CN107500572B - Method and system for preparing lime from waste artificial granite - Google Patents
Method and system for preparing lime from waste artificial granite Download PDFInfo
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- CN107500572B CN107500572B CN201710945423.4A CN201710945423A CN107500572B CN 107500572 B CN107500572 B CN 107500572B CN 201710945423 A CN201710945423 A CN 201710945423A CN 107500572 B CN107500572 B CN 107500572B
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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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
Abstract
The invention relates to the field of building material preparation, and provides a method for preparing lime from waste artificial granite, which comprises the following steps: adding 25-32% nitric acid solution into the artificial granite powder without the organic resin, reacting for 40-200 min, and filtering to obtain a first solution and first filter residue, wherein the mass ratio of the waste artificial granite powder to the nitric acid solution is 1: 37-47.5; adding a sodium carbonate solid into the first solution, reacting for 35-150 min, and filtering to obtain a second solution and a second filter residue, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1: 1.64-1.93; and firing the second filter residue at the high temperature of 900-1100 ℃ for 2-4 h to obtain the finished product lime. The method can effectively realize resource recycling and the quality of the prepared lime is good. The invention also provides a system for preparing lime from the waste artificial granite, which is used for implementing the method and has a simple structure, and the resource saving can be effectively realized.
Description
Technical Field
The invention relates to the field of building material preparation, in particular to a method and a system for preparing lime from waste artificial granite.
Background
The artificial granite is mainly used for decoration, and the artificial granite left after decoration or factory processing is directly discarded, the quantity of the discarded artificial granite in the state city of one year is about 50 ten thousand tons according to statistics, and the 50 ten thousand tons of the discarded artificial granite is difficult to be reused and is generally directly discarded near the used area due to transportation trouble, thereby seriously occupying the land area and causing the waste of resources. The calcium carbonate is relatively suitable for manufacturing lime due to relatively large amount of calcium carbonate, but the lime manufactured by directly burning the calcium carbonate contains more other impurities and has low purity and poor quality.
Disclosure of Invention
The invention provides a method for preparing lime from waste artificial granite, which aims to recycle the artificial granite to prepare lime and avoid the problem of resource waste, and the lime prepared by the method has good quality.
The invention also provides a system for preparing lime from the waste artificial granite, which has a simple structure and can effectively realize resource saving.
The invention is realized by the following steps:
a method for preparing lime from waste artificial granite comprises the following steps:
primary impurity removal: adding 25-32% nitric acid solution into the artificial granite powder without the organic resin, reacting for 40-200 min, and filtering to obtain a first solution and first filter residue, wherein the mass ratio of the waste artificial granite powder to the nitric acid solution is 1: 37-47.5;
and (3) generation of calcium carbonate: adding a sodium carbonate solid into the first solution, reacting for 35-150 min, and filtering to obtain a second solution and a second filter residue, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1: 1.64-1.93;
lime baking: and firing the second filter residue at the high temperature of 900-1100 ℃ for 2-4 h to obtain the finished product lime.
The system for preparing the lime from the waste artificial granite comprises a first mixing reaction tank, a first filter, a second mixing reaction tank, a second filter and a lime burning furnace which are sequentially connected.
Further, in a preferred embodiment of the present invention, the lime burning furnace further comprises a pre-burning furnace, and the pre-burning furnace is connected with one end of the lime burning furnace far away from the second filter.
Further, in a preferred embodiment of the present invention, a pulverizer is included, the pulverizer being located upstream of the first mixing reaction tank section.
Further, in a preferred embodiment of the present invention, a third burning oven is further included, and the third burning oven is connected with the first filter through a transmission device.
The invention has the beneficial effects that: according to the method for preparing lime from waste artificial granite, which is designed, due to the reasonable design of production steps, substances generated in each step can be recycled, zero resource waste is realized, and due to the fact that the artificial granite with good crystallization is adopted to prepare lime, the finally obtained lime has good quality and high purity after multiple impurity removal. The system for preparing lime from waste artificial granite, provided by the invention, has a simple structure, can be used together with the method provided by the invention to save resources, and can prepare lime with better quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a system for making lime from waste artificial granite according to an embodiment of the present invention.
