Method for determining the quantity of components in sintered clay bricks from gold tailings

Abstract

The application discloses a method for determining the quantity of components in gold tailing sintered clay bricks and mainly relates to the technical field of tailing sintered clay bricks. The method comprises the following steps: S1, determining the plasticity index of gold tailings and the plasticity index of clay; S2, calculating the plasticity index of sintered clay brick mixture; S3, setting multiple groups of mixing ratios, then calculating the plasticity indexes of sintered clay brick mixtures with different mixing ratios, and selecting the mixing ratio with the highest plasticity index; the method is simple and fast, can simplify complicated things, saves time and effort, saves working cost, and can promote the popularization and application of the gold tailing sintered clay brick technology.

Description

Technical Field

[0001] This invention relates to the field of tailings sintered clay brick technology, specifically a method for determining the component quantities in gold tailings sintered clay bricks. Background Technology

[0002] The main components of metal tailings are non-metallic minerals rich in resources such as SiO2, Al2O3, and CaCO3. They can be used to produce one or more building materials through existing mature processes. Currently, there are some mature technologies for producing building materials from tailings, such as tailings sintering clay brick technology, which has achieved breakthroughs in key technologies and processes and has become an effective technology for the large-scale utilization of tailings.

[0003] However, in the technology of tailings sintering clay bricks, there is still a technical challenge restricting the efficient utilization of tailings—determining the ratio of tailings to clay during the sintering process. Current production methods mostly rely on related technical tests to vaguely determine the ratio, or they select multiple different blending ratios for different mix proportions. First, several blending ratios are set, then strength tests are conducted on the mixtures with different blending ratios. After obtaining the strength results, the blending ratio that meets the strength requirements is determined based on the numerical values. This approach involves a large workload, complex testing procedures, long testing times, and is extremely time-consuming and labor-intensive, which to some extent hinders the efficient promotion and application of tailings sintering clay brick technology. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide a method for determining the component quantity in sintered clay bricks made from gold tailings. This method is simple, quick, and simplifies complex matters. At the same time, it saves time and effort, reduces operating costs, and can promote the application of sintered clay brick technology made from gold tailings.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A method for determining the component quantities in sintered clay bricks made from gold tailings, comprising the steps of:

[0007] S1. Determining the plasticity index (I) of gold tailings. P矿 Determining the plasticity index I of clay P粘 ;

[0008] S2. Calculate the plasticity index I of the sintered clay brick mixture. P混合 ;

[0009]

[0010] 55% ≥ M 矿 ≥25%;

[0011] 20>I P混合 >10;

[0012] I P混合 10 > 14;

[0013] Among them, M 矿 The mass percentage of gold tailings in sintered clay brick mixture, M 粘 This refers to the mass percentage of clay in the sintered clay brick mixture;

[0014] S3. Set multiple mixing ratios, and then calculate the plasticity index I of the sintered clay brick mixtures with different mixing ratios. P混合 Choose the blending ratio with the highest plasticity index.

[0015] Preferably, in step S1, when determining the plasticity index of gold tailings, the clay content C is first determined by particle analysis using a densitometer method. 矿 Then, I is obtained by interpolation. P矿 .

[0016] Preferably, in step S1, the plasticity index of clay is determined using a combined liquid limit and plastic limit tester.

[0017] Preferably, in step S2, M 矿 +M 粘 =1.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention breaks through the traditional, crude method of adjusting the tailings-to-clay blending ratio in the tailings sintering clay brick process. It creatively proposes first determining the plasticity index of both tailings and clay, and then, based on their respective plasticity indices and the optimal plasticity index range of the sintering mixture, more accurately determining the tailings-to-clay blending ratio. This method is highly efficient, low-cost, and produces high-quality bricks. It is simple and quick, simplifying a complex process. Simultaneously, it saves time and labor, reduces operating costs, and can promote the widespread application of gold tailings sintering clay brick technology. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0021] The strength of sintered clay bricks mixed with gold tailings depends on factors such as the properties of raw materials, the amount of water used in mixing, the sintering temperature, and the sintering time. The properties of raw materials are the main factor; high-strength bricks require raw materials to have a certain degree of plasticity so that they can be compacted and molded. At the same time, the plasticity cannot be too high, otherwise it will easily cause drying shrinkage cracks.

[0022] Meanwhile, in order to achieve large-scale utilization of gold tailings and dispose of as much tailings as possible, the tailings usage should be greater than 30%. To obtain sintered clay bricks with high strength that utilize large quantities of tailings, this invention proposes a simplified method for determining the blending ratio of gold tailings and clay.

[0023] Example 1: This invention is a method for determining the component quantity in sintered clay bricks made from gold tailings, particularly applicable to the determination of the tailings to clay component ratio when the tailings content is greater than 30% in the production of sintered clay bricks from various tailings materials such as gold tailings, iron tailings, tungsten tailings, and graphite tailings. The method includes the following steps:

[0024] 1) Based on GB / T 50123 "Standard for Geotechnical Testing Methods", GB 50021 "Code for Geotechnical Investigation", and GJ08-37 "Code for Geotechnical Investigation", the IP threshold or particle analysis result threshold corresponding to the fine-grained soil subclassification name is summarized as shown in Table 1.

[0025] Table 1. Fine-grained soil names and corresponding IP thresholds or clay thresholds.

[0026]

[0027] 2) Determine the plasticity index of tailings and clay respectively.

