかさ比重を測定できる。
第５発明のかさ比重測定方法によれば、貯槽内の貯留物にトルク棒を挿入して抵抗体を回転させると、トルク値を検出できるので、金属を含むどのような粉状の貯留物でもかさ比重を測定できる。また、貯槽内貯留物における任意の深さのトルク値を検量線と照合することでかさ比重を推定できるので、この推定かさ比重値に基づき精鉱の適切な滞留時間を見出すことができる。このため、フラッシングや閉塞による操業トラブルを未然に防止できる。
The bulk specific gravity measuring device according to the first aspect of the present invention has a simple structure comprising a torque rod, a rotating means, a torque meter, and a resistor. The bulk specific gravity of the filler in the storage tank can be measured simply by rotating.
According to the second aspect of the present invention, when the spanning bar is spanned over the opening in the upper part of the storage tank, the holding frame for holding the torque rod can be inserted into the storage tank and suspended. Moreover, the insertion depth of the torque rod into the inside of the storage tank can be changed by replacing the spanning bar with a plurality of mounting seats provided on the holding frame. Therefore, it is possible to measure the bulk specific gravity of the reservoirs having different depths in the storage tank.
According to the third invention, since a manual handle is used, it has a simple structure and is convenient to carry.
If several types of resistors having different shapes and / or dimensions are prepared according to the fourth aspect of the invention, the resistors according to the properties of the storage in the storage tank can be used properly, and the bulk specific gravity can be measured accurately.
According to the bulk specific gravity measuring method of the fifth invention, since the torque value can be detected by inserting a torque rod into the storage in the storage tank and rotating the resistor, any powdered storage including metal can be detected. Can measure bulk specific gravity. Further, since the bulk specific gravity can be estimated by comparing the torque value at an arbitrary depth in the storage in the storage tank with the calibration curve, an appropriate residence time of the concentrate can be found based on the estimated bulk specific gravity value. For this reason, operational troubles due to flushing or blockage can be prevented in advance.
つぎに、本発明の実施形態を図面に基づき説明する。
まず、図１に基づき、かさ比重測定装置Ａの基本構成を説明する。
Next, an embodiment of the present invention will be described with reference to the drawings.
First, the basic configuration of the bulk specific gravity measuring apparatus A will be described with reference to FIG.
（かさ比重測定装置）
本実施形態のかさ比重測定装置Ａは、貯槽内における貯留物のかさ比重の分布を測定するための測定装置である。測定対象である貯槽内貯留物には、とくに制限はなく、金属および金属以外の物であってもよい。また、塊状物や粒状物、粉体などの性状をもつものを含む代表的には貯槽内に貯留した銅精鉱などのかさ比重測定に用いられる。
(Bulk specific gravity measuring device)
The bulk specific gravity measuring apparatus A of this embodiment is a measuring apparatus for measuring the distribution of bulk specific gravity of the stored matter in the storage tank. There is no restriction | limiting in particular in the storage in a storage tank which is a measuring object, A thing other than a metal and a metal may be sufficient. In addition, it is typically used for measuring the bulk density of copper concentrate or the like stored in a storage tank, including those having properties such as lump, granule and powder.
かさ比重測定装置Ａの構成は、トルク棒１と、このトルク棒１を回転させる回転手段である手動ハンドル２と、トルク棒１に発生するトルクを検出するトルク計３と、トルク棒に取付けられた抵抗体４とからなる。 The configuration of the bulk specific gravity measuring apparatus A is attached to the torque rod 1, a manual handle 2 which is a rotating means for rotating the torque rod 1, a torque meter 3 for detecting torque generated in the torque rod 1, and a torque rod. And the resistor 4.
前記トルク棒１を回転自在に保持するために保持枠５が設けられている。保持枠５の構成に、とくに制限はないが、図示の実施形態では２本のアングル材５ａ，５ａを平行に並べて互いに結合したものを用いている。保持枠５の上端部と下端部には軸受６，６を取付けており、トルク棒１を回転自在に支持している。 A holding frame 5 is provided to hold the torque rod 1 rotatably. The configuration of the holding frame 5 is not particularly limited, but in the illustrated embodiment, two angle members 5a and 5a are arranged in parallel and coupled to each other. Bearings 6 and 6 are attached to the upper end portion and the lower end portion of the holding frame 5, and the torque rod 1 is rotatably supported.
