CN111362597B - Marble waste residue treatment process - Google Patents
Marble waste residue treatment process Download PDFInfo
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- CN111362597B CN111362597B CN202010204386.3A CN202010204386A CN111362597B CN 111362597 B CN111362597 B CN 111362597B CN 202010204386 A CN202010204386 A CN 202010204386A CN 111362597 B CN111362597 B CN 111362597B
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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
- C04B2/104—Ingredients added before or during the burning process
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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
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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
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
- Y02P40/45—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills using fuels from renewable energy sources
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application discloses a marble waste residue treatment process, and belongs to the field of calcium oxide materials. The marble waste residue treatment process of the application comprises the following steps: the marble Dan Feizha is dried, dehydrated, uniformly mixed with an accelerator, and then put into a combination tool, and then the combination tool is orderly put on a kiln car and pushed into a tunnel kiln, and simultaneously the temperature in the kiln is increased by burning fuel, so that marble waste residues are preheated; the kiln car enters from the kiln head, after the kiln car stays for 10-15 hours in a high temperature zone, the kiln car is pushed out of the kiln tail in sequence, the obtained finished product is taken out after cooling, the empty kiln car is reloaded, and the repeated cyclic production is carried out; the waste gas in the kiln is discharged after being treated. The treatment process can change waste materials of stone processing factories into valuable materials, and achieves the aim of 'economic cycle'.
Description
Technical Field
The application relates to the field of calcium oxide materials, in particular to a marble waste residue treatment process.
Background
In the marble processing process, a large amount of solid waste, namely waste residue, is generated in the processes of saw blade, cutting and grinding. With the continuous development of marble industry, the generated waste is piled up like mountain, not only occupies a large amount of land, but also dust pollution and pollution to water source seriously affect the life of people. And simultaneously restricts the economic sustainable development of the area. The method for treating pollution, optimizing environment and saving resources is an important measure for changing the sustainable development of economy and the economic growth mode in the concentrated area of marble processing. During the processing of natural stone, about 5% of rough materials and about 1/3 of leftover bits and pieces of rough board are produced. If the waste is discarded, the waste is carried out at an economic cost, and the improper stacking is not beneficial to environmental protection.
The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present application and is not necessarily prior art to the present application and is not intended to be used as an aid in the evaluation of the novelty and creativity of the present application in the event that no clear evidence indicates that such is already disclosed at the date of filing of the present application.
Disclosure of Invention
The application aims to provide a marble waste residue treatment process, which aims to solve the technical problems of influence of marble waste residue on the environment and improvement of calcium oxide yield and quality.
For this purpose, the application proposes the following scheme:
a marble waste residue treatment process comprises the following steps:
s1: drying marble Dan Feizha to remove water, uniformly mixing the dried marble waste residue with an accelerator, then loading the mixture into a mixer, orderly loading the mixer onto a kiln car and pushing the mixer into a tunnel kiln, simultaneously burning fuel to raise the temperature in the kiln, and preheating the marble waste residue for 2-5 hours at 300-600 ℃;
s2: the kiln car enters from the kiln head, the temperature in a high temperature zone reaches 1100-1300 ℃, the oxygen content in the tunnel kiln is regulated to 6-8%, after the kiln car stays for 10-15h, the kiln car is pushed out of the kiln tail in sequence, and the obtained finished product is taken out and cooled; the waste gas in the kiln is treated and then secondarily utilized or discharged;
preferably, the fuel is one or both of biomass particles and natural gas, the methane content in the natural gas being >90%.
Preferably, the kiln car is propelled by a hydraulic propeller to move the kiln car at a speed of 7-10m/h in the tunnel kiln.
Preferably, the waste gas treatment is that waste gas is treated by a water mist spraying dust removing device.
Preferably, the accelerator comprises the following components in parts by weight: 15-27 parts of vanadium pentoxide, 7-20 parts of bismuth trioxide and 0.1-1 part of copper oxide.
Preferably, the addition amount of the accelerator is 0.1-0.5% of the mass of the waste residue.
Preferably, the preparation process of the accelerator comprises the following steps:
s1: uniformly mixing vanadium pentoxide and bismuth trioxide, grinding, and sieving with 300-350 meshes to obtain a mixture 1;
s2: adding the mixture 1 and copper oxide into a stirrer, stirring at 1100-1300rpm for 20-40min, and oven drying at 27-35deg.C until water content is less than 10% to obtain the final product.
