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洗礦機在銅礦選礦中能起到什么作用?/What role can washing machine play in copper ore dressing?

來源: 時間:2018-01-10 08:41:48 次數:

1.銅的性質:銅是一種性質柔軟的金屬,莫氏硬度為3。純銅在20℃時密度為8.89克/厘米3,商品銅因加工方法和雜質含量不同密度也不同,一般為8.3~ 8.89克/厘米3,熔融銅的密度為8.22克/厘米3。純銅具有高度的延展性,容易鍛壓,既可壓延成很薄的銅片,也可拉成很細的銅絲。鑄造銅或冷拉銅的抗張強度為42~ 50千克/毫米2,經退火處理后則減低至21~28千克/毫米2。銅的熔點為1033℃,熔化熱為205 .15焦/克,沸點通常為2310℃。若將銅在空氣中加熱至700℃,有揮發現象,接近熔點時,便揮發。但在普通熔爐中,錒很難揮發,所以錒熔煉時因揮發而造成的損失不大。液體銅的熱容為31.4焦/K克原子或0.452焦/K克。

   銅的導熱率略低于銀。若把銀的導熱率作為1,則銅為0.736。導熱率與銅本身的組織純度和溫度有關;經延展處理的銅導熱性較鑄銅更好,但雜質的存在及溫度的增加使導熱率減低。純銅是電的良導體,其導電率僅次于銀,但遠遠超過所有其他金屬。銅的導電率與其長短、粗細、組織、純度及本身溫度等都有關系。凡短、粗、晶粒大、品質純且溫度又低的銅件,其導電率,反之則低。微量的雜質,對銅的導電率有決定性影響,砷和銻是精煉銅中常含有的雜質,對銅的導電率危害極大,0.0013%的砷或0.0017%的銻,可使銅的導電率降低1%。雖然銅在干燥空氣中不起變化,但在有C02存在的濕空氣中,其表面便生成一層有毒的銅綠,成分是堿式碳酸銅( CuC03 Cu( OH)-,)。但在空氣中加熱至185℃以上時,即開始氧化,并于200℃變為玫瑰色,300℃成黃銅色,350℃成藍綠色,在365℃以上則顯暗色。銅在赤熱時會發生一層黑垢覆蓋其上,垢的外部由黑色Cu0組成,內部則為Cu70;此垢可借彎曲及淬火處理與銅分離。在電位次序中,銅位于氫之后,不能從酸中置換氫。鹽酸及稀硫酸與銅不起作用,但有空氣中的氧存在時,銅則溶解并生成相應的鹽。銅能與氧、硫、鹵素等元素直接化合,在常溫下作用緩慢,加熱時劇烈。銅能溶于王水。

   (2)銅的用途:銅是一種重要的有色金屬,近些年來銅的用途越來越廣泛,在現代許多工業部門中,銅已經成為不可缺少的金屬,它的應用僅次于鋼和鐵。

   銅的導電率高,僅次于銀,而銅的價格較銀低廉,因此銅在電器,電子技術,電機制造

等工業部門中應用廣,用量。銅的導熱性能好,在金屬中,僅次于銀和金居第三位,其導熱率為銀的73%,因此常常用銅來制造加熱器,冷凝器,熱交換器等。銅的延展性能好,易于成型和加工,因此在飛機、船舶、汽車等制造業多用來生產各種零部件。銅的耐蝕性較強,鹽酸和稀硫酸與銅不起作用,因此在化學、制糖、釀酒工業中多用銅來制造真空器、蒸餾器,釀造鍋閥門、管道等。銅能與鋅、錫、鋁、鎳、鈹等許多金屬組成各種重要的合金。銅與鋅的合金(黃銅)以及銅與錫的合金(青銅)廣泛地應用在各種工業部門,尤其是在機械工業中用來制造軸瓦,活塞,閥門,油管、熱交換器等各種零部件。銅與鋁可以各種比例組成合金,其中以銅為主的合金叫鋁青銅,鋁青銅抗震性強,可用來制造需要強度及韌性的鑄件。這種合金的另一優點是比黃銅或錫青銅要輕10~15%。

