CN111689779A - Porous ceramic body kiln coating in incineration rotary kiln and preparation method thereof - Google Patents
Porous ceramic body kiln coating in incineration rotary kiln and preparation method thereof Download PDFInfo
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- CN111689779A CN111689779A CN202010466120.6A CN202010466120A CN111689779A CN 111689779 A CN111689779 A CN 111689779A CN 202010466120 A CN202010466120 A CN 202010466120A CN 111689779 A CN111689779 A CN 111689779A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 36
- 239000011248 coating agent Substances 0.000 title claims abstract description 29
- 238000000576 coating method Methods 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000011521 glass Substances 0.000 claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000002699 waste material Substances 0.000 claims abstract description 24
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 229910021538 borax Inorganic materials 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 235000017550 sodium carbonate Nutrition 0.000 claims description 6
- 239000004328 sodium tetraborate Substances 0.000 claims description 6
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 claims description 2
- 229910000020 calcium bicarbonate Inorganic materials 0.000 claims description 2
- 235000010216 calcium carbonate Nutrition 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 235000012255 calcium oxide Nutrition 0.000 claims description 2
- 239000011736 potassium bicarbonate Substances 0.000 claims description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 2
- 235000011181 potassium carbonates Nutrition 0.000 claims description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract description 2
- 239000002920 hazardous waste Substances 0.000 description 15
- 239000011159 matrix material Substances 0.000 description 10
- 239000002893 slag Substances 0.000 description 10
- 239000011449 brick Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000006060 molten glass Substances 0.000 description 8
- 238000007599 discharging Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000001502 supplementing effect Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000012634 fragment Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
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Abstract
The invention belongs to the technical field of modification of refractory materials, and particularly relates to a porous ceramic body kiln coating in an incineration rotary kiln and a preparation method thereof. And operating the incineration rotary kiln to fully melt the waste glass, adding carbonate into the melted waste glass, reacting for a period of time, adding graphite powder into the incineration rotary kiln, cooling to a certain extent, and continuing to react for a period of time until the viscous glass is solidified into a porous ceramic body, wherein the kiln skin layer is attached to the inner wall of the incineration rotary kiln.
Description
Technical Field
The invention belongs to the technical field of modification of refractory materials, and particularly relates to a porous ceramic body kiln coating in an incineration rotary kiln and a preparation method thereof.
Background
The burning objects of the burning brick returning kiln are various industrial hazardous wastes, and the kiln bricks are easy to damage due to factors such as physical wear, thermal expansion and cold contraction caused by temperature change in the kiln and the like. Along with the accumulation of kiln brick damage, the heat insulation performance of rotary kiln reduces gradually, arouses the potential safety hazard easily, must stop to overhaul and change the kiln brick.
The large-scale incineration rotary kiln is very long in stopping or starting process, and can normally run only within 2-3 days, so that the large-scale incineration rotary kiln is prevented from being started or stopped as much as possible in actual running so as to reduce thermal expansion and cold contraction and ensure the economy of incineration.
In order to protect the kiln bricks and avoid frequent parking and maintenance, the inner wall of the large-scale incineration rotary kiln can be prepared to generate kiln skins to protect the kiln bricks, the chemical components of the kiln skins are mostly inorganic salts which are inert substances which cannot be continuously incinerated, and the performance of the kiln skins can directly determine the service life of the kiln bricks.
