What's the matter with the thickness of the filter's absor

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.

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

3. The activity index, fluidity ratio and fineness still depend on whether the mixing station has high requirements for the auxiliary material of mineral powder

detailed rules for the implementation of mineral powder detection

2011-12-07 20:51:20 | classification: default classification | font subscription
I. scope of application & lt; xmlnamespace prefix =" o" ns =" urn:schemas-microsoft-com : office:office" /& gt;
the detailed rules are applicable to the determination of density, specific surface area (Brinell method), magnesium oxide, loss on ignition, sulfur trioxide, fluidity ratio and activity index of granulated blast furnace slag powder< 2. Technical standards
1. Methods for determination of density of cement (GB / T 208-94)
2. Methods for chemical analysis of cement (GB / T 176-1996)
3. Method for determination of specific surface area of cement (Brinell method) (GB 8074-87)
4. Granulated blast furnace slag powder for cement and concrete (GB / T 18046-2000)
3 The number of each test item is as follows:
name of test item
density
specific surface area
magnesium oxide
loss on ignition
sulfur trioxide
fluidity ratio
activity index
number
1
2
3
4
5
6
7
2<
instruments and equipment used for testing
specifications
requirements for instruments and equipment
1
Li's bottle

1
balance
maximum weighing 100g, graation value ≤ 0.05g
2
air permeability meter
/
2
analytical balance
graation value 1mg
2
stopwatch
precision 0.5s
2
oven
/
2,4 5
dryer
/
3,4,5
analytical balance
division value 0.1mg
3
magnetic stirrer
/
3
atomic absorption spectrometer
/
4,5
muffle furnace
temperature can be controlled at about 1000 ℃
5
beaker
300ml
6
vernier caliper
/
6
cement mortar fluidity tester
/
6 7
balance
weighing 1200g, sensitivity 0.1g
6 7
cement mortar mixer
JC / T681
7
mold test
JC / t726
7
tamping table
JC / t682
7
flexural strength testing machine
JC / t724
7
compressive strength testing machine
precision 1%
7
compression fixture
JC / t683
7
curing box
/
7
curing pool
/
IV. testing items Technical requirements:
item
grade
S105
S95
S75
density, g / cm3 not less than
2.8
specific surface area, M / kg not less than
350
activity index, and% not less than
7d
95
75
55
28d
105
95
75
fluidity ratio, %No less than
85
90
95
sulfur trioxide,%, no more than
4.0
loss on ignition,%, no more than
3.0
magnesium oxide,%, no more than
14
v. inspection before testing
1. Before testing, check whether the room temperature humidity of soft training meets the specification requirements, If it does not meet the requirements, start the equipment to meet the requirements before testing
2. Check whether the circuit connection of instruments and equipment is correct, and whether there is circuit damage and leakage
3. Turn on the power supply and run the instruments and equipment without load to determine whether they are running normally
4. Check whether the test water is clear and transparent, and whether it meets the test requirements< 6. Test steps and data processing
1. Density
(1). After injecting anhydrous kerosene into Li's bottle to 0-1ml scale mark (subject to the lower part of meniscus), cover the bottle stopper and put it into a constant temperature water bath, so that the scale part is immersed in water (the water temperature should be controlled at the temperature of Li's bottle scale), keep the constant temperature for 30min, and record the initial (first) reading
(2) take out the Li's bottle from the constant temperature water tank, and use filter paper to carefully wipe the part without kerosene in the slender neck of Li's bottle
(3) the sample should pass through the 0.90mm square hole sieve in advance and pass through the 110 mm square hole sieve in advance ± Dry at 5 ℃ for 1 h and cool in a dryer to room temperature. Weigh 60g of ore powder to 0.01g
(4) put the sample into the Li's bottle of (1) with a small spoon, shake it repeatedly (or use ultrasonic vibration) until no bubbles are discharged, then put the Li's bottle in a constant temperature water bath again, keep it at constant temperature for 30min, and record the second reading< The temperature difference between the first reading and the second reading is not more than 0.2 ℃< Results calculation
① the volume of mineral powder should be the second reading minus the initial (first) reading, that is, the volume of anhydrous kerosene discharged by mineral powder (ML).
② the density of mineral powder ρ( G / cm3) calculated by the following formula:
mineral powder density ρ= The results are calculated to the third decimal place, and the whole number is taken to 0.01g/cm3. The test results are taken as the arithmetic mean of the two determination results, and the difference between the two determination results shall not exceed 0.02 g / cm3
2. Specific surface area
(1) air leakage inspection
plug the upper opening of the air cylinder with a rubber stopper and connect it to the pressure gauge. Use the air extraction device to extract part of the gas from the pressure gauge arm, and then close the valve to observe whether there is air leakage. In case of air leakage, seal with piston grease< (2) determination of the volume of the test layer (1) mercury displacement method: put two pieces of filter paper into the cylinder along the cylinder wall and press down with a slender rod whose diameter is slightly smaller than that of the permeable cylinder until the filter paper is flat and placed on the perforated metal plate. Then fill it with mercury, and use a thin glass plate to gently press the mercury surface to make the mercury surface flush with the cylinder opening, and ensure that there are no bubbles or cavities between the glass plate and the mercury surface. Pour the Mercury out of the cylinder and weigh it to the accuracy of 0.05g. Repeat the determination several times until the value is basically unchanged. Then, take out a piece of filter paper from the cylinder, and use about 3.3g cement to compact the ore powder layer. Then inject mercury into the upper space of the cylinder, remove bubbles, flatten, pour out mercury and weigh it in the same way as above, and repeat several times until the difference of mercury weighing value is less than 50mg
