CN111204788A - Process and system for preparing high-strength blocky active lime from carbide slag - Google Patents
Process and system for preparing high-strength blocky active lime from carbide slag Download PDFInfo
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- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
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- C01F11/02—Oxides or hydroxides
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Abstract
The invention discloses a process and a system for preparing high-strength blocky active lime from carbide slag, wherein the process comprises the following steps: (1) the carbide slag is crushed in a drying crusher and dried by high-temperature dry gas, and then enters a multi-stage preheater, the high-temperature dry gas comes from a gas burning furnace and a cyclone separator, the multi-stage preheater takes the high-temperature gas from the gas burning furnace and the cyclone separator as a heat source, and the gas burning furnace generates the high-temperature gas by burning the carbide furnace gas to provide heat; (2) the carbide slag preheated by the multi-stage preheater and high-temperature gas enter a decomposing furnace together for calcination and decomposition, the decomposing furnace is filled with air, and the heat source is the carbide furnace gas from a carbide furnace gas pipeline and the heat generated after combustion; (3) calcium oxide obtained by calcination and decomposition is collected by a cyclone separator, and enters a finished product ash bin after impurity removal, and is pressed into blocky active lime and then enters a finished product bin; and the high-temperature gas after calcination and decomposition enters the drying crusher and the multi-stage preheater again through the cyclone separator.
Description
Technical Field
The invention relates to the technical field of industrial waste recycling, in particular to a process and a system for preparing high-strength blocky active lime from carbide slag.
Background
In 2016, the domestic calcium carbide production capacity is 4500 ten thousand tons per year, the yield is 2730 ten thousand tons per year (the national calcium carbide industry association counts 220 household calcium carbide enterprises), the domestic consumption is 2716 ten thousand tons per year, the export is 14 ten thousand tons per year, and about 3260 ten thousand tons per year is generated according to 1.2t calcium carbide slag generated by 1t calcium carbide consumption. The waste carbide slag not only occupies valuable land resources, but also causes pollution to nearby soil and water bodies. Therefore, the treatment of the carbide slag is an important work for solving the environmental pollution and the survival of enterprises. At present, the utilization and research of the carbide slag generally carry out simple treatment on the carbide slag or directly use the carbide slag without any treatment, for example, the carbide slag is used as cement and a material for building roads, is greatly influenced by market demands, and restricts the development of carbide enterprises.
The process for preparing the high-strength blocky active lime aiming at the carbide slag is still in the beginning stage at present. Patent specification CN 106927699 a discloses a method for preparing lime for calcium carbide by using carbide slag, which adopts a lime kiln for calcination, and has high energy consumption and low efficiency compared with multi-stage preheating decomposition; the method also adopts a wet screening mode to remove impurities, so that a large amount of wastewater is generated, and the wastewater treatment is needed in the later stage, so that the investment and the operation cost are increased.
Patent specification CN 109467322A discloses a production process for preparing quick lime from carbide slag, which comprises removing impurities from carbide slag by air separation or vibration screening, calcining at high temperature, and pressing to obtain quick lime.
Patent specification CN 108423683A discloses a method for producing calcium carbide raw material lime balls by using dry acetylene carbide slag, which comprises the steps of removing impurities by winnowing, dehydrating and drying, spraying waste tar solution, calcining at high temperature by using water gas as fuel, and pressing balls to obtain the lime balls.
The technical scheme of the patent has high investment and operation cost, and limits the application of the technical scheme in actual production.
Disclosure of Invention
Aiming at the defects in the field, the invention provides a process for preparing high-strength blocky active lime from carbide slag.