Preferably, the step of drying the waste residues comprises the following steps: and (3) delivering the waste residues into a dryer, drying the waste residues at 100-400 ℃ for 10-20min, and rotating and drying the waste residues in a drying roller with the diameter of 1.5m at 3-6rpm in the drying process until the water content of the waste residues is less than 10%.
Preferably, the drying is performed at a temperature of 320 ℃.
Preferably, in the waste residue drying step, the waste gas after being treated in the kiln is sent to a dryer through an exhaust fan so that the temperature is increased to achieve waste gas secondary utilization.
Compared with the prior art, the application has the beneficial effects that:
1. in the product of the embodiment of the application, the content of calcium oxide reaches more than 92.24 percent and reaches a better level. The data show that the addition of vanadium pentoxide, bismuth trioxide and copper oxide has beneficial effects on the removal of silicon dioxide and magnesium oxide by increasing the calcium oxide content. After the accelerant is added and the marble waste residue is treated by the method, the obtained finished product has higher calcium oxide content and reduced impurities.
2. In combination with the data in table 1, it can be seen that in the accelerator, three substances of vanadium pentoxide, bismuth trioxide and copper oxide play a synergistic role in the decomposition process of calcium carbonate, so that the content of calcium oxide in the substance obtained after the treatment of marble waste residue is increased.
3. In practical application, the treatment process production line can produce 4.5 ten thousand tons/year of calcium oxide, can recycle and treat marble and Dan Feizha 8.75.75 ten thousand tons/year of sentry, and effectively treat waste residues generated by stone processing factories; meanwhile, biomass particles and natural gas are used as fuel, so that the method is cleaner than the traditional processing method using coal and the like as fuel.
Drawings
FIG. 1 is a process flow diagram of the present application;
FIGS. 2 and 3 are tunnel kiln views of the present application;
FIG. 4 is a side view of a tunnel kiln according to the present application;
FIGS. 5 and 6 are kiln car diagrams of the present application;
FIG. 7 is a diagram of the present application.
Detailed Description
The application will be described in further detail with reference to the following detailed description and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the application or its applications.
Non-limiting and non-exclusive embodiments will be described with reference to the following drawings, in which like reference numerals refer to like elements unless otherwise specified.
Example 1
A marble slag treatment process, as shown in fig. 1, comprising the steps of:
s1: drying marble Dan Feizha to remove water, uniformly mixing dried marble waste residue and an accelerator accounting for 0.1% of the mass of the waste residue, then loading the mixture into a combination tool (figure 7), orderly loading the combination tool onto a kiln car and pushing the kiln car into a tunnel kiln (figure 2), simultaneously burning fuel to raise the temperature in the kiln, and preheating the marble waste residue for 2 hours at 300 ℃;
s2: the kiln car (figures 5 and 6) enters from the kiln head (figure 3), the temperature in a high temperature zone reaches 1100 ℃, the oxygen content in the tunnel kiln is regulated to 6%, after the kiln car stays for 10 hours, the kiln car is pushed out of the kiln tail in sequence, and the obtained finished product is taken out and cooled; the waste gas in the kiln is treated and then secondarily utilized or discharged;
the fuel is biomass particles.
The kiln car is pushed by a hydraulic propeller, so that the kiln car moves in the tunnel kiln at a speed of 7 m/h.
The waste gas treatment is that waste gas is treated by a water mist spraying dust collector.
The waste residue drying step is as follows: and (3) conveying the waste residues into a dryer, drying the waste residues at the temperature of 100 ℃ for 10min, and rotating and drying the waste residues in a drying roller with the diameter of 1.5m at 3rpm in the drying process until the water content of the waste residues is less than 10%.
And in the waste residue drying step, the waste gas after being treated in the kiln is sent to a dryer through an exhaust fan, so that the temperature is increased to achieve the secondary utilization of the waste gas.
The accelerator comprises the following components in parts by weight: 15 parts of vanadium pentoxide, 7 parts of bismuth trioxide and 0.1 part of copper oxide.
