Q:Why is there a range of electrode powder powder resistivity? The reasons for the high and low are not good.

Read millivolt values and sample height, calculated according to the formula P =UA/IL type resistivity. The resistivity of the conductor is in P, Omega - M; L for voltage measurement distance between two probes for m; A for the conductor cross-sectional area, m2; U, the voltage between two probes for the determination of voltage V; I the strength of the current flowing through the conductors, the resistivity of A. graphite is (8 ~ 13) * 10-6 (/m), high - low note inside magazines. For reference only!

Q:What is the ratio of the coated sand to the graphite powder? How to improve the refractoriness of precoated sand

General additives accounted for 0.1-0.5 of the original sand weight. Different demand, of course, the proportion is not the same, there is no fixed number.

Q:Does the graphite powder cause explosion? If so, how to prevent the production of graphite products in the workshop?

Dust produced in the process of production of some factories and mines, especially the dust produced in the processing of some organic matters, will explode and burn under certain conditions.(2) adequate air and oxidizing agents;(3) there is fire or strong vibration and friction.Such as effective ventilation and biological film, dust suppression technology, integrated dust suppression technology, dust removal measures, smoking and fire operations are prohibited. A pressure relief valve or other device is arranged in the outer shell of the equipment, and an explosion containment system is adopted. For factories with dust explosion hazards, the design must be strictly carried out according to the technical grade of explosion protection, and ventilation and dust removal systems shall be installed separately. Often wet cleaning workshop floor and equipment, to prevent dust flying and gathering. Ensure that the system has a good airtight, if necessary, in airtight containers or pipes in the flammable dust filled with nitrogen, carbon dioxide and other gases, in order to reduce the content of oxygen, dust suppression explosion.

Q:Are sand and particle powders used for casting quartz sand? Detailed and accurate.

Casting molding mainly used for special silica sand, zircon sand, magnesia and chromite, pearl sand, graphite sand. Casting powder mainly used in coatings, such as: quartz powder, bauxite powder, zircon powder, graphite powder, etc.

Q:The axis and drum can use graphite powder lubrication

This doesn't seem good. Graphite powder is a solid lubricant. It is suitable for heavy equipment lubrication. The axis and drum or low viscosity lubricating grease is better, so fast.

Q:How much is the price of graphite powder for a ton?

Battery with graphite powder to Qingdao Chenyang graphite Co., the quality is reliable, trustworthy

Q:Sunshine door lock winter treatment

Check the locking gap between the lock body and the locking plate regularly, whether the lock tongue is matched with the height of the locking plate hole or not, the optimum clearance between the door and the door frame is 1.5mm-2.5mm. In case of any change, the position of the door hinge or the lock buckle shall be adjusted. At the same time pay attention to the weather (spring wet, dry in winter) caused by cold contraction, thermal expansion, to ensure that the door and door frame, locking body and the locking plate gap reasonable coordination, in order to ensure the smooth use of locks. When you buy, you can ask the manufacturer directly.

Q:How can the antirust graphite powder used for locks be operated? Where is it painted?

Check the locking gap between the lock body and the locking plate regularly, whether the lock tongue is matched with the height of the locking plate hole or not, the optimum clearance between the door and the door frame is 1.5mm-2.5mm. In case of any change, the position of the door hinge or the lock buckle shall be adjusted.

Q:Thermal conductivity and density of graphite powder

In the formula, P is porosity, and lambda 0 is the thermal conductivity without hole (P=0). This formula is of historic significance. For graphite, the pores are not spherical or more unequal, but of course they do not apply. But it shows that the larger the porosity (the smaller the density), the smaller the thermal conductivity. This qualitative conclusion is correct.

Q:What binder does the graphite powder form with?

The commonly used asphalt in the industry is used as binder, and graphite powder and asphalt are mixed and pressed to form. It is also necessary to heat, roast and graphitized the asphalt in the graphite blocks to obtain certain heat conducting, conductive or other uses of Shi Mobang.