CN113620624A - Biochemical impurity removal method for titanium gypsum - Google Patents

Biochemical impurity removal method for titanium gypsum Download PDF

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Publication number
CN113620624A
CN113620624A CN202010380594.9A CN202010380594A CN113620624A CN 113620624 A CN113620624 A CN 113620624A CN 202010380594 A CN202010380594 A CN 202010380594A CN 113620624 A CN113620624 A CN 113620624A
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titanium gypsum
titanium
shewanella
gypsum
removing impurities
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蒋旭峰
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Bopai Building Technology Shanghai Co ltd
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Bopai Building Technology Shanghai Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/005—Preparing or treating the raw materials
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/468—Purification of calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
    • C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

A method for biochemically removing impurities from titanium gypsum comprises the following steps: s1 reduction treatment: adding iron reducing bacteria into the titanium gypsum to reduce Fe in the titanium gypsum3+Reducing to magnetite to prepare a titanium gypsum matrix; s2 dehydration treatment: the titanium gypsum matrix loses water at normal temperature and normal pressure until the water content in the titanium gypsum matrix is below 5 percent; s3 magnetic separation treatment: and removing iron impurities from the dehydrated titanium gypsum through magnetic separation. The method for biochemically removing impurities from titanium gypsum of the invention removes Fe (OH) in the titanium gypsum3The titanium gypsum after the impurity removal is white in color, low in viscosity and low in water absorption, and can be reused as a high-quality gypsum-based building material.

Description

Biochemical impurity removal method for titanium gypsum
Technical Field
The invention relates to the technical field of titanium gypsum treatment, in particular to a method for biochemically removing impurities from titanium gypsum.
Background
Titanium gypsum is one of industrial by-product gypsums, is waste residue produced by adding lime into waste acid produced in the process of producing titanium white by using sulfuric acid method, its main components are calcium sulfate and a certain quantity of ferrous sulfate and its oxide, and it has the characteristics of high water content, high viscosity and deep colour. The impurities in the titanium gypsum are mainly Fe (OH)3And FeSO4The total iron content of the titanium gypsum is usually around 10%, Fe (OH)3The gel is flocculent, which is the main reason for the high viscosity and high water content of the titanium gypsum. In addition, the titanium gypsum has dark color due to the existence of iron ions, and the titanium gypsum is difficult to straightenAnd then utilizing.
At present, more than 90% of titanium dioxide production enterprises in China adopt a sulfuric acid process production process, the discharged titanium gypsum is about 22Mt, the comprehensive utilization rate of the titanium gypsum is only 10%, the discharged titanium gypsum is a byproduct gypsum with the lowest utilization rate, and the accumulated inventory exceeds 130 Mt. At present, titanium gypsum is generally subjected to impurity removal processes for removing iron ions before being utilized, and the impurity removal processes are complex and high in cost, so that the comprehensive utilization rate of the titanium gypsum is difficult to improve.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a biochemical impurity removal method which can effectively remove impurity iron ions in titanium gypsum and is convenient for later-stage reutilization of the titanium gypsum.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for biochemically removing impurities from titanium gypsum comprises the following steps:
s1 reduction treatment: adding iron reducing bacteria into the titanium gypsum to reduce Fe in the titanium gypsum3+Reducing to magnetite to prepare a titanium gypsum matrix;
s2 dehydration treatment: the titanium gypsum matrix loses water at normal temperature and normal pressure until the water content in the titanium gypsum matrix is below 5 percent;
s3 magnetic separation treatment: and removing iron impurities from the dehydrated titanium gypsum through magnetic separation.
Preferably, the iron-reducing bacteria in the S1 reduction treatment are Shewanella pictophotolerans WP3 of Shewanella, and the Shewanella pictophotolerans WP3 strain reduces Fe in titanium gypsum in a high pressure vessel3+。
Preferably, the iron-reducing bacteria added in the S1 reduction treatment is a culture solution of Shewanella piozotolerans WP3 strain, in which the concentration of Shewanella piozotolerans WP3 strain is 106～108CFU/ml, wherein the mass of the culture solution added in the S1 reduction treatment is 5-12% of the mass of the titanium gypsum.
Preferably, the concentration of the Shewanella piotolerans WP3 strain in the culture solution added for the S1 reduction treatment is 1.5X 107CFU/ml, said culture brothIs 10% of the titanium gypsum.