Disclosure of Invention
The invention provides a porous ceramic body kiln coating in an incineration rotary kiln and a preparation method thereof, according to the components, the kiln coating comprises glass, carbonate and graphite powder,
wherein the weight ratio of the glass to the carbonate is 1: 0.3 to 0.8 of a surfactant,
the weight ratio of the glass to the graphite powder is 1: 0.05 to 0.15 of a surfactant,
the carbonate is one or more of sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, calcium carbonate and calcium bicarbonate,
the invention also provides a preparation method of the porous ceramic body kiln coating in the incineration rotary kiln, which comprises the following steps: the burning rotary kiln is operated to lead the waste glass in the burning rotary kiln to be fully melted, carbonate is added into the melted waste glass, after reaction for a period of time, graphite powder is added into the burning rotary kiln, then the temperature is reduced to a certain extent, the reaction is continued for a period of time until the sticky glass is solidified into a porous ceramic body and the kiln skin is attached on the inner wall of the burning rotary kiln,
the preparation method is also called as 'kiln coating hanging', the operation of hanging the kiln coating is carried out at the opening stage of the incineration rotary kiln, at the moment, the interior of the kiln is relatively clean, so that no residue is basically mixed into the kiln coating, and after the operation of 'kiln coating hanging' is finished, the temperature in the kiln is kept at 800-900 ℃, and industrial hazardous waste is directly input for incineration; in addition, the industrial large-scale burning rotary kiln has the slag discharge function and can discharge most of slag in time, so that the situation that the slag is retained in the kiln and permeates into the kiln skin basically does not occur when the burning rotary kiln with the kiln skin is used subsequently,
wherein, when the waste glass is added, one or a combination of a plurality of quicklime, silicon dioxide, borax and aluminum oxide which account for 5-30% of the weight of the waste glass is added simultaneously to reduce the melting point of the waste glass,
the melting temperature of the waste glass in the burning rotary kiln is 1100-1400 ℃.
The waste glass is melted to form liquid sticky matter, the liquid sticky matter hangs a layer of kiln skin on the inner wall of a kiln along with the rotation of a kiln body, carbonate is added at the moment, the carbonate enters the viscous glass body material and decomposes carbon dioxide at high temperature to generate bubble holes in the kiln skin, after most of the bubble holes are generated, graphite powder is added, the melted glass matrix can be solidified to a certain degree by cooling to a certain extent after the graphite powder is added, and most of the added graphite powder stays and adheres to the kiln skin and the surfaces of the bubbles due to poor dissolubility and low density of the graphite powder in the melted glass body,
the bubble hole structure in the ceramic kiln shell can increase the heat insulation effect and reduce the comprehensive energy consumption of the rotary kiln during operation; the graphite powder is gathered at the position close to the surface of the ceramic kiln coating, so that the lubricating effect can be achieved, the friction between materials and the kiln coating is effectively reduced in the running process of the rotary kiln, the abrasion of the kiln coating is reduced, and the service life of the kiln coating is prolonged; in addition, the graphite material has a certain adsorption effect, can adsorb a certain amount of corrosive gas substances generated by the incineration of industrial hazardous wastes, reduces the chemical corrosion to the kiln skin,
the material of the ceramic body of the kiln coating is completely different from that of the ceramic body of the kiln coating taking glass as the main component, if the graphite powder is added too early, the kiln coating is not solidified, the graphite powder is easy to permeate into the kiln coating, the graphite quantity on the surface layer of the kiln coating is reduced, the graphite powder is soft, and the defect can be formed in the ceramic body when the excessive graphite powder enters the ceramic body, so that the formed ceramic body is loose, the strength of the ceramic body is reduced, therefore, the method firstly leads the carbonate to be fully decomposed and formed holes (the stable molten state of the glass matrix is required to be ensured in the hole forming stage, otherwise, the foaming and hole forming effect is influenced by the too hard matrix), then the temperature is reduced after the graphite powder is added to promote the solidification of the glass matrix, thereby further leading most of the added graphite powder to be only remained near the surface of the kiln coating and not to go deep into the kiln coating, therefore, the lubricating effect of the graphite powder can be maximized, and the influence of the graphite powder on the strength of the ceramic body can be reduced.
Drawings
FIG. 1 is a schematic view showing a structure of a bubble hole of a kiln skin of a porous ceramic body prepared in example 1 of the present application (obtained by cutting the remaining kiln skin on a kiln brick after the rotary kiln is stopped and cooled, and photographing the cut kiln skin after washing with water).