note: solid ore powder layer should be prepared. If it is too loose or the ore powder can not be pressed to the required volume, the trial amount of ore powder should be adjusted
2. The volume of sample layer V in the cylinder is calculated according to the following formula. Accurate to 0.005cm3
V = (P1-P2)/ ρ Mercury
V --- volume of sample layer, cm3
P1 --- the mass of mercury filled in the cylinder without ore powder, G
P2 --- the mass of mercury in the cylinder filled with ore powder, G< br /> ρ Mercury ---- the density of mercury at the test temperature, g / cm3
③. The volume of sample layer should be measured at least twice. Each time, it shall be compacted separately, and the average value of the difference between the two values shall not exceed 0.005cm3, and the temperature near the cylinder ring the measurement shall be recorded. The volume of sample layer should be corrected every quarter to half a year< (3) test steps:
① ± The standard sample dried at 5 ℃ and cooled to room temperature in the dryer is poured into a 100ml closed bottle and shaken for 2min. The agglomerated sample is crushed to make the sample loose. After standing for 2min, open the bottle cap and gently stir to make the fine powder falling on the surface ring the loosening process distribute into the whole sample
2. The sample of ore powder should pass through 0.9mm square hole sieve first, and then pass through 110mm square hole sieve ± Dry at 5 ℃ and cool in a desiccator to room temperature
3. The amount of standard sample for calibration test and the quality of mineral powder to be determined should reach the porosity of 0.500 in the prepared sample layer ± 005, the formula is
W= ρ V ( 1 - ε)
W --- amount of sample required, G< br /> ρ---- Sample density, g / cm3
V --- measured volume of sample layer, cm3< br /> ε---- The porosity of the sample layer
4. Put the perforated plate on the flange of the air permeable cylinder, use a small diameter rod to send a piece of filter paper to the perforated plate, and press the edge. Weigh the amount of mineral powder determined in the previous section, accurate to 0.001g, and pour it into the cylinder. Tap the edge of the cylinder gently to make the surface of the powder layer flat. Then put in a piece of filter paper, and tamp the sample evenly with a vibrator until the support ring of the vibrator tightly contacts the top edge of the cylinder and rotates for two circles, and then slowly take out the vibrator
⑤. Connect the gas permeable cylinder with the test layer to the pressure gauge to ensure that it is tightly connected without air leakage and vibration of the prepared test layer
6. Turn on the micro electromagnetic pump and slowly draw air from the pressure gauge arm until the liquid level in the pressure gauge rises to the lower end of the expansion part and close the valve. When the meniscus of the liquid in the manometer drops to the first scale line, the timer starts. When the meniscus of the liquid drops to the second scale line, the timer stops. Record the time required for the liquid level from the first scale line to the second scale line. Record in seconds and record the temperature (℃) ring the test< Calculation
(4)
①. When the density and porosity of the tested material are the same as those of the standard sample, and the temperature difference ring the test is ≤ 3 ℃, the calculation is as follows:
s = SS T1 / 2 / TS1 / 2
if the temperature difference ring the test is greater than 3 ℃ ± At 3 ℃, it is calculated as follows:
s = SS T1 / 2 η s1/2 / [ Ts1/2 η 1 / 2]
s -- specific surface area of the tested sample, cm2 / g
SS -- specific surface area of standard sample; Cm2 / G:
T -- the time of the liquid level falling in the manometer, s
TS -- the time measured by the liquid level drop in the pressure gauge ring the standard sample test, s< br /> η—— The air viscosity of the tested sample at the test temperature, Pa.s< br /> η S -- air viscosity of standard sample at test temperature, Pa.s
2. When the void ratio in the test layer of the tested sample is different from that in the standard sample layer, and the temperature difference ring the test is ≤ 3 ℃, it is calculated as follows:
s = [SS T1 / 2 (1- ε s) ( ε 3)1/2] / [Ts1/2 (1- ε) ( ε S3) 1 / 2]
if the temperature difference is greater than ± At 3 ℃, it is calculated as follows:
s = [SS T1 / 2 (1- ε s) ( ε 3)1/2 η s1/2] / [Ts1/2 (1- ε) ( ε s3)1/2 η 1/2]
ε---- The porosity in the test layer of the tested sample< br /> ε When the density and porosity of the tested sample are different from those of the standard sample, and the temperature difference ring the test is ≤ 3 ℃, the calculation is as follows:
s = [SS T1 / 2 (1- ε s) ( ε 3)1/2 ρ s]/ [Ts1/2 (1- ε) ( ε s3)1/2 ρ]
if the temperature difference is greater than ± At 3 ℃, it is calculated as follows:
s = [SS T1 / 2 (1- ε s) ( ε 3)1/2 ρ s η s1/2] / [Ts1/2 (1- ε) ( ε s3)1/2 ρη 1/2]
ρ---- Density of tested sample, g / cm3< br /> ρ S --- density of standard sample, g / cm3.
4. The specific surface area of ore powder should be determined by the average value of secondary air permeability test results. If the difference between the results of the second test is more than 2%, the test shall be repeated. The calculation shall be accurate to 10cm2 / g, and values below 10cm2 / g shall be rounded< (5) when the specific surface area calculated in the unit of 10cm2 / G is converted to m2 / kg, it needs to be multiplied by a factor of 0.1< 3. Magnesium oxide
1) hydrofluoric acid perchloric acid decomposition
weigh about 0.1g sample M1, accurate to 0.000lg, put it in a platinum crucible (or platinum dish), wet it with 0.5 ~ 1ml water, add 5 ~ 7ml hydrofluoric acid and 0.5ml perchloric acid, and evaporate it on an electric heating plate. Shake the platinum crucible to prevent splashing when it is nearly dry, and cool it down after the white smoke is exhausted. Add 20ml hydrochloric acid (1 + 1), warm the solution to orange white, remove and cool. Transfer to 250 ml volumetric flask. Add 5 ml strontium chloride solution, dilute with water to the mark, and shake well. This solution B was used as raw material