The preparation process of the accelerator comprises the following steps:
s1: uniformly mixing vanadium pentoxide and bismuth trioxide, grinding, and sieving with a 300-mesh sieve to obtain a mixture 1;
s2: adding the mixture 1 and copper oxide into a stirrer, stirring at 1100rpm for 20min, and drying at 27deg.C until the water content is less than 10%, to obtain the final product.
Example 2
A marble slag treatment process, as shown in fig. 1, comprising the steps of:
s1: drying marble Dan Feizha to remove water, uniformly mixing dried marble waste residue and an accelerator accounting for 0.5% of the mass of the waste residue, then loading the mixture into a combination tool (figure 7), orderly loading the combination tool onto a kiln car and pushing the kiln car into a tunnel kiln (figure 2), simultaneously burning fuel to raise the temperature in the kiln, and preheating the marble waste residue for 5 hours at 600 ℃;
s2: the kiln car (figures 5 and 6) enters from the kiln head (figure 3), the temperature in a high temperature zone reaches 1300 ℃, the oxygen content in the tunnel kiln is regulated to 8%, after the kiln car stays for 15 hours, the kiln car is pushed out of the kiln tail in sequence, and the obtained finished product is taken out and cooled; the waste gas in the kiln is treated and then secondarily utilized or discharged;
the fuel is natural gas, and the methane content in the natural gas is 92%.
The kiln car is pushed by a hydraulic propeller, so that the kiln car moves in the tunnel kiln at a speed of 10 m/h.
The waste gas treatment is that waste gas is treated by a water mist spraying dust collector.
The waste residue drying step is as follows: and (3) conveying the waste residues into a dryer, drying the waste residues at 400 ℃ for 20min, and rotating and drying the waste residues in a drying roller with the diameter of 1.5m at 6rpm in the drying process until the water content of the waste residues is less than 10%.
And in the waste residue drying step, the waste gas after being treated in the kiln is sent to a dryer through an exhaust fan, so that the temperature is increased to achieve the secondary utilization of the waste gas.
The accelerator comprises the following components in parts by weight: 27 parts of vanadium pentoxide, 20 parts of bismuth trioxide and 1 part of copper oxide.
The preparation process of the accelerator comprises the following steps:
s1: uniformly mixing vanadium pentoxide and bismuth trioxide, grinding, and sieving with a 350-mesh sieve to obtain a mixture 1;
s2: adding the mixture 1 and copper oxide into a stirrer, stirring at 1300rpm for 40min, and oven drying at 35deg.C until the water content is less than 10%, to obtain the final product.
Example 3
A marble slag treatment process, as shown in fig. 1, comprising the steps of:
s1: drying marble Dan Feizha to remove water, uniformly mixing dried marble waste residue and an accelerator with the mass of 0.37% of the waste residue, then loading the mixture into a combination tool (figure 7), loading the combination tool on a kiln car in order, pushing the combination tool into a tunnel kiln (figure 2), burning fuel to raise the temperature in the kiln, and preheating marble Dan Feizha at 400 ℃ for 3 hours;
s2: the kiln car (figures 5 and 6) enters from the kiln head (figure 3), the temperature in a high temperature zone reaches 1200 ℃, the oxygen content in the tunnel kiln is regulated to 7%, after the kiln car stays for 13 hours, the kiln car is pushed out of the kiln tail in sequence, and the obtained finished product is taken out and cooled; the waste gas in the kiln is treated and then secondarily utilized or discharged;
the fuel is biomass particles.
The kiln car is pushed by a hydraulic propeller, so that the kiln car moves in the tunnel kiln at the speed of 9 m/h.
The waste gas treatment is that waste gas is treated by a water mist spraying dust collector.
The waste residue drying step is as follows: and (3) conveying the waste residues into a dryer, drying the waste residues at 320 ℃ for 16min, and rotating and drying the waste residues in a drying roller with the diameter of 1.5m at 5rpm in the drying process until the water content of the waste residues is less than 10%.
And in the waste residue drying step, the waste gas after being treated in the kiln is sent to a dryer through an exhaust fan, so that the temperature is increased to achieve the secondary utilization of the waste gas.
The accelerator comprises the following components in parts by weight: 21 parts of vanadium pentoxide, 14 parts of bismuth trioxide and 0.62 part of copper oxide.