[0028] Tailings are sandy silt with very low plasticity. The combined liquid limit and plastic limit tester is prone to significant errors in determining the plasticity index. Therefore, to obtain the plasticity index I of tailings more accurately... P矿 The clay content (C) of tailings was determined by particle size analysis using a densitometer method. 矿 Then, I is obtained by interpolation. P矿 .

[0029] Example: C 矿 =8, then

[0030] Clay was tested using a combined liquid and plastic limit tester. P粘 The plasticity index of clay should be greater than 14. P粘 Sintered clay bricks made from a mixture of clay and tailings with a strength of <14 have too low strength.

[0031] 3) Determine the strength-plasticity index I of the tailings and clay mixture. P混合 The plasticity index of the clay-soil mixture for sintered clay bricks should meet the requirement of 20 > I. P混合 >10, within this range, the strength of the sintered clay bricks of the mixture increases with I P混合 The value increases as it increases.

[0032] Since the plasticity index is closely related to the clay content, I P混合 It can be calculated using the following formula:

[0033]

[0034] Among them, M 矿 The mass percentage of gold tailings in sintered clay brick mixture, M 粘 This refers to the mass percentage of clay in the sintered clay brick mixture;

[0035] Judgment criteria:

[0036] 55% ≥ M 矿 ≥25%;

[0037] 20>I P混合 >10;

[0038] I P混合 10 > 14;

[0039] This invention requires that the above three conditions be met simultaneously. It only requires measuring the plasticity index of tailings and clay, determining the technical feasibility of clay according to the judgment criteria, and then calculating the plasticity index of mixtures with different mixing ratios (e.g., 30, 35, 40, 45, 50, 55). Under the condition that the tailings content is greater than 25% and less than 55%, the plasticity index of the mixture is between 10 and 20. The mixing ratio with a higher plasticity index is selected.

[0040] Example 2: Given the plasticity index of a certain gold tailings and clay, the measured plasticity index of the mixture under different blending ratios is compared with the plasticity index calculated according to the calculation formula of this invention.

[0041] 1) I was measured using a combined liquid limit and plastic limit tester. P矿 =7.1%, I P粘 =20.6%.

[0042] 2) The blending ratio of gold tailings and clay is shown in Table 2 below. The measured plasticity index of the mixture under different ratios is shown in row 5 of Table 2.

[0043] 3) Calculate the I of the mixture according to the calculation formula proposed in this invention. P混合 As shown in row 6 of Table 2.

[0044] 4) Calculate the absolute value of the error between the calculated and measured plasticity index of the mineral-soil mixture:

[0045]

[0046] It can be seen that the absolute value of the error is less than 5% for all blending ratios, indicating that the method for calculating the plasticity index of the mixture proposed in this invention is feasible.

[0047] Table 2. Absolute values ​​of the error between the calculated and measured plasticity indices of mineral-earth mixtures.

[0048]

[0049] Example 3: Verification of clay type, dosage, and strength of sintered clay bricks from gold tailings in a certain area.

[0050] Table 3. Results of liquid limit and plastic limit determination and particle analysis of gold tailings and three different types of clay.

[0051]

[0052] According to the formula of this invention Calculate the plasticity index I of tailings P矿 =4.28%.

[0053] Strength tests were conducted on bricks fired at 950℃ according to GB / T5101 "Sintered Common Bricks" and GB / T 2542 "Test Methods for Masonry Bricks". The results are shown in Table 4.

[0054] Table 4 Strength Test of Sintered Clay Bricks from Gold Tailings

[0055]

[0056] Analyzing the data in the table, we can see that:

[0057] 1)I P混合 When the value is less than 10, the strength is generally low. P混合 The intensity drops sharply after it exceeds 20;

[0058] 2) The plasticity index of No. 3 clay is 11.25. When the tailings content is greater than 30%, the strength of all bricks is too low.

[0059] 3) The plasticity index of No. 1 clay is just over 14. When the tailings content is 35%, the highest strength is 13MPa. Several different contents can only meet the strength of sintered clay bricks of MU10 strength grade.

[0060] 4) No. 2 clay is a highly plastic clay. When the tailings content is greater than 50%, the strength decreases sharply. Therefore, the tailings content should not exceed 50%.

Claims

1. A method for determining the component quantities in sintered clay bricks made from gold tailings, characterized in that, Including the following steps: S1. Determining the plasticity index (I) of gold tailings. P矿 Determining the plasticity index I of clay P粘 ; S2. Calculate the plasticity index I of the sintered clay brick mixture. P混合 ; 55％≥M 矿 ≥25％； 20＞I P混合 ＞10； I P混合 10＞14； Among them, M 矿 The mass percentage of gold tailings in sintered clay brick mixture, M 粘 This refers to the mass percentage of clay in the sintered clay brick mixture; S3. Set multiple mixing ratios, and then calculate the plasticity index I of the sintered clay brick mixtures with different mixing ratios. P混合 Choose the blending ratio with the highest plasticity index.

2. The method for determining the component quantity in sintered clay bricks made from gold tailings according to claim 1, characterized in that, In step S1, when determining the plasticity index of gold tailings, the clay content C is first determined by particle analysis using a densitometer method. 矿 Then, I is obtained by interpolation. P矿 .

3. The method for determining the component quantity in sintered clay bricks made from gold tailings according to claim 1, characterized in that, In step S1, the plasticity index of clay is determined using a combined liquid limit and plastic limit tester.

4. The method for determining the component quantity in sintered clay bricks made from gold tailings according to claim 1, characterized in that, In step S2, M 矿 +M 粘 =1.

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