High and local overheating of the circulating water system

Security: sodium molybdate toxic , but low toxicity compounds. Kekai molybdenium poisoning can cause joint pain,Cause low blood pressure and blood pressure fluctuations , neurological disorders, metabolic processes obstacles. Soluble

Molybdenum compounds aerosol maximum allowable concentration of 2mg / m, the dust is 4mg / m. Access to and use of molybdenum alloys When sodium required to wear protective equipment . Pay attention to moisture . Transportation beware of rain, sun Uses: used in the manufacture of alkaloids , ink , fertilizers , molybdenum red pigment and pigment Fast precipitant Metal catalyst , molybdenum bar salts , can also be used to make flame retardant and suppression of pollution- water system Preparation , also used as galvanizing , polishing agents and chemical reagents.

The use of sodium molybdate disk

Kekai molybdenum disk low toxicity , low pollution levels of environmental pollution , is a novel application of more Water treatment agent . In order to obtain a better release effect , molybdenium often with polyphosphates, grapesSugar, salt , zinc , BTA complex to use , so not only can reduce copper molybdenum make Dosage, but also improve corrosion effect , the amount of the complex molybdates by 200 ~ 500mg / LDecreased to 4 ~ 6mg / L. Molybdate film process, dissolved oxygen must be present, withou mCalcium ( or other divalent metal ion

 s ) .

Status of foreign molybdenum wire ore beneficiation

Molybdenum concentrate leaching
Some get a molybdenum concentrate plant , copper , lead, iron

and other impurities substandard . According to the U.S.

Climax Molybdenum Company's quality molybdenum concentrate

quality standards : MoS2 should be 95%, Cu should be less

than 0.15%, Pb should be less than 0.05%. In the

international market , quality almost, prices sent many ,

such as the company's high-quality molybdenum concentrate

price of 1 July 1975 was $ 2.43 / lb , unqualified to $ 2.236

/ lb, the race to 2.5 ~ 17 %. In order to reduce the content

of these metals , and some plant using different leaching

process .
    Brenda plant concentrate containing 55.3% molybdenum

grade is relatively high , but the content of copper and lead

undesirable . To this end , the plant uses the Noranda

company developed the leaching process to reduce impurities

to improve the quality of concentrate . This process is the

principles and methods : copper chloride, ferric chloride

leaching of molybdenum oxide and calcium solution of Cu, Ca

and Pb cupric chloride and ferric chloride ( the amount of

103 and 41 g , respectively / t of concentrate ) in a sodium

chloride solution containing 20 to 30% of the chalcopyrite

and galena effective chlorinating agent , calcium chloride or

sodium chloride to reduce the PH value , and to increase

Boiling Point ( 4850 feet elevation Brenda located on the

leaching requires a higher boiling point ) , shorten the

leaching time . Brenda most effective plant molybdenum

leaching solution containing 1% of cupric chloride, ferric

chloride, 10% and 30 % calcium chloride . Leaching at 2 hours

at 100 ℃ , can Cu, Pb leaching rate of 98%, Ca leaching rate

of 79% is dissolved molybdenum is less than 0.5% . Used

leachate chlorine gas can be quickly regenerated. After each

batch leaching let go 30% of the leaching solution , in order

to control the leaching solution of copper and lead harmful

elements. After leaching the copper content of molybdenum

concentrate fell to 0.063 percent from 0.337 percent lead

content to 0.05 % molybdenum grade increased from 55.3% to

56.6%. After cooling the concentrate , and this was washed

twice ( including filtration and recycled pulp ) through ,

and a final filtration and dried .
    Valencia Rita plant selection molybdenum concentrate

containing 47 to 48% molybdenum , copper contained in order

to further remove , to improve the quality , the plant uses a

ferrous chloride leaching . The first process is filtered and

dried to molybdenum temperature 2% , and ferrous chloride

leaching of copper leaching solution ( 2.5 ~ 3.0% ) ,

molybdenum up to grade 53 to 54 %. After the concentrate

leaching and filtered again and dried , and within 2 meters

of the roaster roasting ф.16 give trioxide, 60 to 61 percent

of its grades , less than 1% sulfur , into the alloy

preparation plant molybdenum iron. Cologne plant in order to

reduce the copper content of molybdenum , using sodium

chloride leaching, the product is filtered and then dip the

slurry , and then sent to acid leaching , in order to further

reduce the amount of copper , molybdenum acid leaching after

final filtered and dried.