A process for preparing high-strength blocky active lime from carbide slag comprises the following steps:
(1) the method comprises the following steps that carbide slag is crushed in a drying crusher and dried by high-temperature dry gas, and then the carbide slag enters a multi-stage preheater, wherein the high-temperature dry gas comes from a gas burning furnace and a cyclone separator, the multi-stage preheater adopts the high-temperature gas from the gas burning furnace and the cyclone separator as a heat source, and the gas burning furnace provides heat through the high-temperature gas generated after carbide furnace gas is burned;
(2) the carbide slag preheated by the multi-stage preheater and high-temperature gas enter a decomposing furnace together for calcination and decomposition, air is introduced into the decomposing furnace, and the heat source is the carbide furnace gas from the carbide furnace gas pipeline and the heat generated after combustion;
(3) calcium oxide obtained by calcination and decomposition is collected by the cyclone separator, and enters a finished product ash bin after impurity removal; the high-temperature gas after calcination and decomposition reenters the drying crusher and the multi-stage preheater through the cyclone separator;
(4) and pressing the calcium oxide in the finished product ash bin into blocky active lime, and then entering a finished product warehouse.
All heat sources in the process are from calcium carbide furnace gas which is a byproduct of acetylene preparation from calcium carbide. The calcium carbide furnace gas in the calcium carbide furnace gas pipeline comprises CO and H2、CH4The heat value is 11290-17915 KJ/m3The temperature is 400-800 ℃. The calcium carbide furnace gas contains a large amount of combustible gas and has higher temperature, so the calcium carbide furnace gas can spontaneously combust when meeting air or oxygen, an ignition system is not needed to be equipped, and only a simple gas combustion furnace is needed to be equipped, so that the investment and the operation cost can be reduced, and a large amount of land resources can be saved;in addition, for the calcium carbide plant, external energy sources are not needed.
Secondly, the drying crusher adopted by the invention is characterized in that the carbide slag passes through the drying crusher from top to bottom, the carbide slag is only required to be sent into a material inlet at the top by a hoister, the power of the fan is small, and the operation energy consumption of the whole device is only about 35 percent of that of other conventional dryers.
And thirdly, in the conventional technology, a rotary kiln is used as calcining equipment in the calcining part, coal powder is used as fuel in the rotary kiln, the coal powder is required to be sprayed into a hearth in the operation process, the residual coal ash after combustion can be mixed with calcium oxide generated after acetylene sludge is calcined, the purity of the calcium oxide is reduced, the product quality is influenced, and the impurity removal cost is increased due to the fact that the purity of the acetylene sludge generated after acetylene gas is produced again, and even the acetylene sludge cannot be utilized. The invention adopts the combination of the multi-stage preheater and the decomposing furnace, uses the calcium carbide furnace gas as the fuel, does not generate solid-phase by-products after combustion, has higher purity of finished calcium oxide, is combined with the calcium carbide production process, can repeatedly and circularly utilize the calcium oxide without purchasing, and is calcined after multi-stage preheating, so the energy consumption of the process is better than that of a rotary kiln.
Preferably, the attached water content of the carbide slag at a material inlet of the drying crusher is 5-35%, and the attached water content at a material outlet is lower than 1%. If the water content attached to the carbide slag at the material inlet of the drying crusher exceeds 35 percent, the plate-and-frame filter press can be used for preliminarily removing water from the carbide slag. The attached water content of the carbide slag at the bottom material outlet of the drying crusher is lower than 1%, and the carbide slag material entering the multi-stage preheater is guaranteed to be basically dry, so that the energy consumption of the multi-stage preheater part can be reduced, and the stable operation of the multi-stage preheater and the decomposing furnace can be guaranteed.
Preferably, the temperature of the high-temperature drying gas is controlled to be 280-500 ℃ when the high-temperature drying gas enters the drying crusher. The high-temperature drying gas consists of two parts, wherein one part is the high-temperature gas discharged by the cyclone separator, and the other part is the high-temperature gas generated by the combustion of calcium carbide furnace gas.
Preferably, the temperature of the material at the outlet of the multi-stage preheater is controlled to be 400-800 ℃. The heat source of the multi-stage preheater consists of two parts, wherein one part is high-temperature gas discharged by the cyclone separator, and the other part is high-temperature gas generated by combustion of calcium carbide furnace gas.
Preferably, the temperature of the decomposing furnace is controlled to be 650-1000 ℃. The heat source of the decomposing furnace is provided by high-temperature gas generated by combustion of calcium carbide furnace gas.
