CN109580467A - A kind of test equipment and test method of resistant material corrosion life - Google Patents
A kind of test equipment and test method of resistant material corrosion life Download PDFInfo
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- CN109580467A CN109580467A CN201811542890.3A CN201811542890A CN109580467A CN 109580467 A CN109580467 A CN 109580467A CN 201811542890 A CN201811542890 A CN 201811542890A CN 109580467 A CN109580467 A CN 109580467A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
Abstract
The present invention relates to the test equipments and test method of a kind of resistant material corrosion life, the test equipment includes cup body, sealed cup cover component, mixing component and temperature conditioning unit, wherein, the cup body includes outer cup and the interior cup body for being set in the outer cup and being formed between outer cup annular space；The sealed cup cover component includes cup lid compatible with the outer cup and ceramic insulation gasket, and sealing diaphragm and diaphragm retaining ring；The mixing component includes the agitating shaft of motor, stirring parts and the connection motor and stirring parts, and the agitating shaft, which passes through the cup lid, sealing diaphragm and the extension of diaphragm retaining ring, is located at the stirring parts in the inner cup body；The temperature conditioning unit includes the thermocouple and heating wire of coupling setting；Present device whole design is simple, can effectively prevent that acid gas is excessive, heat-insulation and heat-preservation, and the present invention can be effectively used for the corrosion rate of equipment and materials and the assessment of service life.
Description
Technical field
The present invention relates to material high temperature corrosion fields of measurement, in particular to one kind equipment in a step acid extracting is adopted
The test equipment and method of resistant material corrosion life.
Background technique
Zhun Neng resource synthetic development Co., Ltd, Shenhua makes full use of Zhungeer coal field " high alumina, rich gallium " advantage, at home
It takes the lead in successfully having developed circulating fluid bed coal ash " a step acid extracting " Extraction metallurgy grade aluminum oxide technology, the project is to slow
The shortage of solution bauxite resource ensures that aluminum i ndustry resource security is of great significance.
In the process flow of " a step acid extracting ", related chemical industry equipment is (as dissolution tank, process pipe, evaporator, acid are inhaled
Receive tower and subsider etc.) working condition it is more harsh: operating temperature is higher (between 120~180 DEG C)；The slurry of dissolution is non-
Oxidisability strong acid-hydrochloric acid condition, and along with a large amount of solid granulates, under the action of mechanical force, have to the material of equipment
Certain erosive wear effect, so the equipment selection with slurry solution contact portion, is mostly that resistance to high temperature corrosion ability is strong
Inorganic non-metallic material, such as polytetrafluoroethylene (PTFE), silicon carbide, glass reinforced plastic and graphite, the corrosion rate of such material can not lead to
The electrochemical means for crossing conventional measurement metal electron gain and loss are assessed, simultaneously because the working condition of test is more harsh,
General high-temperature high-pressure reaction kettle can not also carry out whole simulation test according to actual condition, so as to cause such chemical industry equipment
Use corrosion life can not accurately be assessed.Due in the whole process flow, the tolerance and chemical industry equipment of material
The feasibility for being related to entire process flow using corrosion life, so meaning ten of the corrosion lifetime evaluation to a step acid extracting
Divide important.
Summary of the invention
The object of the present invention is to provide the test equipment and test method of a kind of resistant material corrosion life, for for
The use corrosion life of equipment and materials is assessed in one step acid extracting.
One aspect for achieving the above object, the invention adopts the following technical scheme:
A kind of test equipment of resistant material corrosion life, wherein the test equipment includes cup body, sealed cup cover group
Part, mixing component and temperature conditioning unit, wherein
The cup body includes outer cup and the interior cup body for being set in the outer cup and being formed between outer cup annular space；
The sealed cup cover component includes cup lid compatible with the outer cup and ceramic insulation gasket, and sealing every
Film and diaphragm retaining ring, the ceramic insulation gasket is in a ring and its lower end surface is equipped with convex annular compatible with the annular space
It rises, the ceramic gasket is arranged between the cup lid and outer cup, for sealing the outer cup with cup lid cooperation；Institute
The lower end for stating cup lid is equipped with circular protrusions, and the side wall of the circular protrusions and the upper end of wall in the inner cup body are equipped with matching
Screw thread, the sealing diaphragm and diaphragm retaining ring are from top to bottom successively fitted in the lower surface of the circular protrusions of the cup lid, are used for
Protect the lower surface of the circular protrusions；
The mixing component includes the agitating shaft of motor, stirring parts and the connection motor and stirring parts, the agitating shaft
It is located at the stirring parts in the inner cup body across the cup lid, sealing diaphragm and the extension of diaphragm retaining ring；
The temperature conditioning unit includes the thermocouple and heating wire of coupling setting, and the thermocouple passes through the cup lid and protrudes into institute
Interior cup body is stated to monitor inner cup body temperature, to heat object in inner cup body on the outer wall of the heating wire winding to the interior cup body
Material.
