CN105948766A - Aluminum dihydrogen phosphate-silicon carbide refractory ramming material and preparation method thereof - Google Patents
Aluminum dihydrogen phosphate-silicon carbide refractory ramming material and preparation method thereof Download PDFInfo
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- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6306—Binders based on phosphoric acids or phosphates
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- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
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Abstract
A preparation method for an aluminum dihydrogen phosphate-silicon carbide refractory ramming material comprises the following steps: step one, preparing a base material: according to the mass percentage, weighing 30-50% of green silicon carbide sand with the particle size of No.24, 20-30% of green silicon carbide sand with the particle size of No.80, 10-20% of a green silicon carbide powder with the particle size of W80 and 5-10% of a green silicon carbide powder with the particle size of W7; and then pouring the weighed raw materials into a stirrer, and mechanically stirring and mixing for 2-3 minutes; step two, preparing a wet material: adding an industrial aluminum phosphate solution with the amount 5-10% of the total amount of the base material into the base material prepared in the step one, and continuing to stir; step three, ageing the material: sealing the wet material prepared by the step two in a sealed container, allowing air not to be left in the container, and ageing the material for 16-24 hours; and step four, blending the material: again adding an industrial aluminum phosphate solution with the amount 5-10% of the total amount of the base material into the wet material subjected to ageing treatment, stirring for 3-5 minutes, and thus obtaining the refractory ramming material for construction.
Description
Technical field
The present invention relates to fire-resistant ramming material preparation field, particularly to a kind of furnace lining as air flow bed coal gasification equipment
Biphosphate aluminium silicon carbide fire-resistance rammed mass and preparation method thereof.
Background technology
Refractory material is the basic material in high-temperature technology field, and application is quite varied, wherein applies most often respectively
Plant structural material and liner as opposing high temperature action in Thermal Equipment and elevated temperature vessel.But it is different according to operations department, very
To being the different parts at same equipment, working condition is the most not the same, therefore, and the requirement the most difference to refractory material.
Market the most at home, air flow bed coal gasification equipment has been widely used for bituminous mixing plant firing equipment, dry powder and mortar
Drying equipment, rotary kiln firing equipment.This equipment possesses that single furnace output is big, carbon conversion ratio high, high-efficiency cleaning, load when running
The advantages such as range of accommodation property wide, controllable is strong.This type of air flow bed coal gasification equipment different parts is chronically under different high temperature and makes
With, operation, it may occur however that physics, chemistry, machinery etc. act on, and make material deform, soften, melt, or be etched, erosion,
Or the phenomenons such as damage of bursting apart, it is not only possible to making operation persistently to carry out, the military service making material is interim disconnected, and impact produces,
And affect product quality quality, therefore the refractory material with opposing high temperature action must be used.
In order to solve this technical problem, enable air flow bed coal gasification equipment to be preferably served by bituminous mixing plant and heat
Equipment, dry powder and mortar drying equipment, rotary kiln firing equipment, the present invention herein proposes one and is made exclusively for air flow bed coal gasification
Fire-resistance rammed mass that equipment air flow bed body liner uses and preparation method thereof.
Summary of the invention
It is an object of the invention to provide a kind of biphosphate aluminium silicon carbide fire-resistance rammed mass and preparation method thereof, it is to be solved
Technical problem is: in existing air flow bed coal gasification equipment, the working condition for different parts is different, it is desirable to provide different
Refractory lining, especially need the fire-resistance rammed mass being suitable for operating mode the most as liner inside air flow bed coal gasification apparatus body.
For solving above-mentioned technical problem, the present invention provides a kind of biphosphate aluminium silicon carbide fire-resistance rammed mass, it include base material and
Bonding agent, the mass percentage content of the starting components of described base material is as follows:
Described bonding agent accounts for the 10～20% of described base material total amount.
Be preferable over: described bonding agent be concentration be the industrial phosphoric acid aluminum solutions between 40～70%.
It is preferable over: the mass percentage content of the starting components of described base material is as follows:
Described industrial phosphoric acid aluminum solutions accounts for the 13% of described base material total amount.