Icon: 100-a system for preparing lime from waste artificial granite; 110-a pre-burning furnace; 111-an exhaust gas absorption unit; 112-a discharge hole; 120-a pulverizer; 121-feed inlet; 130-a third burning furnace; 140-a first mixed reaction tank; 150-a first filter; 160-a second mixed reaction tank; 170-a second filter; 180-lime firing furnace; 181-bag dust collector.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
It is to be understood that the described embodiments of the invention are only some of the described embodiments of the invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; may be a mechanical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following provides a detailed description of a method and a system for producing lime from waste artificial granite.
A method for preparing lime from waste artificial granite comprises the following steps:
s1, primary impurity removal: adding 25-32% nitric acid solution into the artificial granite powder without the organic resin, reacting for 40-200 min, and filtering to obtain a first solution and first filter residue, wherein the mass ratio of the waste artificial granite powder to the nitric acid solution is 1: 37-47.5.
The components of the waste artificial granite comprise calcium carbonate, organic resin, sodium silicate, calcium silicate and silicon dioxide, wherein the calcium carbonate is the main component. The mineral component of the limestone is calcite, but the crystallization is poor, the artificial granite is modified marble powder, the modified marble is white marble, and the mineral component is calcite, but the crystallization is very good, so that the quality of the lime prepared by the artificial granite is better.
Specifically, the waste artificial granite is first transported to a lime production plant, and the artificial granite is crushed, preferably to a particle size in the range of 1 μm to 10 μm, when the particle size is in this range, facilitating more complete firing at each subsequent high temperature. Removing organic resin before the primary impurity removing step: and (3) putting the crushed artificial granite in an environment with the temperature of 300-700 ℃ for burning for 1-2 h, so that the organic resin in the artificial granite is completely burnt. Preferably, in the burning process, the gas generated after burning is introduced into the alkaline solution to remove the acid gas and the soluble gas which are generated in the burning process of the organic resin and may pollute the environment.
In the embodiment of the present invention, the grinding and burning of the artificial granite may be performed in an alternate order, but in order to ensure complete combustion of the organic resin contained, it is preferable to grind the resin first and burn the resin later.
Adding the burned artificial granite powder into a nitric acid solution with the mass concentration of 25% -32% to react for 40-200 min, wherein the mass ratio of the waste artificial granite powder to the nitric acid solution is 1: 37-47.5, the artificial granite powder can enable all substances in the artificial granite powder to completely react with the nitric acid solution under the conditions of the nitric acid solution with the concentration, the proportion and the reaction time, the reaction conditions are mild and safe, the nitric acid solution reacts with calcium carbonate, sodium silicate and calcium silicate in the artificial granite powder to generate calcium nitrate, sodium nitrate and silicic acid, and the silicic acid is not dissolved in water. And after the reaction is finished, obtaining a solid-liquid mixture, and filtering the solid-liquid mixture to obtain a first solution and first filter residue, wherein the first filter residue consists of silicic acid and silicon dioxide.
Further, the obtained first filter residue is placed in an environment with the temperature of 150-200 ℃ to be burned for 10-25 min, and a burned product is recovered. And burning the first filter residue in the environment to decompose silicic acid in the first filter residue into silicon dioxide, and obtaining pure silicon dioxide solid after burning. The resulting silica can be recovered for sale. And the cyclic utilization of resources is realized.
S2, generation of calcium carbonate: adding a sodium carbonate solid into the first solution, reacting for 35-150 min, and filtering to obtain a second solution and a second filter residue, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1: 1.64-1.93.
Specifically, sodium carbonate solid is added to the first solution obtained by filtration, and the sodium carbonate and calcium nitrate in the first solution are reacted to generate calcium carbonate precipitate and sodium nitrate. The mass ratio of the sodium carbonate solid to the initially added artificial granite powder is 1: 1.64-1.93, and under the ratio, the sodium carbonate solid is ensured to react with the calcium nitrate in the first solution completely without wasting the sodium carbonate solid. The reaction time is 35-150 min, and the calcium carbonate can be completely precipitated within the time range. And filtering the solid-liquid mixture generated after the reaction is finished to obtain a second solution and a second filter residue, wherein the second solution is a sodium nitrate solution with high purity, and the second filter residue is a sodium carbonate solid. The sodium nitrate solution has high purity, and can be recycled and sold. Further realizing the resource recycling.