Preferably, in the S1 reduction treatment, the temperature in the high-pressure container is 10-15 ℃.
Preferably, in the S1 reduction process, the hydrostatic pressure in the high-pressure vessel is 1 to 5 MPa.
Preferably, in the S1 reduction treatment, the reaction time of the Shewanella piozotolerans WP3 strain and the titanium gypsum in a high-pressure container is 48-72 h.
Preferably, in the S1 reduction treatment, the content of iron in the titanium gypsum is 8-13%.
Preferably, the S2 dehydration treatment is to allow the titanium gypsum matrix to stand at normal temperature and pressure for 24-48 hours until the water content in the titanium gypsum matrix is less than 5%.
The invention relates to a method for biochemically removing impurities from titanium gypsum, which biochemically treats the titanium gypsum through iron reducing bacteria to ensure that Fe3+And the magnetite particles are converted into magnetite particles, the water in the titanium gypsum is further removed through water loss treatment, and finally the iron impurities in the titanium gypsum are removed through magnetic separation treatment. The method has no pollution and low energy consumption, and realizes the aim of treating Fe (OH) in the titanium gypsum3And after the gel is removed, the titanium gypsum after impurity removal is white in color, low in viscosity and low in water absorption, and can be reused as a high-quality gypsum-based building material, so that the resource waste and the environmental pressure caused by the titanium gypsum are reduced.
Detailed Description
The following examples are given to further illustrate specific embodiments of the method for biochemically removing impurities from titanium gypsum according to the present invention. The method for biochemically removing impurities from titanium gypsum is not limited to the description of the following examples.
The first embodiment is as follows:
the embodiment provides a method for biochemically removing impurities from titanium gypsum, which sequentially comprises S1 reduction treatment, S2 dehydration treatment and S3 magnetic separation treatment. The specific operation of the S1 reduction treatment is as follows: adding iron reducing bacteria into the titanium gypsum to reduce Fe in the titanium gypsum3+Reducing to magnetite to prepare a titanium gypsum matrix; the specific operation of the water loss treatment of S2 is as follows: the water content of the titanium gypsum matrix is reduced to the water content of the titanium gypsum matrix at normal temperature and normal pressureIs less than 5 percent; the specific operation of the S3 magnetic separation treatment is as follows: and (4) removing iron impurities from the dehydrated titanium gypsum through magnetic separation operation to obtain the titanium gypsum after impurity removal.
The titanium gypsum is rich in FeSO4、Fe(OH)3Etc. of iron-containing substances, wherein, Fe (OH)3The colloidal form of the titanium gypsum is the main reason of high water absorption and high viscosity of the titanium gypsum, and Fe (OH)3The colloid contains a large amount of Fe3+The content of iron in the titanium gypsum is usually about 10%, usually between 8-13%, and through detection, the content of water in the components of the titanium gypsum selected in this embodiment is 20%, which is Fe2O3Content of (2) characterizes Fe in titanium gypsum3+Content of (1), Fe2O3The content of (2) is 18%, of course, the method for biochemically removing impurities from titanium gypsum in this embodiment is not limited to titanium gypsum of this component, and the method in this embodiment can be applied to titanium gypsum of different component forms.
Fe in the titanium gypsum is reduced under the action of iron reducing bacteria through an S1 reduction treatment step3+Reducing the iron-reducing bacteria into magnetite particles with stronger magnetism, wherein the iron-reducing bacteria in the embodiment are Shewanella pictophotolerans WP3 and Shewanella pictophotolerans WP3 strains with reducibility under high-pressure environment, and Fe can be obtained3+Reducing to magnetite particles.
Specifically, 100kg of titanium gypsum was placed in a high-pressure vessel, and a culture solution of Shewanella piozoledran WP3 strain was added to the high-pressure vessel, wherein the concentration of Shewanella piozoledran WP3 strain in the culture solution was 1.5X 107CFU/ml, the mass of the added culture solution is 5 percent of that of the titanium gypsum, namely the mass of the added culture solution is 5 kg. Controlling the hydrostatic pressure of the high-pressure container to be 1-5 MPa, keeping the temperature in the high-pressure container to be 10-15 ℃, and reacting for 48 hours to obtain Fe in the titanium gypsum3+The magnetite particles are completely reduced in a high-pressure environment, and become large in nucleation in the high-pressure environment and have a certain granularity. With Fe (OH) in titanium gypsum3The gel content is continuously reduced, the water absorption of the titanium gypsum is obviously reduced, the viscosity is reduced, the water in the titanium gypsum naturally settles, and a titanium gypsum matrix is obtained in a high-pressure container.
