Engineering muck multi-feature rapid analysis and sintered product preparation raw material matching method

Abstract

The invention discloses a method for rapidly analyzing multiple characteristics of engineering residue soil and matching raw materials for preparing sintered products. The method comprises the following steps: 1, weighing and sampling; 2, drying to obtain water content; 3, performing XRD (X-Ray Diffraction) testing, XRF (X-Ray Fluorescence) testing and heavy metal testing to obtain mineral composition, chemical components, ignition loss and heavy metal content; 4, testing particle size distribution to obtain particle composition and gravel content; 5, counting; 6, obtaining data of the engineering residue soil; and 7, carrying out raw material matching on the engineering residue soil and other solid waste materials according to the chemical components and ignition loss to prepare a sintered product. Through a multi-feature synchronous analysis means, the engineering muck is weighed and sampled, and multiple features of the engineering muck are quickly analyzed to obtain data of the engineering muck, so that quick and accurate analysis of the multiple features of the engineering muck is realized, and then a solid waste material database is obtained, so that raw material matching is performed on the solid waste material database; and the utilization efficiency of the engineering residue soil is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of building materials, and particularly relates to a method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products. Background Art

[0002] With the acceleration of the urbanization process in China, the scale of engineering construction has been continuously expanding, generating a large amount of solid waste materials. Among them, construction waste accounts for a large proportion. As the main component of construction waste, the output of construction waste soil has also been increasing year by year. However, at present, the treatment of construction waste soil mainly relies on landfill and open stacking, and the resource utilization rate is less than 20%. Moreover, the improper treatment of waste soil not only occupies land resources but also poses a serious threat to the environment. In recent years, environmental protection regulations have become stricter (such as the revision of the Law on the Prevention and Control of Environmental Pollution by Solid Wastes), requiring the resource utilization rate of waste soil to be increased to more than 60%.

[0003] At present, the basic feature analysis of waste soil is relatively scattered, requiring sample pretreatment and long time-consuming for single detection, resulting in a lot of repetitive work and high frequency of repeated inspections, unable to meet the rapid decision-making needs of waste soil resource utilization, and lacking means for synchronous multi-feature analysis. The existing matching methods for construction waste soil mostly rely on multiple detections and comparisons one by one to find suitable matching raw materials, resulting in repeated experiments for compounding schemes, increasing time costs, and being difficult to find the best matching raw materials.

[0004] Therefore, there is a need to provide a method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products in view of the above-mentioned deficiencies of the prior art. This method uses synchronous multi-feature analysis means to weigh and sample construction waste soil, and rapidly analyze multiple features of the construction waste soil respectively to obtain data of the construction waste soil, realizing rapid and accurate analysis of multiple features of the construction waste soil, and then obtaining a solid waste material database, so as to use the solid waste material database for raw material matching and improve the utilization efficiency of construction waste soil.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products, characterized in that the method comprises the following steps: Step 1: Weigh and sample the construction waste soil to obtain 3 samples; Step 2: Put the 3 samples obtained in Step 1 into 3 drying boxes respectively, and then dry them in a drying oven to obtain 3 dried samples, and obtain the moisture content of the construction waste soil; Step 3: Put the 3 dry samples obtained in Step 2 into 3 centrifugal small screening machines respectively for grinding and screening, and then conduct XRD tests, XRF tests and heavy metal tests respectively to obtain the mineral composition, chemical composition, loss on ignition and heavy metal content of the construction waste soil; Step 4: Conduct particle size distribution tests on the construction waste soil to obtain the particle composition and sand and gravel content of the construction waste soil; Step 5: Statistically analyze the chemical composition and loss on ignition of the construction waste soil obtained in Step 3 according to the following units: (1) SiO2 < 50%; (2) SiO2 > 80%; (3) Al2O3 < 5%; (4) Al2O3 > 25%; (5) Fe2O3 < 2%; (6) Fe2O3 > 15%; (7) CaO > 15%; (8) MgO > 5%; (9) SO3 > 3%; (10) loss on ignition < 3%; (11) loss on ignition > 15%; (12) fully compliant unit, i.e., 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, loss on ignition 3% - 15%; the contents in the units are all mass contents; Step 6: Based on the statistics in Step 5 and the moisture content obtained in Step 2, the mineral composition and heavy metal content obtained in Step 3, and the particle composition and sand and gravel content obtained in Step 4, obtain the data of the construction waste soil; Step 7: Statistically analyze the chemical composition and loss on ignition of other solid waste materials according to the units in Step 5, and combine the mineral composition and heavy metal content of other solid waste materials and the data of the construction waste soil obtained in Step 6 to obtain a solid waste material database. Match the raw materials of the construction waste soil and other solid waste materials according to the chemical composition and loss on ignition in the solid waste material database to meet the following conditions: 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, loss on ignition 3% - 15%, and then prepare sintered products.

