CN115259624A - Red mud soil treatment method - Google Patents

Red mud soil treatment method Download PDF

Info

Publication number
CN115259624A
CN115259624A CN202211086372.1A CN202211086372A CN115259624A CN 115259624 A CN115259624 A CN 115259624A CN 202211086372 A CN202211086372 A CN 202211086372A CN 115259624 A CN115259624 A CN 115259624A
Authority
CN
China
Prior art keywords
red mud
mixed slurry
treatment method
silicon
stirring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202211086372.1A
Other languages
Chinese (zh)
Other versions
CN115259624B (en
Inventor
李小英
林琳
杨振
杨妮
田林
谢刚
王祖旭
彭学斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunming Metallurgical Research Institute
Original Assignee
Kunming Metallurgical Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunming Metallurgical Research Institute filed Critical Kunming Metallurgical Research Institute
Priority to CN202211086372.1A priority Critical patent/CN115259624B/en
Publication of CN115259624A publication Critical patent/CN115259624A/en
Application granted granted Critical
Publication of CN115259624B publication Critical patent/CN115259624B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

The invention discloses a red mud soil treatment method, which comprises the steps of pretreatment and main reaction, and specifically comprises the following steps: adjusting the water content of the red mud to be treated to 40 to 70% to obtain a material a; adding a silicon-containing compound into the material a, and stirring to obtain mixed slurry b; and fully stirring the mixed slurry b at the temperature of 10-30 ℃, and standing at the temperature of 40-80 ℃ for reaction to obtain the target silicon-containing fertilizer soil. The invention can effectively reduce the alkalinity of the red mud, increase the effective silicon content in the red mud, can be used as the silicon-containing soil beneficial to the growth of plants after the red mud returns to the earth, and has simple process, low energy consumption and low treatment cost.