S3, lime firing: and firing the second filter residue at the high temperature of 900-1100 ℃ for 2-4 h to obtain the finished product lime.
Specifically, the second filter residue obtained by filtering is conveyed to a lime firing furnace, and is fired in an environment of 900-1100 ℃, and calcium carbonate is fired into finished lime.
Preferably, the air pressure in the firing furnace is increased and the dust is more in the lime firing process, and in order to ensure the safety information of the firing process, exhaust and dust removal are needed in the firing process to discharge carbon dioxide and prevent the dust from entering the air.
From the above description, it can be seen that the method for preparing lime from waste artificial granite provided by the invention wastes any raw materials and products in the production process at noon, can collect and recycle the products in each step, can effectively realize resource saving, and the finally prepared lime has better quality.
The system 100 for preparing lime from waste artificial granite comprises a first mixing reaction tank 140, a first filter 150, a second mixing reaction tank 160, a second filter 170 and a lime burning furnace 180 which are sequentially connected.
The method comprises the steps of conveying crushed and pre-sintered artificial granite powder without organic resin to a first mixing reaction tank 140 containing nitric acid solution for reaction for a period of time to generate a solid-liquid mixture, conveying the solid-liquid mixture to a first filter 150 for filtering to obtain a first solution and first filter residue, conveying the first solution to a second mixing reaction tank 160, adding sodium carbonate for reaction for a period of time to generate a large amount of solid, introducing the solid-liquid mixture into a second filter 170 for filtering to obtain a second filter residue and a second solution, and conveying the second filter residue to a lime burning furnace 180 for lime burning.
Further, the system 100 for making lime from waste artificial granite further includes a pre-burning furnace 110, and the pre-burning furnace 110 is connected to an end of the lime burning furnace 180 away from the second filter 170.
The crushed artificial granite is fired in the pre-firing furnace 110 to remove the organic resin, and then transferred to the first mixing reaction tank 140 for reaction. The end of the pre-burning furnace 110, which is connected with the lime burning furnace 180 and is far away from the second filter 170, can be preheated by using the residual heat of the lime output from the lime burning furnace 180, and as the lime brings out a part of heat, the energy consumption of the pre-burning furnace 110 can be reduced, and the resources are effectively saved.
Further, a crusher 120 is included, and the crusher 120 is located upstream of the first mixing reaction tank 140 section.
The waste artificial granite transported back from the outside is first crushed into powder by the crusher 120, then burned by the pre-burner 110 to remove the organic resin therein, and then transported to the first mixing reaction tank 140 for reaction. The feed inlet 121 of the whole section is communicated with the crusher 120, and the discharge outlet 112 is communicated with the pre-burning furnace 110.
The artificial granite enters the pulverizer 120 from the feed inlet 121 and is pulverized into powder, then enters the pre-firing furnace 110 to be fired to remove organic resin, then enters the first mixing reaction tank 140 to react with nitric acid, enters the first filter 150 to separate silicic acid and silicon dioxide, then enters the second mixing reaction tank 160 to react with sodium carbonate, enters the second filter 170 after the reaction is finished to be filtered to obtain calcium carbonate solid and sodium nitrate solution, and the sodium carbonate solid is conveyed to the lime firing furnace 180 to be fired with lime.
Further, the system 100 for making lime from waste artificial granite further includes a third burning furnace 130, and the third burning furnace 130 is connected to the first filter 150 by a conveyor. The first filter residue filtered by the first filter 150 is transported to the third burning furnace 130 by the transporting device to be burned, so that the silicic acid is decomposed to generate the silicon dioxide.
Further, the lime burning furnace 180 is connected with a bag-type dust collector 181, and the bag-type dust collector 181 is used for discharging gas in the lime burning furnace 180 and preventing dust from escaping into the air.
The method for producing lime from waste artificial granite according to the present invention will be described in detail with reference to the following specific examples.