The titanium gypsum matrix is separated from the high-pressure container to be in the normal-pressure environment, and the Shewanella piezotolerans WP3 strain can lose the reduction activity in the normal-pressure environment and cannot influence the subsequent application of the titanium gypsum. And (3) standing the titanium gypsum matrix for 1 day at normal temperature and normal pressure until the water content of the titanium gypsum matrix is reduced to be below 5%, and finishing the water loss treatment of S2. Of course, the water loss treatment of S2 in this embodiment can also remove water from the titanium gypsum matrix by means of a centrifuge or the like, which has high water removal efficiency but is too energy-consuming.
Magnetically separating the dehydrated titanium gypsum to remove Fe in the titanium gypsum3+Reducing the formed magnetite particles to form titanium gypsum after impurity removal.
Through the steps, Fe (OH) in the titanium gypsum3The gel is removed, the water absorption of the titanium gypsum is reduced, the viscosity is reduced, and due to Fe3+The titanium gypsum after impurity removal is white in color and can be used as a high-quality raw material of gypsum-based building materials.
The viscosity of the titanium gypsum treated by the steps is obviously reduced, the water consumption of the standard consistency is reduced from 230g to 205g, the compressive strength in 2 hours is 4.3MPa, and the flexural strength is 2.1 MPa.
Example two
S1 reduction treatment: 100Kg of titanium gypsum was placed in a high pressure vessel, and a culture solution of Shewanella piozoledran WP3 strain was added to the high pressure vessel, wherein the concentration of Shewanella piozoledran WP3 strain in the culture solution was 15X 107CFU/ml, the mass of the added culture solution is 7 percent of that of the titanium gypsum, namely the mass of the added culture solution is 7 Kg. Controlling the hydrostatic pressure of the high-pressure container to be 1-5 MPa, controlling the temperature in the high-pressure container to be 10-15 ℃, and reacting for 72 hours to obtain Fe in the titanium gypsum3+And reducing completely to form a titanium gypsum matrix.
S2 dehydration treatment: the titanium gypsum matrix is separated from the high-pressure container and is in the normal-pressure environment, and the Shewanella piezotolerans WP3 strain loses the reduction activity in the normal-pressure environment. And (3) standing the titanium gypsum matrix for 2 days at normal temperature and normal pressure until the water content of the titanium gypsum matrix is reduced to be below 5%.
S3 magnetic separation treatment: for and lossPerforming magnetic separation on the titanium gypsum after water treatment to remove Fe in the titanium gypsum3+Reducing the formed magnetite particles to form titanium gypsum after impurity removal.
The water consumption of the titanium gypsum standard consistency treated by the steps is reduced from 230g to 205g, the 2-hour compressive strength is 4.1MPa, and the flexural strength is 2.2 MPa.
EXAMPLE III
S1 reduction treatment: 100kg of titanium gypsum was placed in a high-pressure vessel, and a culture solution of Shewanella piozoledran WP3 strain was added to the high-pressure vessel, the concentration of the Shewanella piozoledran WP3 strain in the culture solution was 1.5X 107CFU/ml, the mass of the added culture solution is 10% of that of the titanium gypsum, namely the mass of the added culture solution is 10 kg. Controlling the hydrostatic pressure of the high-pressure container to be 1-5 MPa, controlling the temperature in the high-pressure container to be 10-15 ℃, and reacting for 60 hours to obtain Fe in the titanium gypsum3+And reducing completely to form a titanium gypsum matrix.
S2 dehydration treatment: the titanium gypsum matrix is separated from the high-pressure container and is in the normal-pressure environment, and the Shewanella piezotolerans WP3 strain loses the reduction activity in the normal-pressure environment. And (3) standing the titanium gypsum matrix for 1.5 days at normal temperature and normal pressure until the water content of the titanium gypsum matrix is reduced to be less than 5%.
S3 magnetic separation treatment: magnetically separating the dehydrated titanium gypsum to remove Fe in the titanium gypsum3+Reducing the formed magnetite particles to form titanium gypsum after impurity removal.
The viscosity of the titanium gypsum treated by the steps is obviously reduced, the water consumption of the standard consistency is reduced from 230g to 200g, the compressive strength in 2 hours is 4.7MPa, and the flexural strength is 2.4 MPa.