Detailed Description
Example 1
Adding 100 parts by weight of waste glass and 8 parts by weight of borax into an incineration chamber of an incineration rotary kiln, wherein when the incineration rotary kiln runs, the heating temperature in the incineration chamber is 1100-1200 ℃ (the incineration rotary kiln belongs to a large industrial device, the volume of a cavity in the kiln is large, and the temperature at each position is uneven, so that only a rough temperature range can be given in the actual operation process, the temperature range is the same below), the operation is carried out for 15 minutes under a micro negative pressure state until the waste glass is fully converted into a molten state, at the moment, adding 40 parts by weight of sodium carbonate into the molten glass, continuously keeping the incineration rotary kiln in the operation state for 40 minutes, then adding 12 parts by weight of graphite powder into the molten glass, adjusting the temperature in the incineration chamber to 800-900 ℃, keeping the micro negative pressure state unchanged, and after the operation is carried out for 100 minutes under the state, forming a stable porous ceramic body kiln skin on the inner, the thickness of the kiln skin is 18-20 cm;
keeping the temperature in the incineration chamber, adding industrial hazardous wastes into the incineration chamber without stopping the incineration chamber for carrying out incineration operation, wherein the incineration operation is continuously carried out without stopping the incineration chamber, and during the incineration period, regularly discharging slag and timely supplementing new industrial hazardous wastes. During burning, detect, record the temperature on burning the rotary kiln outer wall, carry out the multiple spot measurement (infrared thermometer carries out the multiple spot to burning the rotary kiln outer wall, constitute the temperature range that measures when this time by the highest temperature and the minimum temperature that measure at every turn, the same below), record and survey the time node (the number of days) when 180 ℃ and above for the first time, because according to experience in the trade, when burning rotary kiln outer wall temperature and reaching 180 ℃ and above, the kiln skin in the rotary kiln has become invalid in a large number, damaged, correspondingly leads to the heat-proof quality of kiln skin to obviously descend, need to hang the kiln skin operation again to burning the rotary kiln:
the initial temperature (the first day) during incineration is 86-102 ℃; the time node when the outer wall temperature is measured to be higher than 160 ℃ for the first time is 48 days, and the specific temperature range is 139-162 ℃; the time node when the outer wall temperature is measured to be higher than 180 ℃ for the first time is 53 days, the specific temperature range is 157-183 ℃, and according to the experience, kiln skins in the rotary kiln are largely failed and damaged, and the kiln skin hanging operation of the incineration rotary kiln needs to be carried out again.
Comparative example 1
The graphite powder was not added and the rest of the procedure was as in example 1:
adding 100 parts by weight of waste glass and 8 parts by weight of borax into an incineration chamber of an incineration rotary kiln, wherein when the incineration rotary kiln operates, the heating temperature in the incineration chamber is 1100-1200 ℃, the incineration chamber operates for 15 minutes under a micro negative pressure state until the waste glass is fully converted into a molten state, at the moment, 40 parts by weight of sodium carbonate is added into the molten glass, the incineration rotary kiln is continuously kept in the operating state for 40 minutes, then the temperature in the incineration chamber is adjusted to be 800-900 ℃, the micro negative pressure state is unchanged, and after the incineration rotary kiln operates for 100 minutes, a stable porous ceramic body kiln skin is formed on the inner wall of the incineration rotary kiln, and the thickness of the kiln skin is 18-20 cm;
keeping the temperature in the incineration chamber, adding industrial hazardous wastes into the incineration chamber without stopping the incineration chamber for carrying out incineration operation, wherein the incineration operation is continuously carried out without stopping the incineration chamber, and during the incineration period, regularly discharging slag and timely supplementing new industrial hazardous wastes. Wherein, the type, batch and operation parameters during burning of the industrial hazardous wastes are the same as those in embodiment 1, during burning, the temperature on the outer wall of the burning rotary kiln is detected and recorded, and the temperature measurement operation is the same as that in embodiment 1:
the initial temperature (day one) during incineration is 81-98 ℃; the time node when the outer wall temperature is measured to be higher than 160 ℃ for the first time is day 19, and the specific temperature range is 135-163 ℃; the time node when the outer wall temperature is measured to be higher than 180 ℃ for the first time is 24 days, the specific temperature range is 156-180 ℃, and according to experience, kiln skins in the rotary kiln are largely failed and damaged, and the kiln skin hanging operation of the incineration rotary kiln needs to be carried out again.
