Mineral admixture and strength detection method thereof

Abstract

The invention discloses a mineral admixture and a strength detection method thereof, and relates to the technical field of metallurgy, and the mineral admixture comprises the following chemical components in percentage by mass: 50-65% of CaO, 10-30% of SiO2, 2-6% of Al2O3, 3-8% of Fe2O3, 1-3% of MgO, 1-3% of Na2O and the balance of unavoidable impurities. By recycling the waste residues, the problems of high energy consumption, high emission, environmental pollution and the like in the iron and steel industry are effectively solved, and the green production cycle of iron and steel enterprises is realized. Meanwhile, the performance test of the mineral admixture is realized through small sample detection, so that the number of detection samples is reduced, and the detection cost is reduced while the performance detection is met.

Description

Technical Field

[0001] This invention relates to the field of metallurgical technology, and in particular to a mineral admixture and its strength testing method. Background Technology

[0002] With the rise of the concept of green smelting, the utilization of smelting waste gas and slag from steel plants has been widely promoted. The comprehensive utilization rate of iron slag from steel plants is about 22%. Its main mineral composition includes overburned tricalcium silicate and dicalcium silicate, olivine, rhodochrosite, and RO phase, etc. Its main uses are as road materials, engineering backfill materials, building materials, and fine grinding for cement admixtures and concrete additives. Preparing iron slag powder can also help steel plants solve the environmental pressure of "zero emissions" of iron slag. Therefore, promoting the comprehensive utilization and recycling of solid waste from steel metallurgy and achieving "solid waste leaving the plant" is an inevitable trend in the steel industry. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a mineral admixture and a method for testing its strength.

[0004] To solve the above technical problems, the technical solution of the present invention is as follows: A mineral admixture has the following chemical composition and mass percentage: CaO: 50-65%, SiO2: 10-30%, Al2O3: 2-6%, Fe2O3: 3-8%, MgO: 1-3%, Na2O: 1-3%, with the balance being unavoidable impurities.

[0005] As a preferred embodiment of the mineral admixture described in this invention, its chemical composition and mass percentage are as follows: CaO: 55-60%, SiO2: 12-28%, Al2O3: 3-5%, Fe2O3: 4-7%, MgO: 2-3%, Na2O: 1-2%, with the balance being unavoidable impurities.

[0006] As a preferred embodiment of the mineral admixture described in this invention, its chemical composition and mass percentage are as follows: CaO: 58-62%, SiO2: 15-20%, Al2O3: 4-5%, Fe2O3: 5-6%, MgO: 1-2%, Na2O: 2-3%, with the balance being unavoidable impurities.

[0007] This invention also provides a method for testing the strength of mineral admixtures, comprising: Mineral admixtures were used as the test samples. Use sandpaper to smooth the test surface of the sample to be tested; Place the test specimen at the test position and control the major axis of the test specimen to be perpendicular to the support surface. Apply an impulse to the test specimen until the specimen breaks and record the first impulse value when the specimen breaks. Place the sample to be tested in the compression fixture, apply an impulse to the sample until it breaks, and record the second impulse value when the sample breaks. The first impulse value and the second impulse value are compared with standard data to determine whether the sample to be tested meets the mechanical properties.

[0008] In a preferred embodiment of the strength testing method for the mineral admixture described in this invention, the step of placing the sample to be tested at the testing position, controlling the major axis of the sample to be tested to be perpendicular to the supporting surface, applying an impulse to the sample to be tested until the sample breaks, and recording the first impulse value at the time of sample breakage includes: Place the sample to be tested at the test position and control the major axis of the sample to be tested to be perpendicular to the support surface; Apply an impulse of 50±10 N / s to the specimen until it breaks, and record the first impulse value when the specimen breaks.

[0009] In a preferred embodiment of the strength testing method for the mineral admixtures of the present invention, the step of placing the sample to be tested in a compression fixture, applying an impulse to the sample until it breaks, and recording the second impulse value at the time of sample breakage includes: Place the sample to be tested inside the compression fixture; An impulse of 2400±200 N / s is applied to the test sample until the sample breaks, and the second impulse value at the time of sample breakage is recorded.

[0010] The beneficial effects of this invention are: (1) By reusing waste residue, this invention effectively solves the problems of high energy consumption, high emissions, and environmental pollution in the steel industry, and realizes green production cycle for steel enterprises.

[0011] (2) The present invention achieves performance testing of mineral admixtures by testing small samples, which reduces the number of test samples and reduces testing costs while meeting performance testing requirements. Detailed Implementation

[0012] To make the content of this invention easier to understand, the invention will be further described in detail below based on specific embodiments.

[0013] Example 1: This example provides a mineral admixture with the following chemical composition and mass percentage: CaO: 60%, SiO2: 15%, Al2O3: 4%, Fe2O3: 6%, MgO: 2%, Na2O: 2%, and the balance being unavoidable impurities.

[0014] This embodiment also provides a method for testing the strength of mineral admixtures, which specifically includes the following steps: Step S101: Take the mineral admixture as the sample to be tested.

[0015] Specifically, standard samples are taken from the mineral admixtures for sample preparation, molding, and demolding to obtain mineral admixture samples with representative performance.