A kind of biphosphate aluminium silicon carbide fire-resistance rammed mass preparation method, it comprises the following steps:
The first step, standby base material: weigh by mass percentage the green silicon carbide sand 30 of 24# granularity～50%, the green carbonization of 80# granularity
Silica sand 20～30%, the green silicon carbide powder of W80 granularity 10～20%, the green silicon carbide powder 5～10% of W7 granularity；Then
Pouring in blender by load weighted above-mentioned raw material, mechanical agitation mixes 2～3 minutes；
Second step, prepares wet feed: add in the base material that the first step is got ready and account for described base material total amount 5～the industrial phosphoric acid aluminum of 10%
Solution, proceeds stirring；
3rd step, ageing mixture: the wet feed that second step prepares is sealed in airtight container, gas of not leaving a blank in container, carries out ageing mixture
16～24 hours；
4th step, spice: add again in the described wet feed processed through ageing mixture and account for described base material total amount 5～the industrial phosphoric acid aluminum of 10%
Solution, stirs 3～5 minutes, and i.e. preparing can be used for constructing coats the fire-resistant of the furnace interior to air flow bed coal gasification equipment
Ramming mass.
It is preferable over: after the fire-resistance rammed mass construction that will prepare after above-mentioned 4th step spice, carry out maintenance: in ambient temperature higher than 10 DEG C
Natural environment in maintenance, forbid to water.
It is preferable over: described curing time is: when ambient temperature is between 15～25 DEG C, is 7 days；When ambient temperature 25～
Time between 40 DEG C, it it is 3 days.
It is preferable over: after described maintenance terminates, carries out heat treatment:
First stage, to dry moisture, 31 hours altogether, with 20 DEG C as initial temperature, rise 10 DEG C per hour by average
Heating rate, be warming up to 60 DEG C after 4 hours, constant temperature 6 hours, then by the average heating rate rising 10 DEG C the most per hour, 5
110 DEG C it are warming up to after hour, constant temperature 6 hours, then by the average heating rate rising 10 DEG C per hour, heats up after 4 hours
To 150 DEG C, constant temperature 6 hours；
Second stage, dries moisture and with different chemical reactions, 25 hours altogether, with 150 DEG C as initial temperature, presses
The average heating rate rising 20 DEG C per hour, is warming up to 300 DEG C after 7.5 hours, constant temperature 4 hours, then by averagely going up per hour
Rise the heating rate of 20 DEG C, after 7.5 hours, be warming up to 450 DEG C, constant temperature 6 hours, terminates heat treatment, i.e. makes final lining and set
At the biphosphate aluminium silicon carbide fire-resistance rammed mass within air flow bed coal gasification apparatus body.
Compared with prior art, the invention has the beneficial effects as follows: a kind of biphosphate aluminium silicon carbide prepared by the present invention is fire-resistant to be smash
Dnockout directly can contact with ash fused mass in coal, has preferable fire resistance, wearability, resistance to slag and thermal shock resistance；This
Fire-resistance rammed mass prepared by invention is half-dried fluffy, without cohesiveness before molding, only could obtain under with strength ramming
Closely knit structure；In construction by fire-resistance rammed mass coating to air flow bed coal gasification apparatus body inside and at suitable heat
After reason, bonding agent is made to obtain higher intensity after producing strength combination；Water quick cooling method is used fire-resistant to smash two kinds at laboratory
When dnockout goods thermal shock resistance detects, thermal shock resistance (1100 DEG C, water-cooled) number of times is all higher than 50 times；The present invention produces work
Skill is simple, and service life is long, and it is convenient to repair, and effectively solves air flow bed coal gasification equipment refractory heat-insulating problem.
Accompanying drawing explanation
Fig. 1 is the preparation method schematic flow sheet of the present invention.
Fig. 2 is the first stage heat treatment heating curve schematic diagram of the present invention.
Fig. 3 is the second stage heat treatment heating curve schematic diagram of the present invention.
Detailed description of the invention
A kind of biphosphate aluminium silicon carbide fire-resistance rammed mass present invention proposed below with reference to each preferred embodiment and accompanying drawing 1-3
And preparation method thereof be described in greater detail below.