Description

Red mud soil treatment method
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a red mud soil treatment method.
Background
Red mud is a waste produced in the process of refining alumina from bauxite. With the continuous development of the aluminum industry, about 120 million tons of red mud are generated all over the world at present, the red mud emission amount of China is more than 3000 million tons every year, and the total amount tends to rise. The main component elements are Al, fe, si, ca and Ti, and besides the main components, the rare earth element and trace radioactive elements such as rhenium, gallium, yttrium, scandium, niobium, uranium, thorium, lanthanide and the like are rich, and the elements are various in types, but the content is low, and the extraction value is not high.
At present, red mud worldwide is mainly Bayer process red mud, and alkali liquor contained in the red mud is an important problem of pollution from the generation, drying and stacking of the red mud. The pH value of red mud piled up in the dam is not less than 8, the pH value of the leaching liquid is usually 12-14, and the red mud (containing the attached liquid) belongs to harmful waste residues (strong alkaline soil). Each ton of red mud has 3-4m 3 The alkali-containing waste liquid mainly contains K, na, ca, mg, al, OH-and F - 、Cl - 、SO 4 - And the like. The main components of the red mud do not belong to substances which are particularly harmful to the environment, and the factors harmful to the environment mainly comprise alkali sodium and potassium, wherein the alkali is divided into attachment alkali, chemical alkali and lattice alkali. The attached alkali can be continuously dissociated and corroded, so that the soil piled up by the red mud and the peripheral soil cuncao can not grow, and the underground water can not be drunk; due to strong alkalinity, the building brick fired with the red mud continuously seeps alkali in the using process, so that the wall skin is cracked, the strength of the brick is reduced, and the beauty and the safety of a building are greatly influenced; the roadbed material made of the red mud can crack the road surface due to high free alkali, and the safety and the stability of the roadbed are influenced.
Therefore, the key problem of red mud treatment is to reduce the alkalinity of the red mud, reduce the alkalinity of the red mud by adopting a low-cost and low-energy consumption mode, enable the red mud to be in soil harmlessness and directly return to the earth to be used as soil planting plants, or use the treated red mud to process fertilizers, building materials and roadbed materials to really turn waste into wealth.
In the prior art, the 'method for restoring the soil and utilizing resources of the red mud' with the application number of 201210428344.3 is to roast the red mud at high temperature, carry out acid leaching treatment by hydrochloric acid, separate aluminum and iron in the red mud, and add coal gangue into the remaining neutral red mud residue to sinter the building brick. The hydrochloric acid added in the method is used for acid leaching, new corrosive new elements are brought to the red mud, the neutral red mud after valuable metal elements are separated is not suitable for processing building materials, and the method is too high in energy consumption and not beneficial to the requirements of energy conservation and consumption reduction of enterprises.
The application number of 201910191332.5, namely a method for converting red mud into soil by using pyrite cinder, is characterized in that red mud and a biomass material are mixed and paved on a bottom layer, a water-retaining material is paved above the mixture, a neutralizing material is paved above the water-retaining material, the neutralizing material is a mixture of the pyrite cinder and an oxidant, a soil publication is paved between the water-retaining material and the neutralizing material, and the neutralizing material is regularly sprayed; and (3) when the pH value of the red mud mixture at the bottom layer is 6-9, removing the neutralization material layer, and mixing the treated red mud mixture with a water retention material to obtain the argillized red mud. The sulfur-iron slag is oxidized in the air to generate sulfur dioxide, and then the sulfur dioxide reacts with water to generate sulfuric acid, so that the red mud is dealkalized, and meanwhile, the organic matter can also improve the nutritive value of the red mud, and finally the purpose of soil formation is achieved. However, the sodium sulfate or sodium sulfite finally produced in the application is also unfavorable for the environment, and is unreasonable as the soil containing fertilizer directly.
In the prior art, the red mud can be used for preparing the calcium silicate fertilizer, specifically, the red mud slurry is dehydrated and then activated at low temperature, the activated red mud is considered to have good weak acid solubility, the activated red mud is dissolved out by 2% citric acid solution, the citric acid dissolution rate of silicon, calcium and iron can reach 85-90%, and the dissolved components form weak acid salt compounds and soluble silicic acid which are dissolved in soil solution and then absorbed by roots. However, the siliceous minerals in red mud are stable in nature, are difficult to be converted into soluble silicate after low-temperature activation, and cannot be absorbed by plants. Therefore, it is necessary to develop a method capable of solving the above problems.
Disclosure of Invention
The invention aims to provide a method for treating red mud in a soil state.
The invention aims to realize the purpose, the red mud soil treatment method comprises the steps of pretreatment and main reaction, and specifically comprises the following steps:
A. pretreatment:
1) Adjusting the water content of the red mud to be treated to 40 to 70% to obtain a material a;
2) Adding a silicon-containing compound into the material a, and stirring to obtain mixed slurry b;
B. main reaction: and fully stirring the mixed slurry b at the temperature of 10-30 ℃, and standing at the temperature of 40-80 ℃ for reaction to obtain the target silicon-containing fertilizer soil.
According to the invention, white carbon black or micro silicon powder is added into wet dam red mud to form mixed slurry, low-temperature reaction is kept, and the mixed slurry is fully stirred and kept stand to obtain the silicon-containing fertilizer soil. The obtained soil containing silicon fertilizer has effective silicon content of 1-5% and pH value of 8-9.
