CN101265041B - Technique for using dry discharging carbide slag to completely substitute natural calcareous raw material for producing cement chamotte - Google Patents
Technique for using dry discharging carbide slag to completely substitute natural calcareous raw material for producing cement chamotte Download PDFInfo
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- CN101265041B CN101265041B CN2008100728545A CN200810072854A CN101265041B CN 101265041 B CN101265041 B CN 101265041B CN 2008100728545 A CN2008100728545 A CN 2008100728545A CN 200810072854 A CN200810072854 A CN 200810072854A CN 101265041 B CN101265041 B CN 101265041B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a method for producing cement clinkers from dried carbide slag completely instead of natural limy materials, which relates to the field of building materials. Firstly, three auxiliary materials (including sand rock, coal ash and sulfur acid residue) are compounded, pulverized and sieved, and the fine powder is fed into a dryer. Then, the carbide slag with a water content less than or equal to 12% is fed into the dryer, and undergoes intensive heat exchange with the hot flue gas at the charge side, realizing complete drying and mixture. The crude material powder is fed into first-stage, second-stage and third-stage cyclone cylinders to undergo multiple suspension heat exchange with the hot flue gas, and then enter a rotary kiln for calcination. The hot flue gas inside the klin undergoes the heat exchange in a pipeline calciner and a wind pipe and then reversely flows into the third-stage, second-stage and first-stage third-stage cyclone cylinders, the dryer, a cyclone dust collector, a system fan and an airbox pulse bag-shaped dust collector sequentially, and the purified gas is discharged into the external atmosphere. The coal powder jets into the calciner at the charge side for further combustion, and the crude material powder undergoes decomposition reactions: Ca(OH)2-H2O+CaO. The clinker burned in the rotary kiln is cooled by a grate cooler and then delivered to a clinker storage room. In the invention, the waste carbide slag is completely dried by using the exhaust gas at the discharge side, and the heat consumption for clinker combustion is reduced by about 25%, thereby realizing energy conservation and exhaust reduction.
Description
1, technical field:
Dry discharging carbide slag slag 100% of the present invention substitutes natural stone grey matter raw material for producing cement chamotte processing method and belongs to building materials field.
2, background technology:
Application number is that 200610146907.4 patent of invention " carbide slag 100% substitute natural calcareous raw material kiln decompose outward produce the cement clinker processing method " discloses a kind of to be main raw material with the carbide slag, to adopt kiln to decompose the method for producing cement clinker outward.Its proportioning raw materials is: carbide slag 75.05%, silica 11.84%, slag 8.31%, flyash 4.80%.Because main raw material carbide slag water content≤37%, this method has the following disadvantages:
(1) because wet production acetylene is adopted in the chemical plant, waste residue-carbide slag water content that the acetylene device produces is generally 90%, will pass through earlier
Thickener makes its water content reduce to 70%, then through batching, goes into sheet frame pressure filter extruding, make again its water content reduce to≤37%, can form the raw material filter cake.Whole complex technical process, equipment is many, the failure rate height, operation factor is low.
(2) adopt this kind carbide slag as the main raw material of producing cement clinker, make total system water, electricity, gas consumption increase, raw material per ton increase by 1 ton of water, use gas 34m
3, electricity consumption 8kwh.
(3) owing to go into carbide slag water content≤37% of kiln, need first drying and dewatering, every kilogram of carbide slag increases hear rate 940kj, and total system increases hear rate 25%.
(4) during carbide slag water content 37% left and right sides, physicals in the pasty state, and is mobile poor, though it is easy to have an air storage, do not produce the advantage of airborne dust, has the problem of input and output material difficulty; And dry discharging carbide slag slag water content≤12% o'clock, its particle fineness is thin, and particle diameter accounts for about 80% 0-45um's, and≤80um accounts for 100%, good fluidity.
Because development of technology, the chemical plant can dry production acetylene now, waste residue-carbide slag water content that the acetylene device produces can directly reduce to≤and 12%, this kind carbide slag can directly be discharged with the handling equipment dry method.So utilize the carbide slag of this kind low water content to produce cement clinker, can simplify specific equipment greatly, reduce construction cost, obtain ideal benefits more.