Test equipment according to the present invention, it is preferable that the stirring parts include stirring slurry and lantern ring, the stirring slurry processing
At block form agitating paddle, the inside of the box of the block form agitating paddle is equipped with groove, for sample to be tested to be embedded in box
It is interior；The lantern ring is set in outside the box, for the sample to be tested of insertion to be fixed to the block form agitating paddle.
Test equipment according to the present invention, it is preferable that the stirring shaft material is titanium alloy material, more preferable TC10；Institute
Stating stirring pulp material is polytetrafluoroethylene (PTFE), and the lantern ring is Hastelloy B.
Test equipment according to the present invention, it is preferable that spiral groove, the electric heating are machined on the outer wall of the interior cup body
Silk is along the outer wall that the spiral groove is wound to the interior cup body.In the present invention, thermocouple and electricity in the temperature conditioning unit
The coupling setting of heated filament refers to that the heating power of the heating wire can carry out feedback condition according to the monitoring temperature of thermocouple, with
By inner cup intracorporal temperature control in the range of needs, being specifically configured to it is known in the art that no longer superfluous here between the two
It states.
Test equipment according to the present invention, it is preferable that the interior cup body is corundum ceramic cup body, and inner wall is coated with asphalt mixtures modified by epoxy resin
Rouge coating；
The outer cup includes silicon carbide internal layer, stainless steel outer layer, and for cohere the silicon carbide internal layer with it is stainless
The intermediate adhesive layer of steel outer layer；Preferably, the adhesive layer is silicon rubber.
Test equipment according to the present invention, it is preferable that the cup lid is process by stainless steel material, preferably
1Cr18Ni9Ti material；The motor is miniature rotating electric machine, is fixed on the cup lid.
Test equipment according to the present invention, it is preferable that between the cup lid, sealing diaphragm and diaphragm retaining ring and described
Between cup lid and ceramic insulation gasket, it is bonded together by epoxy resin；Preferably, the ceramic insulation gasket is by aoxidizing
Aluminium Ceramic manufacturing is made, and wherein alumina content is not less than 96wt%, and the sealing diaphragm and diaphragm collar material are respectively chlorine
Buna and polytetrafluoroethylene material.
Test equipment according to the present invention, it is preferable that the cup lid, sealing diaphragm and heat insulating mattress and agitating shaft it
Between be packed into Ring-cylindrical graphite-pipe in the annular gap that is formed；Preferably, graphite-pipe outer wall coating epoxide resin material with
The sealing diaphragm, heat insulating mattress form self-lubricating seal structure.The ceramic insulation gasket, sealing diaphragm, diaphragm retaining ring and
Being equipped with for graphite-pipe can effectively play the sealing function for hindering acid volatilization gas excessive.
Another aspect for achieving the above object, the invention adopts the following technical scheme:
The test method of the resistant material corrosion life of equipment therefor in one step acid extracting, wherein utilize above-mentioned test
Sample is fixed to the stirring and tested upper in acid condition by equipment；Pass through the quality of sample before and after measurement sample
Variation, to calculate the corrosion rate under the operating condition of sample, and then obtains the corrosion life of resistant material；Wherein,
The corrosion rate is calculated according to formula (1):
Wherein: v-corrosion rate, unit mm/h；W0-starting weight, unit g；
W1-end weight, unit g；ρ-density, unit g/cm3；
S-surface area, unit mm2；H-test period, unit are hour.