保持枠５には掛け渡しバー７を取付けている。この掛け渡しバー７は保持枠５を貯槽Ｂへ挿入した状態で貯槽上部の開口ｈから縣垂させるための部材である。この保持枠５の上下方向の複数個所には取付け座８が取付けられている。取付け座８は短いアングル材であり、保持枠５を構成する２本の長いアングル材５ａ，５ａを互いに固定すると共に掛け渡しバー７を取付ける部材でもある。 A spanning bar 7 is attached to the holding frame 5. This spanning bar 7 is a member for hanging from the opening h in the upper part of the storage tank while the holding frame 5 is inserted into the storage tank B. Mounting seats 8 are attached to a plurality of vertical positions of the holding frame 5. The mounting seat 8 is a short angle member, and is also a member for fixing the two long angle members 5a, 5a constituting the holding frame 5 to each other and attaching the spanning bar 7.
取付け座８に対し掛け渡しバー７はボルト・ナット等で着脱自在に取付けられる。そして、掛け渡しバー７を複数個所の取付け座８に付け替えることで、トルク棒１の貯槽Ｂへの挿入深さを任意に変えることができる。 The spanning bar 7 is detachably attached to the mounting seat 8 with bolts, nuts and the like. And the insertion depth to the storage tank B of the torque stick | rod 1 can be arbitrarily changed by changing the spanning bar 7 to the attachment seat 8 of several places.
トルク棒１の上端には角ヘッド１ａが形成されている。角ヘッド１ａは回転手段である手動ハンドル２の先端を嵌めて回転トルクを伝えるための部材である。角ヘッド１ａの形状にはとくに制限はなく、四角形や六角形のヘッド形状でよい。
手動ハンドル２は、その先端に角ヘッド１ａに合致する嵌合凹部２ａを備えており、角ヘッド１ａに嵌合凹部を嵌めて、手で手動ハンドル２を回わすと、トルク棒１を回わすことができる。
A square head 1 a is formed at the upper end of the torque rod 1. The square head 1a is a member for transmitting the rotational torque by fitting the tip of the manual handle 2 which is a rotating means. The shape of the square head 1a is not particularly limited, and may be a square or hexagonal head shape.
The manual handle 2 has a fitting recess 2a that matches the square head 1a at the tip thereof. When the fitting handle is fitted in the square head 1a and the manual handle 2 is turned by hand, the torque rod 1 is turned. be able to.
本実施形態において、回転手段は手動ハンドル２であるが、これに限られるものではなくモータ駆動の回転手段も採用される。
また、トルク計３は手動ハンドル２に予め付設されているものを用いると、正確に手動ハンドル２に生ずるトルクを計測することができる。ただし、本発明においてトルク計３は予め付設されたものに限ることなく、使用時にそのつど取付けるものであってもよい。
In the present embodiment, the rotating means is the manual handle 2, but is not limited to this, and a motor-driven rotating means is also employed.
In addition, when the torque meter 3 attached to the manual handle 2 in advance is used, the torque generated in the manual handle 2 can be accurately measured. However, in the present invention, the torque meter 3 is not limited to the one provided in advance, and may be attached each time it is used.
トルク棒１には抵抗体４が取付けられる。抵抗体４の取付け位置は貯槽内で貯留物に接触する位置であればよいが、一般的にはトルク棒１の下端に取付けられる。 A resistor 4 is attached to the torque rod 1. The resistor 4 may be attached to the lower end of the torque rod 1 in general, as long as the resistor 4 is attached to the reservoir in the storage tank.
抵抗体４のトルク棒１への取付けは、固定的なものでもよく着脱可能な形式でもよい。着脱可能にするには、抵抗体４に孔を穿孔しておき、トルク棒１の下端に雌ネジを形成しておいて、トルク棒１の雌ネジ部を抵抗体４の孔に挿入しナットで締結する等の手段を例示できるが、これに限らず、任意の取付け手段を採用することができる。
このように着脱可能にしておくと、数種類の抵抗体４を用意しておき、貯留物の性状等に応じて付け替えが可能となる。
Attachment of the resistor 4 to the torque rod 1 may be fixed or detachable. To make it detachable, a hole is drilled in the resistor 4, a female screw is formed at the lower end of the torque rod 1, and the female screw portion of the torque rod 1 is inserted into the hole of the resistor 4 and a nut However, the present invention is not limited to this, and any attachment means can be employed.
If it is made removable in this way, several types of resistors 4 are prepared and can be changed according to the properties of the stored matter.