4. town

5.

Sup means & quot; What's the matter& quot;， Sometimes it is also used as meeting language, or words with interrogative meaning like yes. Its

Real & quot; What's the matter& quot; What is the standard language of English; In American English, people often omit a paragraph and leave half a syllable. what' After s up,

sup graally became his pronoun. In network communication, sup can also be understood as super, which means support and admiration

mathematical symbol:

mathematically, sup {} is used to denote & quot; Supremum & quot;, That is the minimum upper bound. It is the abbreviation of "supreme"

abbreviation of supplement

n. supplement, supplement

vt; Sup3 denotes x ^ 3 (the cube of x)

sup

English [S & # 652; p] Beauty [S & 652; p]

vt; Drink with a spoon; SIP (soup, tea, etc.)& lt; Beauty, mouth & gt; Drink (wine)

VI. & lt; Ancient & gt; Have dinner

n. take a SIP (drink)

third person singular present tense: sups

present participle: supping, past participle: supped

usage examples:

1, we supped on cold toast beef.

we had cold roast beef for dinner.

2 They sat supping their beer.

they sat sipping their beer.

3. Come on, sup up your tea.

let's have tea.

4. They suped on bread and cheese.

they had bread and cheese for dinner

< H2 > extended data:

similar phrases

Sup on v. having dinner

bite and sup food and drink, A little food

similar words

sup pref (used before the letter P) = sub -

sup = sailors union of the Pacific Seamen's Union [US]

sup v. [t] 1, a bite; A small amount of (+ of) v. [i] 1. Dinner

(+ on / up / off) v. [t]

sup. (1) super fine. (2) superior. (3) supplement. (4) supply. (5) [Latin]

supra = above.

sup.ct, =Supreme Court)

sup.ct; Supreme Court

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