[0007] The present invention conducts weighing and sampling on construction waste soil, and rapidly analyzes multiple characteristics of the water content, mineral composition, chemical composition, loss on ignition, heavy metal content, particle composition, and sand and gravel content of the construction waste soil to obtain data on the construction waste soil. Among them, the water content is used to control the water content of the raw materials for sintered products, and when the water content of the raw materials for sintered products is too high, the raw materials are dried to ensure the performance of the sintered products. The mineral composition determines the composition of various phases in the sintered products and properties such as plasticity, drying shrinkage, firing shrinkage, compressive strength, frost resistance, refractoriness, flexural strength, and color. By testing the mineral composition, the content of each phase and various properties in the sintered products can be predicted to obtain sintered products that meet the usage requirements. Moreover, the mineral composition is closely related to the content of the chemical composition and is determined by the combination method of the chemical composition. The chemical composition determines the properties such as plasticity, drying shrinkage, firing shrinkage, compressive strength, frost resistance, refractoriness, flexural strength, and color of the sintered products, which are the basic properties of the raw materials for sintered products. By testing the chemical composition, various properties of the sintered products can be predicted to obtain sintered products that meet the usage requirements. The loss on ignition determines the drying shrinkage of the sintered products. By testing the loss on ignition, cracking of the sintered products can be prevented. The heavy metal content determines the leaching risk of heavy metals in the sintered products, which will have an impact on the environment and also on the process. By testing the heavy metal content, heavy metal leaching can be prevented and the preparation process can be adjusted in a timely manner. Through particle size distribution testing, according to the results of the particle size distribution, the particle composition is obtained, and the sand and gravel content is calculated. The particle composition and the sand and gravel content determine the forming effect of the sintered products and also determine properties such as plasticity, shrinkage rate, sintering performance, and drying sensitivity coefficient. By testing the particle composition, the density and shrinkage rate of the sintered products can be predicted to obtain sintered products that meet the usage requirements.

[0008] The present invention rapidly analyzes multiple characteristics of construction waste soil to obtain data of the construction waste soil, and then forms a solid waste material database with the construction waste soil data and other solid waste materials. The construction waste soil and other solid waste materials in the solid waste material database will meet one or more of the following conditions: (1) SiO2 < 50%; (2) SiO2 > 80%; (3) Al2O3 < 5%; (4) Al2O3 > 25%; (5) Fe2O3 < 2%; (6) Fe2O3 > 15%; (7) CaO > 15%; (8) MgO > 5%; (9) SO3 > 3%; (10) loss on ignition < 3%; (11) loss on ignition > 15%; (12) fully compliant unit, i.e., 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, loss on ignition 3% - 15%. When performing raw material matching, the construction waste soil that meets (1) SiO2 < 50% is preferentially matched with the construction waste soil that meets (2) SiO2 > 80% or other solid waste materials that meet (2) SiO2 > 80%, and vice versa, to meet (12) the fully compliant unit. The same applies to other conditions, enabling rapid matching of raw materials, making the matched raw materials meet the requirements for preparing sintered products, preparing sintered products, realizing the precise utilization and rapid matching of construction waste soil, and improving the utilization efficiency of construction waste soil.

[0009] In the present invention, XRF testing can simultaneously obtain chemical components and loss on ignition.

[0010] For the above method for rapid analysis of multiple characteristics of a certain construction waste soil and matching of raw materials for preparing sintered products, it is characterized in that in step one, the 3 samples are respectively denoted as sample No. 1, sample No. 2, and sample No. 3, and their masses are 5 g - 10 g, 8 g - 15 g, and 15 g - 20 g respectively. According to different testing requirements and considering moisture and process losses, the present invention sets samples with different masses to ensure accurate test results.