The reaction principle of the invention is as follows: siO 2 2 ·nH 2 O+2NaOH=Na 2 SiO 3 +（n+1）H 2 And O. The total silicon content of natural soil is about 31%, and about 99% of the soil is crystalline and amorphous, mainly exists in quartz and secondary clay mineral, cannot be used as nutrient absorbed by plant body, and only trace amount of monosilicic acid [ ortho silicic acid, si (OH) in soil solution 4 ]Na which is produced by the reaction of the present invention and can be absorbed by plants 2 SiO 3 The silicon contained in the fertilizer is effective silicon which is beneficial to plant absorption.
The dam red mud is bauxite tailing waste which is stockpiled in the alumina production process and is washed to remove sodium, and the pH value is 10-14 usually. The result of XRD quantitative analysis of the red mud of the dam shows that the red mud contains various stable minerals, mainly nepheline, hematite and calcium hydrogarnet, the total amount of the three is 72.09%, and in addition, calcite, ilmenite, quartz, kaolinite and rutile are also contained. Wherein nepheline, hydrocalcite, quartz and kaolinite contain silicon, but do not belong to the group of available silicon that can be absorbed by plants.
The total alkali content in the dam red mud is 6-6.2%, the free alkali content is 0.1-0.15%, the pH value is 10-14, and the water content of the wet dam red mud is 10-70%. Alkali in the red mud mainly exists in the forms of chemical alkali and lattice alkali, free alkali is also called as attached alkali, the free alkali can be separated through water washing, the free alkali exists harmful to the natural environment, and the harmless treatment of the red mud needs to neutralize and solidify the free alkali.
The white carbon black is a general name of white powdery X-ray amorphous silicic acid and silicate products, and refers to precipitated silica, fumed silica, ultrafine silica gel, powdery synthetic aluminum silicate or/and calcium silicate.
The micro silicon powder is also called as silica fume or condensed silica fume, and is a large amount of SiO with strong volatility produced in an ore-smelting electric furnace when ferroalloy is used for smelting ferrosilicon and industrial silicon (metallic silicon) 2 And Si gas, which is quickly oxidized, condensed and precipitated with air after being discharged. The micro silicon powder has fineness less than 1 μm and average particle size of 0.1-0.3 μm, and is ash-like amorphous powder.
In order to further realize the purpose of the invention, the proportion of the added white carbon black or/and the micro silicon powder is as follows: the mass ratio of the white carbon black or/and the micro silicon powder is 1000:0.8 to 6.
In order to further achieve the purpose of the invention, the white carbon black is preferably fumed silica.
In order to further realize the aim of the invention, the low-temperature reaction temperature is 15-120 ℃.
In order to further realize the aim of the invention, the reaction time is 1 to 15 days.
For further realizing the purpose of the invention, the stirring rotating speed is 300r/min to 8000r/min.
In order to further realize the aim of the invention, the pH value of the wet dam red mud is adjusted to the water content of not less than 50%.
For further object of the invention, the said well-stirredThe conditions are firstly laminar low-speed stirring (fully mixing the materials) for 0-30 min, standing for 5-48 h, then turbulent high-speed stirring for 0.1-1 h, and standing reaction for 24-15 days. The laminar flow low-speed stirring aims at mixing materials, standing for a period of time to enable alkali attached to the surface of the red mud to be fully blended into the slurry, and then carrying out turbulent flow high-speed stirring on the mixed slurry to enable SiO to be stirred at high speed 2 Fully mixing the red mud slurry and reacting.
Laminar stirring means that the fluid flows only in a laminar manner by stirring, and the fluid flows in layers without mixing; turbulent stirring means that fluid only does irregular movement, a streamline is not clear and can be distinguished, a plurality of small vortexes exist in a flow field, laminar flows are damaged, and adjacent laminar flows not only slide but also are mixed to form turbulent flow.
In order to further realize the purpose of the invention, firstly, laminar stirring is carried out on the mixed slurry for 5 to 8 times at normal temperature, the total time is 2 to 15min, the stirring speed is 300 to 800r/min, the mixed slurry is kept stand for 5 to 24h, then the mixed slurry is heated to 40 to 80 ℃ for 5 to 8 times of turbulent stirring, the total time is 10 to 15min, the stirring speed is 1500 to 5000r/min, and the mixed slurry is kept stand for 1 to 2 days or is kept stand for 3 to 15 days without heat preservation. The obtained siliceous fertilizer soil is directly sown on the surface of gobi deserts, saline-alkali soil or barren soil where plants are not easy to grow after granulation, and the plants can grow in the next year.
The invention has the beneficial effects that:
(1) The process is simple and easy for industrial popularization.
(2) Low reaction temperature, short stirring time and low energy consumption. In the prior art, most of the comprehensive utilization or harmless treatment of the red mud adopts a roasting or leaching method to extract valuable metal elements, and although the types of the valuable metals in the red mud are numerous, the content is low, the energy consumption of the extraction process is high, and the efficiency is low.
(3) The effective silicon content of the soil prepared by the method is 1-5%, which is beneficial to plant growth. The soil existing in nature does not contain effective silicon, but the red mud treated by the method contains effective silicon beneficial to plant growth, and although the red mud does not reach the standard of more than 10 percent of silicon fertilizer, the soil containing the silicon fertilizer prepared by the method can be used as soil and can also be used as a raw material for preparing the silicon fertilizer.
(4) The pH value of the treated dam red mud is lower than 8, and the requirement of most plants on growth can be met. Almost all plants do not survive in alkaline soils with pH above 9, but most plants can grow at pH below 8.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a graphical representation of the pH trend of the material over time at various stages of the comparative example of the present invention;
FIG. 3 is a graph showing the pH trend of the material at each stage of example 1 of the present invention with time;
FIG. 4 is a graph showing the pH trend of the material with time at each stage of example 2 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, but is not intended to be limited in any way, and any modifications or alterations based on the teachings of the invention are intended to fall within the scope of the invention.