The invention also provides the high-strength blocky active lime prepared by the process, wherein the purity of the high-strength blocky active lime is more than or equal to 90 percent, and the compression resistance is more than or equal to 6 MPa.
The invention also provides a system for preparing high-strength blocky active lime from carbide slag, and by adopting the process, the system for preparing high-strength blocky active lime from carbide slag comprises the following steps:
the carbide slag conveying mechanism is used for conveying the carbide slag to the drying crusher;
the drying crusher comprises a material gas box body, a crushing cavity body and a discharging box body which are sequentially connected from top to bottom, wherein a hammer type crushing device used for scattering the carbide slag is arranged in the crushing cavity body, an air inlet communicated with an air outlet of a cyclone separator and an air combustion furnace is arranged at the bottom of the discharging box body, the carbide slag passes through the drying crusher from top to bottom, and high-temperature dry air from the cyclone separator and the air combustion furnace passes through the drying crusher from bottom to top;
the multi-stage preheater is used for receiving and preheating the dried carbide slag and high-temperature drying gas, and is provided with a heat source inlet communicated with the gas outlet of the cyclone separator and the gas combustion furnace and a material outlet connected with the decomposing furnace;
the decomposing furnace is used for calcining and decomposing the preheated carbide slag, is connected with an air source and is also provided with a gas inlet communicated with the carbide furnace gas pipeline and a material outlet connected with the cyclone separator;
the cyclone separator is used for separating calcium oxide and high-temperature gas obtained by calcination and decomposition, a solid material outlet is arranged at the bottom of the cyclone separator, and an exhaust port connected with the drying crusher and the multi-stage preheater is arranged at the top of the cyclone separator;
the gas burning furnace is used for burning calcium carbide furnace gas and providing heat for the drying crusher and the multi-stage preheater, is connected with an air source, is provided with a gas inlet communicated with the calcium carbide furnace gas pipeline, and is also provided with a high-temperature gas outlet connected with the drying crusher and the multi-stage preheater;
the rotary vibration sieve is arranged below the solid material outlet of the cyclone separator and is used for removing impurities;
the finished product ash bin is used for storing the calcium oxide after impurity removal;
the ball press machine is used for pressing the calcium oxide stored in the finished product ash bin;
and the finished product warehouse is used for storing the massive active lime obtained by pressing.
The hammer type crushing device can break up the carbide slag passing through the crushing cavity from top to bottom, and the contact area of the carbide slag and high-temperature gas is increased, so that further drying is facilitated.
The multi-stage preheater can be provided with 2-5 stages of preheating devices.
Preferably, carbide slag conveying mechanism bury formula hopper, belt conveyor and lifting machine including what set gradually takes the measurement function.
Further preferably, the buried hopper with the metering function is positioned above the belt conveyor, and the bottom of the buried hopper with the metering function is provided with an electric control valve, so that the feeding speed can be controlled by controlling the opening degree of the valve.
Preferably, the system for preparing high-strength blocky active lime from carbide slag further comprises a dust remover connected with a gas outlet of the drying crusher and used for removing dust from high-temperature dry gas after the carbide slag is contacted, and dust obtained by dust removal enters the multistage preheater together with the dried carbide slag through a dust outlet at the bottom of the dust remover.
Further preferably, the top of the dust remover is provided with a gas outlet communicated with the flue for discharging the dust-removed gas.
The rotary vibration sieve can be provided with a single-layer or multi-layer sieve mesh, such as 1-3 layers of sieve meshes, and the mesh number of the upper part of the sieve mesh is smaller than that of the lower part of the sieve mesh.
Preferably, the screen mesh number of the rotary vibration screen is 30-300 meshes.
Preferably, the ball making pressure of the ball press is more than or equal to 6MPa, and the maximum ball making pressure can reach 30 MPa.
Compared with the prior art, the invention has the main advantages that:
1. the calcium carbide furnace gas is used as energy, so that external energy sources are not needed, an ignition system is not needed, and only a simple gas burning furnace is needed, so that the investment and operation cost are reduced, and the land resources are saved.