The corrosion life is calculated according to formula (2)
F=D/v (2)
Wherein: f-corrosion life；The corrosion allowance that D-material allows
The technique that flyash " a step acid extracting " extracts aluminium oxide may refer to patent document CN102145905A, pass through
The mode of reference is incorporated into the application.Specifically, the preparation method of the white clay may comprise steps of:
1) magnetically separating and removing ion from fly ash: flyash through crush reach 100 mesh hereinafter, plus water be made into solid content be 20-40wt%
Slurry, carry out magnetic separation, ten thousand GS of magnetic separation field strength 1.0-2.0 on vertical ring magnetic separator；Slurry after magnetic separation is after being separated by solid-liquid separation
Obtain the filter cake that solid content is 25-50wt%；
2) acid it is molten: by the filter cake after magnetic separation be placed in acid-resistant reacting kettle carry out hydrochloric acid acid it is molten, concentration of hydrochloric acid 20-
30wt%, the molar ratio of aluminium oxide is 4.5:1-9:1 in HCl and flyash in hydrochloric acid, and leaching temperature is 120 DEG C -150 DEG C；Acid
Product is separated by solid-liquid separation, is dried after molten, obtains white clay.
Method in accordance with the invention it is preferred that when test the slurry for flooding the stirring parts is housed in the inner cup body,
The slurry is made of concentration 20wt%~30wt%, such as the hydrochloric acid solution and flyash of 22wt%, 25wt% or 28wt%,
The content of flyash is 200-300g/L, such as 220g/L, 250g/L or 280g/L in the slurry；Speed of agitator be 1-2 turn/
Second；Test temperature can be substantially identical as above-mentioned leaching temperature range, such as 120 DEG C -160 DEG C, such as 130,140 or 150 DEG C.
The invention has the following beneficial effects:
1 present invention uses the screw thread rotation connection structure of cup lid and cup body, under the action of diaphragm and retaining ring, Ji Nengqi
To completely cutting off, internal acid gas is elegant outward, guarantees the index accurate impression of Test Cycle, and can sustain by the connection between screw thread
Brought internal pressure increases problem since temperature raises, it is ensured that the safety of experiment.
2 present invention as stirring shaft material, ensure that slewing exists using titanium alloy material (TC10) to the full extent
Required torsion stiffness when torsion, while work condition environment being made to reach minimum to the extent of corrosion of material again.
3 agitating paddles of the invention use tower structure, facilitate inlaying and installing for sample, while using stainless steel lantern ring
It is fixed, increases the overall stiffness of agitating paddle, be conducive to the progress of stirring test；In addition, using polytetrafluoro as stirring
Paddle material can be subjected to environmental corrosion, and substantially reduce its difficulty of processing and cost.
4 agitating shafts of the invention and agitating paddle connects using thread forms, make the agitating paddle disassembly after testing every time and more
It is more convenient to change, while guaranteeing the connection reliability of agitating paddle and agitating shaft.
5 present invention, as internal cup body material, on the one hand enhance the anti-of cup body experimental section using corundum ceramic material
Acid corrosion ability；Simultaneously as its temperature tolerance and processing and forming type are good, thermostabilization is higher, can directly process screw thread to twine
Around resistance wire, keep whole design simple, is easy miniaturization processing.
6 present invention use the epoxy resin of corrosion-and high-temp-resistant to stick coating material of the agent as cup body inner wall, can prevent
Slurry solution can alleviate the solid granulates in slurry solution in ceramics under the high temperature conditions to micro- infiltration of ceramic material
Wall site carries out washing away corrasion, and every time after test, can be according to the thickness of coating and the abrasion condition of appearance, carry out office
The cleaning and repairing in portion, extend the service life of equipment.
7 present invention are the leakage volatilization that prevents the sour gas when agitating shaft rotates, in cup lid, diaphragm retaining ring and heat-insulated
It is inserted into central column graphite tube packing in the annular clearance space that gasket and agitating shaft are formed, passes through the solid-state self-lubricating of graphite material
Property and heatproof anti-corrosive properties are stirred between axis and gasket and seal, and effectively prevent the volatilization of sour gas.
Biography of 8 present invention using carbofrax material as cup body insulating back-up material, between making inside cup body and outside cup body
Thermal effect substantially reduces, and enhances the thermal insulation property of equipment.