The present invention provides a kind of biphosphate aluminium silicon carbide fire-resistance rammed mass, and the test parameter of its raw material percentages and finished product is detailed
See table one, it is used in the furnace interior of air flow bed coal gasification equipment as liner, and it includes base material and bonding agent, as
Shown in Fig. 1, its preparation methods steps is as follows: first, standby base material 1000kg, the percent mass of the starting components of described base material
Than being:
And then, weigh green silicon carbide sand 300kg, W80 granularity green of green silicon carbide sand 400kg, 80# granularity of 24# granularity
The green silicon carbide powder 100kg of sic powder 200kg, W7 granularity；Pour load weighted above-mentioned raw material into horizontal mortar to stir
Mix in machine, mechanical agitation mix 2～3 minutes, after stirring, the material mixed is poured in material storage tube, labelled with
Make standby, it should be noted that: material need be dried, be not allow for bonding phenomenon occur, stirring should fully but should not long,
In order to avoid destroying original grating；Then, standby bonding agent, described bonding agent be concentration be that the industrial phosphoric acid aluminum between 40～70% is molten
Liquid, it accounts for the 10～20% of described base material total amount, and described bonding agent is put in described base material in two steps, at the above-mentioned base got ready
Material adds the industrial phosphoric acid aluminum solutions of 80kg, proceeds stirring, obtain wet feed；The wet feed obtained is sealed in airtight appearance
In device, gas of not leaving a blank in container, carry out ageing mixture 16～24 hours；50kg is added in the described wet feed processed through ageing mixture
Industrial phosphoric acid aluminum solutions, stir 3～5 minutes, i.e. prepare the furnace interior that can be used for coating to air flow bed coal gasification equipment and make
Fire-resistance rammed mass for liner；
Secondly, maintenance, after being constructed by the fire-resistance rammed mass prepared after above-mentioned spice, at the ambient temperature nature higher than 10 DEG C
Maintenance in environment, forbids to water；Described curing time is: when ambient temperature is between 15～25 DEG C, is 7 days；Work as environment
When temperature is between 25～40 DEG C, it it is 3 days；
Finally, after described maintenance terminates, carry out heat treatment (heat treatment parameter is as shown in following table two):
First stage, heat treatment heating curve as in figure 2 it is shown, to dry moisture, 31 hours altogether, with 20 DEG C for rising
Beginning temperature, by the average heating rate rising 10 DEG C per hour, is warming up to 60 DEG C after 4 hours, constant temperature 6 hours, then by average
Rising the heating rate of 10 DEG C per hour, be warming up to 110 DEG C after 5 hours, constant temperature 6 hours, then by averagely rising per hour
The heating rate of 10 DEG C, is warming up to 150 DEG C after 4 hours, constant temperature 6 hours；
Second stage, heat treatment heating curve is as it is shown on figure 3, dry moisture and adjoint different chemical reaction, and 25 is little altogether
Time, with 150 DEG C as initial temperature, by the average heating rate rising 20 DEG C per hour, after 7.5 hours, it is warming up to 300 DEG C, permanent
Temperature 4 hours, then by the average heating rate rising 20 DEG C per hour, after 7.5 hours, it is warming up to 450 DEG C, constant temperature 6 hours, knot
Bundle heat treatment, i.e. makes final lining and is located at the fire-resistant ramming of biphosphate aluminium silicon carbide within air flow bed coal gasification apparatus body
Material.
Table one:
Table two:
Note: the furnace interior coated described in heat treatment process to air flow bed coal gasification equipment is as the fire-resistant ramming of furnace lining
Expecting the most unstable within the temperature range of 200～400 DEG C, after the moisture absorption, easily efflorescence is peeled off, and therefore carries out being heat-treated to this temperature
It should be particularly noted that can not stop halfway time interval, the temperature listed by table two is according to furnace lining during baker
High-temperature point is formulated, and therefore, is drying with heat treatment process, is heating up and refer to furnace lining maximum temperature with rate of temperature fall
Show to control, be actually also required to look after the furnace lining at minimum temperature instruction, therefore, actual drying and heat treatment time
Should be more than the time listed on table.
Comprehensive described, technical scheme sufficiently effective can complete foregoing invention purpose, and the structure of the present invention is former
Reason and principle of work and power are the most sufficiently verified, and can reach intended effect and purpose, and the present invention
Embodiment can also convert according to these principles, and therefore, the present invention includes that all are previously mentioned scope in claim
Interior all replacement contents；Any equivalence change made in scope of the present invention patent, all belongs to the patent model of this case application
Within enclosing；It should be pointed out that, for those skilled in the art, in the premise without departing from the technology of the present invention principle
Under, it is also possible to making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
1. a biphosphate aluminium silicon carbide fire-resistance rammed mass, it is characterised in that: include base material and bonding agent, described base material
The mass percentage content of starting components is as follows:
Described bonding agent accounts for the 10～20% of described base material total amount, and described bonding agent is industrial phosphoric acid aluminum solutions.
2. biphosphate aluminium silicon carbide fire-resistance rammed mass as claimed in claim 1, it is characterised in that: the raw material of described base material
The mass percentage content of component is as follows:
Described industrial phosphoric acid aluminum solutions accounts for the 13% of described base material total amount.