Comparative example 2
The carbonate and graphite powder were added simultaneously, and the rest of the procedure was as in example 1:
adding 100 parts by weight of waste glass and 8 parts by weight of borax into an incineration chamber of an incineration rotary kiln, wherein when the incineration rotary kiln operates, the heating temperature in the incineration chamber is 1100-1200 ℃, the incineration chamber operates for 15 minutes under a micro-negative pressure state until the waste glass is fully converted into a molten state, at the moment, 40 parts by weight of sodium carbonate and 12 parts by weight of graphite powder are simultaneously added into the molten glass, the incineration rotary kiln is continuously kept in the operating state for 40 minutes, the temperature in the incineration chamber is adjusted to be 800-900 ℃, the micro-negative pressure state is unchanged, and after the incineration rotary kiln operates for 100 minutes, a stable porous ceramic body kiln skin is formed on the inner wall of the incineration rotary kiln, and the thickness of the kiln skin is 18-21 cm;
keeping the temperature in the incineration chamber, adding industrial hazardous wastes into the incineration chamber without stopping the incineration chamber for carrying out incineration operation, wherein the incineration operation is continuously carried out without stopping the incineration chamber, and during the incineration period, regularly discharging slag and timely supplementing new industrial hazardous wastes. Wherein, the type, batch and operation parameters during burning of the industrial hazardous wastes are the same as those in embodiment 1, during burning, the temperature on the outer wall of the burning rotary kiln is detected and recorded, and the temperature measurement operation is the same as that in embodiment 1:
the initial temperature (the first day) during incineration is 88-107 ℃; the time node when the outer wall temperature is measured to be higher than 160 ℃ for the first time is day 18, and the specific temperature range is 127-161 ℃; the time node when the outer wall temperature is measured to be more than 180 ℃ for the first time is day 21, the specific temperature range is 161-182 ℃, and according to experience, kiln skins in the rotary kiln are largely invalid and damaged, and the kiln skin hanging operation of the incineration rotary kiln is required again.
Comparative example 2 and example 1 both have graphite powder added thereto, but show a significant difference in the effect of heat-insulating durability between comparative example 2 and example 1, with example 1 being significantly superior, while comparative example 2 is not even as good as the blank without graphite powder added thereto.
Some of the reasons for this are as the applicant believes in the summary above: after the graphite powder is added in the comparative example 2, the glass matrix is not cooled in time, and the high-temperature softening state causes more graphite powder to enter and disperse into the glass matrix instead of being enriched on the surface layer of the glass matrix, so that the graphite powder does not play a role in lubrication and wear reduction basically but does not play a role in lubrication and reduction and also reduces the strength of the matrix, therefore, compared with the case that the graphite powder is not added, the main body layer of the glass matrix ceramic kiln skin generated in the comparative example 2 is less wear-resistant, and the heat insulation durability is correspondingly lower;
contrary to example 1, the applicants believe that: after the abundant graphite powder of glass substrate top layer enrichment, even the top layer intensity reduces and lead to easy wearing and tearing, nevertheless because the region that here is the relative gathering of graphite powder, the graphite powder that gets off by wearing and tearing exists with the body form a lot, these graphite powders are based on self good absorption (depend on) ability, still can be attached to remaining kiln hood surface comparatively steadily, can not be by the whole discharge rotary kilns of once when arranging the sediment (of course, the time has long can be taken away by the slag charge gradually), consequently, even the graphite powder that drops, the material to the upset in the rotary kiln still has lasting lubrication antifriction effect, thereby continue to protect the kiln hood. In contrast, in comparative example 2, the graphite powder is much dispersed in the ceramic matrix, so after being worn, the graphite powder is more doped in the ceramic fragments which are worn down rather than independently existing, and in addition, the ceramic fragments can be easily discharged out of the rotary kiln during slag discharge, so that the graphite powder in the ceramic fragments can not continuously play a role in lubrication.