One kind of tungsten sheet

One kind of tungsten carbide - cobalt or Kekai tungsten carbide rod - cobalt - chromium in the thermal spraying powder production method,The present invention relates to a WC - Co or WC - Co - Cr thermal spray powder for preparing the powder or the tungsten carbide powder and cobalt powder, cobalt powder and chromium powder mixed in a certain ratio to prepare a slurry , spray granulation, the granulated powder is sieved and degreased in a vertical rapid sintering temperature sintering furnace , the body movement pattern of the powder falling through the continuous and uniform heating and cooling zones , and heating to complete the sintering zone , the protective atmosphere : nitrogen, sintering temperature : 1000 ~ 1700 ℃, sintering time : 0.1 ~ 5s, finally sintered powder required for grading and screening . The invention solves the spherical tungsten carbide rods -based composite thermal spray powder using the presence of long production cycle, low productivity and energy consumption and other problems when traditional methods of preparation ; present invention , the process is simple , continuous production , energy saving and environmental protection, the resulting powder composition uniformity , high sphericity and liquidity , and can be widely used in aerospace , machinery manufacturing , and petroleum and chemical industry.

technology molybdenium wire

Nature of Kekai Tungsten & Molybdenum technology molybdenium and tungsten is very close to the boiling point and highlight its conductive properties , linear thermal expansion coefficient

The number is small, compared with the tungsten easier processing.
    Thermal conductivity metal screen with the best match to the specific heat , making thermal shock and thermal fatigue

Natural selection , after which the melting point of tungsten , but the density is smaller and therefore the strength of

Greater than tungsten and other metals in the application of the weight of several key requirements , the more effective. molybdenum alloys in order

Before two hundred people have high degrees of strength.
     The main drawback is the mother of poor oxidation resistance above six hundred degrees Celsius rapid oxidation

And poor ductility at room temperature . To avoid weaknesses, using high-temperature oxidation coating ways to control the problem ,

For that is the lack of generally low temperature embrittlement said too poor plasticity , the strengthening Canadian people by alloy

Carbides and other measures to strengthen the resolve to achieve .

Advantages of tungsten sheet fish pendant

Tungsten alloy fish pendant density, making it significantly smaller than conventional lead fish pendant. As the body Small size, so only need to spend some fish pendant. tungsten machined parts pellets higher hardness than lead , not card Main fish jawbone . The shape can be maintained more durable . High density tungsten alloy makes fishing becomes more Plus simple . Tungsten alloy pellets and sensitive , allowing you to easily feel what or with your Bait hit something, such as bushes , rocks , mud and so on. Lead is toxic and causes environmental pollution . Tungsten has the advantage of non-toxic and pollution-free , the Tungsten has replaced the lead, making it an ideal material for fishing sinkers .

Tungsten sheet alloy saw blade

Cold rolled metal saw blade is also referred to as "cold saw", used for cutting steel, the steel under the status of the material of the Kekai Tungsten & Molybdenum technology tungsten weights of the circular saw blade. Using silver welding materials of hard alloy cutter welding in cutting out tooth plate peripheral department, carbide cutter grinding is suitable for the style by cutting material. According to the purposes are divided into regrinding and TA (one-time) two kinds. Ever is to use known as feng hacksaw (HSS circular saw blade), band sawing machine, band saw blade, (are in high speed tool steel as raw materials), but there is difference of tungsten wires efficiency, (cannot fast cutting), short service life of cutting tools. In order to solve these problems, developed in circular saw blade part of the welding head. Now, this kind of tungsten plate saw blade is becoming the mainstream of the metal material cutting. In particular, can carry on the processing, only a small amount of coolant and saw blade is easy to manage a one-time TA cold saw increasing tendency at home and abroad very quickly. Due to steel as the core of the heavy industry, automobile parts processing industry and metal processing industry, requires cutting solid steel bar, the raw material such as iron, stainless steel rods, currently used metal circular saw blade, carbide saw blade can cut wood, organic glass/acrylic, copper, aluminum and other soft materials, in the face of the solid material cutting is "not".