2. And a drying crusher is adopted as a drying device, so that the investment cost and the operating cost are low.
3. The calcining combination of the multi-stage preheater and the decomposing furnace is adopted, high-temperature flue gas is recycled, the energy consumption is low, no by-product is mixed into calcium oxide, the purity and the activity of the finished calcium oxide are high, the process is combined with a calcium carbide generation process, the calcium oxide can be recycled, and outsourcing is not needed.
4. And a dry screening mode after calcination is adopted, so that the screening efficiency is higher, and no secondary pollutant is generated.
Drawings
FIG. 1 is a schematic view of the process flow of preparing high-strength massive active lime from carbide slag of the example;
in the figure: the device comprises a carbide slag storage yard 1, a buried hopper 2, a belt conveyor 3, a hoister 4, a drying crusher 5, a small bin 6, a multistage preheater 7, a decomposing furnace 8, a cyclone separator 9, a dust remover 10, a flue 11, waste heat 12, a gas burning furnace 13, a calcium carbide furnace gas pipeline 14, an air source 15, a rotary vibrating screen 16, a finished product ash bin 17, a ball press machine 18, a finished product warehouse 19 and an impurity storage yard 20.
Detailed Description
The invention is further described with reference to the following drawings and specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.
As shown in fig. 1, the system for preparing high-strength massive active lime from carbide slag according to the embodiment includes a buried hopper 2, a belt conveyor 3, a hoist 4, a drying crusher 5, a small bin 6, a multistage preheater 7, a decomposing furnace 8, a cyclone separator 9, a dust remover 10, a flue 11, a gas combustion furnace 13, a calcium carbide furnace gas pipeline 14, a rotary vibrating screen 16, a finished product ash bin 17, and a ball press 18.
The buried hopper 2 receives the carbide slag from the carbide slag storage yard 1, the buried hopper has a metering function, and the bottom of the buried hopper is provided with an electric control valve which can control the feeding speed; the material outlet at the bottom of the buried hopper 2 is positioned above the belt conveyor 3, and the belt conveyor 3 and the elevator 4 are connected through a belt. The buried hopper 2, the belt conveyor 3 and the elevator 4 form a carbide slag conveying mechanism for conveying carbide slag to the drying crusher 5.
The drying crusher 5 is divided into a material gas box body, a crushing cavity body and a discharging box body from top to bottom. The top of the material gas tank body is provided with a carbide slag inlet, a hammer type crushing device is arranged in the crushing cavity, and the bottom of the discharging tank body is provided with a discharging port and is connected with the small bin 6 through a pipeline. The bottom of the discharging box body is provided with two gas inlets which are respectively connected with the cyclone separator 9 and the gas burning furnace 13 through pipelines, and the gas burning furnace 13 is provided with two gas inlets which are respectively connected with the calcium carbide furnace gas pipeline 14 and the air source 15 through pipelines. The top of the feed gas box body is provided with a gas outlet which is connected with the dust remover 10 through a pipeline. The top of the dust remover 10 is provided with a gas outlet which is connected with a flue 11 through a pipeline, and the bottom of the dust remover is provided with a dust outlet which is connected with the small bin 6.
The star-type feeder is arranged at the bottom of the small bin 6 to control the feeding speed, and is connected with the multi-stage preheater 7 through a pipeline, the multi-stage preheater 7 can be arranged at 2-5 levels, two gas inlets are arranged at the bottom of the small bin and are respectively connected with the cyclone separator 9 and the gas combustion furnace 13 through pipelines, and the top of the small bin is communicated with the decomposing furnace 8. The decomposing furnace 8 is provided with two gas inlets which are respectively connected with a calcium carbide furnace gas pipeline 14 and an air source 15 through pipelines, and the top of the decomposing furnace is provided with an outlet which is connected with the cyclone separator 9 through a pipeline.
The bottom of the cyclone separator 9 is provided with a solid material outlet which is positioned above the rotary vibration sieve 16, the rotary vibration sieve 16 can be provided with 1-3 layers, the mesh number of the sieve can be 30-300 meshes, and the mesh number of the upper part of the sieve is smaller than that of the lower part of the sieve.