The preparation process of the accelerator comprises the following steps:
s1: uniformly mixing vanadium pentoxide and bismuth trioxide, grinding, and sieving with a 350-mesh sieve to obtain a mixture 1;
s2: adding the mixture 1 and copper oxide into a stirrer, stirring at 1300rpm for 30min, and oven drying at 31deg.C until the water content is less than 10% to obtain the final product.
Comparative example 1
The process flow was essentially the same as in example 3, except that no vanadium pentoxide was added to the accelerator.
Comparative example 2
The process flow was essentially the same as in example 3, except that no bismuth trioxide was added to the accelerator.
Comparative example 3
The process flow was essentially the same as in example 3 except that no copper oxide was added to the accelerator.
Comparative example 4
The process flow is basically the same as in example 3, except that no vanadium pentoxide, bismuth trioxide or copper oxide is added to the accelerator.
The finished products obtained from the marble slag treated by the processes of examples 1 to 3, comparative examples 1 to 4 were examined according to GB/T4734-1996, and the obtained data are shown in the following table.
TABLE 1 chemical content of marble slag after treatment
| Group of | CaO(％) | SiO 2 (％) | MgO(％) |
| Example 1 | 92.24 | 5.76 | 2.44 |
| Example 2 | 93.72 | 5.21 | 2.36 |
| Example 3 | 94.15 | 4.97 | 2.09 |
| Comparative example 1 | 90.81 | 6.19 | 3.13 |
| Comparative example 2 | 88.37 | 6.38 | 3.75 |
| Comparative example 3 | 88.46 | 6.70 | 2.59 |
| Comparative example 4 | 80.62 | 7.49 | 5.83 |
In the product of the embodiment of the application, the content of calcium oxide reaches more than 92.24 percent and reaches a better level. The data show that the addition of vanadium pentoxide and copper oxide has beneficial effects on the removal of silicon dioxide and magnesium oxide by increasing the content of calcium oxide. In the absence of the accelerator, the calcium oxide content of example 1 was increased by 14.41% compared with that of comparative example 4, and the silica and magnesia contents were reduced by 23.09% and 58.10%, respectively. It can be seen that the calcium oxide content of the finished product obtained after the accelerator is added and the marble waste residue is treated by the method of the application is higher, and the content of silicon dioxide and magnesium oxide which are used as impurities and occupy larger proportion is also reduced.
In the accelerator, after vanadium pentoxide is added, particles are reduced when the vanadium pentoxide is melted in the heating and temperature rising process, and then the vanadium pentoxide is filled into pore gaps of calcium carbonate particles, so that heat transfer is accelerated, and decomposition of calcium carbonate is promoted. The added copper oxide can react with the decomposition products of calcium carbonate to generate CaCu 2 O 3 And Ca 2 CuO 3 The product layer can be partially or wholly thinned to reduce mass transfer resistance in thermal decomposition, and promote calcium carbonate decomposition and CaCu 2 O 3 And Ca 2 CuO 3 After production, vanadium pentoxide can also be filled into the pore gaps of the two material particles, so that the heat transfer is accelerated, and the decomposition of calcium carbonate is further accelerated. Bismuth trioxide reacts with the calcium oxide formed at high temperatures to form Ca 6 Bi 7 O 16.5 The method can improve the diffusion efficiency of carbon dioxide in a product layer, improve the diffusion rate of carbon dioxide into copper oxide, strengthen the reaction and promote the decomposition of calcium carbonate. In combination with the data in table 1, it can be seen that three substances of vanadium pentoxide, bismuth trioxide and copper oxide play a synergistic role in the decomposition process of calcium carbonate, so that the content of calcium oxide obtained after the treatment of marble waste residue is increased.
Those skilled in the art will recognize that numerous variations to the above description are possible, and that the examples are intended only to be illustrative of one or more particular implementations.
The foregoing is a further detailed description of the application in connection with specific/preferred embodiments, and is not intended to limit the practice of the application to such description. It will be apparent to those skilled in the art that several alternatives or modifications can be made to the described embodiments without departing from the spirit of the application, and these alternatives or modifications should be considered to be within the scope of the application.