The red mud soil treatment method comprises the steps of pretreatment and main reaction, and specifically comprises the following steps:
A. pretreatment:
1) Adjusting the water content of the red mud to be treated to 40 to 70% to obtain a material a;
2) Adding a silicon-containing compound into the material a and stirring to obtain mixed slurry b;
B. main reaction: and fully stirring the mixed slurry b at the temperature of 10-30 ℃, and standing at the temperature of 40-80 ℃ for reaction to obtain the target silicon-containing fertilizer soil.
Step A1) is to adjust the water content of the red mud to be treated to 50 to 70 percent to obtain a material a.
The silicon-containing compound in the step A2) is white carbon black and/or micro silicon powder.
The silicon-containing compound is white carbon black and micro silicon powder.
The mass ratio of the white carbon black to the micro silicon powder is (0.5 to 1) to (0.5 to 1).
The white carbon black is fumed silica.
The adding amount of the silicon-containing compound in the step A2) is 0.8 to 6 per mill of the dry red mud to be treated with the water content of 8 to 12 percent.
And step B, stirring the mixed slurry B at 10 to 30 ℃ in a low-speed layer flow manner for 0 to 30min, standing at 10 to 30 ℃ for 5 to 48h, stirring at 40 to 80 ℃ in a turbulent flow manner at a high speed for 0.1 to 1h, and standing at 10 to 80 ℃ for reaction for 1 to 15 days.
And B, stirring the mixed slurry B at 10 to 30 ℃ for 5 to 8 times in a low-speed layer flow manner for 2 to 15min in total, then standing for 5 to 24h at 10 to 30 ℃, then carrying out turbulent flow and high-speed stirring at 40 to 80 ℃ for 5 to 8 times in total for 10 to 15min in total, and standing and reacting for 3 to 15 days at 10 to 30 ℃ or 1 to 2 days at 40 to 80 ℃.
The rotation speed of the low-speed laminar flow stirring is 300 to 800r/min; the rotating speed of the turbulent high-speed stirring is 1500-5000 r/min.
The invention is further illustrated by the following specific examples:
the red mud selected by the concrete embodiment of the invention is red mud stockpiled in a dam of Bayer process alumina in aluminum industry of Yunnan Wenshan mountain, the total alkali content is 6 to 6.2 percent, the free alkali content is 0.1 to 0.15 percent, and the pH value is 10 to 12.
Comparative example
The silicon-containing fertilizer soil is prepared by standing red mud stockpiled in the dam of the alumina by the Bayer process in the Yunnan Shanshan Al industry at normal temperature, the pH value of the test result is shown in the table 1, and the pH change trend is shown in the figure 2.
TABLE 1 specific pH values over time for the comparative examples
Figure DEST_PATH_IMAGE001
Example 1
Adjusting the water content of the red mud stockpiled in the alumina dam of the Yunnan Shanshan aluminum industry by Bayer process to 60%, adding fumed silica (the mass ratio of the red mud dry materials (fumed silica and micro silicon powder) is 1000.
As shown in table 2, the pH value of the red mud or the mixed slurry is detected according to the time node, 0h represents that the detected pH value of the dam red mud is detected, 0.17h represents that the mixed slurry is stirred at a low speed, 1.1h represents that the mixed slurry is left to stand for 1 hour after being stirred at a low speed, 2.1h represents that the mixed slurry is left to stand for 2 hours after being stirred at a low speed, 3.1h represents that the mixed slurry is left to stand for 3 hours after being stirred at a low speed, 4.1h represents that the mixed slurry is left to stand for 4 hours after being stirred at a low speed, 5.1 represents that the mixed slurry is left to stand for 5 hours after being stirred at a low speed, 5.35h represents that the mixed slurry is stirred at a high speed, 17.35h represents that the mixed slurry is left to stand for 12 hours after being stirred at a high speed, 29.35h represents that the mixed slurry is left to stand for 24 hours after being stirred at a high speed, 41.35h represents that the mixed slurry is left to stand for 36 hours after being stirred at a high speed, 53.35h represents that the mixed slurry is left to stand for 48 hours after being stirred at a high speed, and the pH value is shown in a specific trend of fig. 3.
Table 2 example 1 specific pH values over time
Figure DEST_PATH_IMAGE002
Example 2
Adjusting the water content of red mud stockpiled in the alumina dam of the Yunnan Shanshan aluminum industry by Bayer process to 40%, adding silica fume (the mass ratio of the red mud dry materials is 1000 (superfine silica and silica fume)) into the wet red mud of the dam to form mixed slurry, firstly stirring at a laminar flow of 300r/min at a low speed for 15min at the normal temperature of 25 ℃, carrying out stirring for 6 times, then standing for 24 hours, heating the mixed slurry to 60 ℃, stirring at a rotating speed of 4500r/min for 7 times, stirring for 10min, and carrying out heat preservation and standing for 1 day to obtain the silicon-containing fertilizer soil with the pH of 7.91 and the effective silicon content of 4.28%.
As shown in table 3, the pH value of the red mud or the mixed slurry is detected at a time node, 0h represents the detected pH value of the dam red mud, 0.25h represents the detected pH value of the mixed slurry after low-speed stirring, 12.25h represents the detected pH value of the mixed slurry after low-speed stirring and standing for 12 hours, 24.25h represents the detected pH value of the mixed slurry after low-speed stirring and standing for 24 hours, 24.32h represents the detected pH value of the mixed slurry after high-speed stirring, 36.32h represents the detected pH value of the mixed slurry after high-speed stirring and standing for 12 hours, 48.32h represents the detected pH value of the mixed slurry after high-speed stirring and standing for 24 hours, and the pH value variation trend is shown in fig. 4.
Table 3 example 2 specific pH values over time
Figure DEST_PATH_IMAGE003
Example 3
Adjusting the water content of red mud stockpiled in the alumina dam of the Yunnan Shanshan aluminum industry by Bayer process to 70%, adding precipitated silica (the mass ratio of red mud dry materials (precipitated silica and micro silicon powder) is 1000.
Example 4
The water content of the red mud piled up in the dam of the alumina by the Bayer process in the aluminum industry of Yunnan Wenshan mountain is adjusted to be 50%, powdered synthetic aluminum silicate or/and calcium silicate (the mass ratio of the dry red mud (aluminum silicate and micro silicon powder) is 1000.
Example 5
Adjusting the water content of red mud stockpiled in the alumina dam of the Yunnan Shanshan aluminum industry by Bayer process to 65%, adding powdery synthetic aluminum silicate or/and calcium silicate (the mass ratio of the dry red mud (calcium silicate and micro silicon powder) is 1000.