3, summary of the invention:
The object of the present invention is to provide a kind of dry discharging carbide slag slag 100% to substitute natural stone grey matter raw material for producing cement chamotte processing method.
The objective of the invention is to be achieved by the following technical programs:
(1) raw material and the weight percent of production cement clinker are:
Carbide slag 71.8-77.8%, sandstone 8-12%, sulfate slag 1.5-2.5%,
Flyash 11.2-15.2%, wherein carbide slag water content≤12%.
(2) processing method of production cement clinker:
(1) raw grinding:
1. with sandstone, flyash and three kinds of auxiliary materials of sulfate slag after the batching of the automatic batching system at the bottom of the storage vault separately, unload the formula oven dry grinding in the pulverizer of holding concurrently in sending into, the raw material powder behind the grinding draws off in the middle part of this mill and sends in the built-up type powder separating machine.The fine powder of the granularity≤0.08mm that selects through this machine is sent in the moisture eliminator, and the meal of granularity＞0.08mm unloads the formula oven dry pulverizer bistrique storehouse of holding concurrently during the small part meal is sent back to after the material distributing valve sub-material, along with the raw material of the new feeding in each raw material storage bottom of the reservior continues grinding together; Most of meal is delivered to mill tail fine grinding storehouse relaying continued powder mill after the material distributing valve sub-material.Kiln tail waste heat flue gas unloads the double pulverizer of formula oven dry in pipeline is introduced, this flue gas major part enters from bistrique, and small part enters from the mill tail.In unload the formula oven dry waste gas that pulverizer discharges of holding concurrently and deliver to the air box impulse fly-ash separator, the gas after the purifying treatment enters atmosphere.
2. the carbide slag of water content≤12% is transported through rubber conveyer, fed moisture eliminator together through lock wind rotary feeder and the auxiliary material fine powder that entered this blanking device before this.The kiln tail smoke-box of rotary kiln is communicated with in turn with duct type decomposing furnace, airduct, three grades of whirlwind tubes, secondary whirlwind tube, one-level whirlwind tubes, the air outlet tube of three grades of whirlwind tubes is communicated with the cone portion of one-level whirlwind tube, and the top of one-level whirlwind tube is communicated with moisture eliminator by pipeline.Carbide slag and auxiliary material fine powder carry out the intensive heat exchange with hot flue gas from kiln tail one-level whirlwind tube outlet in moisture eliminator, and carry out dry fully and mix; Mixed raw material powder enters cyclone with the air communication piping, and the raw material powder after it is collected is sent in the raw material homogenizing storehouse by chain conveyor, lift, air conveyer flume and stored.The gas that goes out cyclone is delivered to plenum pulse cloth bag collector by system fan, enters atmosphere by system fan, chimney after the purifying treatment.The kiln ash that plenum pulse cloth bag collector is collected stores in chain conveyor, lift, air conveyer flume are sent into the raw material homogenizing storehouse.
(2) grog burns till:
1. the raw material powder after the homogenizing storehouse outbound is delivered to one-level whirlwind tube blast pipe, this blast pipe is communicated with secondary whirlwind tube blast pipe, the raw material powder tangentially enters one-level whirlwind tube in turn with hot flue gas cocurrent flow, with the heat exchange that suspends of hot flue gas, subsequently, the raw material powder that is deposited on this tube bottom is drawn off by weight lock wind flap valve, is communicated with the place through pipeline to the blast pipe of secondary whirlwind tube with the air outlet tube of three grades of whirlwind tubes.Herein, the raw material powder once more with the heat exchange that suspends of hot flue gas, and separated by secondary whirlwind tube, enter three grades of whirlwind tubes through pipeline, enter calcined by rotary kiln through the raw material powder after the heat exchange through this tube bottom pipeline, kiln tail smoke-box.
2. the hot flue gas in the rotary kiln enters three grades of whirlwind tubes after duct type decomposing furnace, airduct heat exchange, adverse current makes progress after the heat exchange once more, enter secondary whirlwind tube through pipeline, enter one-level whirlwind tube through pipeline again, the hot blast that goes out one-level whirlwind tube enters cyclone through pipeline, moisture eliminator, through pipeline, introduce plenum pulse cloth bag collector by system fan again, the gas after the purifying treatment enters atmosphere by system fan, chimney.