[0011] The above-mentioned method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products is characterized in that, in step two, the drying box includes a cuboid box body and a box cover matching the box body. The top of the box cover is a split box top. The two ends of the box top are respectively hinged to the two ends of the top of the box cover. A stepped buckle that cooperates with each other is arranged at the connection of the box top. A sealing ring is also arranged between the box cover and the box top. Both the box body and the box cover are made of metal. By setting a cuboid drying box, the present invention replaces the cylindrical drying box adopted in the national standard GB / T 36495-2018 "Test Methods for Physical Properties of Raw Materials for Sintered Bricks and Tiles" in the traditional situation, increases the heat receiving area of the sample, improves the drying efficiency, opens the box top during drying, closes the box top after drying is completed, and is completely sealed through the stepped buckle and the sealing ring to isolate the moisture in the air from the dried sample, ensuring the accuracy of subsequent test results.

[0012] The above-mentioned method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products is characterized in that, in step two, the drying oven is equipped with a weighing tray with a precision of 0.01 g. By setting a weighing tray in the drying oven in the present invention, the moisture change of the sample is dynamically monitored during the drying process, achieving the purpose of quickly testing the moisture content.

[0013] It should be noted that the drying oven is equipped with three weighing trays to weigh three samples respectively.

[0014] The above-mentioned method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products is characterized in that, in step two, the drying temperature is 100°C to 110°C, and the weight of the sample remains unchanged continuously within 30 min during drying, which means the drying is complete. By controlling the drying temperature in the present invention, the moisture in the sample is fully removed, and by controlling the drying process, an accurate moisture content is obtained, which helps to obtain sintered products with excellent quality.

[0015] The above-mentioned method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products is characterized in that, in step two, the drying process is as follows: open the box top to allow moisture to escape from the top. After drying is completed, close the box top through the pull rod on the drying oven, then take out the drying box from the drying oven, put it into a small air-conditioning box, place a desiccant in the air-conditioning box, set the temperature in the air-conditioning box to room temperature, quickly cool the dried sample to room temperature, weigh the dried sample and the drying box together, and calculate the moisture content. In the present invention, during drying, the box top is opened to allow moisture to escape from the top. After drying is completed, the box top is closed first and then the drying box is taken out of the drying oven to prevent moisture absorption. By quickly cooling to room temperature in the air-conditioning box, the accuracy of subsequent tests is ensured.

[0016] It should be noted that pull rods for closing the box top are arranged on both sides of the drying oven.

[0017] The above method for rapid multi - feature analysis of construction waste soil and matching of raw materials for preparing sintered products is characterized in that the process of grinding and screening in step three is as follows: The No. 1 dried sample is screened by a centrifugal small - scale screening machine with a screen hole diameter of 40 μm. The over - size material is put into a three - head automatic grinding machine for grinding and then screened continuously until all of it passes through the screen. The No. 2 dried sample is screened by a centrifugal small - scale screening machine with a screen hole diameter of 2 mm. The over - size material is put into a three - head automatic grinding machine for grinding and then screened continuously until all of it passes through the screen. The No. 3 dried sample is screened by a centrifugal small - scale screening machine with a screen hole diameter of 1 mm. The over - size material is put into a three - head automatic grinding machine for grinding and then screened continuously until all of it passes through the screen. The present invention obtains dried samples with different particle sizes by controlling the process of grinding and screening, which is suitable for XRD experiments, XRF tests and heavy metal analysis respectively, ensuring the accuracy of test results.

[0018] The above method for rapid multi - feature analysis of construction waste soil and matching of raw materials for preparing sintered products is characterized in that when the sand and gravel content of the construction waste soil obtained in step four is greater than 10%, the construction waste soil is screened for sand and gravel, and the particle size of the sand and gravel is greater than 0.075 mm. In the present invention, when the sand and gravel content is greater than 10%, the construction waste soil needs to be screened for sand and gravel to be suitable for the preparation of sintered products. The screened sand and gravel can be used as sand and gravel aggregates for concrete, and waste utilization is also realized.