9 present invention not only play the role of heat-insulation and heat-preservation using rubber material filling silicon carbide cylinder and stainless steel casing, but also
It can alleviate because thermal expansion coefficient differs thermal stress issues brought by biggish two kinds of materials.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of test equipment of the invention.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in detail.As shown in Figure 1, in one embodiment, it is of the invention
Test equipment, including cup body, sealed cup cover component, mixing component and temperature conditioning unit, wherein the cup body includes 1 He of outer cup
It is set in the outer cup 1 and is formed between outer cup the interior cup body 2 of annular space；The sealed cup cover component include with it is described
The compatible cup lid 3 of outer cup 1 and ceramic insulation gasket 4, and sealing diaphragm 5 and diaphragm retaining ring 6, the ceramic insulation gasket
4 in a ring and its lower end surface is equipped with annular protrusion compatible with the annular space, and the ceramic gasket 4 is arranged in the cup lid
Between 3 and outer cup 1, for sealing the outer cup 1 with the cup lid 3 cooperation；The lower end of the cup lid 3 is equipped with round convex
It rises, the side wall of the circular protrusions is equipped with the screw thread matched, 5 He of sealing diaphragm with the upper end of interior 2 inner wall of cup body
Diaphragm retaining ring 6 is from top to bottom successively fitted in the lower surface of the circular protrusions of the cup lid 3, for protecting the circular protrusions
Lower surface；The mixing component includes the agitating shaft 8 of motor 7, stirring parts 9 and the connection motor 7 and stirring parts 9, described to stir
Mixing 8 axis is located at the stirring parts 9 in the interior cup body 2 across the cup lid 3, sealing diaphragm 5 and the extension of diaphragm retaining ring 6；Institute
The thermocouple 101 and heating wire 102 that temperature conditioning unit 10 includes coupling setting are stated, the thermocouple 101 passes through the cup lid 3 and protrudes into
To monitor temperature in interior cup body 2, the heating wire 102 is wound on the outer wall of the interior cup body 2 in heat the interior cup body 2
Material in cup body 2.The coupling setting of thermocouple 101 and heating wire 102 refers to the heating wire 102 in the temperature conditioning unit 10
Heating power can carry out feedback condition according to the monitoring temperature of thermocouple 101, and the temperature control in interior cup body 2 is being needed
In the range of, being specifically configured to it is known in the art which is not described herein again between the two.
In one embodiment, the stirring parts 9 include stirring slurry 91 and lantern ring 92, and the stirring slurry 91 is processed into box
The inside of formula agitating paddle, the box of the block form agitating paddle is equipped with groove, for sample to be tested to be embedded in box；It is described
Lantern ring 92 is set in outside the box, for the sample to be tested of insertion to be fixed to the block form agitating paddle 91.It is described to stir
Mixing 8 material of axis is titanium alloy material, more preferable TC10；91 material of stirring slurry is polytetrafluoroethylene (PTFE), and the lantern ring 92 is to breathe out
Family name's alloy B.
In one embodiment, it is machined with spiral groove on the outer wall of the interior cup body 2, the heating wire 102 is along described
Spiral groove is wound on the outer wall of the interior cup body 2.The interior cup body 2 is corundum ceramic cup body, and inner wall is coated with asphalt mixtures modified by epoxy resin
Rouge coating 21；The outer cup 1, including silicon carbide internal layer 11, stainless steel outer layer 12, and for cohering the silicon carbide internal layer
11 with the intermediate adhesive layer of stainless steel outer layer 12；Preferably, the adhesive layer is silicon rubber；1 lower end of outer cup is set
There is pedestal 13.The cup lid 3 is process by stainless steel material, preferably 1Cr18Ni9Ti material；The motor 7 is miniature rotation
Motor is fixed on the cup lid 3.
In one embodiment, the cup lid 3, sealing diaphragm 5 and diaphragm retaining ring 6 between and the cup lid 3 and ceramics
Between heat insulating mattress 4, it is bonded together by epoxy resin；Preferably, the ceramic insulation gasket 4 is added by aluminium oxide ceramics
Work is made, and wherein alumina content is not less than 96wt%, and the sealing diaphragm 5 and 6 material of diaphragm retaining ring are respectively neoprene
And polytetrafluoroethylene material.Between the annular formed between the cup lid 3, sealing diaphragm 5 and heat insulating mattress 6 and agitating shaft 8
Ring-cylindrical graphite-pipe is packed into gap；Preferably, graphite-pipe outer wall coating epoxide resin material with the sealing diaphragm, every
Heat pad piece forms self-lubricating seal structure.The cup lid, seals matching for diaphragm, diaphragm retaining ring and graphite-pipe at ceramic insulation gasket
The sealing function for hindering acid volatilization gas excessive can be effectively played by closing setting.