3. spray into coal dust firing from kiln tail decomposing furnace bottom, the raw material powder carries out decomposition reaction: Ca (OH)
2→ H
2O+CaO enters three grades of whirlwind tubes subsequently.
4. the grog through calcined by rotary kiln is drawn off by kiln hood, behind the grate cooler forced draft cooling, sends in the grog storage vault.The hot flue gas part of grate cooler is introduced vertical roller grinder oven dry coal dust by pipeline, and another part gathers dust through dust precipitator, and the waste gas after the purification enters atmosphere.
Enforcement of the present invention has solved the problem of environmental pollution that dry discharging carbide slag slag that present domestic PVC industry discharges is difficult to dispose, and makes the depleted carbide slag obtain whole utilizations.The present invention since the carbide slag that adopts water content≤12% as main raw material, adopt the outer decomposition and production process of dry mixed and kiln, so the carbide slag for water content≤12% can all utilize the kiln tail gas oven dry, need not other gain of heat source, accomplished the maximization of Btu utilization, compare with the Wingdale grog, grog per ton can reduce discharging CO
20.52 ton; With application number is that 200610146907.4 patent of invention " carbide slag 100% substitute natural calcareous raw material kiln decompose outward produce the cement clinker processing method " is compared, the hear rate of burning till grog reduces about 25%, simplified specific equipment greatly, technological equipment investment reduces by 10%, the production line floor space saves 5%, reduce construction cost, obtained ideal benefits more.The present invention has embodied the new technology trends of cement industry, meets the energy-saving and emission-reduction that country advocates, the policy of developing a circular economy fully.
4, description of drawings:
Concrete processing method of the present invention is provided by following schema and embodiment:
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is process flow sheet of the present invention (continuing).
Legend: 1, rubber conveyer 2, lock wind rotary feeder 3, moisture eliminator 4, pipeline 5, one-level whirlwind tube 6, secondary whirlwind tube 7, weight lock wind flap valve 8, airduct 9, duct type decomposing furnace 10, coal powder injection mouth 11, high temperature butterfly valve 12, tertiary-air pipe 13, rotary kiln 14, kiln tail smoke-box 15, three grades of whirlwind tubes 16, raw material homogenizing storehouse 17, lift 18, air conveyer flume 19, roots blower 20, solid flowmeter 21, system fan 22, material distributing valve 23, in unload the formula oven dry pulverizer 24 of holding concurrently, plenum pulse cloth bag collector 25, sandstone raw material storage 26, flyash storehouse 27, sulfate slag storehouse 28, constant feeder 29, built-up type powder separating machine 30, chain conveyor 31, dust precipitator 32, chimney 33, cyclone 34, coal dust scale 35, Pulverized Coal Bin 36, vertical roller grinder 37, clinker warehouse 38, chain bucket transfer roller 39, grate cooler 40, the kiln hood cover.
5, embodiment:
Embodiment:
(1) raw material and weight percent are:
Carbide slag 71.8-77.8%, sandstone 8-12%, sulfate slag 1.5-2.5%,
Flyash 11.2-15.2%, wherein carbide slag water content≤12%.
(2) processing method:
(1) raw grinding:
1. with the auxiliary material in sandstone raw material storage 25, flyash storehouse 26 and 27 3 storehouses, sulfate slag storehouse through constant feeder 28 automatic blendings of bottom of the reservior separately, unload the formula oven dry grindings in the pulverizer 23 of holding concurrently in sending into by rubber conveyer 1, lift 17, raw material powder behind the grinding draws off from this mill middle part, sends in the built-up type powder separating machine 29 through foot air conveyer flume 18, lift 17 and topmost air conveyer flume 18.The fine powder of the granularity≤0.08mm that selects is in middle part air conveyer flume 18, lift 17 are sent into lock wind rotary feeder 2; The meal of granularity＞0.08mm is after material distributing valve 22 sub-materials, during being sent back to by middle and lower part air conveyer flume 18, unloads the small part meal the double pulverizer 23 bistrique storehouses of formula oven dry, along with the raw material of the new feeding in each raw material storage bottom of the reservior continues grinding together, most of meal is through delivering to mill tail fine grinding storehouse relaying continued powder mill after by solid flowmeter 20 meterings after material distributing valve 22 sub-materials.Hot flue gas in the kiln tail smoke-box 14 of rotary kiln 13 unloads the double pulverizer 23 of formula oven dry in pipeline 4 is introduced, this flue gas major part enters from bistrique, and small part enters from the mill tail.In unload the formula oven dry waste gas that pulverizer 23 discharges of holding concurrently and deliver to plenum pulse cloth bag collector 24 by pipeline 4, the gas after the purifying treatment enters atmosphere by system fan 21.
