High silica fiberglass casting filter

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High silica fiberglass casting filter

high silica mesh casting filter can effectively remove slag,refractory particles and non-metallic inclusions from molten metals.It is developed as a low cost but with rather filtration efficiency
alternative to ceramic filters.Made from specially treated silica yarns,silica mesh filters are capable of
withstanding pouring temperatures up to 1620 Degree C.Silica mesh filters are ideal for in-mold filtration of gray, malleable,white,compacted graphite and ductile cast irons, as well as non-ferrous
aluminum and copper-based metal alloys and many types of small scale steel casting filtration.

ADVANTAGES:

• Low cost and easy to use

• Improves fluidity and metal distribution

• Removes micron sized inclusions and impurities

• Can be used with existing pattern equipment

• Eliminates inclusions created by ceramic chips

APPLICATIONS:

• Cut pieces for in mold filtration like sand casting,gravity casting,etc.

• Cut pieces for riser sleeves,bottom or across ports in walls

• Cut pieces to provide a weakened plane for riser knock-off

• Cup shapes for investment casting

SPECIFICATION:

Model No.	SiO2%	Thickness	Mesh size	Max.Temp.	Open area	Max.work time
HSFG-15	≥96	0.35mm	1.5x1.5mm	1450℃	55%	10minutes
HSFG-20	≥96	0.35mm	2.0x2.0mm	1450℃	60%	10minutes
HSFG-25	≥96	0.35mm	2.5x2.5mm	1450℃	70%	10minutes
HSFG-S15	≥96	0.98mm	1.5x1.5mm	1620℃	22%	15seconds
HSFG-S20	≥96	0.98mm	2.0x2.0mm	1620℃	26%	15seconds
HSFG-S25	≥96	0.98mm	2.5x2.5mm	1620℃	32%	15seconds

FILTERING TIPS:

• Copper alloys&leaded bronze:1.5x1.5mm mesh

• Gray Iron:1.5x1.5mm mesh

• Ductile Iron:2.0x2.0mm &2.5x2.5mm mesh

• Small scale steel:1.5x1.5mm mesh

PLACEMENT POSITION:

*Cut pieces can be rectangular or round,size from 20mm to 900mm.

*Preformed cup filter OD can be 100/110/115/120mm or as per request.

Q:What is the reason that the whole ceramic filter does not attract ore?: After the joint cleaning, 0~2 hours of suction effect may be good, 2~4 may drop slightly, 4 hours later will become worse and worse, or even suck. This case should first check the backwash water pressure (instantaneous maximum pressure should not be less than 0.08MPa) is to meet the requirements, should also advance down (to ensure normal and ultrasonic cleaning combined with nitric acid dosage sufficient) and prolong the cleaning time.

Q:Ceramic filter fineness thin mud suction is not what to do more: With ceramic filter to treat pulp dehydration, the particle size is too large, the particles are easy to precipitate, the particle size is too small, too much mud, then the water content of the filter cake will increase, and the life of the ceramic filter plate will be reduced.

Q:The ceramic filter plate is broken. What will happen to the vacuum pump?: At this time, take the filtrate (this is not the first water slurry) will pollute the ceramic filter pipe, friction ring, filtrate pump, may damage the vacuum system, remaining in the pipeline in the pulp will recoil pressure under the action of pollution caused by the other ceramic plates, ceramic plates blocked him. Once the ceramic plate is broken (depending on the severity), it will make the vacuum distortion, resulting in ceramic filter suction effect worse or even no suction!

Q:Ceramic filter cleaning, sulfuric acid cleaning: Can be washed with chromic acid lotion. The effect is better

Q:How much is the accuracy of 50nm ceramic membrane filtration?: 50nm refers to the nominal pore size, but it does not mean that the holes in the ceramic membrane are 50nm, but the approximate number of holes. The size of the pores may be between 40~60 and 45 to 55nm. Generally introduced, annotated range, you can also own to detect.

Q:What is the reason that ceramic filter does not absorb mineral powder?: One is leakage, two is no liquid output or output weakness, pressure is too low, cleaning effect is not good, the pressure is too large, will cause damage to the filter plate and reduce the slurry concentration. The recoil pressure is regulated by the pump loop valve and the pressure regulating valve.

Q:What is the working pressure of the ceramic filter?: Vacuum pressure or suction is the vacuum of the equipment, the size of the vacuum directly affects the effect of ceramic filter board suction (yield and water content). The vacuum system of ceramic filter consists of vacuum pumps, tanks, distribution device, ceramic filter plate and a connecting pipe is composed of ceramic filter, the vacuum pump is generally 2BV series water circulation pump, the vacuum pump vacuum limit is -0.097MPa, using a vacuum pump for a long time or vacuum system has poor sealing performance may cause a certain degree of vacuum distortion, so the ceramic filter vacuum is generally difficult to achieve in the -0.097MPa, -0.08 ~ 0.097MPa, which indicates that the vacuum degree is good, such as the vacuum degree is not up to -0.07MPa or less, the vacuum system may be an exception.

Q:The vacuum degree of the ceramic filter is normal and the cake water is large: The concentration, particle size and mud content of the raw materials are not suitable for or due to changes, which are no longer suitable for dehydration using ceramic filters

Q:Microporous ceramic filter plate cleaning: For the use of a long time, the method 1, the effect is still no significant improvement, that is how to plug the ceramic filter plate regeneration? The ceramic filter plate with uneven or non sucking slurry can be removed, and oxalic acid or other acid liquid with certain concentration and certain temperature can be taken together to dredge the microporous of the ceramic filter plate. (do not recommend sulphuric acid)

Q:The working principle of ceramic filter: The working principle and mechanism and the shape of ceramic filter disk vacuum filter is similar to that in the pressure under the action of suspension by filtration medium, particles are trapped cake is formed at the surface of the medium, and the liquid through a filter medium outflow, reached the purpose of solid-liquid separation. The difference is that the filter medium of ceramic filter plate with microporous capillary effect, the capillary force in the pores is larger than the vacuum force applied to microporous keep full liquid state, no matter under what circumstances, the ceramic filter plate does not allow air through, because there is no air through solid-liquid separation, low energy consumption, vacuum a high degree of.

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