The ball forming pressure of the ball press machine 18 is 6-30 MPa.
The main components of the calcium carbide furnace gas in the calcium carbide furnace gas pipeline 14 are CO and H2、CH4The balance being a small amount of CO2、N2And very small amounts of O2And the like.
The process flow for preparing the high-strength blocky active lime by the carbide slag comprises the following steps:
the method comprises the following steps that the carbide slag of a carbide slag storage yard 1 is added into a buried hopper 2 through mechanical equipment, the buried hopper 2 controls the blanking speed of the carbide slag, and the carbide slag is sent to a material inlet at the top of a drying crusher 5 through a belt conveyor 3 and a lifter 4 after falling onto the belt conveyor 3; the carbide slag passes through the drying crusher 5 from top to bottom, high-temperature drying gas from the cyclone separator 9 and the gas combustion furnace 13 passes through the drying crusher from bottom to top, and the carbide slag is dried after being contacted with the high-temperature drying gas in the drying crusher 5; when the carbide slag passes through the crushing cavity of the drying crusher 5, the carbide slag is broken up by the hammer type crushing device in the crushing cavity, so that the contact area of the carbide slag and the high-temperature dry gas is increased; the inlet temperature of the high-temperature gas is controlled to be 280-500 ℃, and the attached water content of the carbide slag at the material outlet can be ensured to be lower than 1% by adjusting the temperature of the high-temperature gas at the inlet; the high-temperature gas enters the flue 11 to be discharged after being dedusted by the deduster 10, and the dust enters the small bin 6 along with the dried carbide slag.
The dried carbide slag can be temporarily stored in a small bin 6, the small bin 6 sends the carbide slag into a multi-stage preheater 7 through a star-shaped feeder, the outlet temperature of the multi-stage preheater 7 is controlled to be 400-800 ℃, and heat sources of the multi-stage preheater 7 are from a cyclone separator 9 and a gas combustion furnace 13; the gas burning furnace 13 provides heat through high-temperature gas generated after the calcium carbide furnace gas in the calcium carbide furnace gas pipeline 14 is burned.
After being preheated in multiple stages, the carbide slag and high-temperature gas enter a decomposing furnace 8 together for calcination and decomposition, the temperature of the decomposing furnace is controlled to be 650-1000 ℃, and a heat source of the carbide slag comes from a carbide furnace gas pipeline 14; the decomposed calcium oxide is collected by a cyclone separator 9, and the high-temperature gas enters the drying crusher 5 and the multi-stage preheater 7 again; the collected calcium oxide powder is sieved by a rotary vibrating screen 16 and then enters a finished product ash bin 17, and impurities are sent to an impurity storage yard 20; the calcium oxide powder is pressed into balls by a ball press machine 18 and then enters a finished product warehouse 19, and the purity of the obtained high-strength blocky active lime is more than or equal to 90 percent, and the compression resistance is more than or equal to 6 MPa.
Application example 1
The process and the system for preparing the high-strength blocky active lime by using the carbide slag in the production line of 10 ten thousand tons of quick lime pellets produced in a certain calcium carbide plant per year adopt the embodiment, the attached water content of the carbide slag in a storage yard is 19.6 percent, the purity of the blocky active lime is 90.4 percent, and the compressive strength is 6.5 MPa.
The temperature of a gas inlet of the drying crusher is controlled to be about 400 ℃, and the temperature of a gas outlet is controlled to be about 70 ℃; the multistage preheater is set to be 3 stages, the preheating temperature of the first stage is 450 ℃, the preheating temperature of the second stage is 550 ℃, the preheating temperature of the third stage is 650 ℃, and the calcining temperature of the decomposing furnace is controlled to be 850 ℃; the rotary vibration sieve is provided with 1 layer, and the sieve mesh is selected to be 100 meshes.
Application example 2
The process and the system for preparing the high-strength blocky active lime by using the carbide slag in the embodiment are adopted in the production line of 8 ten thousand tons of quick lime pellets produced in a certain calcium carbide plant every year, the attached water content of the carbide slag in a storage yard is 16.7 percent, the purity of the high-strength blocky active lime is 91.6 percent, and the compressive strength is 6.8 MPa.