Claims (10)

1. The red mud soil chemical treatment method is characterized by comprising the steps of pretreatment and main reaction, and specifically comprises the following steps:
A. pretreatment:
1) Adjusting the water content of the red mud to be treated to 40 to 70% to obtain a material a;
2) Adding a silicon-containing compound into the material a and stirring to obtain mixed slurry b;
B. main reaction: and fully stirring the mixed slurry b at the temperature of 10-30 ℃, and standing at the temperature of 40-80 ℃ for reaction to obtain the target silicon-containing fertilizer soil.
2. The red mud soil chemical treatment method according to claim 1, wherein the material a is obtained by adjusting the water content of the red mud to be treated to 50 to 70% in step A).
3. The red mud soil chemical treatment method according to claim 1, wherein the silicon-containing compound in step a) is white carbon black and/or silica fume.
4. The red mud soil chemical treatment method according to claim 1 or 3, wherein the silicon-containing compound is white carbon black and silica fume.
5. The red mud soil treatment method according to claim 4, wherein the mass ratio of the white carbon black to the silica fume is (0.5 to 1) to (0.5 to 1).
6. The red mud soil chemical treatment method according to claim 3, wherein the white carbon black is fumed silica.
7. The red mud soil-working treatment method according to claim 1, wherein the addition amount of the silicon-containing compound in step A2) is 0.8 to 6 per mill of the dry red mud to be treated with water content of 8 to 12 percent.
8. The red mud soil treatment method according to claim 1, wherein the step B comprises the steps of stirring the mixed slurry B at 10 to 30 ℃ in a low-speed laminar flow for 0 to 30min, standing at 10 to 30 ℃ for 5 to 48h, stirring at 40 to 80 ℃ in a turbulent flow for 0.1 to 1h, and standing at 10 to 80 ℃ for reaction for 1 to 15 days.
9. The red mud soil improvement processing method according to claim 1, wherein the step B is to stir the mixed slurry B at 10 to 30 ℃ in a low-speed layer flow manner for 5 to 8 times, the total time is 2 to 15min, then the mixed slurry B is kept stand at 10 to 30 ℃ for 5 to 24h, then the mixed slurry B is stirred at a high speed for 5 to 8 times at 40 to 80 ℃ in a turbulent flow manner, the total time is 10 to 15min, and the mixed slurry B is kept stand at 10 to 30 ℃ for reaction for 3 to 15 days or at 40 to 80 ℃ for 1 to 2 days.
10. The red mud soil-working treatment method according to claim 8 or 9, wherein the rotation speed of the low-speed laminar flow stirring is 300 to 800r/min; the rotating speed of the turbulent high-speed stirring is 1500-5000 r/min.
CN202211086372.1A 2022-09-06 2022-09-06 Red mud soil treatment method Active CN115259624B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211086372.1A CN115259624B (en) 2022-09-06 2022-09-06 Red mud soil treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211086372.1A CN115259624B (en) 2022-09-06 2022-09-06 Red mud soil treatment method