Example 1
The waste artificial granite is conveyed to a grinder 120 to be ground into artificial granite powder, the artificial granite powder is conveyed to a pre-burning furnace 110 to be burned for 2 hours at the temperature of 300 ℃ to remove organic resin in the artificial granite powder, gas generated in the burning is introduced into a waste gas absorption device 111, and alkali liquor is filled in the waste gas absorption device 111 to remove tail gas. And after the burning is finished, conveying the mixture to a first mixed reaction tank 140 to react with a nitric acid solution with the mass concentration of 25%, wherein the mass ratio of the burned waste artificial granite powder to the nitric acid solution is 1:47.5, the reaction time is 40min, introducing the solid-liquid mixture after the reaction into a first filter 150 to filter to obtain first filter residue and a first solution, placing the first filter residue in a third burning furnace 130 at 150 ℃ to burn to obtain silicon dioxide, and recovering the silicon dioxide. Introducing the first solution into a second mixed reaction tank 160, adding sodium carbonate solid into the second mixed reaction tank 160, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1:1.64, the reaction time is 35min, after the reaction is finished, introducing the generated solid-liquid mixture into a second filter 170 for filtering to obtain a second filter residue and a second solution, wherein the second filter residue is calcium carbonate, the second solution is a sodium nitrate solution, recovering the sodium nitrate solution, introducing the calcium carbonate into a lime firing furnace 180, firing for 4h at 900 ℃ to obtain lime, and discharging gas generated during firing under the action of a bag-type dust remover 181, and blocking dust by the bag-type dust remover 181.
Example 2
The waste artificial granite is conveyed to a grinder 120 to be ground into artificial granite powder, the artificial granite powder is conveyed to a pre-burning furnace 110 to be burned for 1 hour at the temperature of 700 ℃ to remove organic resin in the artificial granite powder, gas generated in the burning is introduced into a waste gas absorption device 111, and alkali liquor is filled in the waste gas absorption device 111 to remove tail gas. And after the burning is finished, conveying the mixture to a first mixed reaction tank 140 to react with a nitric acid solution with the mass concentration of 32%, wherein the mass ratio of the burned waste artificial granite powder to the nitric acid solution is 1:37, the reaction time is 200min, introducing the solid-liquid mixture after the reaction into a first filter 150 to filter to obtain first filter residue and a first solution, placing the first filter residue in a third burning furnace 130 at 200 ℃ to burn to obtain silicon dioxide, and recovering the silicon dioxide. Introducing the first solution into a second mixed reaction tank 160, adding sodium carbonate solid into the second mixed reaction tank 160, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1:1.93, the reaction time is 150min, after the reaction is finished, introducing the generated solid-liquid mixture into a second filter 170 for filtering to obtain a second filter residue and a second solution, wherein the second filter residue is calcium carbonate, the second solution is a sodium nitrate solution, recovering the sodium nitrate solution, introducing the calcium carbonate into a lime firing furnace 180, firing the calcium carbonate for 2h at 1100 ℃ to obtain lime, and discharging gas generated during firing under the action of a bag-type dust remover 181, and blocking dust by the bag-type dust remover 181.
Example 3
The waste artificial granite is conveyed to a grinder 120 to be ground into artificial granite powder, the artificial granite powder is conveyed to a pre-burning furnace 110 to be burned for 1.5 hours at the temperature of 500 ℃ to remove organic resin in the artificial granite powder, gas generated in the burning is introduced into a waste gas absorption device 111, and alkali liquor is filled in the waste gas absorption device 111 to remove tail gas. And after the burning is finished, conveying the mixture to a first mixed reaction tank 140 to react with a nitric acid solution with the mass concentration of 28%, wherein the mass ratio of the burned waste artificial granite powder to the nitric acid solution is 1:40, the reaction time is 60min, introducing the solid-liquid mixture after the reaction into a first filter 150 to filter to obtain first filter residue and a first solution, placing the first filter residue in a third burning furnace 130 at 170 ℃ to burn to obtain silicon dioxide, and recovering the silicon dioxide. Introducing the first solution into a second mixed reaction tank 160, adding sodium carbonate solid into the second mixed reaction tank 160, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1:1.72, the reaction time is 50min, after the reaction is finished, introducing the generated solid-liquid mixture into a second filter 170 for filtering to obtain a second filter residue and a second solution, wherein the second filter residue is calcium carbonate, the second solution is a sodium nitrate solution, recovering the sodium nitrate solution, introducing the calcium carbonate into a lime firing furnace 180, firing for 2.5h at 1000 ℃ to obtain lime, and discharging gas generated during firing under the action of a bag-type dust remover 181, and blocking dust by the bag-type dust remover 181.