[0016] Step S102: Use sandpaper to smooth the test surface of the sample to be tested.

[0017] Step S103: Place the test sample at the test position and control the long axis of the test sample to be perpendicular to the support surface. Apply an impulse to the test sample until the sample breaks and record the first impulse value when the sample breaks.

[0018] Specifically, first, the sample to be tested is placed at the testing position, and the major axis of the sample is controlled to be perpendicular to the support surface. Then, an impulse of 60 N / s is applied to the sample until it breaks, and the first impulse value at the time of breakage is recorded.

[0019] Step S104: Place the sample to be tested in the compression fixture, apply an impulse to the sample until it breaks, and record the second impulse value when the sample breaks.

[0020] Specifically, the sample to be tested is placed in a compression fixture, and then an impulse of 2600 N / s is applied to the sample until it breaks. The second impulse value at the time of sample breakage is recorded.

[0021] Step S105: Compare the first impulse value and the second impulse value with the standard data to determine whether the sample to be tested meets the mechanical properties.

[0022] Example 2: This example provides a mineral admixture with the following chemical composition and mass percentage: CaO: 58%, SiO2: 20%, Al2O3: 5%, Fe2O3: 5%, MgO: 1%, Na2O: 2%, with the balance being unavoidable impurities.

[0023] This embodiment also provides a method for testing the strength of mineral admixtures, which specifically includes the following steps: Step S101: Take the mineral admixture as the sample to be tested.

[0024] Specifically, standard samples are taken from the mineral admixtures for sample preparation, molding, and demolding to obtain mineral admixture samples with representative performance.

[0025] Step S102: Use sandpaper to smooth the test surface of the sample to be tested.

[0026] Step S103: Place the test sample at the test position and control the long axis of the test sample to be perpendicular to the support surface. Apply an impulse to the test sample until the sample breaks and record the first impulse value when the sample breaks.

[0027] Specifically, first, the sample to be tested is placed at the testing position, and the major axis of the sample is controlled to be perpendicular to the support surface. Then, an impulse of 40 N / s is applied to the sample until it breaks, and the first impulse value at the time of breakage is recorded.

[0028] Step S104: Place the sample to be tested in the compression fixture, apply an impulse to the sample until it breaks, and record the second impulse value when the sample breaks.

[0029] Specifically, the sample to be tested is placed in a compression fixture, and then an impulse of 2300 N / s is applied to the sample until it breaks. The second impulse value at the time of sample breakage is recorded.

[0030] Step S105: Compare the first impulse value and the second impulse value with the standard data to determine whether the sample to be tested meets the mechanical properties.

[0031] In addition to the above embodiments, the present invention may have other implementation methods; all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A mineral admixture, characterized in that: Its chemical composition and mass percentage are as follows: CaO: 50-65%, SiO2: 10-30%, Al2O3: 2-6%, Fe2O3: 3-8%, MgO: 1-3%, Na2O: 1-3%, with the balance being unavoidable impurities.

2. The mineral admixture according to claim 1, characterized in that: Its chemical composition and mass percentage are as follows: CaO: 55-60%, SiO2: 12-28%, Al2O3: 3-5%, Fe2O3: 4-7%, MgO: 2-3%, Na2O: 1-2%, with the balance being unavoidable impurities.

3. The mineral admixture according to claim 1, characterized in that: Its chemical composition and mass percentage are as follows: CaO: 58-62%, SiO2: 15-20%, Al2O3: 4-5%, Fe2O3: 5-6%, MgO: 1-2%, Na2O: 2-3%, with the balance being unavoidable impurities.

4. A method for testing the strength of a mineral admixture according to any one of claims 1 to 3, characterized in that: include: Mineral admixtures were used as the test samples. Use sandpaper to smooth the test surface of the sample to be tested; Place the test specimen at the test position and control the major axis of the test specimen to be perpendicular to the support surface. Apply an impulse to the test specimen until the specimen breaks and record the first impulse value when the specimen breaks. Place the sample to be tested in the compression fixture, apply an impulse to the sample until it breaks, and record the second impulse value when the sample breaks. The first impulse value and the second impulse value are compared with standard data to determine whether the sample to be tested meets the mechanical properties.

5. The method for testing the strength of mineral admixtures according to claim 4, characterized in that: The steps of placing the sample to be tested at the testing position, controlling the major axis of the sample to be tested to be perpendicular to the support surface, applying an impulse to the sample until it breaks, and recording the first impulse value at the moment of breakage include: Place the sample to be tested at the test position and control the major axis of the sample to be tested to be perpendicular to the support surface; Apply an impulse of 50±10 N / s to the specimen until it breaks, and record the first impulse value when the specimen breaks.

6. The method for testing the strength of mineral admixtures according to claim 4, characterized in that: The step of placing the sample to be tested in a compression fixture, applying an impulse to the sample until it breaks, and recording the second impulse value at the time of sample breakage includes: Place the sample to be tested inside the compression fixture; An impulse of 2400±200 N / s is applied to the test sample until the sample breaks, and the second impulse value at the time of sample breakage is recorded.