Publications (2)

Publication Number Publication Date
CN115259624A true CN115259624A (en) 2022-11-01
CN115259624B CN115259624B (en) 2023-12-08

Family

ID=83756826

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211086372.1A Active CN115259624B (en) 2022-09-06 2022-09-06 Red mud soil treatment method

Country Status (1)

Country Link
CN (1) CN115259624B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61497A (en) * 1984-04-28 1986-01-06 Nippon Jiryoku Senko Kk Utilization of high basicity steel making slug
CN103449781A (en) * 2013-07-27 2013-12-18 安徽省中坤元新型建材有限公司 Red mud foamed light-weight thermal-insulation board and preparation method thereof
CN103641649A (en) * 2013-11-06 2014-03-19 马鞍山科邦生态肥有限公司 A fertilizer with magnetic effects and a preparation method thereof
CN106607452A (en) * 2016-11-22 2017-05-03 湖南省土壤肥料研究所 Conditioner for repairing medium-light acidic cadmium-contaminated soil, preparation method and application
CN106800938A (en) * 2016-12-22 2017-06-06 胡自田 A kind of siliceous fertilizer combined soil renovation agent for rehabilitating soil and preparation method thereof
WO2017101746A1 (en) * 2015-12-18 2017-06-22 郑州中绿环保新材料有限公司 Bauxite desiliconization method
CN113441519A (en) * 2021-06-28 2021-09-28 广西田东锦鑫化工有限公司 Bayer process red mud dealkalization and alkali recovery process
CN113860675A (en) * 2021-09-21 2021-12-31 桂林理工大学 Method for controlling alkali by adopting solid combined reagent red mud
CN114985433A (en) * 2022-06-01 2022-09-02 郑州大学 Method for full utilization of red mud in soil