図２は、抵抗体４の代表的なものを示している。
符号４ａは角棒状の抵抗体である。
符号４ｂは厚板に数個の孔を穿孔したものである。
符号４ｃは三角棒状のものであり、旋回方向前方が鋭角となっている。
符号４ｄは丸棒状のものである。
FIG. 2 shows a typical resistor 4.
Reference numeral 4a is a rectangular bar-shaped resistor.
Reference numeral 4b is a plate in which several holes are drilled.
Reference numeral 4c is a triangular bar shape, and the front in the turning direction has an acute angle.
Reference numeral 4d denotes a round bar.
上記のように、前記抵抗体４が、形状および／または寸法の異なるものの数種からなり、各抵抗体４ａ〜４ｄがトルク棒１の下端に着脱自在に装着可能であると、貯槽内充填物の性状などに応じた抵抗体を使い分けできるので、正確にかさ比重を測定できる。 As described above, when the resistor 4 is composed of several types having different shapes and / or dimensions, and each of the resistors 4a to 4d can be detachably attached to the lower end of the torque rod 1, the filling in the storage tank It is possible to measure the bulk specific gravity accurately because the resistor can be used properly according to the properties of the material.
（かさ比重測定方法）
つぎに、かさ比重測定装置Ａを用いた測定方法を説明する。
図５に示すようにかさ比重測定装置Ａを貯槽上部の開口ｈ（点検孔等）から貯槽内に挿入する。掛け渡しバー７を貯槽Ｂ上面の受け具１１に嵌めて、回転を不能に拘束する。挿入深さは任意に選択してよいが、一般的には最も深く挿入しておいてから、一定距離づつ引き上げていくのが、操作が容易に行えるので好ましい。この場合の各挿入深さは、掛け渡しバー７を適宜の位置の取付け座８に付け替えることで容易に変更することができる。
(Bulk specific gravity measurement method)
Below, the measuring method using the bulk specific gravity measuring apparatus A is demonstrated.
As shown in FIG. 5, the bulk specific gravity measuring device A is inserted into the storage tank through an opening h (inspection hole or the like) at the top of the storage tank. The spanning bar 7 is fitted to the holder 11 on the upper surface of the storage tank B, and the rotation is restrained to be impossible. The insertion depth may be arbitrarily selected, but in general, it is preferable to insert the deepest and then pull it up by a certain distance because the operation can be easily performed. Each insertion depth in this case can be easily changed by replacing the transfer bar 7 with the mounting seat 8 at an appropriate position.
トルク棒１を任意に選択した深さにおいて、トルク棒１を手動で回転させる。加えた回転トルクにより、回転初期はトルク棒１に若干ねじれが生じる。さらに回転トルクを加えると、トルク計３で計測されるトルク値は漸増していくが、抵抗体４周辺の精鉱が抵抗体４の回転しようとする力に抗いきれなくなった段階で、トルク値は一定または若干低下して抵抗体４はスムーズに回転するようになる。この一連の操作中における最大トルク値は、回転前の抵抗体４周辺の精鉱かさ比重に関係したトルク値となる。 The torque rod 1 is manually rotated at a depth selected arbitrarily. Due to the applied rotational torque, the torque rod 1 is slightly twisted at the initial stage of rotation. When the rotational torque is further applied, the torque value measured by the torque meter 3 gradually increases. However, when the concentrate around the resistor 4 cannot resist the force that the resistor 4 tries to rotate, the torque value is increased. Becomes constant or slightly lower, and the resistor 4 rotates smoothly. The maximum torque value during this series of operations is a torque value related to the concentrate bulk specific gravity around the resistor 4 before rotation.
上記のようにトルク計３で計測されたトルク検出値を検量計と照合することで、貯槽内の貯留物のかさ比重を推定することができる。
上記の方式でかさ比重を推定するには、予め検量線を用意しておく必要がある。そのために、図３に示すように、かさ比重が異なる精鉱が入った試験セルＣ内で抵抗体４を回転させ、抵抗体４回転時のトルク値を測定し、そのトルク値に対するかさ比重の関係、すなわち検量線を実用上必要な範囲で作成しておく。検量線の一例を図４に示す。この検量線に貯槽内で測定したトルク値を照合することで、貯槽内のかさ比重を推定することができる。
By comparing the torque detection value measured by the torque meter 3 with the calibration meter as described above, the bulk specific gravity of the stored matter in the storage tank can be estimated.
