Filter local version does not absorb ore

1. It may be the fault of filtrate pump, the diaphragm of the pump is damaged, the mechanical seal of the pump is invalid, one is leakage, the other is no liquid output or weak output, the pressure is too low, the cleaning effect is not good, the pressure is too high, the filter plate will be damaged and the slurry concentration will be reced. The recoil water pressure is regulated by pump circuit valve and pressure regulating valve. In order to avoid too frequent pressure fluctuation and pressure fluctuation in a short time, there is a buffer cylinder in the backwash water pipeline to stabilize the pressure.

2. This may be the mechanical jam or the belt does not rotate, causing it not to unload ore.

3.

It should be noted that the effect is very poor if the slurry is not sucked suddenly or all the time

If the slurry is not sucked suddenly, the possible reasons are as follows:

1. vacuum system failure, no vacuum or vacuum degree can not meet the requirements. Should check the vacuum pump and vacuum pipeline, distribution head, ceramic plate and other places for failure or leakage

2. whether ore feeding conditions change, such as pulp type, mud content, fineness, concentration, etc

3. when the machine is started up after the combined cleaning, the slurry absorption effect may be good within 0-2 hours, it may decrease slightly within 2-4 hours, and it will get worse and worse after 4 hours, even no slurry absorption. In this case, first check whether the backwashing water pressure (the highest instantaneous water pressure should not be less than 0.08mpa) meets the requirements, shut down the machine in advance for joint cleaning (to ensure normal ultrasound and sufficient nitric acid consumption) and extend the joint cleaning time

4. check the filtrate discharge

   The most likely reason is that you don't know, Juxian doesn't avoid relatives:

   

5. of course, with the aging of machines and ceramic plates, the slurry absorption effect will graally decrease

   you are welcome to communicate more. You can chat with me or see my head picture for other questions about ceramic filter

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in case of poor pulp absorption effect and no pulp absorption, the reasons should be found out in time to solve the problem

4.

In general, the vacuum degree of ceramic filter is about -0.08mpa, which is enough. Sufficient vacuum pressure is only the premise of good slurry absorption effect of ceramic plate. In addition to the influence of vacuum on slurry absorption effect, there are other factors that may affect it:

1. the vacuum display meter fails, and the displayed value is quite different from the actual data

2. ceramic filter plate

   if the ceramic filter plate is blocked or the type selection is inconsistent, the porosity of the new plate is generally about 40%. If the ceramic filter plate has been blocked, the opening rate will become less. When it becomes 30%, the slurry absorption effect may be slightly worse than that of the new plate. When the ceramic filter plate is used for a long time, the opening rate may become 10% or even less. At this time, the slurry absorption effect of the ceramic filter plate will become very poor or even no slurry absorption. At this time, even if the vacuum suction is no longer good, it is necessary to replace the new ceramic filter plate

   how to find the most suitable ceramic filter plate for their own pulp, it is best to try more

3. e to the high mud content and fine particle size of the incoming material, the slurry itself is not suitable for dewatering by ceramic filter. If the ceramic filter is used for dewatering in this case, the blocking of ceramic filter plate will be accelerated. Refer to the description in article 2 for the situation after blocking

4. the filtrate is not discharged smoothly

   if the filtrate can't be discharged smoothly and timely, the new filtrate can't be sucked out. If the filtrate can't be sucked out continuously, no filter cake will be adsorbed on the ceramic plate

5. the spindle speed is too fast

   The rotating speed is too fast to absorb the cake
   There are other possible reasons

5.