2. with the carbide slag of water content≤12% through rubber conveyer 1 transhipment, feed moisture eliminator 3 together through lock wind rotary feeder 2 and the auxiliary material fine powder that entered this blanking device before this.The kiln tail smoke-box 14 of rotary kiln 13 and duct type decomposing furnace 9, airduct 8, three grades of whirlwind tubes 15, secondary whirlwind tube 6, one-level whirlwind tubes 5 are communicated with in turn, the air outlet tube of three grades of whirlwind tubes 15 is communicated with the cone portion of one-level whirlwind tube 5, and the top of one-level whirlwind tube 5 is communicated with moisture eliminator 3 by pipeline 4.Carbide slag and auxiliary material fine powder carry out the intensive heat exchange with hot flue gas from kiln tail one-level whirlwind tube 5 outlet in moisture eliminator 3, and carry out dry fully and mix; Mixed raw material powder enters cyclone 33 with air communication piping 4; Raw material powder after it is collected is sent in the raw material homogenizing storehouse 16 by chain conveyor 30, lift 17, air conveyer flume 18 and is stored.The gas that goes out cyclone 33 is delivered to plenum pulse cloth bag collector 31 by system fan 21, enters atmosphere by system fan 21, chimney 32 after the purifying treatment.The kiln ash that plenum pulse cloth bag collector 31 is collected is sent in the raw material homogenizing storehouse 16 through chain conveyor 30, lift 17 air conveyer flumes 18 and is stored.
(2) grog burns till:
1. the raw material powder in the raw material homogenizing storehouse 16 by solid flowmeter 20 meterings after air conveyer flume 18, lift 17 deliver on one-level whirlwind tube 5 and the pipeline 4 that secondary whirlwind tube 6 is communicated with, when entering in the one-level whirlwind tube 5 because of the hot flue gas from kiln tail smoke-box 14 is tangential direction, flow velocity is bigger, promptly tangentially enter one-level whirlwind tube 5 in turn so enter the raw material powder of one-level whirlwind tube 5 with the flue gas cocurrent flow, for the helical movement in this tube, and carry out sufficient heat exchange with hot flue gas.Owing to be subjected to action of centrifugal force, the raw material powder separates with hot flue gas, is deposited on one-level whirlwind tube 5 bottoms, and in this of short duration dispersion and accumulation process, the raw material powder has been heated to the temperature that approaches secondary whirlwind tube 6 outlet pipe place hot gas flows.The raw material powder is drawn off by one-level whirlwind tube 5 bottom weights lock wind flap valves 7 subsequently, is communicated with the place through pipeline 4 to the blast pipe of secondary whirlwind tube 6 with the air outlet tube of three grades of whirlwind tubes 15.Herein, the raw material powder once more with the heat exchange that suspends of hot flue gas, and separated by secondary whirlwind tube 6, enter three grades of whirlwind tubes 15 through pipeline 4, enter rotary kiln 13 calcinings through the raw material powder after the heat exchange through this tube bottom pipeline 4, kiln tail smoke-box 14.
2. the hot flue gas in the rotary kiln 13 enters three grades of whirlwind tubes 15 after duct type decomposing furnace 9, airduct 8 heat exchange, adverse current makes progress after the heat exchange once more, enter secondary whirlwind tube 6 through pipeline 4, enter one-level whirlwind tube 5 through pipeline 4 again, the hot blast that goes out one-level whirlwind tube 5 enters cyclone 33 through pipeline 4, moisture eliminator 3, through pipeline 4, introduce plenum pulse cloth bag collector 31 by system fan 21 again, the gas after the purifying treatment enters atmosphere by system fan 21, chimney 32.