In order to estimate the bulk specific gravity by the above method, it is necessary to prepare a calibration curve in advance. For this purpose, as shown in FIG. 3, the resistor 4 is rotated in a test cell C containing concentrates having different bulk specific gravity, the torque value at the time of rotating the resistor 4 is measured, and the bulk specific gravity relative to the torque value is measured. A relationship, that is, a calibration curve is created in a practically necessary range. An example of a calibration curve is shown in FIG. By comparing the calibration curve with the torque value measured in the storage tank, the bulk specific gravity in the storage tank can be estimated.
検量線の作成はつぎの要領で行える。
図３に示すような、200mm角で高さ500mmの透明な樹脂製試験セルＣ内に本発明のかさ比重測定装置Ａの抵抗体４部分を設置してから、その試験セルＣ内に10kgの精鉱を投入し、精鉱かさ比重1.7から2.2の範囲で回転トルク値を測定することで、図４に示すような検量線を作成できる。精鉱かさ比重は、試験セルＣ内の鉱層高さを測定し、そこから算出される体積から推定できる。
A calibration curve can be created as follows.
As shown in FIG. 3, after placing the resistor 4 portion of the bulk density measuring apparatus A of the present invention in a transparent resin test cell C having a 200 mm square and a height of 500 mm, 10 kg is placed in the test cell C. A calibration curve as shown in FIG. 4 can be created by introducing the concentrate and measuring the rotational torque value in the range of the concentrate bulk specific gravity of 1.7 to 2.2. The concentrate bulk specific gravity can be estimated from the volume calculated from the height of the ore layer in the test cell C.
本発明のトルク式かさ比重測定装置Ａは、主にトルク棒１と保持枠５等で構成されているため持ち運びが簡便である。また、トルク棒１の先端に取り付ける各抵抗体４ごとにかさ比重が既知の精鉱でトルクを事前に測定して検量線を作成しておくことにより、他の方法では困難である精鉱貯槽内の精鉱かさ比重分布を容易に測定することが可能である。その結果、フラッシングや閉塞による操業トラブルを極力抑えられる精鉱の滞留時間を見出すことができる。 Since the torque type bulk specific gravity measuring apparatus A of the present invention is mainly composed of the torque rod 1 and the holding frame 5 and the like, it is easy to carry. Further, by preparing a calibration curve by measuring the torque in advance with a concentrate having a known bulk specific gravity for each resistor 4 attached to the tip of the torque rod 1, a concentrate storage tank that is difficult with other methods. It is possible to easily measure the concentrate bulk density distribution. As a result, it is possible to find a concentrate retention time that can minimize operational troubles due to flushing and blockage.
図５は実験に用いた実機貯槽Ｂである。この貯槽の寸法は図６に示すように、幅Ｗが4m、奥行きＤが2m、高さＨが5mであり、上半分の垂直部分ｈ１が2.5m、下半分のテーパ部分ｈ２が2.5mである。このようなホッパー形状である貯槽Ｂにおいて、下部のスクリューコンベアＳから銅精鉱を60t/hのペースで連続排出しつつ、同量を貯槽上部から供給することで、銅精鉱の鉱層高さｄを4mに維持した状態とする。そのうえで貯槽Ｂ内の精鉱かさ比重を本発明のかさ比重測定装置Ａを用いて測定した。 FIG. 5 is an actual machine storage tank B used in the experiment. As shown in FIG. 6, this storage tank has a width W of 4 m, a depth D of 2 m, a height H of 5 m, an upper half vertical portion h1 of 2.5 m, and a lower half taper portion h2 of 2.5 m. is there. In such a hopper-shaped storage tank B, the copper concentrate is continuously discharged from the lower screw conveyor S at a pace of 60 t / h, and the same amount is supplied from the upper part of the storage tank. d is maintained at 4 m. Then, the concentrate bulk specific gravity in the storage tank B was measured using the bulk specific gravity measuring apparatus A of the present invention.
貯槽天板の点検孔ｈから長さ150m、高さ10mmの抵抗体４が付いたかさ比重測定装置Ａを鉛直方向に精鉱内に挿入した。精鉱表面から0.6m下の位置において測定した最大トルクは50[kgf・cm]だった。その結果を検量線に照合して推定された精鉱のかさ比重は2.1だった。また精鉱表面から1.6m下の位置でも同様に測定した最大トルクは60[kgf・cm]で、この測定値から推定されるかさ比重は2.2だった。 A bulk specific gravity measuring device A with a resistor 4 having a length of 150 m and a height of 10 mm was inserted into the concentrate vertically from the inspection hole h of the storage tank top plate. The maximum torque measured at a position 0.6 m below the concentrate surface was 50 [kgf · cm]. The bulk specific gravity of the concentrate was estimated by collating the results with a calibration curve and was 2.1. The maximum torque measured in the same way at a position 1.6 m below the concentrate surface was 60 [kgf · cm], and the bulk specific gravity estimated from this measurement was 2.2.