Generally speaking, the main reason why the thickness of ceramic filter cake is different is that the old and new degree of ceramic filter plate is different. Because the vacuum suction of ceramic filter, backwash water, nitric acid, etc. are all through the distribution valve, it is often "all win and all lose". When I see your description, I don't know whether the five lines you mentioned mean five discs or five rows of ceramic plates. At that time, there was no pulp suction at all or the effect of pulp suction was poor. I hope my answer is helpful to you:

1. analysis of five discs without pulp suction

   large ceramic filters generally have vacuum tanks at both ends, If 50 M2 ceramic filter is combined with 5 m2 / circle ceramic filter plate (possible), there are 10 discs. The left vacuum tank is responsible for filtering the ceramic plates of the left 5 discs, and the right vacuum tank is responsible for filtering the ceramic plates of the right 5 discs. If the vacuum system of a transformer breaks down temporarily, it may lead to poor slurry suction effect on one side or even no slurry suction and normal operation on the other side

2. there are five rows of ceramic plates across the ceramic filter without slurry absorption

   
   

   the figure above is the schematic diagram of the distribution valve. Coincidentally, the distribution friction ring (right figure) of the distribution valve of the ceramic filter just has a section (the small long section on the right figure) which is the same length as the five continuous small holes of the friction ring, The small and long section is just the stage of filter cake formation in the working process of ceramic filter plate in pulp. If there is a fault in this stage (such as temporary fault in connecting pipeline, distribution system or ceramic filter plate), the filter cake can not be formed at this stage. After turning up, there will be five rows of ceramic plates that do not suck pulp. The specific temporary fault can be determined by oneself

3. in addition, after the normal start-up, the local ceramic filter plate does not absorb slurry or the effect is poor. On the one hand, it is the problem of ceramic filter, on the other hand, it is the problem of ore feeding

   the main problems of ceramic filter are ceramic filter plate and vacuum system. The main problems of ceramic filter plate are the different old and new degree of ceramic plate and the different pore sizes of procts from different manufacturers; The vacuum components and pipes can be checked step by step for vacuum system problems

   The distribution of ore concentration, fineness and pulp concentration in the tank are different

   ceramic filter has multiple systems, so it is easy to have such and such unknown problems. Fortunately, it is good again

4. when the user increases the feeding capacity and wants to improve the processing capacity of ceramic filter, the unknown influencing factors are most likely to appear: for example, after the concentration is increased, the slurry is easy to precipitate and is not easy to stir up, which will accelerate the abrasion, even deformation and fracture of mixing palladium, and even cause the whole worktable to vibrate or even not stir

   above is where I want to go. This is a brick thrown out, hoping to bring back a piece of jade! Focus on many years, welcome more questions ceramic filter

6. Generally, iron powder is filtered by filter, and the moisture content of filter cake is about 10%. Iron powder can be detected by the following reasons:
the reasons that affect the high water content of filter cake are as follows:
first, the external reasons of filter
the change of ore feeding conditions, such as the extremely high concentration of incoming material, the finer particle size, the more mud content, etc< Second, the main shaft speed of the filter is too fast
the vacuum degree of the filter is insufficient
the filter cleaning did not meet the requirements
the life of the filter plate is near and the blockage is serious
the selection of filter plate is inconsistent
the above contents can provide reference for Yantai new Xiangyu.

7.

Ceramic filter is a new and efficient dewatering equipment. If the user finds that the surface of ceramic filter plate sucks pulp poorly or even does not suck pulp, he should check the reasons in time to avoid affecting the proction efficiency. I hope the following analysis and answer will be helpful to you:

I. The reason of ceramic filter itself

the ceramic filter is dehydrated and dried by vacuum suction acting on the ceramic filter plate. The ceramic filter plate needs to be cleaned and has a long service life. If users find that the slurry absorption effect is poor or even not, they should first consider these three aspects:

1. ceramic filter plate

   ceramic filter plate is the most likely two factors, They are rupture and hole plugging: rupture will lead to vacuum distortion and poor cleaning; If it is suspected that the ceramic filter plate is blocked, the cleaning can be strengthened moderately (such as shortening the cleaning cycle, prolonging the cleaning time, increasing the amount of nitric acid, etc.). If the effect is still not improved after strengthening the cleaning, it is necessary to strengthen the cleaning, It should be considered that its service life is approaching, and it should be scrapped in time and replaced with a new ceramic filter plate (when replacing the new plate, it is better to replace the old and new plates or plates from different manufacturers on the same line)