The temperature of a gas inlet of the drying crusher is controlled to be about 370 ℃, and the temperature of a gas outlet is controlled to be about 70 ℃; the multistage preheater is set to be 3 stages, the preheating temperature of the first stage is 400 ℃, the preheating temperature of the second stage is 500 ℃, the preheating temperature of the third stage is 600 ℃, and the calcining temperature of the decomposing furnace is controlled to be 800 ℃; the rotary vibration sieve is provided with 2 layers, the upper layer sieve is 60 meshes, and the lower layer sieve is 120 meshes.
Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the above description of the present invention, and equivalents also fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. A process for preparing high-strength blocky active lime from carbide slag is characterized by comprising the following steps:
(1) the method comprises the following steps that carbide slag is crushed in a drying crusher and dried by high-temperature dry gas, and then the carbide slag enters a multi-stage preheater, wherein the high-temperature dry gas comes from a gas burning furnace and a cyclone separator, the multi-stage preheater adopts the high-temperature gas from the gas burning furnace and the cyclone separator as a heat source, and the gas burning furnace provides heat through the high-temperature gas generated after carbide furnace gas is burned;
(2) the carbide slag preheated by the multi-stage preheater and high-temperature gas enter a decomposing furnace together for calcination and decomposition, air is introduced into the decomposing furnace, and the heat source is the carbide furnace gas from the carbide furnace gas pipeline and the heat generated after combustion;
(3) calcium oxide obtained by calcination and decomposition is collected by the cyclone separator, and enters a finished product ash bin after impurity removal; the high-temperature gas after calcination and decomposition reenters the drying crusher and the multi-stage preheater through the cyclone separator;
(4) and pressing the calcium oxide in the finished product ash bin into blocky active lime, and then entering a finished product warehouse.
2. The process for preparing high-strength blocky active lime from carbide slag according to claim 1, wherein the composition of the carbide furnace gas in the carbide furnace gas pipeline comprises CO and H2、CH4The heat value is 11290-17915 KJ/m3The temperature is 400-800 ℃.
3. The process for preparing high-strength blocky active lime from carbide slag according to claim 1, wherein the carbide slag has an attached water content of 5-35% at a material inlet of a drying crusher and less than 1% at a material outlet.
4. The process for preparing high-strength blocky active lime from carbide slag according to claim 1, wherein the temperature of the high-temperature drying gas is controlled to be 280-500 ℃ when the high-temperature drying gas enters the drying crusher.
5. The process for preparing high-strength blocky active lime from carbide slag according to claim 1, wherein the temperature of the material at the outlet of the multi-stage preheater is controlled to be 400-800 ℃.
6. The process for preparing high-strength blocky active lime from carbide slag according to claim 1, wherein the temperature of the decomposing furnace is controlled to be 650-1000 ℃.
7. The high-strength blocky active lime prepared by the process according to any one of claims 1 to 6, wherein the purity of the high-strength blocky active lime is not less than 90%, and the compression resistance is not less than 6 MPa.