Example 2
Adding 100 parts by weight of waste glass and 12 parts by weight of aluminum oxide into an incineration chamber of an incineration rotary kiln, wherein when the incineration rotary kiln operates, the heating temperature in the incineration chamber is 1200-1300 ℃, the incineration chamber operates for 11 minutes under a micro negative pressure state until the waste glass is fully converted into a molten state, at the moment, 50 parts by weight of calcium carbonate is added into molten glass, the incineration rotary kiln is continuously kept in the operating state for 32 minutes, then 7 parts by weight of graphite powder is added into the molten glass, the temperature in the incineration chamber is adjusted to be 800-900 ℃, the micro negative pressure state is unchanged, and after the incineration rotary kiln operates for 120 minutes, a stable porous ceramic body kiln skin is formed on the inner wall of the incineration rotary kiln, and the thickness of the kiln skin is 23-25 cm;
keeping the temperature in the incineration chamber, adding industrial hazardous wastes into the incineration chamber without stopping the incineration chamber for carrying out incineration operation, wherein the incineration operation is continuously carried out without stopping the incineration chamber, and during the incineration period, regularly discharging slag and timely supplementing new industrial hazardous wastes. During the incineration, the temperature on the outer wall of the incineration rotary kiln is detected and recorded:
the initial temperature (day one) during incineration is 79-98 ℃; the time node when the outer wall temperature is measured to be higher than 160 ℃ for the first time is day 37, and the specific temperature range is 137-162 ℃; the time node when the outer wall temperature is measured to be more than 180 ℃ for the first time is day 41, the specific temperature range is 163-184 ℃, and according to the experience, a large amount of kiln skins in the rotary kiln are failed and damaged, and the kiln skin hanging operation of the incineration rotary kiln is needed again.
Example 3
Adding 100 parts by weight of waste glass and 16 parts by weight of borax into an incineration chamber of an incineration rotary kiln, wherein when the incineration rotary kiln operates, the heating temperature in the incineration chamber is 1100-1200 ℃, the incineration chamber operates for 12 minutes under a micro negative pressure state until the waste glass is fully converted into a molten state, at the moment, 55 parts by weight of sodium carbonate is added into molten glass, the incineration rotary kiln is continuously kept in the operating state for 45 minutes, then 15 parts by weight of graphite powder is added into the molten glass, the temperature in the incineration chamber is adjusted to be 800-900 ℃, the micro negative pressure state is unchanged, and after the incineration rotary kiln operates for 120 minutes, a stable porous ceramic body kiln skin is formed on the inner wall of the incineration rotary kiln, and the thickness of the kiln skin is 20-21 cm;
keeping the temperature in the incineration chamber, adding industrial hazardous wastes into the incineration chamber without stopping the incineration chamber for carrying out incineration operation, wherein the incineration operation is continuously carried out without stopping the incineration chamber, and during the incineration period, regularly discharging slag and timely supplementing new industrial hazardous wastes. During the incineration, the temperature on the outer wall of the incineration rotary kiln is detected and recorded:
the initial temperature (the first day) during incineration is 83-101 ℃; the time node when the outer wall temperature is measured to be higher than 160 ℃ for the first time is 55 days, and the specific temperature range is 141-164 ℃; the time node when the outer wall temperature is measured to be more than 180 ℃ for the first time is 60 days, the specific temperature range is 159-181 ℃, and according to experience, kiln skins in the rotary kiln are largely failed and damaged, and the kiln skin hanging operation of the incineration rotary kiln needs to be carried out again.
Claims (7)
1. A porous ceramic body kiln coating in an incineration rotary kiln is characterized in that: the kiln coating comprises glass, carbonate and graphite powder according to components.
2. The porous ceramic body kiln coating in an incineration rotary kiln as recited in claim 1, wherein: the weight ratio of the glass to the carbonate is 1: 0.3 to 0.8.
3. The porous ceramic body kiln coating in an incineration rotary kiln as recited in claim 1, wherein: the weight ratio of the glass to the graphite powder is 1: 0.05 to 0.15.
4. The porous ceramic body kiln coating in an incineration rotary kiln as recited in claim 1, wherein: the carbonate is one or a combination of more of sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, calcium carbonate and calcium bicarbonate.