2. vacuum system failure

   the vacuum degree of ceramic filter is generally about -0.085mpa. If the vacuum is abnormal, it can not provide normal vacuum suction, and the slurry suction effect is poor or even not

   in case of abnormal vacuum, we should insist on whether the vacuum pump is faulty, whether the vacuum connecting pipe is leaking, how the friction plate sealing performance of the distribution valve is, whether the rubber pipe connecting the outlet of the ceramic filter plate is aging or falling off, whether the ceramic filter plate is broken, etc

3. cleaning

   the cleaning of ceramic filter is divided into two parts: backwash water cleaning (also useful gas) and combined cleaning. The purpose of cleaning is to discharge the blocked particles out of the ceramic filter plate

   the backwash water can be cleaned directly by visual inspection of the water pressure after filtering of the water filter, which is generally between 0.08-0.12mpa. If it is lower than 0.05Mpa, the flushing effect is poor or even has no flushing effect, resulting in the accumulation of blockage and eventually the scrapping of the ceramic filter plate. The stable backwashing water pressure can be provided by changing the filter element in time and ensuring the pre filtration water pressure

   combined cleaning is to use ultrasonic vibration, nitric acid dissolution and other methods to remove the blockage that can not be removed by backwashing to the maximum extent. Generally, ceramic filtration should be shut down for cleaning for 1 hour every 8 hours of continuous operation. If the old plate is used or the slurry absorption effect is poor, the cleaning can be moderately strengthened (such as shortening the cleaning cycle, extending the cleaning time, increasing the amount of nitric acid, etc.)

4. other reasons

   such as 1,2,3 are normal, but the filtrate can not be discharged normally, the spindle speed is too fast, even the ceramic filter itself manufacturing defects, the user's own modification of the equipment, etc., may lead to abnormal operation of the equipment

   we focus on ceramic filter board for many years, welcome more exchanges

   Second, external reasons

   the change of ore feeding conditions, such as the slime size becoming smaller, the mud content increasing, the concentration becoming thinner, and even improper operation, may lead to the change of ore feeding conditions. If the user finds that the fault cannot be solved by himself, he should contact the manufacturer in time for help

8. I don't know if you mean "material daughter-in-law" means that the concentration of slurry in the tank of ceramic filter is thin, or the slurry absorption cake of ceramic filter plate is thin and the water content is high? If it means that the slurry concentration in the tank of the ceramic filter is thin, it has nothing to do with the ceramic filter itself. We can find a way to increase the slurry concentration before entering the tank of the ceramic filter, so as to improve the dehydration efficiency of the ceramic filter.

9. I hope my analysis will be useful to you
it is well known that the filter medium of ceramic filter is ceramic filter plate. Many micropores with capillary effect are distributed in the ceramic filter plate from the surface to the inside. Its working mechanism is based on the capillary effect of these micropores. When the ceramic filter is used for filtration and dehydration, the filtrate (generally water) is pumped away through these micropores under the action of vacuum suction, and the filter cake is intercepted on the surface of the ceramic filter plate
water glass is a kind of mineral processing agent with adhesion, which may enhance the viscosity of the pulp after use, resulting in the increase of the adsorption resistance of the pulp. When the ceramic filter is used for filtration and dehydration, the vacuum suction of the micropores on the surface of the ceramic filter plate is less than this resistance, which may lead to poor pulp suction effect or even no pulp suction. Some flocculants may cause this phenomenon
of course, it is also possible that the operating parameters of the equipment can not meet the requirements, and the ceramic filter plate has been blocked and nearly scrapped
if there are problems in the use of ceramic filter, please contact the manufacturer in time for help.

10. Also depends on the configuration, different materials and configuration, poor ceramic filter through the ceramic plate on the ceramic microporous suction adsorption concentrate filter water, the parameters set according to one, the fineness of the material, resulting in the loss of water