It is combined above-mentioned test equipment further below and is tested that examples illustrate the present invention.
Test equipment
As shown in Figure 1, cup lid 3 (20 × 2cm of φ) is process by stainless steel, specially 1Cr18Ni9Ti material, cup lid 3
The fixed miniature rotating electric machine 7 (90ZYT52 permanent magnet DC motor) in top, the circular protrusions side wall (10 × 5cm of φ) of 3 lower end of cup lid
Band screw thread, is attached sealing by screw thread rotation with interior 2 upper inside wall threaded portion of cup body (10 × 5cm of φ).Thermocouple 101
For corrosion resistance platinum-rhodium alloy thermocouple, concrete model WPR14F is installed at the 1/4R in 3 center of circle of cup lid, and test lead is inserted
Enter in the test slurry solution inside interior cup body 2, outer end is connected with the thermocouple sensor of warm control unit 10.Ceramic heat-insulating cushion
Piece 4 is annular multilayered structure (in the ring structure of upper layer: inner ring φ 10cm, outer ring φ 20cm, thickness 1cm；Lower layer's annular protrusion
In: inner ring φ 12cm, outer ring φ 15cm, thickness 4cm), the annular portions of lower layer to the tip portion of annular space carry out every
Heat seal, the aluminium oxide ceramics that material is 96%.It seals diaphragm 5 (outer ring: φ 10cm inner ring: φ 1.5cm thickness: 0.5cm)
And diaphragm retaining ring 6 (outer ring: φ 10cm inner ring: φ 2cm thickness: 0.5cm) plays the sealing for hindering acid volatilization gas excessive and makees
With material is respectively neoprene and polytetrafluoroethylene material, uses central column stone with the annular gap that agitating shaft 8 is formed
Black pipe filling, it is highly 1cm that the wall thickness of tubing, which is 1cm, and graphite pipe outer wall is using high-temperature-resistant epoxy resin material and sealing diaphragm
5, the inner wall circle bonding of diaphragm retaining ring 6.Agitating shaft 8 (1 × 15cm of φ) is titanium alloy T C10 material, upper end and 7 phase of micromotor
Even, there is external screw thread at lower end port, there is internal screw thread at the port of stirring slurry 91 connected to it, the two passes through helicitic texture knot
It closes.Stirring slurry 91 is high density polytetrafluoro material, is processed into frame type agitating blade (5 × 5cm), test sample, which is processed into, to be bumped into
In the groove of the outer prismatic squarely structure of stirring slurry 91 (4.5 × 4.5cm), agitating paddle 91 and sample are closed by housing Kazakhstan
Golden B lantern ring 92 is fixed.
The outer cup 1 (20 × 30cm of φ) being arranged on pedestal 13 includes silicon carbide internal layer 11 and stainless steel outer layer 12, is incited somebody to action
Silicon carbide internal layer 11 is processed into cylinder-shaped (19 × 25 wall thickness 3 of φ), and outer cover is with stainless steel outer layer barrel (φ 20 × 25cm wall thickness
2cm), agent can be sticked at gap by silastic material and coheres encapsulation, entirety is used as the heat-barrier material and shell of cup body.Interior cup body
The ceramic material of 2 (12 × 25cm of φ wall thickness 2cm) is corundum alumina ceramic material, and outer wall is processed helical groove,
Thereon by the winding of Ni-Cr helical form heating wire 102, the both ends of heating wire 102 are connected with the switch module of temperature conditioning unit.Inner cup
The inner wall of the ceramic material of body is coated with the epoxy coating 21 of corrosion-and high-temp-resistant, and smearing thickness is 2~3mm, smearing
Height is ceramic inner walls screw thread (from the downward 5cm of rim of a cup) hereinafter, every time after test experiments, checks whether coating is lost, lacks
The position for undermining abrasion can coating epoxy resin again.
Measure a step acid extracting equipment and materials corrosion life, test condition 1 are as follows: HCl content 25%, Gu contain (flyash)
250g/L, 120 DEG C of temperature.Sample is installed in stirring slurry, is uninterruptedly rotated 10 days in cup body with 2 revolutions per seconds of revolving speed.
Test condition 2 are as follows: HCl content 20%, Gu contain (flyash) 300g/L, 140 DEG C of temperature.Sample is installed in stirring
On blade, uninterruptedly rotated 10 days in cup body with 1.5 revolutions per seconds of revolving speed.
Test condition 3 are as follows: HCl content 30%, Gu contain (flyash) 200g/L, 110 DEG C of temperature.Sample is installed in stirring
On blade, uninterruptedly rotated 10 days in cup body with 1 revolutions per second of revolving speed.
Its test item is by the mass change of sample before and after measurement sample, according to the calculation formula (1) of corrosion rate
The corrosion rate under the operating condition of sample is calculated, and then calculates the service life of material.
Formula:
Wherein: v-corrosion rate, unit mm/h；W0-starting weight, unit g；
W1-end weight, unit g；ρ-density, unit g/cm3；
S-surface area, unit mm2；H-test period, unit are hour
The corrosion life is calculated according to formula (2)
F=D/v (2)
Wherein: f-corrosion life；The corrosion allowance that D-material allows
Embodiment 1-3
(1) cavity material of the ceramic valve in the molten reactor bottom exit of acid is cut into 3 samples (4.5 × 4.5cm).
(2) it will be cleaned after sample mark with distilled water and ethyl alcohol, 60 DEG C of dryings of constant temperature for 24 hours, then claim in an oven
The starting weight of 1,2, No. 3 parallel sample is write down again.
(3) 1,2, No. 3 parallel sample is fixed on agitating paddle by Hastelloy B lantern ring.
(4) it is tested respectively according to test condition 1,2 and 3 in test chamber full of test slurries.
(5) test after the completion of stop test and remove sample, after then sample is cleaned with distilled water and ethyl alcohol respectively
60 DEG C of dryings of constant temperature for 24 hours and are weighed in baking oven, write down the end weight of 1,2, No. 3 parallel sample.
Show that corrosion wear rate is shown in Table 6 by the calculation formula of corrosion rate.
The corrosion life data of 6 valve ceramic material of table
To prevent valve erosion from revealing, corrosion allowance permissible value≤1.5mm inside valve cavity, according to said determination
Data and corrosion life formula (2) calculate, and can estimate its average corrosion service life is about 10.5.
In actual operation, the dissolution reaction kettle applied to " a step acid extracting " aluminum-extracted pulverized fuel ash of Shenhua quasi- energy, often
Year operating condition is basic are as follows: concentration of hydrochloric acid 20-30wt%, the molar ratio of aluminium oxide is 4.5 in HCl and flyash in hydrochloric acid:
1-9:1, leaching temperature are 120 DEG C -150 DEG C；
The ceramic valve that its outlet at bottom newly changes is after in running order 3 years ' operation, when maintenance removes, internal corrosion
The most seriously place's depth is about 0.435mm, it follows that its average corrosion rate of depreciation V is about 0.145, with above-described embodiment institute
Obtain the V of average corrosion rate of depreciationIt is flatDifference is no more than ± the 10% of average corrosion rate of depreciation V.Thus, it is possible to think the present invention
Test equipment and test method in a step acid extracting in the estimation of the resistant material corrosion life of equipment therefor have compared with
Good reliability.