5. A method of manufacturing a porous ceramic body kiln skin in an incineration rotary kiln according to any one of claims 1 to 4, characterized by: the preparation method comprises the steps of operating the incineration rotary kiln to fully melt waste glass in the incineration rotary kiln, adding carbonate into the melted waste glass, reacting for a period of time, adding graphite powder into the incineration rotary kiln, cooling to a certain extent, and continuing to react for a period of time until viscous glass is solidified into porous ceramic body kiln skin attached to the inner wall of the incineration rotary kiln.
6. The method for preparing a porous ceramic body kiln coating in an incineration rotary kiln as recited in claim 5, wherein: when the waste glass is added, one or a combination of more of quicklime, silicon dioxide, borax and aluminum oxide which are 5-30% of the weight of the waste glass is added at the same time.
7. The method for preparing a porous ceramic body kiln coating in an incineration rotary kiln as recited in claim 5, wherein: the melting temperature of the waste glass in the burning rotary kiln is 1100-1400 ℃.
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275967A (en) * | 1997-09-29 | 2000-12-06 | 沃特克有限公司 | Manufacture of ceramic tiles from industrial waste |
| KR20020042955A (en) * | 2000-12-01 | 2002-06-08 | 이구택 | Device for cooling burnt lime in Rotary-Kiln |
| JP2002173693A (en) * | 2000-12-06 | 2002-06-21 | Daishin Kako Kk | Lubricant for rotary kiln and method for lubricating the same |
| JP2004205164A (en) * | 2002-12-26 | 2004-07-22 | Ngk Insulators Ltd | Non-oxide ceramic sintering kiln and method of manufacturing non-oxide ceramic sintered body |
| CN1697788A (en) * | 2002-10-03 | 2005-11-16 | 佩德罗·法哈多索拉 | Unifired firebrick contg graphite for industry kilns and use of same |
| CN101200377A (en) * | 2006-12-14 | 2008-06-18 | 邓家平 | Process for firing pottery and ceramicite by reducing flame and kiln |
| CN101386480A (en) * | 2008-10-15 | 2009-03-18 | 华南理工大学 | Method for producing portland cement clinker using domestic waste incineration residue |
| CN101921072A (en) * | 2009-06-09 | 2010-12-22 | 宝山钢铁股份有限公司 | Method for removing ring formation of rotary kiln for active lime calcination |
| CN101921129A (en) * | 2010-09-08 | 2010-12-22 | 武汉钢铁(集团)公司 | Paint applied to pelletizing rotary kiln for preventing dust bonding |
| CN104844231A (en) * | 2015-04-29 | 2015-08-19 | 李忠阁 | Accretion-preventing coating of rotary kiln |
| CN105461330A (en) * | 2015-11-19 | 2016-04-06 | 长兴兴鹰新型耐火建材有限公司 | An anti-crust wear-resistant prefabricated brick used for a feeding chamber of a cement kiln |
| CN106699232A (en) * | 2016-12-24 | 2017-05-24 | 安徽芜湖海螺建筑安装工程有限责任公司 | Application method of ceramic nano material for preventing ring formation in rotary cement kiln |
| CN107036437A (en) * | 2017-05-02 | 2017-08-11 | 乐国明 | A kind of rotary kiln turbulent combustion method, kiln head cover and rotary kiln |
| CN108180757A (en) * | 2017-12-14 | 2018-06-19 | 黄骅新智环保技术有限公司 | A kind of dangerous waste enterprise rotary kiln hangs kliner coating and preparation method thereof |
| CN110183099A (en) * | 2019-07-15 | 2019-08-30 | 威海市济合材料工程研究院 | A kind of manufacturing method of expanded porous glass particle |
| CN110372391A (en) * | 2019-08-14 | 2019-10-25 | 中国科学院上海硅酸盐研究所 | A kind of SiC/ graphite composite material and its preparation method and application |
