High-dosage industrial waste residue cement mineralizer and preparation method thereof

Abstract

The invention belongs to the technical field of cement additives, and discloses a high-dosage industrial waste residue cement mineralizer which comprises bio-based alcohol amine, molasses, ammonium bisulfate, sodium alpha-olefin sulfonate, aluminum formate and water. The invention also discloses a preparation method of the high-volume industrial waste residue cement mineralizer, which comprises the following steps: firstly, adding aluminum formate into water and stirring; and then, adding bio-based alcohol amine, molasses, ammonium bisulfate and sodium alpha-olefin sulfonate, and mixing and stirring to obtain the cement mineralizer. The cement mineralizer is applied to a cement grinding section of cement production, is beneficial to excitation of early hydration activity of cement and mixed materials, and particularly has a remarkable effect on excitation of 3d strength.

Description

Technical Field

[0001] The present invention belongs to the technical field of cement additives, and particularly relates to a high-amount industrial waste residue cement mineralizer and a preparation method thereof. Background Art

[0002] The cement industry is a high-energy-consuming industry, with a comprehensive energy consumption of 765 kWh / ton, and the energy consumption of the product grinding section is 34 kWh / ton. In order to save energy and reduce production costs in cement production, industrial solid waste admixtures such as fly ash, smelting waste residue, and limestone tailings are added during the cement grinding process. Under the induction of cement hydration and the excitation of grinding mineralization, these admixtures can hydrate and harden, but the strength development is relatively slow. They do not participate in the hydration reaction at 3 days, and can partially hydrate and harden at 28 days, exerting a certain strength. Some mineral components take several years to complete hydration and hardening, so the strength development of cement with a high admixture content of admixtures is relatively slow. This results in a situation where sometimes the 28-day strength of cement enterprises meets the requirements of GB175-2023 "Common Portland Cement", but the 3-day strength is unqualified. Summary of the Invention

[0003] An object of the present invention is to provide a high-amount industrial waste residue cement mineralizer for stimulating the early hydration activity of cement and admixtures, which is specifically composed of the following components in parts by weight: 14-16 parts of bio-based alkanolamine, 9-11 parts of molasses, 9-11 parts of ammonium bisulfate, 4-6 parts of α-olefin sulfonate, 4-6 parts of aluminum formate, and 55 parts of water.

[0004] Preferably, it is 15 parts of bio-based alkanolamine, 10 parts of molasses, 10 parts of ammonium bisulfate, 5 parts of α-olefin sulfonate, 5 parts of aluminum formate, and 55 parts of water.

[0005] Preferably, the bio-based alkanolamine includes monoethanolamine, diethanolamine, triethanolamine, and isopropanolamine.

[0006] Another object of the present invention is to provide a preparation method of a high-amount industrial waste residue cement mineralizer for preparing the above cement mineralizer, which includes the following steps: Add aluminum formate to water and stir for 5-8 minutes; Add bio-based alkanolamine, molasses, ammonium bisulfate, and α-olefin sulfonate, and mix and stir for 10-15 minutes to obtain the cement mineralizer.

[0007] Apply the above high-amount industrial waste residue cement mineralizer to the cement grinding section of cement production. Specifically, 0.9-1.1 kg of the cement mineralizer is added dropwise per ton of cement.

[0008] The present invention has the following beneficial effects.

[0009] The high-loading industrial waste residue cement mineralizer provided by the present invention improves the early strength of cement through two ways. The first way is to improve the early strength by increasing the fineness of cement. The batching scheme uses bio-based alkanolamines, whose main components include complex mixtures containing hydroxyl and amino groups such as monoethanolamine, diethanolamine, triethanolamine, and isopropanolamine, which have the characteristics of low cost and excellent surfactant properties, and have a significant grinding aid effect during the cement grinding process. Sodium α-olefin sulfonate can eliminate static electricity, reduce agglomeration, and has a good grinding aid effect. The increase in cement fineness is beneficial to the exertion of early hydration activity and can significantly improve the 3-day strength. The second way is that the batching adopts the synergistic superposition effect of bio-based alkanolamines, molasses, ammonium bisulfate, sodium α-olefin sulfonate, and aluminum formate components, which can stimulate the early hydration activity of cement and admixtures, especially having a significant effect on stimulating the 3-day early strength. After adding the mineralizer, the age strength can be increased by more than 10%, which can be increased by 3 - 4 Mpa, and both the 3-day strength and the 28-day strength can stably meet the strength requirements specified in GB175-2023 "Common Portland Cement". Specific Embodiments

[0010] In order to make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail through the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0011] A high-loading industrial waste residue cement mineralizer is composed of the following components in parts by weight: 14 - 16 parts of bio-based alkanolamines, 9 - 11 parts of molasses, 9 - 11 parts of ammonium bisulfate, 4 - 6 parts of sodium α-olefin sulfonate, 4 - 6 parts of aluminum formate, and 55 parts of water. Preferably, it is 15 parts of bio-based alkanolamines, 10 parts of molasses, 10 parts of ammonium bisulfate, 5 parts of sodium α-olefin sulfonate, 5 parts of aluminum formate, and 55 parts of water.