Example 4
The waste artificial granite is conveyed to a grinder 120 to be ground into artificial granite powder, the artificial granite powder is conveyed to a pre-burning furnace 110 to be burned for 1.2 hours at the temperature of 600 ℃ to remove organic resin in the artificial granite powder, gas generated in the burning is introduced into a waste gas absorption device 111, and alkali liquor is filled in the waste gas absorption device 111 to remove tail gas. And after the burning is finished, conveying the mixture to a first mixed reaction tank 140 to react with a nitric acid solution with the mass concentration of 30%, wherein the mass ratio of the burned waste artificial granite powder to the nitric acid solution is 1:43, the reaction time is 100min, introducing the solid-liquid mixture after the reaction into a first filter 150 to filter to obtain first filter residue and a first solution, placing the first filter residue in a third burning furnace 130 at 190 ℃ to burn to obtain silicon dioxide, and recovering the silicon dioxide. Introducing the first solution into a second mixed reaction tank 160, adding sodium carbonate solid into the second mixed reaction tank 160, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1:1.85, the reaction time is 120min, after the reaction is finished, introducing the generated solid-liquid mixture into a second filter 170 for filtering to obtain a second filter residue and a second solution, wherein the second filter residue is calcium carbonate, the second solution is a sodium nitrate solution, recovering the sodium nitrate solution, introducing the calcium carbonate into a lime firing furnace 180, firing the calcium carbonate for 3h at 950 ℃ to obtain lime, and discharging gas generated during firing under the action of a bag-type dust remover 181, and blocking dust by the bag-type dust remover 181.
Example 5
The waste artificial granite is conveyed to a grinder 120 to be ground into artificial granite powder, the artificial granite powder is conveyed to a pre-burning furnace 110 to be burned for 1.9 hours at the temperature of 400 ℃ to remove organic resin in the artificial granite powder, gas generated in the burning is introduced into a waste gas absorption device 111, and alkali liquor is filled in the waste gas absorption device 111 to remove tail gas. And after the burning is finished, conveying the mixture to a first mixed reaction tank 140 to react with a nitric acid solution with the mass concentration of 26%, wherein the mass ratio of the burned waste artificial granite powder to the nitric acid solution is 1:46, the reaction time is 130min, introducing the solid-liquid mixture after the reaction into a first filter 150 to filter to obtain first filter residue and a first solution, placing the first filter residue in a third burning furnace 130 at 160 ℃ to burn to obtain silicon dioxide, and recovering the silicon dioxide. Introducing the first solution into a second mixed reaction tank 160, adding sodium carbonate solid into the second mixed reaction tank 160, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1:1.9, the reaction time is 140min, after the reaction is finished, introducing the generated solid-liquid mixture into a second filter 170 for filtering to obtain a second filter residue and a second solution, wherein the second filter residue is calcium carbonate, the second solution is a sodium nitrate solution, recovering the sodium nitrate solution, introducing the calcium carbonate into a lime firing furnace 180, firing the calcium carbonate for 3.5h at 1050 ℃ to obtain lime, and discharging gas generated during firing under the action of a bag-type dust remover 181, and blocking dust by the bag-type dust remover 181.