| CN110540416A (en) * | 2019-10-11 | 2019-12-06 | 山东铭特陶瓷材料有限公司 | high-strength and long-service-life stopper rod and preparation method thereof |
| CN111023101A (en) * | 2019-12-27 | 2020-04-17 | 杭州立佳环境服务有限公司 | Method for establishing kiln skin of hazardous waste incineration rotary kiln |
-
2020
- 2020-05-28 CN CN202010466120.6A patent/CN111689779A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275967A (en) * | 1997-09-29 | 2000-12-06 | 沃特克有限公司 | Manufacture of ceramic tiles from industrial waste |
| KR20020042955A (en) * | 2000-12-01 | 2002-06-08 | 이구택 | Device for cooling burnt lime in Rotary-Kiln |
| JP2002173693A (en) * | 2000-12-06 | 2002-06-21 | Daishin Kako Kk | Lubricant for rotary kiln and method for lubricating the same |
| CN1697788A (en) * | 2002-10-03 | 2005-11-16 | 佩德罗·法哈多索拉 | Unifired firebrick contg graphite for industry kilns and use of same |
| JP2004205164A (en) * | 2002-12-26 | 2004-07-22 | Ngk Insulators Ltd | Non-oxide ceramic sintering kiln and method of manufacturing non-oxide ceramic sintered body |
| CN101200377A (en) * | 2006-12-14 | 2008-06-18 | 邓家平 | Process for firing pottery and ceramicite by reducing flame and kiln |
| CN101386480A (en) * | 2008-10-15 | 2009-03-18 | 华南理工大学 | Method for producing portland cement clinker using domestic waste incineration residue |
| CN101921072A (en) * | 2009-06-09 | 2010-12-22 | 宝山钢铁股份有限公司 | Method for removing ring formation of rotary kiln for active lime calcination |
| CN101921129A (en) * | 2010-09-08 | 2010-12-22 | 武汉钢铁(集团)公司 | Paint applied to pelletizing rotary kiln for preventing dust bonding |
| CN104844231A (en) * | 2015-04-29 | 2015-08-19 | 李忠阁 | Accretion-preventing coating of rotary kiln |
| CN105461330A (en) * | 2015-11-19 | 2016-04-06 | 长兴兴鹰新型耐火建材有限公司 | An anti-crust wear-resistant prefabricated brick used for a feeding chamber of a cement kiln |
| CN106699232A (en) * | 2016-12-24 | 2017-05-24 | 安徽芜湖海螺建筑安装工程有限责任公司 | Application method of ceramic nano material for preventing ring formation in rotary cement kiln |
| CN107036437A (en) * | 2017-05-02 | 2017-08-11 | 乐国明 | A kind of rotary kiln turbulent combustion method, kiln head cover and rotary kiln |
| CN108180757A (en) * | 2017-12-14 | 2018-06-19 | 黄骅新智环保技术有限公司 | A kind of dangerous waste enterprise rotary kiln hangs kliner coating and preparation method thereof |
| CN110183099A (en) * | 2019-07-15 | 2019-08-30 | 威海市济合材料工程研究院 | A kind of manufacturing method of expanded porous glass particle |
| CN110372391A (en) * | 2019-08-14 | 2019-10-25 | 中国科学院上海硅酸盐研究所 | A kind of SiC/ graphite composite material and its preparation method and application |
| CN110540416A (en) * | 2019-10-11 | 2019-12-06 | 山东铭特陶瓷材料有限公司 | high-strength and long-service-life stopper rod and preparation method thereof |
| CN111023101A (en) * | 2019-12-27 | 2020-04-17 | 杭州立佳环境服务有限公司 | Method for establishing kiln skin of hazardous waste incineration rotary kiln |
Non-Patent Citations (6)
| Title |
|---|
| "浅析新型高温窑炉保护陶瓷涂料技术及其应用", 《中国建材资讯》 * |
| 施建红等: "浅谈危险废物焚烧回转窑窑皮的建立", 《广东化工》 * |
| 毛玉杰: "危险废物焚烧回转窑耐火砖减薄率的影响因素研究", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》 * |
| 潘裕柏: "《稀土陶瓷材料》", 31 May 2016 * |
| 罗民华: "《多孔陶瓷实用技术》", 31 March 2006 * |
| 许满兴: "《高炉炉料进步与球团矿发展》", 31 May 2019 * |
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