[0019] The above method for rapid multi - feature analysis of construction waste soil and matching of raw materials for preparing sintered products is characterized in that the raw material matching in step seven is to match the construction waste soil or match the construction waste soil and other solid waste materials according to chemical composition and loss on ignition. In the present invention, for raw material matching, it means that the construction waste soil meeting the requirements of 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, and loss on ignition of 3% - 15% is directly used for the preparation of sintered products, or a combination of multiple construction waste soils that all meet the above requirements is used for the preparation of sintered products, or a combination of multiple construction waste soils meets the above requirements and then is used for the preparation of sintered products, or a combination of the construction waste soil that meets the above requirements and solid waste materials is used for the preparation of sintered products, or a combination of multiple construction waste soils and solid waste materials meets the above requirements and then is used for the preparation of sintered products, etc. The way of raw material matching is determined according to actual needs to solve the problem of rapid utilization of solid waste.

[0020] The above method for rapid multi - feature analysis of construction waste soil and matching of raw materials for preparing sintered products is characterized in that in step seven, the solid waste material database is classified according to different regions. In the present invention, the solid waste material database is classified according to different regions, so as to match the construction waste soil and solid waste materials in similar regions, thus saving transportation costs and improving production efficiency.

[0021] The present invention has the following advantages compared with the prior art: 1. In the present invention, through multi - feature synchronous analysis means, the construction waste soil is weighed and sampled, and multiple features such as the moisture content, mineral composition, chemical composition, loss on ignition, heavy metal content, particle composition, and sand and gravel content of the construction waste soil are rapidly analyzed to obtain the data of the construction waste soil, realizing rapid and accurate multi - feature analysis of the construction waste soil.

[0022] 2. For the matching of raw materials for preparing sintered products in the present invention, first, based on the sand and gravel content, it is judged whether sand and gravel aggregates can be extracted. Then, based on the chemical composition and loss on ignition, the construction waste soil is statistically analyzed under multiple conditions to obtain the data of the construction waste soil, and combined with other solid waste materials to obtain the solid waste material database. Thus, the raw materials of the solid waste material database are matched to meet the requirements for preparing sintered products, realizing the precise utilization and rapid matching of the construction waste soil, and improving the utilization efficiency of the construction waste soil.

[0023] 3. When matching raw materials in the present invention, the construction waste soil that meets the requirements is directly used for preparing sintered products, or multiple construction waste soils that all meet the above requirements are combined for preparing sintered products, or multiple construction waste soils are combined to meet the above requirements for preparing sintered products, or the construction waste soil that meets the above requirements is combined with solid waste materials for preparing sintered products, or multiple construction waste soils and solid waste materials are combined to meet the above requirements for preparing sintered products, etc. The way of raw material matching is determined according to actual needs to solve the problem of rapid utilization of solid waste.

[0024] 4. In the present invention, the solid waste material database is classified according to different regions, so as to match the construction waste soil and solid waste materials in similar regions, thus saving transportation costs and improving production efficiency.

[0025] 5. Aiming at the resource - based reuse of construction waste soil, the present invention develops a method for rapid multi - feature analysis of construction waste soil and matching of raw materials for preparing sintered products. It can not only rapidly analyze the basic characteristics of construction waste soil, but also quickly find the best - matching raw materials. Moreover, the raw materials for sintered products are all solid waste materials, which is of great significance in terms of environmental protection, technology, economy, etc.

[0026] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0027] Figure 1 It is a flowchart of a method for rapid multi - feature analysis of engineering muck and matching of raw materials for preparing sintered products of the present invention.

[0028] Figure 2 It is a schematic structural diagram of the drying box of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the opened drying box of the present invention.

[0030] Figure 4 It is a schematic structural diagram of the stepped buckle of the drying box of the present invention.

[0031] Figure 5 It is a schematic diagram of the positional relationship between the side of the drying oven and the push rod of the present invention.

[0032] Figure 6 It is a schematic diagram of the positional relationship between the drying box and the drying oven of the present invention.

[0033] Figure 7 It is a schematic diagram of the positional relationship between the push rod, the drying box and the drying oven of the present invention.

[0034] Figure 8 It is a result diagram of the particle size distribution test of the shield muck of the subway in Shaanxi in Example 1 of the present invention.