Claims (9)
1. The marble waste residue treatment process is characterized by comprising the following steps:
s1: drying marble Dan Feizha to remove water, uniformly mixing the dried marble waste residue with an accelerator, then loading the mixture into a mixer, orderly loading the mixer onto a kiln car and pushing the mixer into a tunnel kiln, simultaneously burning fuel to raise the temperature in the kiln, and preheating the marble waste residue for 2-5h at 300-600 ℃;
s2: the kiln car enters from the kiln head, the temperature in a high temperature zone reaches 1100-1300 ℃, the oxygen content in the tunnel kiln is regulated to 6-8%, after the kiln car stays for 10-15h, the kiln car is pushed out of the kiln tail in sequence, and the obtained finished product is taken out and cooled; the waste gas in the kiln is treated and then secondarily utilized or discharged;
the accelerator comprises the following components in parts by weight: 15-27 parts of vanadium pentoxide, 7-20 parts of bismuth trioxide and 0.1-1 part of copper oxide.
2. The marble slag treatment process of claim 1, wherein the fuel is one or both of biomass particles and natural gas having a methane content of >90%.
3. The marble slag treatment process of claim 1, wherein the kiln car is pushed using a hydraulic pusher to move the kiln car at a speed of 7-10m/h in the tunnel kiln.
4. The marble slag treatment process of claim 1, wherein the waste gas treatment is a treatment of waste gas by a water mist spray dust remover.
5. The marble slag treatment process of claim 1 or 4, wherein the accelerator is added in an amount of 0.1 to 0.5% by mass of the slag, based on the dry state.
6. The marble slag treatment process of claim 1 or 4, wherein the process for preparing the accelerator comprises the steps of:
s1: uniformly mixing vanadium pentoxide and bismuth trioxide, grinding, and sieving with 300-350 meshes to obtain a mixture 1;
s2: adding the mixture 1 and copper oxide into a stirrer, stirring at 1100-1300rpm for 20-40min, and baking at 27-35deg.C until the water content is less than 10% to obtain the final product.
7. The marble slag treatment process of claim 1, wherein the slag drying step is: and (3) delivering the waste residues into a dryer, drying the waste residues at 100-400 ℃ for 10-20min, and rotating and drying the waste residues in a drying roller with the diameter of 15m at 3-6rpm in the drying process until the water content of the waste residues is less than 10%.
8. The marble slag treatment process of claim 7, wherein said drying is performed at a temperature of 320 ℃.
9. The marble slag treatment process of claim 1 or 7, wherein the slag drying step, the exhaust gas after the kiln treatment is sent to a dryer by an exhaust fan to raise the temperature to the exhaust gas for secondary use.
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| CN102329091A (en) * | 2011-08-10 | 2012-01-25 | 衡南县宏滔废渣处理厂 | Technique and preparation method for producing cement from industrial residues |
| CN108751145A (en) * | 2018-07-03 | 2018-11-06 | 贵州大学 | A kind of sanitary ware preparing sour coproduction artificial marble technique |
| CN110436824A (en) * | 2019-09-05 | 2019-11-12 | 厦门高时实业有限公司 | A kind of artificial stone and preparation method thereof made of marble wastes |
| CN110627384A (en) * | 2019-10-18 | 2019-12-31 | 湖北大学 | Process method for preparing active calcium oxide by oxygen-enriched calcination |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI1102992A2 (en) * | 2011-06-14 | 2013-11-19 | Ecofill Espec Em Tecnologia De Transf De Residuos Ltda | PRECIPITATED CALCIUM CARBONATE OBTAINING SYSTEM FROM CALCIUM CARBONATE SLUDGE WASTE; WASTE RECOVERY, BENEFIT AND PURIFICATION PROCESS Calcium Carbonate Sludge and Resulting Precipitated Calcium Carbonate Product |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011168445A (en) * | 2010-02-18 | 2011-09-01 | Setekku:Kk | Method of calcining powdery calcium carbonate |
| CN102329091A (en) * | 2011-08-10 | 2012-01-25 | 衡南县宏滔废渣处理厂 | Technique and preparation method for producing cement from industrial residues |
| CN108751145A (en) * | 2018-07-03 | 2018-11-06 | 贵州大学 | A kind of sanitary ware preparing sour coproduction artificial marble technique |
| CN110436824A (en) * | 2019-09-05 | 2019-11-12 | 厦门高时实业有限公司 | A kind of artificial stone and preparation method thereof made of marble wastes |
| CN110627384A (en) * | 2019-10-18 | 2019-12-31 | 湖北大学 | Process method for preparing active calcium oxide by oxygen-enriched calcination |
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