3. by roots blower 19 coal dust is sprayed into from duct type decomposing furnace 9 bottom coal powder injection mouths 10, in burning, because vortex motion causes sizable velocity contrast, promote short mix and heat exchange between hot gas flow and the raw material powder, and then make formation flameless combustion in the duct type decomposing furnace 9.The raw material powder carries out following decomposition reaction: Ca (OH) in moving downward
2→ H
2O+CaO makes Ca in the raw material powder (OH)
2Rate of decomposition reach 85～90% and enter three grades of whirlwind tubes 15.
4. the hot flue gas of kiln hood cover 40 is introduced duct type decomposing furnace 9 through tertiary-air pipe 12, high temperature butterfly valve 11 is set with the control air quantity on the tertiary-air pipe 12.
5. draw off by kiln hood through rotary kiln 13 incinerating grogs, behind grate cooler 39 forced draft cooling, send in the grog storage vault 37 by chain bucket transfer roller 38.The hot flue gas part of grate cooler 39 is introduced vertical roller grinder 36 with the oven dry coal dust by pipeline 4, and another part gathers dust through plenum pulse cloth bag collector 31, and the waste gas after the purification enters atmosphere through system fan 21, chimney 32.
Claims (1)
1. a dry discharging carbide slag slag 100% substitutes natural stone grey matter raw material for producing cement chamotte processing method, it is characterized in that: press following raw material and weight percent:
Carbide slag 71.8-77.8%, sandstone 8-12%, sulfate slag 1.5-2.5%, flyash 11.2-15.2%, carbide slag water content≤12% wherein,
Press following step production:
(1) raw grinding: 1. with sandstone, flyash and three kinds of auxiliary materials of sulfate slag after the batching of the automatic batching system at the bottom of the storage vault separately, unload grinding in the double pulverizer of formula oven dry in sending into, raw material powder behind the grinding draws off from this mill middle part and sends in the built-up type powder separating machine, the fine powder of the granularity≤0.08mm that selects through this machine is sent in the moisture eliminator, the meal of granularity＞0.08mm is after the material distributing valve sub-material, during sending back to, unloads the small part meal the double pulverizer bistrique storehouse of formula oven dry, along with the new raw material that feeds in each raw material storage bottom of the reservior continues grinding together; Most of meal is delivered to mill tail fine grinding storehouse relaying continued powder mill after the material distributing valve sub-material, kiln tail waste heat flue gas unloads the double pulverizer of formula oven dry in pipeline is introduced, this flue gas major part enters from bistrique, small part enters from the mill tail, in unload the formula oven dry waste gas that pulverizer discharges of holding concurrently and deliver to the air box impulse fly-ash separator, the gas after the purifying treatment enters atmosphere;
2. the carbide slag of water content≤12% is transported through rubber conveyer, feed moisture eliminator together through lock wind rotary feeder and the auxiliary material fine powder that entered this blanking device before this, the kiln tail smoke-box of rotary kiln and duct type decomposing furnace, airduct, three grades of whirlwind tubes, secondary whirlwind tube, one-level whirlwind tube is communicated with in turn, the air outlet tube of three grades of whirlwind tubes is communicated with the cone portion of one-level whirlwind tube, the top of one-level whirlwind tube is communicated with moisture eliminator by pipeline, carbide slag and auxiliary material fine powder carry out the intensive heat exchange with hot flue gas from kiln tail one-level whirlwind tube outlet in moisture eliminator, and carry out dry fully and mix; Mixed raw material powder enters cyclone with the air communication piping, raw material powder after it is collected is sent in the raw material homogenizing storehouse by chain conveyor, lift, air conveyer flume and is stored, the gas that goes out cyclone is delivered to plenum pulse cloth bag collector by system fan, entered greatly by system fan, chimney after the purifying treatment, the kiln ash that plenum pulse cloth bag collector is collected stores in chain conveyor, lift, air conveyer flume are sent into the raw material homogenizing storehouse;