[0035] Description of the reference numerals: 1 - box body; 2 - box cover; 3 - box top; 4 - buckle; 5 - sealing ring; 6 - drying oven; 7 - push rod; 8 - weighing tray. Detailed Embodiments

[0036] Figure 1 It is a flowchart of a method for rapid multi - feature analysis of engineering muck and matching of raw materials for preparing sintered products of the present invention. It can be seen from Figure 1 that the present invention dries the engineering muck to obtain the moisture content, then grinds and sieves it, and conducts XRD tests, XRF tests and heavy metal tests respectively to obtain the mineral composition, chemical composition, loss on ignition and heavy metal content of the engineering muck. According to the obtained chemical composition and loss on ignition, statistics are carried out, and combined with the particle size distribution test of the engineering muck, the particle composition and sand content of the engineering muck are obtained to get the data of the engineering muck. The chemical composition and loss on ignition of other solid waste materials are statistically analyzed according to the unit in step five, and combined with the mineral composition and heavy metal content of other solid waste materials and the data of the engineering muck obtained in step six, a solid waste material database is obtained. According to the chemical composition and loss on ignition in the solid waste material database, raw material matching is carried out, and then sintered products are prepared.

[0037] Figure 2 This is a schematic structural view of the drying box of the present invention. Figure 3 This is a schematic structural view of the opened drying box of the present invention. Figure 4 This is a schematic structural view of the stepped buckle of the drying box of the present invention. As can be seen from Figures 2 to 4 it, the drying box includes a cuboid box body 1 and a box cover 2 that matches the box body 1. The top of the box cover 2 is a split box top 3. Both ends of the box top 3 are hinged to both ends of the top of the box cover 2. A stepped buckle 4 that cooperates with each other is provided at the connection of the box top 3. A sealing ring 5 is also provided between the box cover 2 and the box top 3. Both the box body 1 and the box cover 2 are made of metal materials.

[0038] Figure 5 This is a schematic view of the positional relationship between the side of the drying oven of the present invention and the push rod. Figure 6 This is a schematic view of the positional relationship between the drying box and the drying oven of the present invention. Figure 7 This is a schematic view of the positional relationship among the push rod, the drying box and the drying oven of the present invention. As can be seen from Figures 5 to 7 it, three weighing trays 8 are provided in the drying oven 6. One drying box is placed on each of the three weighing trays 8. A square push rod 7 is provided on the side of the drying oven 6. Half of the square push rod 7 is located inside the drying oven 6 and half is located outside the drying oven 6, and it is slidably sealed with the drying oven 6. The square push rod 7 closes the box tops 3 of the three drying boxes at one time.

[0039] Embodiment 1 This embodiment includes the following steps: Step 1: Weigh and sample the shield muck of the Shaanxi subway, and obtain 3 samples, which are respectively recorded as Sample No. 1, Sample No. 2 and Sample No. 3, and their masses are 8 g, 10 g and 18 g respectively; Step 2: Put the 3 samples obtained in Step 1 into 3 drying boxes respectively, and then dry them in the drying oven. The drying temperature is 100°C to 110°C. Open the box tops of the drying boxes so that the moisture escapes from the top. When the weight of the sample remains unchanged for 30 consecutive minutes, it is completely dried. After drying, close the box tops, take the drying boxes out of the drying oven, put them into a small air-conditioning box, and place desiccants in the air-conditioning box. Set the temperature in the air-conditioning box to room temperature, quickly cool the dried samples to room temperature. Weigh the dried samples and the drying boxes together to obtain 3 dried samples, and obtain the moisture content of the shield muck of the Shaanxi subway, as shown in Table 1; The drying oven is equipped with a weighing tray with an accuracy of 0.01 g; Step 3: Put the 3 dried samples obtained in Step 2 into 3 centrifugal small screening machines for grinding and screening, and then conduct XRD tests, XRF tests, and heavy metal tests respectively to obtain the mineral composition of the shield muck from the subway in Shaanxi, as shown in Table 3, the chemical composition, as shown in Table 2, the loss on ignition, as shown in Table 2, and the heavy metal content, as shown in Table 3; the process of grinding and screening is as follows: Screen the No. 1 dried sample with a centrifugal small screening machine with a screen hole diameter of 40 μm, put the oversize material into a three-head automatic grinding machine for grinding and then continue screening until all pass through the screen; screen the No. 2 dried sample with a centrifugal small screening machine with a screen hole diameter of 2 mm, put the oversize material into a three-head automatic grinding machine for grinding and then continue screening until all pass through the screen; screen the No. 3 dried sample with a centrifugal small screening machine with a screen hole diameter of 1 mm, put the oversize material into a three-head automatic grinding machine for grinding and then continue screening until all pass through the screen; Step 4: Conduct a particle size distribution test on the shield muck from the subway in Shaanxi, as shown in Table 5 and Figure 8 , and obtain that the sand and gravel content of the shield muck from the subway in Shaanxi is 0; Figure 8 On the left horizontal axis in [Figure Name] represents the cumulative percentage, and the right horizontal axis represents the percentage; Step 5: According to the chemical composition and loss on ignition obtained in Step 3, statistically analyze the shield muck from the subway in Shaanxi according to the following units: (1) SiO2 < 50%; (2) SiO2 > 80%; (3) Al2O3 < 5%; (4) Al2O3 > 25%; (5) Fe2O3 < 2%; (6) Fe2O3 > 15%; (7) CaO > 15%; (8) MgO > 5%; (9) SO3 > 3%; (10) loss on ignition < 3%; (11) loss on ignition > 15%; (12) fully compliant unit, that is, 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, loss on ignition 3% - 15%; the contents in the units are all mass contents; it can be seen that the shield muck from the subway in Shaanxi belongs to the (12) fully compliant unit; Step 6: Based on the statistics in Step 5, the moisture content obtained in Step 2, the mineral composition and heavy metal content obtained in Step 3, and the particle composition and sand and gravel content obtained in Step 4, obtain the data of the shield muck from the subway in Shaanxi.