   在銅和鎳的合金中,的是含鎳67%、含銅33%的蒙乃爾合金。此種合金以抗蝕性強著稱,而且即使把它加熱至高溫,其強度仍可保持極大限度。因此,蒙乃爾合金比其他銅基合金或普通銅都更優良。這種合金主要用于閥、泵、高壓蒸汽設各及其他許多器具的制造。

   現在就簡單介紹一下洗礦機廣泛應用于建筑工地、沙石廠、水電站混凝土大壩工地等多種行業,它具有洗凈度高,結構合理,處理量大,功耗小,洗凈度高。其洗在沙過程中沙子流失少,尤其是傳動部分均與水、沙隔離,故其故障率大大低于,是目前常用洗礦機,也是國內洗沙行業升級換代的選擇。物料由機器上部垂直落入高速旋轉的葉輪內,在高速離心力的作用下,與另一部分以傘狀形流在葉輪四周的物料產生高速撞擊與粉碎,物料在互相撞擊后,又會在葉輪和機殼之間以物料形成渦流多次的互相撞擊、摩擦而粉碎,從下部直通排出,形成閉路多次循環,由篩分設備控制達到所要求的成品粒度。  

   螺旋洗礦機又稱螺旋洗石機主要用于沙類產品的去除雜質(如粉塵)的機器,因較多吃啊用水洗的方法,故成為洗石機。 采用技術,結合國內沙石行業實際情況研制的洗沙設備,螺旋洗礦機具有洗凈高度,結構合理,產量大,洗沙過程中沙子流失少,尤其是其傳動部分均與水、沙隔離,故其故障率大大低于目前常用洗礦機,代替了老式鏈斗清洗設備,是洗礦機用戶的選擇。

   螺旋洗礦機工作時,電機通過三角帶、減速機、齒輪減速后帶動葉輪緩慢轉動,沙石有給料槽進入洗槽中,在葉輪的帶動下翻滾,并互相研磨,除去覆蓋沙石表面的雜質,同時破壞包覆沙粒的水汽層,以利于脫水;同時加水,形成強大水流,及時將雜質及比重小的異物帶走,并從溢出口洗槽排出,完成清洗作用。干凈的沙石由葉片帶走,后沙石從旋轉的葉輪倒入出料槽,完成沙石的清洗作用。