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61497A (en) * 1984-04-28 1986-01-06 Nippon Jiryoku Senko Kk Utilization of high basicity steel making slug
CN103449781A (en) * 2013-07-27 2013-12-18 安徽省中坤元新型建材有限公司 Red mud foamed light-weight thermal-insulation board and preparation method thereof
CN103641649A (en) * 2013-11-06 2014-03-19 马鞍山科邦生态肥有限公司 A fertilizer with magnetic effects and a preparation method thereof
WO2017101746A1 (en) * 2015-12-18 2017-06-22 郑州中绿环保新材料有限公司 Bauxite desiliconization method
CN106607452A (en) * 2016-11-22 2017-05-03 湖南省土壤肥料研究所 Conditioner for repairing medium-light acidic cadmium-contaminated soil, preparation method and application
CN106800938A (en) * 2016-12-22 2017-06-06 胡自田 A kind of siliceous fertilizer combined soil renovation agent for rehabilitating soil and preparation method thereof
CN113441519A (en) * 2021-06-28 2021-09-28 广西田东锦鑫化工有限公司 Bayer process red mud dealkalization and alkali recovery process
CN113860675A (en) * 2021-09-21 2021-12-31 桂林理工大学 Method for controlling alkali by adopting solid combined reagent red mud
CN114985433A (en) * 2022-06-01 2022-09-02 郑州大学 Method for full utilization of red mud in soil

Also Published As

Publication number Publication date
CN115259624B (en) 2023-12-08

Similar Documents

Publication Publication Date Title
US11332380B2 (en) Method for aluminum-enhanced dealkalization of red mud and separation and recovery of aluminum and iron
Liu et al. Review on treatment and utilization of bauxite residues in China
US7871583B2 (en) Process for recovery of silica followed by alumina from coal fly ash
CN103290215B (en) Method for curing and leaching reinforced stone coal navajoite concentrated acid
CN110484267A (en) A kind of mineral soil conditioner and preparation method thereof using flyash production
CN102218431A (en) Harmless processing method for metal tailings
CN109290060A (en) A kind of process for subsequent treatment and phosphate ore floatation method of phosphate ore flotation tailings
CN101062783B (en) Environment-friendly type technique for vanadium extraction of stone coal
CN108147443A (en) Aluminium oxide and the method for preparing Antaciron are extracted from flyash
CN108070384A (en) It is a kind of using red mud as acidic soil conditioner of matrix and preparation method thereof
CN111039299B (en) Method for efficiently recycling lead-zinc tailings
CN115259624B (en) Red mud soil treatment method
CN104876198A (en) Sodium fluosilicate production-phosphorite demagging combined treatment method
CN114192556B (en) Method for roasting, deironing and whitening coal gangue and whitened coal gangue material prepared by same
CN116640028A (en) Silicon-based slow-release potash fertilizer and manufacturing method thereof
CN110981242B (en) Method for preparing high-strength anhydrous gypsum from calcium sulfide slag
CN106854701A (en) A kind of silicon Rock coal containing alum water vapour charing pretreatment high prepares V2O5Method
CN109627071A (en) A kind of composition that the harmless treatment of electrolytic manganese residues is used
CN105126794B (en) A kind of application for the method and the carrier of oxygen that the carrier of oxygen is prepared using wastewater sludge
CN116511220B (en) Manganese slag multistage countercurrent classification resource utilization method based on particle size distribution
CN109626853A (en) A kind of harmless treatment process of electrolytic manganese residues
CN112430742B (en) Low-cost alumina red mud recycling process method and application thereof
CN107812507A (en) A kind of ardealite metal-adsorbing material and preparation method thereof
CN106830240A (en) A kind of method of utilization bastard coal ground mass flocculant process black water
Wang et al. A zero-emission collaborative treatment method for brown corundum fly ash and carbide slag: Producing silicon fertilizer while recovering gallium and potassium

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant