Electrolytic manganese slag / steel slag / slag-based grouting material and preparation method thereof

Abstract

The application provides an electrolytic manganese residue / steel residue / slag-based grouting material, which is made of the following raw materials in parts by weight: electrolytic manganese residue 10-50 parts, steel residue micro powder 20-60 parts, blast furnace slag micro powder 30 parts, alkaline activator 25-33.3 parts and water 100 parts. The application also provides a preparation method of the electrolytic manganese residue / steel residue / slag-based grouting material, which comprises the following steps: mixing the alkaline activator with water to obtain an alkaline activator solution; putting the electrolytic manganese residue, the steel residue micro powder and the blast furnace slag micro powder into a stirrer to uniformly stir and obtain mixed powder; and mixing and stirring the mixed powder with the alkaline activator solution to obtain the electrolytic manganese residue / steel residue / slag-based grouting material. The preparation process is simple, the cost is low, the heavy metal ions cannot be leached out in engineering application, the electrolytic manganese residue / steel residue / slag-based grouting material has good environmental safety and resource recycling advantages, and has a wide application prospect.

Description

Technical Field

[0001] This invention belongs to the field of engineering materials technology, specifically relating to an electrolytic manganese slag / steel slag / mineral slag-based grouting material and its preparation method. Background Technology

[0002] With the rapid advancement of my country's modern industrialization, the discharge of industrial waste has been increasing year by year. Among them, electrolytic manganese slag, steel slag, and blast furnace slag have high discharge volumes and low utilization rates. If these industrial wastes are not disposed of and utilized in a timely and effective manner to turn them into valuable resources, it will inevitably lead to serious resource waste and environmental pollution problems. Alkali-activated industrial waste composite material technology uses alkaline activators to activate the active components in the waste system, making them exhibit strong cementitious properties. This technology can not only fully utilize the residual value of industrial waste to reduce the consumption of natural resources, but also has a lower cost than traditional alkali-activated kaolin materials, thus having broad application prospects.

[0003] Industrial waste slag generally contains abundant SiO2, Al2O3, and CaO cementing components, and the cementing components in different waste slags exhibit varying activities due to differences in raw materials, smelting methods, and cooling methods. Electrolytic manganese slag is a solid waste generated during the electrolytic production of metallic manganese. Producing one ton of metallic manganese generates 10-12 tons of EMR, resulting in an annual increase of approximately 11 million tons of EMR. In recent decades, with the rapid development of the manganese industry, the accumulation of EMR in China has been astonishing, exceeding 150 million tons. Currently, there are no effective methods for EMR treatment; most EMR is directly moved to waste pits or open sites, posing environmental risks. Tens of millions of tons of electrolytic manganese slag consistently pose environmental safety hazards, seriously affecting the normal lives of local residents. Therefore, developing technologies for the safe treatment or utilization of EMR is urgently needed. Currently, a great deal of work has been done on the comprehensive treatment of EMR. Because the resource utilization of solid waste is the most ideal development direction, researchers have done much work to promote the utilization of EMR resources. Because EMR's mineral composition includes silica and gypsum, it has potential applications in building materials manufacturing. Steel slag, a major waste product of the steel industry, suffers from very low utilization due to its large fluctuations in chemical composition and poor reactivity. It is often used as an inert filler in concrete to improve its flowability and workability. Alkali-activated blast furnace slag composite cementitious materials possess excellent mechanical strength, but their rapid setting time and high fluidity loss over time result in poor workability. While adding retarders can effectively solve the rapid setting problem, it significantly impacts their strength. Furthermore, the high shrinkage of alkali-activated blast furnace slag composite cementitious materials also limits their application as a standalone cementitious powder. Industrial waste residues always have unsatisfactory problems when used alone. For example, it is almost impossible to prepare alkali-activated materials at room temperature using electrolytic manganese slag alone as a cementing powder; when blast furnace slag is used alone as a cementing powder, its fast setting time and high fluid loss over time result in poor workability; and when steel slag powder is used alone as a cementing powder, it cannot set and harden within the effective setting time.