[0040] Table 1

[0041] Table 2

[0042] Table 3

[0043] Table 4

[0044] Table 5

[0045] In this embodiment, the masses of Sample No. 1, Sample No. 2, and Sample No. 3 can also be 5 g, 8 g, 15 g or 10 g, 15 g, 20 g respectively.

[0046] Example 2 The difference between this embodiment and Example 1 lies in testing the construction waste soil in Guizhou to obtain the chemical composition (see Table 7), loss on ignition (see Table 7), moisture content (see Table 6), mineral composition (see Table 8), heavy metal content (see Table 9), particle composition and sand content (see Table 10), and obtaining the data of the construction waste soil in Guizhou. The construction waste soil in Guizhou meets the requirement that (1) SiO2 < 50%.

[0047] Table 6

[0048] Table 7

[0049] Table 8

[0050] Table 9

[0051] Table 10

[0052] Example 3 The difference between this embodiment and Example 1 lies in testing the engineering soil waste in Zhejiang to obtain the chemical composition (see Table 12), loss on ignition (see Table 12), moisture content (see Table 11), mineral composition (see Table 13), heavy metal content (see Table 14), particle composition and sand content (see Table 15), and obtaining the data of the engineering soil waste in Zhejiang. The sand content in the sand and gravel waste soil in Guizhou is 18.36%. After screening the engineering soil waste in Zhejiang, it is used. The data of the engineering soil waste in Zhejiang meets the requirement that (10) the loss on ignition is less than 3%.

[0053] Table 11

[0054] Table 12

[0055] Table 13

[0056] Table 14

[0057] Table 15

[0058] Example 4 This example includes the following steps: Step 1: Obtain the data of the shield muck from the Shaanxi subway in Example 1 to get a solid waste material database. Match the raw materials according to the chemical composition and loss on ignition in the solid waste material database. Use the single shield muck from the Shaanxi subway as the raw material for sintered products, which meets the following conditions: 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, loss on ignition 3% - 15%, and then prepare the sintered products.

[0059] Example 5 This example includes the following steps: Step 1: Obtain the data of the shield muck from the Shaanxi subway in Example 1 and the data of other solid waste materials, namely the silt from the Lantian River in Shaanxi, to get a solid waste material database. Match the raw materials according to the chemical composition and loss on ignition in the solid waste material database. Use the shield muck from the Shaanxi subway and the silt from the Lantian River in Shaanxi as the raw materials for sintered products according to the region, which meets the following conditions: 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, loss on ignition 3% - 15%, and then prepare the sintered products.