Claims (10)
1. a kind of test equipment of resistant material corrosion life, which is characterized in that the test equipment includes cup body, seal cup
Cap assemblies, mixing component and temperature conditioning unit, wherein
The cup body includes outer cup and the interior cup body for being set in the outer cup and being formed between outer cup annular space；
The sealed cup cover component includes cup lid compatible with the outer cup and ceramic insulation gasket, and sealing diaphragm and
Diaphragm retaining ring, the ceramic insulation gasket is in a ring and its lower end surface is equipped with annular protrusion compatible with the annular space, institute
It states ceramic gasket to be arranged between the cup lid and outer cup, for sealing the outer cup with cup lid cooperation；The cup
The lower end of lid is equipped with circular protrusions, and the side wall of the circular protrusions is equipped with the spiral shell matched with the upper end of wall in the inner cup body
Line, the sealing diaphragm and diaphragm retaining ring are from top to bottom successively fitted in the lower surface of the circular protrusions of the cup lid, for preventing
Protect the lower surface of the circular protrusions；
The mixing component includes the agitating shaft of motor, stirring parts and the connection motor and stirring parts, and the agitating shaft passes through
The cup lid, sealing diaphragm and the extension of diaphragm retaining ring are located at the stirring parts in the inner cup body；
The temperature conditioning unit includes the thermocouple and heating wire of coupling setting, and the thermocouple passes through the cup lid and protrudes into described
Cup body is to monitor inner cup body temperature, to heat material in inner cup body on the outer wall of the heating wire winding to the interior cup body.
2. test equipment according to claim 1, which is characterized in that the stirring parts include stirring slurry and lantern ring, described
Stirring slurry is processed into block form agitating paddle, and the inside of the box of the block form agitating paddle is equipped with groove, is used for sample to be tested
Product are embedded in box；The lantern ring is set in outside the box, for the sample to be tested of insertion to be fixed to the block form
Agitating paddle.
3. according to test equipment described in right 2, which is characterized in that the stirring shaft material is titanium alloy material, more preferably
TC10；The stirring pulp material is polytetrafluoroethylene (PTFE), and the lantern ring is Hastelloy B.
4. test equipment according to any one of claim 1-3, which is characterized in that processed on the outer wall of the interior cup body
There is spiral groove, the heating wire is along the outer wall that the spiral groove is wound to the interior cup body.
5. test equipment according to claim 4, which is characterized in that the interior cup body is corundum ceramic cup body, inner wall
It is coated with epoxy coating；
The outer cup includes silicon carbide internal layer, stainless steel outer layer, and for cohering outside the silicon carbide internal layer and stainless steel
The intermediate adhesive layer of layer；Preferably, the adhesive layer is silicon rubber.
6. test equipment according to claim 5, which is characterized in that the cup lid is process by stainless steel material, excellent
Select 1Cr18Ni9Ti material；The motor is miniature rotating electric machine, is fixed on the cup lid.
7. the test equipment according to any one of right 1-6, it is characterised in that: the cup lid, sealing diaphragm and diaphragm are kept off
Between circle and between the cup lid and ceramic insulation gasket, it is bonded together by epoxy resin；Preferably, described in
It seals diaphragm and diaphragm collar material is respectively neoprene and polytetrafluoroethylene material.
8. according to test equipment described in right 7, it is characterised in that: in the cup lid, seal diaphragm and heat insulating mattress and stir
Mix loading Ring-cylindrical graphite-pipe in the annular gap formed between axis；Preferably, epoxy resin material is coated in the outer wall of graphite-pipe
Expect to form self-lubricating seal structure with the sealing diaphragm, heat insulating mattress.
9. the test method of the resistant material corrosion life of equipment therefor in a step acid extracting, which is characterized in that using as weighed
Benefit requires test equipment described in any one of 1-8, and sample is fixed to the stirring and is tested upper in acid condition；
By the mass change of sample before and after measurement sample, to calculate the corrosion rate under the operating condition of sample, and then obtain resistance to
The corrosion life of corrosion material；Wherein,
The corrosion rate is calculated according to formula (1):
Wherein: v-corrosion rate, unit mm/h；W0-starting weight, unit g；
W1-end weight, unit g；ρ-density, unit g/cm3；
S-surface area, unit mm2；H-test period, unit are hour.
The corrosion life is calculated according to formula (2)
F=D/v (2)
Wherein: f-corrosion life；The corrosion allowance that D-material allows.
10. according to test method described in right 9, it is characterised in that: when test, be equipped in the inner cup body and flood the stirring
The slurry of part, the slurry are made of the hydrochloric acid solution and flyash of concentration 20wt%~30wt%, flyash in the slurry
Content be 200-300g/L, speed of agitator be 1~2r/s；Temperature is room temperature~110 DEG C.
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| CN111575629B (en) * | 2020-05-18 | 2022-07-26 | 神华准能资源综合开发有限公司 | Anti-corrosion composite layer, application and preparation method of anti-corrosion composite lining layer |
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