[0004] To address the aforementioned problems, this invention provides an electrolytic manganese slag / steel slag / mineral slag-based grouting material and its preparation method. Summary of the Invention

[0005] The technical problem to be solved by this invention is to address the shortcomings of the prior art. The purpose of this invention is to provide an electrolytic manganese slag / steel slag / mineral slag-based grouting material with high early strength, continuous growth in later strength, long setting time, large and adjustable fluidity, and good durability. Another purpose of this invention is to provide a simple, low-cost, environmentally friendly, efficient, and resource-recycling method for preparing an electrolytic manganese slag / steel slag / mineral slag-based grouting material.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an electrolytic manganese slag / steel slag / blast furnace slag-based grouting material, which is made from the following raw materials in parts by weight: 10-50 parts of electrolytic manganese slag, 20-60 parts of steel slag powder, 30 parts of blast furnace slag powder, 25-33.3 parts of alkaline activator and 100 parts of water.

[0007] Preferably, the alkaline activator is sodium hydroxide, and the purity of the sodium hydroxide is ≥98.0%.

[0008] Preferably, the electrolytic manganese slag is electrolytic manganese slag that has undergone thermal activation treatment at 900℃ and has a density of 1.11 g / cm³. 3 The steel slag powder is a bright black, low-alkalinity steel slag powder with a calcium oxide content of less than 30% and a density of 1.72 g / cm³. 3 .

[0009] Preferably, the blast furnace slag powder is grade S95 with a density of 1.34 g / cm³. 3 .

[0010] A method for preparing the above-mentioned electrolytic manganese slag / steel slag / mineral slag-based grouting material is also provided, the method comprising the following steps:

[0011] S1. Add the alkaline activator to water and mix evenly to obtain an alkaline activator solution. Seal the solution with a polyethylene film and let it cool before use.

[0012] S2. Place the electrolytic manganese slag, steel slag powder and blast furnace slag powder into a mixer and mix evenly to obtain a mixed powder.

[0013] S3. Mix the mixed powder obtained in S2 with the alkaline activator solution obtained in S1, and then automatically stir according to the standard procedure to obtain electrolytic manganese slag / steel slag / mineral slag-based grouting material.

[0014] Preferably, the mixer speed in S2 is 140 r / min, and the mixing time is 3 min.

[0015] Preferably, the mass ratio of the mixed powder to the alkaline activator solution in S3 is (2-5):(1-3).

[0016] Preferably, the automatic stirring method according to the standard procedure in S3 is as follows: first, stir slowly at a rate of 140 r / min for 120 seconds, stop for 15 seconds, and then stir quickly at a rate of 285 r / min for 120 seconds, for a total stirring time of 255 seconds.

[0017] Working Principle: Electrolytic manganese slag, steel slag powder, and blast furnace slag powder all contain CaO. After hydration, they generate CSH, calcium vanadate, and CASH gel, which can provide early strength to the material. The active components SiO2 and Al2O3 in electrolytic manganese slag and blast furnace slag powder form an amorphous three-dimensional network of aluminosilicate gel under alkaline conditions, which can effectively promote the development of material strength. Steel slag powder has a low glass content and poor activity, which can adjust the setting time and fluidity of the composite cementitious material.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. This invention uses three industrial waste residues—electrolytic manganese slag, steel slag powder, and blast furnace slag powder—as the main raw materials to prepare composite grouting materials. It can effectively treat industrial solid waste, save a lot of energy and resources, reduce pollution, and open up an effective way for the comprehensive utilization of industrial waste residues.

[0020] 2. In this invention, when electrolytic manganese slag, steel slag powder, and blast furnace slag powder are used in combination, they can produce a superimposed effect: electrolytic manganese slag and slag provide early strength, while steel slag powder promotes later strength development and regulates setting time. That is, the combination of waste slags with different characteristics can play their respective roles in the early and late stages of hydration and structure formation processes, as well as in the regulation of setting time, thereby achieving the effect of making the best use of resources and complementing each other's advantages.

[0021] 3. The grouting material prepared in this invention has the characteristics of rapid early strength development, slow and continuous strength growth in the later stage, long setting time, large and adjustable fluidity, and good durability. Moreover, the preparation process is simple and the cost is low. It has the advantages of being environmentally friendly, efficient and resource-recyclable, and has broad application prospects.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 These are electrolytic manganese slag, steel slag, and blast furnace slag powders before and after 900℃ thermal activation treatment. Where a represents electrolytic manganese slag before 900℃ thermal activation treatment, b represents electrolytic manganese slag after 900℃ thermal activation treatment, c represents steel slag powder, and d represents blast furnace slag powder.

[0024] Figure 2 This is a microscopic morphology image of a 28-day hardened sample of the electrolytic manganese slag / steel slag / mineral slag-based grouting material prepared in Example 1 of this invention.

[0025] Figure 3 This is a microscopic morphology image of the 28-day hardened sample of the electrolytic manganese slag / steel slag / mineral slag-based grouting material prepared in Example 2 of the present invention.

[0026] Figure 4This is a microscopic morphology image of the 28-day hardened sample of the electrolytic manganese slag / steel slag / mineral slag-based grouting material prepared in Example 3 of this invention.

[0027] Figure 5 This is a microscopic morphology image of the 28-day hardened sample of the electrolytic manganese slag / steel slag / mineral slag-based grouting material prepared in Example 4 of this invention. Detailed Implementation

[0028] The electrolytic manganese slag used in the following examples is electrolytic manganese slag that has undergone thermal activation treatment at 900℃ and has a density of 1.11 g / cm³. 3 The steel slag powder is a bright black, low-alkalinity steel slag powder with a calcium oxide content of less than 30% and a density of 1.72 g / cm³. 3 The blast furnace slag powder is grade S95 with a density of 1.34 g / cm³. 3 .

[0029] The electrolytic manganese slag used was filter press residue produced by a manganese company in Tongren City, Guizhou Province, during the electrolytic production of metallic manganese. Steel slag powder and blast furnace slag powder were purchased from a mineral processing plant in Henan Province, and their chemical composition was tested (see Table 1).

[0030] Table 1 Chemical composition of electrolytic manganese slag, steel slag powder and blast furnace slag powder

[0031] raw material <![CDATA[SiO2]]> <![CDATA[Al2O3]]> <![CDATA[Fe2O3]]> CaO MgO <![CDATA[SO3]]> MnO <![CDATA[K2O]]> <![CDATA[P2O5]]> <![CDATA[TiO2]]> other Electrolytic manganese slag 25.79 6.54 4.49 15.79 2.02 37.99 4.72 1.77 - 0.39 0.50 Steel slag powder 22.62 6.33 22.31 26.85 5.63 0.97 3.62 0.29 0.79 1.24 9.35 Blast furnace slag powder 34.50 17.70 1.03 34.00 6.01 1.64 - 1.34 0.25 0.62 2.91

[0032] Example 1

[0033] In this embodiment, the electrolytic manganese slag / steel slag / blast furnace slag-based grouting material is made from the following raw materials in parts by weight: 10 parts electrolytic manganese slag, 60 parts steel slag powder, 30 parts blast furnace slag powder, 25 parts sodium hydroxide and 100 parts water, wherein the purity of the sodium hydroxide is ≥98.0%.

[0034] The preparation method of the electrolytic manganese slag / steel slag / mineral slag-based grouting material in this embodiment includes the following steps:

[0035] S1. Add sodium hydroxide to water and stir until fully dissolved to obtain an alkaline activator solution. Seal the solution with polyethylene film and let it cool before use.

[0036] S2. Place electrolytic manganese slag, steel slag powder and blast furnace slag powder into a mixer and stir for 3 minutes at a speed of 140 r / min to obtain mixed powder.

[0037] S3. Mix the mixed powder obtained in S2 with the alkaline activator solution obtained in S1 at a mass ratio of 2:1. Then, according to the standard procedure of GBT 1346-2011 "Test Methods for Standard Consistency Water Requirement, Setting Time and Soundness of Cement", automatically stir at a speed of 140 r / min for 120 seconds, stop for 15 seconds, and then stir at a speed of 285 r / min for 120 seconds, for a total of 255 seconds, to obtain the electrolytic manganese slag / steel slag / mineral slag-based grouting material.

[0038] Example 2

[0039] In this embodiment, the electrolytic manganese slag / steel slag / blast furnace slag-based grouting material is made from the following raw materials in parts by weight: 30 parts electrolytic manganese slag, 40 parts steel slag powder, 30 parts blast furnace slag powder, 25 parts sodium hydroxide and 100 parts water, wherein the purity of the sodium hydroxide is ≥98.0%.

[0040] The preparation method of the electrolytic manganese slag / steel slag / mineral slag-based grouting material in this embodiment includes the following steps:

[0041] S1. Add sodium hydroxide to water and stir until fully dissolved to obtain an alkaline activator solution. Seal the solution with polyethylene film and let it cool before use.

[0042] S2. Place electrolytic manganese slag, steel slag powder and blast furnace slag powder into a mixer and stir for 3 minutes at a speed of 140 r / min to obtain mixed powder.

[0043] S3. Mix the mixed powder obtained in S2 with the alkaline activator solution obtained in S1 at a mass ratio of 2:1. Then, according to the standard procedure of GBT 1346-2011 "Test Methods for Standard Consistency Water Requirement, Setting Time and Soundness of Cement", automatically stir at a speed of 140 r / min for 120 seconds, stop for 15 seconds, and then stir at a speed of 285 r / min for 120 seconds, for a total of 255 seconds, to obtain the electrolytic manganese slag / steel slag / mineral slag-based grouting material.

[0044] Example 3

[0045] In this embodiment, the electrolytic manganese slag / steel slag / blast furnace slag-based grouting material is made from the following raw materials in parts by weight: 50 parts electrolytic manganese slag, 20 parts steel slag powder, 30 parts blast furnace slag powder, 25 parts sodium hydroxide and 100 parts water, wherein the purity of the sodium hydroxide is ≥98.0%.

[0046] The preparation method of the electrolytic manganese slag / steel slag / mineral slag-based grouting material in this embodiment includes the following steps:

[0047] S1. Add sodium hydroxide to water and stir until fully dissolved to obtain an alkaline activator solution. Seal the solution with polyethylene film and let it cool before use.

[0048] S2. Place electrolytic manganese slag, steel slag powder and blast furnace slag powder into a mixer and stir for 3 minutes at a speed of 140 r / min to obtain mixed powder.

[0049] S3. Mix the mixed powder obtained in S2 with the alkaline activator solution obtained in S1 at a mass ratio of 2:1. Then, according to the standard procedure of GBT 1346-2011 "Test Methods for Standard Consistency Water Requirement, Setting Time and Soundness of Cement", automatically stir at a speed of 140 r / min for 120 seconds, stop for 15 seconds, and then stir at a speed of 285 r / min for 120 seconds, for a total of 255 seconds, to obtain the electrolytic manganese slag / steel slag / mineral slag-based grouting material.

[0050] Example 4

[0051] In this embodiment, the electrolytic manganese slag / steel slag / blast furnace slag-based grouting material is made from the following raw materials in parts by weight: 50 parts electrolytic manganese slag, 20 parts steel slag powder, 30 parts blast furnace slag powder, 33.3 parts sodium hydroxide and 100 parts water, wherein the purity of the sodium hydroxide is ≥98.0%.

[0052] The preparation method of the electrolytic manganese slag / steel slag / mineral slag-based grouting material in this embodiment includes the following steps:

[0053] S1. Add sodium hydroxide to water and stir until fully dissolved to obtain an alkaline activator solution. Seal the solution with polyethylene film and let it cool before use.

[0054] S2. Place electrolytic manganese slag, steel slag powder and blast furnace slag powder into a mixer and stir for 3 minutes at a speed of 140 r / min to obtain mixed powder.

[0055] S3. Mix the mixed powder obtained in S2 with the alkaline activator solution obtained in S1 at a mass ratio of 2:1. Then, according to the standard procedure of GBT 1346-2011 "Test Methods for Standard Consistency Water Requirement, Setting Time and Soundness of Cement", automatically stir at a speed of 140 r / min for 120 seconds, stop for 15 seconds, and then stir at a speed of 285 r / min for 120 seconds, for a total of 255 seconds, to obtain the electrolytic manganese slag / steel slag / mineral slag-based grouting material.

[0056] Example 5

[0057] In this embodiment, the electrolytic manganese slag / steel slag / blast furnace slag-based grouting material is made from the following raw materials in parts by weight: the mixed powder is composed of 50 parts electrolytic manganese slag, 20 parts steel slag powder, 30 parts blast furnace slag powder, 25 parts sodium hydroxide and 100 parts water, wherein the purity of the sodium hydroxide is ≥98.0%.

[0058] The preparation method of the electrolytic manganese slag / steel slag / mineral slag-based grouting material in this embodiment includes the following steps:

[0059] S1. Add sodium hydroxide to water and stir until fully dissolved to obtain an alkaline activator solution. Seal the solution with polyethylene film and let it cool before use.

[0060] S2. Place electrolytic manganese slag, steel slag powder and blast furnace slag powder into a mixer and stir for 3 minutes at a speed of 140 r / min to obtain mixed powder.

[0061] S3. Mix the mixed powder obtained in S2 with the alkaline activator solution obtained in S1 at a mass ratio of 5:3. Then, according to the standard procedure of GBT 1346-2011 "Test Method for Standard Consistency Water Requirement, Setting Time and Soundness of Cement", automatically stir at a speed of 140 r / min for 120 seconds, stop for 15 seconds, and then stir at a speed of 285 r / min for 120 seconds, for a total of 255 seconds, to obtain the electrolytic manganese slag / steel slag / mineral slag-based grouting material.

[0062] The grouting materials obtained in Examples 1-5 were poured into triple molds measuring 40mm×40mm×160mm to cast samples. After casting, the samples were cured under standard curing conditions (temperature 20±2℃, relative humidity ≥95%) for 24 hours before demolding. After demolding, they continued to be cured under standard curing conditions until the test age. The setting time was tested according to GB / T 1346-2011 "Test Methods for Standard Consistency Water Requirement, Setting Time and Soundness of Cement". The fluidity was tested according to GB / T 50448-2015 "Technical Specification for Application of Cement-Based Grouting Materials". The compressive strength was tested according to GB / T 17671-1999 "Test Method for Strength of Cement Mortar (ISO Method)". The test results are shown in Table 2 below. The fluidity of the freshly mixed grout decreased with increasing electrolytic manganese slag content and decreasing steel slag powder content, increased with increasing alkaline activator solution concentration, and also increased with increasing water-cement ratio. The slurry setting time decreased with increasing electrolytic manganese slag content and decreasing steel slag powder content, decreased with increasing alkaline activator solution concentration, and increased with increasing water-cement ratio. The compressive strength increased with increasing electrolytic manganese slag content, decreased with increasing steel slag powder content, decreased slightly with increasing alkaline activator solution concentration, and decreased with increasing water-cement ratio.

[0063] Table 2

[0064]

[0065] Toxicity leaching tests were conducted on the hardened samples after 28 days of curing. The test standard was the national environmental protection industry standard "Solid Waste Leaching Toxicity Leaching Method: Sulfuric Acid and Nitric Acid Method" (HJ / T299-2007).

[0066] Experimental Procedure: After the strength test of the hardened specimens after 28 days of curing, a toxicity leaching test was immediately conducted on the internal samples of the broken specimens. 20-30g of soil lumps were weighed into a crucible and dried in an oven at 105℃ until constant weight was achieved, ensuring the error between two weighings was less than ±1%. The moisture content of the sample was calculated. Based on the moisture content, the required volume of the extractant was calculated using a liquid-to-solid ratio of 10:1 (L / Kg). The test was conducted according to the methods and procedures specified in "Solid Waste Leaching Toxicity Leaching Method: Sulfuric Acid-Nitric Acid Method" (HJ / T299-2007). The extract was prepared using the sulfuric acid-nitric acid method, with a phosphoric acid to nitric acid mass ratio of 2:1. The 2:1 sulfuric acid-nitric acid mixture was dissolved in distilled water, and the pH was adjusted to 3.20±0.05 to obtain the desired extract. The samples used in the toxicity leaching test were taken from the crushed samples obtained after the unconfined compression test. The crushed samples were pulverized and passed through a 9.5 mm sieve. Then, the sample and extract were mixed at a ratio of 1:10 (ml / g) and placed on a turner with a turning rate of 30±2 r / min at 23±2℃ for 18±2 h. After turning, the extract was filtered through a 0.45 μm microporous membrane to obtain the filtrate. The Mn content in the leaching solution... 2+ and NH4 + The concentrations were tested according to Chinese standards (GB 11906-89) and (HJ535-2009), respectively. The leaching concentration of heavy metal ions was determined using inductively coupled plasma optical emission spectrometry (ICP-OES). NH4 + The determination was performed using Nessler's reagent spectrophotometry. The experimental results are shown in Table 3.

[0067] Table 3 Toxicity Leaching Results

[0068] <![CDATA[NH4 + ]]> <![CDATA[Mn 2+ ]]> <![CDATA[Cu 2+ ]]> <![CDATA[Zn 2+ ]]> <![CDATA[Ci 6+ ]]> <![CDATA[Cd 2+ ]]> <![CDATA[Se 4+ ]]> <![CDATA[Pb 2+ ]]> <![CDATA[Ni 2+ ]]> Electrolytic manganese slag (mg / L) 684.65 1350.55 0.04 5.93 0.02 0.06 0.28 0.28 7.44 Example 1 (mg / L) Not detected 0.042 0.012 0.024 0.003 0.008 0.010 0.003 0.004 Example 2 (mg / L) Not detected 0.031 0.011 0.023 0.003 0.007 0.017 0.002 0.002 Example 3 (mg / L) Not detected 0.089 0.010 0.015 0.002 0.004 0.026 0.002 0.002 Example 4 (mg / L) Not detected 0.089 0.002 0.006 0.001 0.001 0.019 0.001 0.001 GB8978-1996 (mg / L) 15.00 2.00 0.50 2.00 0.50 0.10 0.20 1.00 1.00