8. The system for preparing the high-strength blocky active lime from the carbide slag is characterized by comprising the following steps of:
the carbide slag conveying mechanism is used for conveying the carbide slag to the drying crusher;
the drying crusher comprises a material gas box body, a crushing cavity body and a discharging box body which are sequentially connected from top to bottom, wherein a hammer type crushing device used for scattering the carbide slag is arranged in the crushing cavity body, an air inlet communicated with an air outlet of a cyclone separator and an air combustion furnace is arranged at the bottom of the discharging box body, the carbide slag passes through the drying crusher from top to bottom, and high-temperature dry air from the cyclone separator and the air combustion furnace passes through the drying crusher from bottom to top;
the multi-stage preheater is used for receiving and preheating the dried carbide slag and high-temperature drying gas, and is provided with a heat source inlet communicated with the gas outlet of the cyclone separator and the gas combustion furnace and a material outlet connected with the decomposing furnace;
the decomposing furnace is used for calcining and decomposing the preheated carbide slag, is connected with an air source and is also provided with a gas inlet communicated with the carbide furnace gas pipeline and a material outlet connected with the cyclone separator;
the cyclone separator is used for separating calcium oxide and high-temperature gas obtained by calcination and decomposition, a solid material outlet is arranged at the bottom of the cyclone separator, and an exhaust port connected with the drying crusher and the multi-stage preheater is arranged at the top of the cyclone separator;
the gas burning furnace is used for burning calcium carbide furnace gas and providing heat for the drying crusher and the multi-stage preheater, is connected with an air source, is provided with a gas inlet communicated with the calcium carbide furnace gas pipeline, and is also provided with a high-temperature gas outlet connected with the drying crusher and the multi-stage preheater;
the rotary vibration sieve is arranged below the solid material outlet of the cyclone separator and is used for removing impurities;
the finished product ash bin is used for storing the calcium oxide after impurity removal;
the ball press machine is used for pressing the calcium oxide stored in the finished product ash bin;
and the finished product warehouse is used for storing the massive active lime obtained by pressing.
9. The system for preparing high-strength blocky active lime from carbide slag according to claim 8, further comprising a dust remover connected with a gas outlet of the drying crusher and used for removing dust from the high-temperature dry gas after contacting with the carbide slag, wherein dust obtained by dust removal enters the multi-stage preheater together with the dried carbide slag through a dust outlet at the bottom of the dust remover.
10. The system for preparing high-strength blocky active lime from carbide slag according to claim 8, wherein the mesh number of the rotary vibration sieve is 30-300 meshes.
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| CN111498885A (en) * | 2020-06-15 | 2020-08-07 | 江苏莱蒙新型钙业发展有限公司 | Method for producing active calcium oxide by using carbide slag |
| CN111717916A (en) * | 2020-06-03 | 2020-09-29 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing calcium carbide raw material active calcium oxide by using wet-process calcium carbide slag |
| CN113087002A (en) * | 2021-04-02 | 2021-07-09 | 沈阳东大东科干燥煅烧工程技术有限公司 | Method and system for preparing calcium oxide balls from carbide slag |
| CN113461345A (en) * | 2021-07-23 | 2021-10-01 | 沈阳鑫博工业技术股份有限公司 | Device and method for producing lime for calcium carbide by roasting calcium carbide slag and forming |
| CN114011834A (en) * | 2021-10-15 | 2022-02-08 | 江苏中圣园科技股份有限公司 | Carbide slag calcines reduction retrieval and utilization carbide stove coproduction desulfurizer system |
| CN114797668A (en) * | 2022-03-23 | 2022-07-29 | 北京蓝布息科技有限公司 | Calcium oxide ball pressing system and process for firing carbide slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111717916A (en) * | 2020-06-03 | 2020-09-29 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing calcium carbide raw material active calcium oxide by using wet-process calcium carbide slag |
| CN111717916B (en) * | 2020-06-03 | 2024-04-12 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing active calcium oxide as calcium carbide raw material by wet method calcium carbide slag |
| CN111498885A (en) * | 2020-06-15 | 2020-08-07 | 江苏莱蒙新型钙业发展有限公司 | Method for producing active calcium oxide by using carbide slag |
| CN113087002A (en) * | 2021-04-02 | 2021-07-09 | 沈阳东大东科干燥煅烧工程技术有限公司 | Method and system for preparing calcium oxide balls from carbide slag |
| CN113461345A (en) * | 2021-07-23 | 2021-10-01 | 沈阳鑫博工业技术股份有限公司 | Device and method for producing lime for calcium carbide by roasting calcium carbide slag and forming |
| CN114011834A (en) * | 2021-10-15 | 2022-02-08 | 江苏中圣园科技股份有限公司 | Carbide slag calcines reduction retrieval and utilization carbide stove coproduction desulfurizer system |
| CN114797668A (en) * | 2022-03-23 | 2022-07-29 | 北京蓝布息科技有限公司 | Calcium oxide ball pressing system and process for firing carbide slag |
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