In conclusion, the method for preparing lime from waste artificial granite, provided by the invention, has the advantages that due to reasonable design of production steps, substances generated in each step can be recycled, zero resource waste is realized, and due to the fact that the artificial granite with good crystallization is adopted to prepare lime, the finally obtained lime has good quality, and the purity is high after multiple impurity removal processes. The system for preparing lime from waste artificial granite, provided by the invention, has a simple structure, can be used together with the method provided by the invention to save resources, and can prepare lime with better quality.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for preparing lime from waste artificial granite is characterized by comprising the following steps:
removing the organic resin: burning the waste artificial granite at 300-700 deg.c, crushing to obtain the artificial granite powder with the organic resin removed, and burning at 300-700 deg.c to produce gas and alkaline solution to eliminate acid gas and soluble gas;
primary impurity removal: adding a nitric acid solution with the mass concentration of 25-32% into the artificial granite powder without the organic resin, reacting for 40-200 min, filtering to obtain a first solution and a first filter residue, wherein the mass ratio of the waste artificial granite powder to the nitric acid solution is 1: 37-47.5, and burning the first filter residue at 150-200 ℃ for 10-25 min to recover a burned product;
and (3) generation of calcium carbonate: adding a sodium carbonate solid into the first solution, reacting for 35-150 min, and filtering to obtain a second solution and a second filter residue, wherein the mass ratio of the sodium carbonate solid to the artificial granite powder is 1: 1.64-1.93;
lime baking: and firing the second filter residue at the high temperature of 900-1100 ℃ for 2-4 h to obtain the finished product lime.
2. The method for making lime from waste artificial granite according to claim 1, further comprising, before the preliminary impurity removal step:
and crushing the waste artificial granite to obtain artificial granite powder, and then burning the artificial granite powder at the temperature of between 300 and 700 ℃ for 1 to 2 hours to obtain the artificial granite powder without the organic resin.
3. The method for preparing lime from waste artificial granite according to claim 1, wherein the second filter residue is burned in the lime burning process by exhausting and dedusting.
4. A system for manufacturing waste artificial granite lime, which is used for implementing the method for manufacturing waste artificial granite lime according to any one of claims 1 to 3, and which comprises a first mixing reaction tank, a first filter, a second mixing reaction tank, a second filter and a lime burning furnace connected in sequence;
the system for preparing lime from waste artificial granite further comprises a pre-burning furnace, a third burning furnace and a waste gas absorption device, wherein the pre-burning furnace is connected with one end, far away from the second filter, of the lime burning furnace, the third burning furnace is connected with the first filter through a conveying device, and the waste gas absorption device is communicated with the pre-burning furnace and used for absorbing gas discharged by the pre-burning furnace.
5. The system for making lime from waste artificial granite according to claim 4, further comprising a crusher located upstream of the first mixing reaction tank section.
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| CN108383405B (en) * | 2018-05-30 | 2020-10-30 | 中国地质大学（北京） | Method for preparing gypsum board by using artificial granite cutting scraps |
| CN109761581A (en) * | 2019-03-29 | 2019-05-17 | 吴正巧 | A kind of brickmaking technology with desulfidation |
| CN110003594B (en) * | 2019-04-26 | 2021-06-25 | 四川大学 | Artificial granite waste residue filled polymer composite material and preparation method thereof |
| CN110902708B (en) * | 2019-12-13 | 2022-08-16 | 贺州学院 | Method for preparing nano calcium carbonate by using artificial granite waste residues |
| CN110963719A (en) * | 2020-01-06 | 2020-04-07 | 张镇 | Method and device for preparing quicklime |
| CN114273408A (en) * | 2021-12-31 | 2022-04-05 | 广西康利岗石有限公司 | Method for removing cured unsaturated resin from artificial granite waste residue |
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| NO20091130L (en) * | 2009-03-17 | 2010-09-20 | Inst Energiteknik | Process for Industrial Preparation of Precipitated Calcium Carbonate (CaCO3) from Carbonate-containing Rocks |
| CN101559967B (en) * | 2009-05-31 | 2011-09-28 | 四川大学 | Method for preparing barium nitrate, calcium nitrate, calcium sulfate and sodium nitrate by utilizing middle and low grade barium carbonate ore |
| JP5694847B2 (en) * | 2011-05-18 | 2015-04-01 | 株式会社白石中央研究所 | Method for producing high purity calcium carbonate |
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| CN104724745A (en) * | 2013-12-23 | 2015-06-24 | 天津市科密欧化学试剂有限公司 | Preparation method of high-purity calcium carbonate reagent |
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