Magnesium Powder

Using the high technology,the company is engaged in production of highly purified spherical metal magnesium powder,which has the granularity of 2 mm-0.0035 mm(10-400 meshes),magnesium content of over 99.5% and loose thickness of 0.1-0.75 g/cm3.The product exceeds GB5149.1-2004 of China and has the active magnesium of over 98.5%,and foreign matters of Zn<0.1%,Fe<0.2%,Ca<0.15%,Mn<0.1%,C1<0.03%,H2O<0.05%,The other foreign matter is <0.5%,and hydrochloric acid insolubles is <0.2%.The company turns out magnesium powder in spherical shape instead of traditional rhombus shape,which is rarely seen in the world and used much better than those in rhombus shape.

The characteristics of magnesium powder is:It is flammable and explosive,and brings high temperature and glaring light when burning. Therefore,magnesium powder is widely used in such scientific areas as aviation industry.The chemical performance of magnesium is very active,which is mostly used in metallurgical industry.Magnesium powder can serve as desulfurizer or cleaning agent for steel-making industry and casting of non-ferrous metals,and reducer for production of rare metal.In chemical industry,magnesium powder can be used as dehydrant for organic compound or to directly make organic compound of magnesium.In recent years,magnesium powder has been mostly used in spaying,coating,anti-corrosion,monocrystalline silicon,polycrystalline silicon,and casting of metallurgical powder as well.

Passivation Spherical Magnesium Powder

Passivation spherical magnesium powder is used for desulfuration and deoxidation in production of the steel,bringing the sulfur element of fine steel to be less than 0.004%.As a dehydrant ,it is not replaceable to improve fine steel quality,exploitation. In production of ductile cast iron, it can be a nodulizer in place of middle alloy among iron-silicon-magnesium.For oil it can resume or accelerate the speed of the pressure drilling hole and oil well. Passivation spherical magnesium powder is an effective dehydrant and incendiary agent for chemical .Besides used as a magnesium alloy powder ,it is also a kind of metallurgical materials.

Chemical components:magnesium content is bigger than 99.5% before passivation ,and the magnesium content is about 75-94% after passivation.

Product Specification:10-80meshes (granule 2-0.18mm)<detailed mixing production is accoeding to requirements of clients>

Production Shape:roundness or unequal roundness

Product Color:dark grey or silver white

Loose Density:0.75-0.95g/cm3

Average Burning Point:560-600°C

Fire Retardant Time:1000-1100°C not shorter than 15 seconds.

(physical and chemical property ,technique standards,usage and attention)

As the desulfuration agent for smelting steel and iron ,passivation spherical magnesium powder has been widely used in developed countries.It is necessary for steel and iron enterprises to produce qualified and special type steel.The advantages of desulfuration are:less consumption,short time processing,fast reaction,little dropping of molten iron temperature,little sinter,good effect of desulfuration and deep desulfuration.In order to make better mastery and application of the technique of passivation spherical magnesium powder ,here let's see the physical chemical property,technique standard,usage and attention that are related to passivation spherical magnesium.

1.Specifications

2-0.21mm(10-65meshes),0.85-0.18mm(20-80meshes),0.99-0.21mm(16-65meshes),0.85-0.21mm(20-65meshes),0.85-0.30mm(20-50meshes),detailed mixing proportion is according to requirements of clients.

Generally the granularity standard is as below:

Granule Dia.(mm)
2-0.85
0.85-0.50
0.50-0.40
0.40-0.21
<0.21
Granularity Proportion (%)
10-25
40-55
15-25
5-10
0-5

 

2.Physical and Chemical Property and Technique Standard

  • The passivation magnesium powder looks grey and white ,and the granule shape is roundness or unequal roundness.
  • The burning point of passivation magnesium powder is between 560-600°C.
  • The fire retardant time of passivation magnesium powder is not shorter than 15 seconds at 1000°C.
  • The passivation magnesium powder should not contain impurity and agglomeration ,but there can be a little passivation layer powder.
  • Detailed chemical components and related guide line are as below:
Chemical Components(%)
Loose Density(g/cm3)
Before Passivation(Mg)
After Passivation(Mg)
H2O
>=99.95
75-95
<0.3
>0.75

 

Burning Point
560°C-600°C
Fire Retardant Time(S)
>=15

3.Checking Rules

  • Using eyes to see the color,shape and other appearance of the passivation magnesium powder.
  • Content of granularity ,loose density ,Mg, CaO,CaF2,MgO,P,S,and H2O,is checked accordind to set standard.
  • The burning point and fire retardant time are checked according to special requirement and method.
  • Sampling of passivation magnesium powder is according to batches(each batch is 2.0tons),and there can also be spot-check to contentious product.

4.Usage and Effect

*During production and testing period ,spraying and blowing equipment processing of magnesium based desulfuration agent must be provided with.

*Mg based desulfuration agent is generally mixed used with CaO based desulfuration agent,the mixing proportion is:10-25%,90-75%,a small quantity of carbide powder can also be mixed.

*Input of Mg based desulfuration agent is between :0.6-1.0KG/T rion.

Input of CaO based desulfuration agent is between:2.0-3.5KG/T rion.

*Pay attention to sampling and measuring temperature before and after spraying and blowing. Take slag-off in time when spraying and blowing are completed.

*The best temperature of magnesium based desulfuration agent is around 1280± 30°C.

*After blowing in Mg based desulfuration agent ,temperature of molten iron will drop 10-20°C.

*Spraying and Blowing Speed:the spraying and blowing speed of mixed spraying and blowing method is from 40-60KG/min.

Joined spraying and blowing method:the spraying and blowing speed of Mg based desulfuration agent is from 10-20KG/min

The spraying and blowing speed of CaO based desulfuration agent is from 25-35KG/min.

*Spraying and Blowing Method:

Mixed spraying and blowing method:insert blowing tube 2/3 deep into the molten iron to spray the mixed materials of Mg based desulfuration agent and CaO based desulfuration agent.

Joined Spraying and Blowing Method:blowing in CaO based desulfuration agent first,then blowing in Mg based desulfuration agent.

*desulfuration efficiency:can reach 80-90%,and the desulfuration depth can reach 0.001%.

5.Package ,Transportation and storage

*Use bags,metal pail or paper pail to pack ,the underlayer are plastic bag. The package specifications are 25Kg,100Kg,500Kg,1000Kg/bag,and the package can also be according to the requirements from clients.

*Use trucks and containers to transport ,and make static protection to the trucks,no fire is allowed to approach the trucks.

*For storage,the goods should be placed in oder according to production time and specifications:the storehouse should be ventilated,dry,fire preventing,wet preventing,static preventing and the hermetic goods can be stored for 6 months.

6.Others

*The products should be clearly indicated with quality certificate,names of parties,product name,specifications,weight ,chemical components,delivery and receiving responsible persons names.

*If there is any splashing powder of the product ,then clear it up.

*Prepare fireproof sand at the storehouse and operation spot,do not use water and fire extinguisher to put off fire.

*For other items ,which are not covered here,some appropriate measures will be taken according to operation procedure.

APPLICATIONS

 The products is used for  refractories .

PACKING

 in 25kg /bag then 40bags  into 1mt big bag or 880bags into container

STORAGE  AND SHELF LIFE

  At least 18 months in dry conditions

AVAILABILITY

 100-1000 metric tons per month

SHIPMENT

 60 days after L/C date