容器の中に貯留物をできるだけ詰めて空気を残してないときの密度であるタップ密度は2.3であることから、それよりも若干空気を含んだ状態であると推察される。前述した形状の貯槽において、このようなかさ比重分布の場合、フラッシングや閉塞を発生させずに、貯槽から安定的にスクリューコンベアへ精鉱を供給することができることが分かった。 Since the tap density, which is the density when the reservoir is packed as much as possible in the container and no air is left, is 2.3, it is presumed that the air contains a little more air than that. In the storage tank having the above-described shape, it has been found that in the case of such a bulk specific gravity distribution, concentrate can be stably supplied from the storage tank to the screw conveyor without causing flushing or blockage.
本発明によれば、貯槽内に貯留した精鉱のかさ比重をはじめとして、種々の技術分野における貯槽内の金属あるいは金属以外の貯留物のかさ比重を簡便かつ正確に測定することができる。 ADVANTAGE OF THE INVENTION According to this invention, the bulk specific gravity of the metal in the storage tank in various technical fields including the bulk specific gravity of the concentrate stored in the storage tank or a non-metal bulk specific gravity can be measured easily and correctly.
Ａ かさ比重測定装置
Ｂ 貯槽
Ｃ 試験セル
Ｓ スクリューコンベア
１ トルク棒
２ 手動ハンドル
３ トルク計
４ 抵抗体
５ 保持枠
６ 軸受
７ 掛け渡しバー
８ 取付け座
A Bulk specific gravity measuring device B Storage tank C Test cell S Screw conveyor 1 Torque rod 2 Manual handle 3 Torque meter 4 Resistor 5 Holding frame 6 Bearing 7 Crossing bar 8 Mounting seat
Claims (5)
貯槽の上部から任意の粉体深さに挿入できるトルク棒と、
該トルク棒を回転させる回転手段と、
前記トルク棒に発生するトルクを検出するトルク計と、
前記トルク棒に取付けられた抵抗体とからなる
ことを特徴とする貯留物のかさ比重測定装置。 A measuring device for measuring the distribution of bulk specific gravity of stored matter in a storage tank,
A torque rod that can be inserted at any powder depth from the top of the storage tank;
Rotating means for rotating the torque rod;
A torque meter for detecting torque generated in the torque rod;
An apparatus for measuring bulk specific gravity of a reservoir comprising a resistor attached to the torque rod.
該保持枠を貯槽へ挿入した状態で貯槽上部から縣垂させるための掛け渡しバーと、
該掛け渡しバーを、前記保持枠の上下方向の複数個所で着脱自在に取付ける複数個所の取付け座とを備える
ことを特徴とする請求項１記載の貯留物のかさ比重測定装置。 A holding frame for rotatably holding the torque rod;
A spanning bar for hanging from the upper part of the storage tank with the holding frame inserted into the storage tank;
2. The bulk specific gravity measuring apparatus for storage according to claim 1, further comprising a plurality of mounting seats for removably mounting the spanning bar at a plurality of positions in the vertical direction of the holding frame.
前記トルク計が、前記手動ハンドルに取付けられている
ことを特徴とする請求項１または２記載の貯留物のかさ比重測定装置。 The rotating means is a manual handle;
3. The bulk specific gravity measuring device for a storage according to claim 1, wherein the torque meter is attached to the manual handle.
各抵抗体が前記トルク棒に着脱自在に装着可能である
ことを特徴とする請求項１、２または３記載の貯留物のかさ比重測定装置。 The resistor is composed of several types having different shapes and / or dimensions,
4. The bulk specific gravity measuring device for stored matter according to claim 1, wherein each resistor is detachably attachable to the torque rod.
任意に選択した深さにおいて、トルク棒を回転させてトルクを検出し、
その検出値を検量線と照合することで、貯槽内の貯留物のかさ比重を推定する
ことを特徴とする貯留物のかさ比重測定方法。 The bulk specific gravity measuring device according to any one of claims 1 to 4 is inserted into a storage in a storage tank,
Rotate the torque rod to detect torque at an arbitrarily selected depth,
By you matching the detected value with a calibration curve, the bulk specific gravity measuring method depot, characterized in that estimating the bulk density of the reservoir of the reservoir.
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