[0069] NH4 was almost undetectable in the toxic leaching solution. + This indicates that NH4 + It has been completely removed and will not generate NH3 pollution during engineering applications. Mn 2+ The grouting materials prepared in Examples 1-4 are effectively stabilized / cured and will not leach heavy metal ions in engineering applications, thus exhibiting good environmental safety.

[0070] from Figure 2 The results show that the 28-day hardened sample of the electrolytic manganese slag / steel slag / mineral slag-based grouting material prepared in Example 1 formed a layer of sheet-like cementitious material, containing some large polyhedral gel particles and pores. This sample can be used in projects with low strength requirements, such as for temporary grouting reinforcement of fractured rock masses. Figure 3The results show that the 28-day hardened sample of the electrolytic manganese slag / steel slag / mineral slag-based grouting material prepared in Example 2 contains a large amount of cementitious material with a relatively dense structure and small pores. The cementitious material is interconnected to form an amorphous network gel. This amorphous network gel fills the large pore structure of the sample, reducing the porosity and increasing the strength. Figure 4 The results show that the 28-day hardened sample of the electrolytic manganese slag / steel slag / mineral slag-based grouting material prepared in Example 3 has a dense microstructure, good integrity, and very few micropores. A small amount of steel slag powder is encapsulated by the generated cementitious material to form a relatively complete matrix, and the cementitious products are tightly bonded together. The amorphous gels are tightly stacked together, some even forming a dense matrix without obvious pores. Figure 5 The results show that the 28-day hardened sample of the electrolytic manganese slag / steel slag / mineral slag-based grouting material prepared in Example 4 has good matrix density and large cracks, but many amorphous network gels overlap each other, resulting in high integrity. The amorphous network gels fill part of the pores, reducing the large pores and lowering the porosity.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the inventive essence shall still fall within the protection scope of the present invention.

Claims

1. An electrolytic manganese slag / steel slag / slag-based grout material, characterized by, The electrolytic manganese residue, the steel slag micro-powder, the blast furnace slag micro-powder, the alkaline activator and water are prepared from the following raw materials by weight: 10-50 parts of electrolytic manganese residue, 20-60 parts of steel slag micro-powder, 30 parts of blast furnace slag micro-powder, 25-33.3 parts of alkaline activator and 100 parts of water; The electrolytic manganese residue is an electrolytic manganese residue after 900 DEG C heat activation treatment, and the density is 1.11 g / cm 3 ; the steel slag micro powder is a bright black low alkalinity steel slag micro powder with calcium oxide content less than 30%, and the density is 1.72 g / cm 3 ; the blast furnace slag micro powder is S95 grade, and the density is 1.34 g / cm 3 ; The alkaline activator is sodium hydroxide, and the purity of the sodium hydroxide is greater than or equal to 98.0%; The preparation method of the electrolytic manganese residue / steel slag / slag-based grouting material comprises the following steps: S1, the alkaline activator is added to water and mixed uniformly to obtain an alkaline activator solution, and the alkaline activator solution is sealed with a polyethylene film and cooled for later use; S2, the electrolytic manganese residue, the steel slag micro-powder and the blast furnace slag micro-powder are placed in a stirrer and stirred uniformly to obtain a mixed powder; S3, the mixed powder obtained in S2 is mixed with the alkaline activator solution obtained in S1, and then automatic stirring is performed according to a standard procedure to obtain the electrolytic manganese residue / steel slag / slag-based grouting material; the mass ratio of the mixed powder to the alkaline activator solution is (2-5):(1-3); the method of automatic stirring according to the standard procedure is: first slow stirring at a speed of 140 r / min for 120 seconds, stopping for 15 seconds, and then fast stirring at a speed of 285 r / min for 120 seconds, a total stirring time of 255 seconds.

2. A process for the preparation of an electrolytic manganese / steel / slag-based grouting material according to claim 1, characterized in that, The speed of the stirrer in S2 is 140 r / min, and the stirring time is 3 minutes.

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