3. a biphosphate aluminium silicon carbide fire-resistance rammed mass preparation method, it is characterised in that comprise the following steps:
The first step, standby base material: weigh by mass percentage the green silicon carbide sand 30 of 24# granularity～50%, the green carbonization of 80# granularity
Silica sand 20～30%, the green silicon carbide powder of W80 granularity 10～20%, the green silicon carbide powder 5～10% of W7 granularity；Then
Pouring in blender by load weighted above-mentioned raw material, mechanical agitation mixes 2～3 minutes；
Second step, prepares wet feed: add in the base material that the first step is got ready and account for described base material total amount 5～the industrial phosphoric acid aluminum of 10%
Solution, proceeds stirring；
3rd step, ageing mixture: the wet feed that second step prepares is sealed in airtight container, gas of not leaving a blank in container, carries out ageing mixture
16～24 hours；
4th step, spice: add again in the described wet feed processed through ageing mixture and account for described base material total amount 5～the industrial phosphoric acid aluminum of 10%
Solution, stirs 3～5 minutes, i.e. prepares the fire-resistance rammed mass that can be used for construction.
4. biphosphate aluminium silicon carbide fire-resistance rammed mass preparation method as claimed in claim 3, it is characterised in that: by above-mentioned the
After the fire-resistance rammed mass construction prepared after four step spices, carry out maintenance: maintenance in the ambient temperature natural environment higher than 10 DEG C,
Forbid to water.
5. biphosphate aluminium silicon carbide fire-resistance rammed mass preparation method as claimed in claim 4, it is characterised in that: described maintenance
Time is: when ambient temperature is between 15～25 DEG C, be 7 days；When ambient temperature is between 25～40 DEG C, it it is 3 days.
6. biphosphate aluminium silicon carbide fire-resistance rammed mass preparation method as claimed in claim 5, it is characterised in that: described maintenance
After end, carry out heat treatment:
First stage, to dry moisture, 31 hours altogether, with 20 DEG C as initial temperature, rise 10 DEG C per hour by average
Heating rate, be warming up to 60 DEG C after 4 hours, constant temperature 6 hours, then by the average heating rate rising 10 DEG C the most per hour, 5
110 DEG C it are warming up to after hour, constant temperature 6 hours, then by the average heating rate rising 10 DEG C per hour, heats up after 4 hours
To 150 DEG C, constant temperature 6 hours；
Second stage, dries moisture and with different chemical reactions, 25 hours altogether, with 150 DEG C as initial temperature, presses
The average heating rate rising 20 DEG C per hour, is warming up to 300 DEG C after 7.5 hours, constant temperature 4 hours, then by averagely going up per hour
Rise the heating rate of 20 DEG C, after 7.5 hours, be warming up to 450 DEG C, constant temperature 6 hours, terminates heat treatment, i.e. makes final lining and set
At the biphosphate aluminium silicon carbide fire-resistance rammed mass within air flow bed coal gasification apparatus body.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777417A (en) * | 2020-07-29 | 2020-10-16 | 攀钢冶金材料有限责任公司 | Silicon carbide-carbon ramming mass for blast furnace slag high-temperature carbonization electric furnace and preparation method thereof |
| CN113292348A (en) * | 2021-05-10 | 2021-08-24 | 中国铝业股份有限公司 | Forming method of silicon carbide ramming mass |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1099018A (en) * | 1993-08-14 | 1995-02-22 | 湖南省新化县电子材料厂 | Silicon-carborundum refractory material |
| CN103435361A (en) * | 2013-08-19 | 2013-12-11 | 濮阳濮耐高温材料（集团）股份有限公司 | High-wear-proof high-thermal-shock-resistant fire-proof material and prefabricated furnace mouth part made from same |
-
2016
- 2016-04-27 CN CN201610269018.0A patent/CN105948766A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1099018A (en) * | 1993-08-14 | 1995-02-22 | 湖南省新化县电子材料厂 | Silicon-carborundum refractory material |
| CN103435361A (en) * | 2013-08-19 | 2013-12-11 | 濮阳濮耐高温材料（集团）股份有限公司 | High-wear-proof high-thermal-shock-resistant fire-proof material and prefabricated furnace mouth part made from same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777417A (en) * | 2020-07-29 | 2020-10-16 | 攀钢冶金材料有限责任公司 | Silicon carbide-carbon ramming mass for blast furnace slag high-temperature carbonization electric furnace and preparation method thereof |
| CN113292348A (en) * | 2021-05-10 | 2021-08-24 | 中国铝业股份有限公司 | Forming method of silicon carbide ramming mass |
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Application publication date: 20160921 |