[0060] The chemical composition of the silt from the Lantian River in Shaanxi is shown in Table 17, the loss on ignition is shown in Table 17, the moisture content is shown in Table 16, the mineral composition is shown in Table 18, the heavy metal content is shown in Table 19, the particle composition and sand content are shown in Table 20, to obtain the data of the silt from the Lantian River in Shaanxi; the silt from the Lantian River in Shaanxi belongs to (12) all - conforming units.

[0061] Table 16

[0062] Table 17

[0063] Table 18

[0064] Table 19

[0065] Table 20

[0066] Example 6 This example includes the following steps: Step 1: Obtain the data of Guizhou construction waste soil obtained in Example 2 and the data of other solid waste materials, Guizhou sand and waste soil, to obtain a solid waste material database. Perform raw material matching according to the chemical composition and loss on ignition in the solid waste material database. Use Guizhou construction waste soil and Guizhou sand and waste soil with a mass ratio of 0 - 0.9565:0.0435 - 1 as raw materials for sintered products according to the region. It meets the following conditions: 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, loss on ignition 3% - 15%, and then prepare sintered products.

[0067] The chemical composition of Guizhou sand and waste soil is shown in Table 22, the loss on ignition is shown in Table 22, the moisture content is shown in Table 21, the mineral composition is shown in Table 23, the heavy metal content is shown in Table 24, the particle composition and sand content are shown in Table 25, to obtain the data of Guizhou sand and waste soil. The data of Guizhou sand and waste soil conforms to (2) SiO2 > 80%.

[0068] Table 21

[0069] Table 22

[0070] Table 23

[0071] Table 24

[0072] Table 25

[0073] Example 7 This example includes the following steps: Step 1: Obtain the data of Zhejiang engineering waste soil obtained in Example 3 and the data of other solid waste materials, Zhejiang dried sludge, to obtain a solid waste material database. Perform raw material matching according to the chemical composition and loss on ignition in the solid waste material database. Use Zhejiang engineering waste soil and Zhejiang dried sludge with a mass ratio of 0.7513 - 0.978:0.022 - 0.2487 as raw materials for sintered products according to the region. It meets the following conditions: 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, loss on ignition 3% - 15%, and then prepare sintered products.

[0074] The chemical composition of the dried sludge in Zhejiang is shown in Table 27, the loss on ignition is shown in Table 27, the moisture content is shown in Table 26, the mineral composition is shown in Table 28, the heavy metal content is shown in Table 29, the particle composition and sand content are shown in Table 30. The data of the dried sludge in Zhejiang are obtained. The data of the dried sludge in Zhejiang meet the following requirements: (1) SiO2 < 50%; (9) SO3 > 3%; (11) the loss on ignition is greater than 15%.

[0075] Table 26

[0076] Table 27

[0077] Table 28

[0078] Table 29

[0079] Table 30

[0080] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes and equivalent variations made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for rapid multi-feature analysis of engineering muck and matching of raw materials for preparing sintered products, characterized in that, The method comprises the following steps: Step 1: Weigh and sample the construction waste soil to obtain three samples; Step 2: The three samples obtained in step 1 are placed in three drying boxes respectively, and then dried in a drying oven to obtain three dried samples, and the moisture content of the construction waste soil is obtained; Step 3: The three dried samples obtained in step 2 were placed in three small centrifugal screening machines for grinding and screening, and then subjected to XRD testing, XRF testing, and heavy metal testing to obtain the mineral composition, chemical composition, ignition loss, and heavy metal content of the engineering slag; Step 4: Conduct a particle size distribution test on the construction waste soil to obtain the particle composition and sand and gravel content of the construction waste soil; Step 5. The chemical composition and ignition loss of the construction waste obtained in step 3 are statistically analyzed according to the following units: (1) SiO2 < 50%; (2) SiO2 > 80%; (3) Al2O3 < 5%; (4) Al2O3 > 25%; (5) Fe2O3 < 2%; (6) Fe2O3 > 15%; (7) CaO > 15%; (8) MgO > 5%; (9) SO3 > 3%; (10) ignition loss less than 3%; (11) ignition loss greater than 15%; (12) all units meet the requirements, i.e., 50% ≤ SiO2 ≤ 80%, 5% ≤ Al2O3 ≤ 25%, 2% ≤ Fe2O3 ≤ 15%, CaO ≤ 15%, MgO ≤ 5%, SO3 ≤ 3%, ignition loss 3% to 15%; the contents in the units are all mass contents; Step 6: Obtain data on the construction waste soil based on the statistics in step 5, the moisture content obtained in step 2, the mineral composition and heavy metal content obtained in step 3, and the particle composition and sand and gravel content obtained in step 4; Step 7: The chemical composition and loss on ignition of other solid waste materials are statistically analyzed according to the units in step 5, and the mineral composition and heavy metal content of other solid waste materials and the data of the construction waste soil obtained in step 6 are combined to obtain a solid waste material database. The construction waste soil and other solid waste materials are matched according to the chemical composition and loss on ignition in the solid waste material database to meet the following conditions: 50%≤SiO2≤80%, 5%≤Al2O3≤25%, 2%≤Fe2O3≤15%, CaO≤15%, MgO≤5%, SO3≤3%, and loss on ignition 3%~15%, and then sintered products are prepared.