[0012] The present invention provides a preparation method of a high-loading industrial waste residue cement mineralizer for preparing the above-mentioned high-loading industrial waste residue cement mineralizer, which specifically includes the following steps: First, add aluminum formate to water and stir for 5 - 8 minutes; Then, add bio-based alkanolamines, molasses, ammonium bisulfate, and sodium α-olefin sulfonate to it and stir for 10 - 15 minutes; Finally, after mixing evenly, the cement mineralizer can be obtained.

[0013] The present invention also provides an application of a high-loading industrial waste residue cement mineralizer. The above-mentioned high-loading industrial waste residue cement mineralizer is applied to the cement grinding section of cement production. Specifically, 0.9 - 1.1 kg of the cement mineralizer is added dropwise to each ton of cement.

[0014] The production ratio of cement is: cement clinker: 760 kg, fly ash: 100 kg, slag: 40 kg, limestone: 50 kg, gypsum: 50 kg.

[0015] Example 1 Cement clinker: 760 kg, fly ash: 100 kg, slag: 40 kg, limestone: 50 kg, gypsum: 50 kg. Add 0.9 kg of cement mineralizer per ton of cement.

[0016] The mineralizer includes bio-based alkanolamine with a weight fraction of 14 parts, molasses with a weight fraction of 11 parts, ammonium bisulfate with a weight fraction of 11 parts, α-olefin sulfonate with a weight fraction of 4 parts, aluminum formate with a weight fraction of 5 parts, and water with a weight fraction of 55 parts.

[0017] The mineralizer is proportioned and prepared by weight as follows: Add aluminum formate to water and stir for 6 minutes; then add bio-based alkanolamine, molasses, ammonium bisulfate, and α-olefin sulfonate, and stir for 15 minutes.

[0018] Example 2 Cement clinker: 760 kg, fly ash: 100 kg, slag: 40 kg, limestone: 50 kg, gypsum: 50 kg. Add 1.1 kg of cement mineralizer per ton of cement.

[0019] The mineralizer includes bio-based alkanolamine with a weight fraction of 14 parts, molasses with a weight fraction of 11 parts, ammonium bisulfate with a weight fraction of 11 parts, α-olefin sulfonate with a weight fraction of 4 parts, aluminum formate with a weight fraction of 5 parts, and water with a weight fraction of 55 parts.

[0020] Preparation of the mineralizer: Add aluminum formate to water and stir for 6 minutes; then add bio-based alkanolamine, molasses, ammonium bisulfate, and α-olefin sulfonate, and stir for 15 minutes.

[0021] Example 3 Cement clinker: 760 kg, fly ash: 100 kg, slag: 40 kg, limestone: 50 kg, gypsum: 50 kg. Add 0.9 kg of cement mineralizer per ton of cement.

[0022] The mineralizer includes bio-based alkanolamine with a weight fraction of 16 parts, molasses with a weight fraction of 10 parts, ammonium bisulfate with a weight fraction of 9 parts, α-olefin sulfonate with a weight fraction of 6 parts, aluminum formate with a weight fraction of 4 parts, and water with a weight fraction of 55 parts.

[0023] Preparation of the mineralizer: Add aluminum formate to water and stir for 6 minutes; then add bio-based alkanolamine, molasses, ammonium bisulfate, and α-olefin sulfonate, and stir for 15 minutes.

[0024] Example 4 Cement clinker: 760 kg, fly ash: 100 kg, slag: 40 kg, limestone: 50 kg, gypsum: 50 kg. 1.1 kg of cement mineralizer is added per ton of cement.

[0025] The mineralizer includes 16 parts by weight of bio-based alkanolamine, 10 parts by weight of molasses, 9 parts by weight of ammonium bisulfate, 6 parts by weight of α-olefin sulfonate, 4 parts by weight of aluminum formate, and 55 parts by weight of water.