1. Properties of copper: copper is a soft metal with a Mohs hardness of 3. The density of pure copper is 8.89g/cm3 at 20 ℃, the density of commercial copper is also different due to different processing methods and impurity content, generally 8.3-8.89g/cm3, and the density of molten copper is 8.22g/cm3. Pure copper is highly malleable and easy to forge. It can be rolled into very thin copper strip or drawn into very thin copper wire. The tensile strength of cast copper or cold drawn copper is 42-50 kg / mm2, and it is reduced to 21-28 kg / mm2 after annealing. The melting point of copper is 1033 ℃, the melting heat is 205.15 J / g, and the boiling point is usually 2310 ℃. If copper is heated to 700 ℃ in the air, it will volatilize when it is close to the melting point. However, it is difficult to volatilize actinium in ordinary furnaces, so the loss caused by volatilization is small. The heat capacity of liquid copper is 31.4 joules / kg atom or 0.452 joules / kg.
The thermal conductivity of copper is slightly lower than that of silver. If the thermal conductivity of silver is 1, copper is 0.736. The thermal conductivity is related to the structure purity and temperature of copper itself. The thermal conductivity of copper treated by extension is better than that of cast copper, but the existence of impurities and the increase of temperature reduce the thermal conductivity. Pure copper is a good conductor of electricity, its conductivity is second only to silver, but far more than all other metals. The conductivity of copper is related to its length, thickness, structure, purity and temperature. The copper parts with short, coarse, large grain, pure quality and low temperature have the highest conductivity, and vice versa. Trace impurities have a decisive influence on the conductivity of copper. Arsenic and antimony are the impurities often contained in refined copper, which do great harm to the conductivity of copper. 0.0013% arsenic or 0.0017% antimony can reduce the conductivity of copper by 1%. Although copper does not change in the dry air, a layer of toxic copper green is formed on the surface of copper carbonate in the wet air with C02, which is composed of basic copper carbonate (cuc03 Cu (OH) -. However, when heated to above 185 ℃ in the air, it begins to oxidize and becomes rose color at 200 ℃, brass color at 300 ℃, blue-green color at 350 ℃, and dark color at above 365 ℃. Copper will be covered by a layer of black scale when it is red hot. The outer part of the scale is composed of black Cu0 and the inner part is cu70. The scale can be separated from copper by bending and quenching. In the potential sequence, copper can not replace hydrogen from acid after hydrogen. Hydrochloric acid and dilute sulfuric acid do not work with copper, but in the presence of oxygen in the air, copper dissolves and forms corresponding salts. Copper can be directly combined with oxygen, sulfur, halogen and other elements, and its action is slow at room temperature and violent when heated. Copper is soluble in aqua regia.
(2) use of copper: copper is an important non-ferrous metal. In recent years, copper has been used more and more widely. In many modern industrial sectors, copper has become an indispensable metal, and its application is only inferior to steel and iron.
Copper has a high conductivity, second only to silver, and its price is lower than silver. Therefore, copper is used in electrical appliances, electronic technology, and motor manufacturing
And other industrial sectors are the most widely used and the largest consumption. Copper has good thermal conductivity, next to silver and gold in the third place, and its thermal conductivity is 73% of silver. Therefore, copper is often used to make heaters, condensers, heat exchangers, etc. Copper has good ductility and is easy to form and process, so it is widely used to produce various parts in aircraft, ship, automobile and other manufacturing industries. Copper has strong corrosion resistance, hydrochloric acid and dilute sulfuric acid do not work with copper, so copper is often used to make vacuum, distiller, brewing pot valve, pipeline, etc. in the chemical, sugar and brewing industries. Copper can form various important alloys with zinc, tin, aluminum, nickel, beryllium and many other metals. Copper and zinc alloy (brass) and copper and tin alloy (bronze) are widely used in various industrial sectors, especially in the mechanical industry to manufacture bearing shells, pistons, valves, oil pipes, heat exchangers and other parts. Copper and aluminum can form alloys in various proportions, among which the alloy mainly composed of copper is called aluminum bronze, which has strong seismic resistance and can be used to make castings requiring strength and toughness. Another advantage of this alloy is that it is 10-15% lighter than brass or tin bronze.
Among the alloys of copper and nickel, the most famous one is Monel alloy containing 67% nickel and 33% copper. This alloy is known for its strong corrosion resistance, and even if it is heated to high temperature, its strength can still be maintained to a great extent. Therefore, Monel alloy is superior to any other copper base alloy or common copper. This alloy is mainly used in the manufacture of valves, pumps, high-pressure steam equipment and many other appliances.
Now I will briefly introduce that the ore washing machine is widely used in various industries such as construction site, sandstone plant, concrete dam site of hydropower station, etc. it has high cleaning degree, reasonable structure, large processing capacity, small power consumption and high cleaning degree. In the process of sand washing, the loss of sand is less, especially the transmission part is isolated from water and sand, so its failure rate is much lower than that of the current common ore washing machine, which is also the best choice for upgrading the domestic sand washing industry. The materials fall vertically into the high-speed rotating impeller from the upper part of the machine. Under the action of high-speed centrifugal force, they collide and smash with the materials around the impeller in the form of umbrella flow. After the materials collide with each other, they will collide and rub with each other for many times between the impeller and the shell, and then they will be discharged directly from the lower part, forming a closed circuit and multiple cycles, It is controlled by the screening equipment to reach the required particle size of the finished product.
Spiral washing machine, also known as spiral washing machine, is mainly used to remove impurities (such as dust) from sand products. Because of the method of washing with water, it becomes a washing machine. Mining

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