(2) grog burns till: 1. the raw material powder after the homogenizing storehouse outbound is delivered to one-level whirlwind tube blast pipe, this blast pipe is communicated with secondary whirlwind tube blast pipe, the raw material powder tangentially enters one-level whirlwind tube in turn with hot flue gas cocurrent flow, with the heat exchange that suspends of hot flue gas, subsequently, the raw material powder that is deposited on this tube bottom is drawn off by weight lock wind flap valve, be communicated with the place through pipeline to the blast pipe of secondary whirlwind tube with the air outlet tube of three grades of whirlwind tubes, herein, the raw material powder once more with the heat exchange that suspends of hot flue gas, and separated by secondary whirlwind tube, enter three grades of whirlwind tubes through pipeline, through the raw material powder after the heat exchange through this tube bottom pipeline, kiln tail smoke-box enters calcined by rotary kiln;
2. the hot flue gas in the rotary kiln enters three grades of whirlwind tubes after duct type decomposing furnace, airduct heat exchange, adverse current makes progress after the heat exchange once more, enter secondary whirlwind tube through pipeline, enter one-level whirlwind tube through pipeline again, the hot blast that goes out one-level whirlwind tube enters cyclone through pipeline, moisture eliminator, through pipeline, introduce plenum pulse cloth bag collector by system fan again, the gas after the purifying treatment enters atmosphere by system fan, chimney;
3. spray into coal dust firing from kiln tail decomposing furnace bottom, the raw material powder carries out decomposition reaction: Ca (OH)
2→ H
2O+CaO enters three grades of whirlwind tubes subsequently;
4. the grog through calcined by rotary kiln is drawn off by kiln hood, behind the grate cooler forced draft cooling, to send in the grog storage vault, the hot flue gas part of grate cooler is introduced vertical roller grinder oven dry coal dust by pipeline, another part gathers dust through dust precipitator, and the waste gas after the purification enters atmosphere.
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| CN102173608A (en) * | 2011-01-31 | 2011-09-07 | 新疆凯盛建材设计研究院（有限公司） | Method for preparing cement clinker from high-proportion carbide slag through decomposition outside kiln of five-stage preheater |
| CN102229475B (en) * | 2011-04-18 | 2012-11-28 | 唐本法 | Control system and method for cement ingredients |
| CN105110666B (en) * | 2015-07-31 | 2017-11-17 | 武汉理工大学 | The method that the discarded object produced using calcium carbide prepares clinker |
| CN107200486A (en) * | 2017-07-11 | 2017-09-26 | 陕西北元化工集团股份有限公司 | A kind of highly doped industrial residue cement and preparation method thereof |
| CN109631605A (en) * | 2019-01-04 | 2019-04-16 | 贵州芭田生态工程有限公司 | A kind of smoke heat energy recovery method of phosphorus ore calcination rotary kiln |
| CN112316715B (en) * | 2020-10-15 | 2021-07-20 | 成都建筑材料工业设计研究院有限公司 | High-temperature dust collection and cooling system and method for cement kiln SCR denitration system |
| CN113019648B (en) * | 2021-03-02 | 2024-04-30 | 合肥水泥研究设计院有限公司 | High-efficient preparation system of abandonment concrete regeneration sand powder |
| CN113788491A (en) * | 2021-10-15 | 2021-12-14 | 江苏中圣园科技股份有限公司 | Equipment and process for producing active calcium oxide by suspension calcination of white mud |
| CN115773659B (en) * | 2022-11-16 | 2023-05-05 | 淮南东辰固废利用有限公司 | Calcining kiln for small-particle-size gangue ceramsite |
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Effective date of registration: 20101027 Address after: 830000 No. 12 West Rainbow Road, the Xinjiang Uygur Autonomous Region, Urumqi Patentee after: Xinjiang Kasen building materials design & Research Institute (Co., Ltd.) Address before: 830000 No. 12 West Rainbow Road, the Xinjiang Uygur Autonomous Region, Urumqi Patentee before: Xinjiang Building Materials Designing Institute |