[0026] Preparation of mineralizer: Add aluminum formate to water and stir for 6 min; then add bio-based alkanolamine, molasses, ammonium bisulfate, and α-olefin sulfonate thereto and stir for 15 min.

[0027] Example 5 Cement clinker: 760 kg, fly ash: 100 kg, slag: 40 kg, limestone: 50 kg, gypsum: 50 kg. 1 kg of cement mineralizer is added per ton of cement.

[0028] The mineralizer includes 14 parts by weight of bio-based alkanolamine, 9 parts by weight of molasses, 11 parts by weight of ammonium bisulfate, 5 parts by weight of α-olefin sulfonate, 6 parts by weight of aluminum formate, and 55 parts by weight of water.

[0029] Preparation of mineralizer: Add aluminum formate to water and stir for 6 min; then add bio-based alkanolamine, molasses, ammonium bisulfate, and α-olefin sulfonate thereto and stir for 15 min.

[0030] Example 6 Cement clinker: 760 kg, fly ash: 100 kg, slag: 40 kg, limestone: 50 kg, gypsum: 50 kg. 1 kg of cement mineralizer is added per ton of cement.

[0031] The mineralizer includes 14 parts by weight of bio-based alkanolamine, 9 parts by weight of molasses, 11 parts by weight of ammonium bisulfate, 5 parts by weight of α-olefin sulfonate, 6 parts by weight of aluminum formate, and 55 parts by weight of water.

[0032] Preparation of mineralizer: Add aluminum formate to water and stir for 6 min; then add bio-based alkanolamine, molasses, ammonium bisulfate, and α-olefin sulfonate thereto and stir for 15 min.

[0033] Example 7 Cement clinker: 760 kg, fly ash: 100 kg, slag: 40 kg, limestone: 50 kg, gypsum: 50 kg. No mineralizer is added during the grinding process. The strength at the age of 3 days is 18.2 Mpa in compressive strength, and the strength at 28 days is 44.5 Mpa in compressive strength.

[0034] The cement obtained by the method example of the present invention above is tested according to GB175-2023 "Common Portland Cement". The test results are shown in Table 1.

[0035] Table 1: Test results of cement technical indicators Project Ordinary Portland Cement 42.5 Grade GB175-2023 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Fineness, residue on 45μm sieve, % ≥5 13 12 12 12 11 10 Compressive strength at 3d, Mpa ≥17 23.91 24.20 22.70 23.58 24.06 23.83 Compressive strength at 28d, Mpa ≥42.5 48.52 46.76 47.62 47.36 46.12 46.72 Soundness Qualified Qualified Qualified Qualified Qualified Qualified Qualified It can be seen from the test data in Table 1 that the admixture content of the cement is 19%. Compared with Example 7 without adding a mineralizer, after adding a mineralizer in Examples 1-6, the 3-day and 28-day strengths of the cement both meet the specified values and the requirements of the surplus coefficient in GB175-2023 "Common Portland Cement". Thus, the industry technical problem of low 3-day strength of cement under the condition of high admixture of industrial waste residue can be solved. At the same time, the strength development after 3 days is normal, the 28-day strength value meets the national standard requirements, and there is no problem of shrinkage in the later stage due to the use of a mineralizer. The later strength increases relatively high, which is more beneficial to the stability and durability of the cement hardened body.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-dosage industrial waste slag cement mineralizer, characterized in that: The invention is composed of the following components in parts by weight: 14-16 parts of bio-based alcohol amine, 9-11 parts of molasses, 9-11 parts of ammonium hydrogen sulfate, 4-6 parts of sodium α-olefin sulfonate, 4-6 parts of aluminum formate and 55 parts of water.

2. The high-dosage industrial waste slag cement mineralizer according to claim 1, characterized in that: 15 parts of bio-based alcohol amine, 10 parts of molasses, 10 parts of ammonium hydrogen sulfate, 5 parts of sodium α-olefin sulfonate, 5 parts of aluminum formate, and 55 parts of water.

3. The high-dosage industrial waste slag cement mineralizer according to claim 1, characterized in that: Bio-based alcoholamines include monoethanolamine, diethanolamine, triethanolamine and isopropanolamine.

4. A method for preparing a high-dosage industrial waste slag cement mineralizer, used for preparing the cement mineralizer as claimed in any one of claims 1 to 4, characterized in that: The steps include: Add aluminum formate to water and stir for 5-8 minutes; Add bio-based alcohol amine, molasses, ammonium bisulfate and sodium α-olefin sulfonate and mix for 10-15 minutes.