2. The method for rapid analysis of multiple features of construction waste and matching raw materials for preparing sintered products according to claim 1 is characterized in that: The three samples described in step 1 are respectively recorded as sample No. 1, sample No. 2 and sample No. 3, and their masses are 5g~10g, 8g~15g and 15g~20g respectively.

3. The method for rapid multi-feature analysis of construction waste and matching raw materials for preparing sintered products according to claim 1 is characterized in that: The drying box in step 2 includes a rectangular box body and a box cover matching the box body. The top of the box cover is a split-open box top. The two ends of the box top are hinged to the two ends of the top of the box cover respectively. The connection between the box tops is provided with mutually matching stepped buckles. A sealing ring is also provided between the box cover and the box top. The box body and the box cover are both made of metal.

4. A method for rapid multi-feature analysis of engineering muck and matching of raw materials for preparing sintered products according to claim 1, characterized in that, The drying oven described in step 2 is equipped with a weighing tray with an accuracy of 0.01g.

5. A method for rapid multi-feature analysis of engineering muck and matching of raw materials for preparing sintered products according to claim 1, characterized in that In Step 2, the drying temperature is 100°C to 110°C. When the weight of the sample remains unchanged within 30 consecutive minutes during drying, the drying is complete.

6. The method for rapid multi-feature analysis of construction waste soil and matching of raw materials for preparing sintered products according to claim 3, characterized in that, The drying process in Step 2 is as follows: Open the top of the box to allow moisture to escape from the top. After drying is completed, close the top of the box through the pull rod on the drying oven, then take out the drying box from the drying oven, place it in a small air-conditioning box, and place desiccant in the air-conditioning box. Set the temperature in the air-conditioning box to room temperature, quickly cool the dried sample to room temperature, weigh the dried sample and the drying box together at room temperature, and calculate the moisture content.

7. A method for rapid multi-feature analysis of construction waste and matching of raw materials for preparing sintered products according to claim 1, characterized in that The process of grinding and sieving in Step 3 is as follows: Screen the No. 1 dried sample using a centrifugal small sieve with a screen hole diameter of 40 μm. Put the oversize material into a three-head automatic grinder for grinding and then continue sieving until all of it passes through the sieve. Screen the No. 2 dried sample using a centrifugal small sieve with a screen hole diameter of 2 mm. Put the oversize material into a three-head automatic grinder for grinding and then continue sieving until all of it passes through the sieve. Screen the No. 3 dried sample using a centrifugal small sieve with a screen hole diameter of 1 mm. Put the oversize material into a three-head automatic grinder for grinding and then continue sieving until all of it passes through the sieve.

8. The method for rapid analysis of multiple features of construction waste and matching raw materials for preparing sintered products according to claim 1 is characterized in that: When the sand and gravel content of the construction waste soil obtained in Step 4 is greater than 10%, conduct sand and gravel screening on the construction waste soil. The particle size of the sand and gravel is greater than 0.075 mm.

9. A method for rapid multi - feature analysis of engineering soil and matching of raw materials for preparing sintered products according to claim 1, characterized in that, The raw material matching in Step 7 is to match the construction waste soil or match the construction waste soil and other solid waste materials according to the chemical composition and loss on ignition.

10. A method for rapid multi-feature analysis of engineering soil and matching of raw materials for preparing sintered products according to claim 1, characterized in that The solid waste material database in Step 7 is classified according to different regions.

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