Example four
S1 reduction treatment: 100Kg of titanium gypsum was placed in a high-pressure vessel, and a culture solution of Shewanella piozoledran WP3 strain was added to the high-pressure vessel, wherein the concentration of Shewanella piozoledran WP3 strain in the culture solution was 1X 106CFU/ml, the mass of the added culture solution is 12 percent of the mass of the titanium gypsum, namely the mass of the added culture solution is 12 Kg. The hydrostatic pressure of the high-pressure container is controlled to be 1-5 MPa, and the temperature in the high-pressure container is controlled to be 10-15 DEG CAfter 72h of reaction, Fe in titanium gypsum3+And reducing completely to form a titanium gypsum matrix.
S2 dehydration treatment: the titanium gypsum matrix is separated from the high-pressure container and is in the normal-pressure environment, and the Shewanella piezotolerans WP3 strain loses the reduction activity in the normal-pressure environment. And (3) standing the titanium gypsum matrix for 2 days at normal temperature and normal pressure until the water content of the titanium gypsum matrix is reduced to be below 5%.
S3 magnetic separation treatment: magnetically separating the dehydrated titanium gypsum to remove Fe in the titanium gypsum3+Reducing the formed magnetite particles to form titanium gypsum after impurity removal.
The water consumption of the titanium gypsum standard consistency treated by the steps is reduced from 230g to 207g, the compressive strength in 2 hours is 4.1MPa, and the flexural strength is 2.1 MPa.
EXAMPLE five
S1 reduction treatment: 100Kg of titanium gypsum was placed in a high-pressure vessel, and a culture solution of Shewanella piozoledran WP3 strain was added to the high-pressure vessel, wherein the concentration of Shewanella piozoledran WP3 strain in the culture solution was 1X 108CFU/ml, the mass of the added culture solution is 5 percent of that of the titanium gypsum, namely the mass of the added culture solution is 5 Kg. Controlling the hydrostatic pressure of the high-pressure container to be 1-5 MPa, controlling the temperature in the high-pressure container to be 10-15 ℃, and reacting for 72 hours to obtain Fe in the titanium gypsum3+And reducing completely to form a titanium gypsum matrix.
S2 dehydration treatment: the titanium gypsum matrix is separated from the high-pressure container and is in the normal-pressure environment, and the Shewanella piezotolerans WP3 strain loses the reduction activity in the normal-pressure environment. And (3) standing the titanium gypsum matrix for 2 days at normal temperature and normal pressure until the water content of the titanium gypsum matrix is reduced to be below 5%.
S3 magnetic separation treatment: magnetically separating the dehydrated titanium gypsum to remove Fe in the titanium gypsum3+Reducing the formed magnetite particles to form titanium gypsum after impurity removal.
The water consumption of the titanium gypsum standard consistency treated by the steps is reduced from 230g to 202g, the 2-hour compressive strength is 4.2MPa, and the flexural strength is 2.2 MPa.
The titanium gypsum is recycled by adopting the methodFe in titanium gypsum3+The biochemical treatment method is adopted to realize reduction, no pollution is caused, the processes of dehydration treatment and magnetic separation treatment are simple, and a large amount of energy is not required to be consumed, so that the method for biochemically removing impurities from the titanium gypsum can be widely applied.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (9)

1. A method for biochemically removing impurities from titanium gypsum is characterized by comprising the following steps:
s1 reduction treatment: adding iron reducing bacteria into the titanium gypsum to reduce Fe in the titanium gypsum3+Reducing to magnetite to prepare a titanium gypsum matrix;
s2 dehydration treatment: the titanium gypsum matrix loses water at normal temperature and normal pressure until the water content in the titanium gypsum matrix is below 5 percent;
s3 magnetic separation treatment: and removing iron impurities from the dehydrated titanium gypsum through magnetic separation.
2. The method for biochemically removing impurities from titanium gypsum according to claim 1, wherein the iron-reducing bacteria in the S1 reduction process are Shewanella pictotolerans WP3 of Shewanella, and the Shewanella pictotolerans WP3 strain reduces Fe in titanium gypsum in a high pressure vessel3+。
3. The method for biochemically removing impurities from titanium gypsum according to claim 2, wherein the iron-reducing bacteria added in the S1 reduction treatment is a culture solution of Shewanella pictotolerans WP3 strain, and the concentration of Shewanella pictotolerans WP3 strain in the culture solution is 106～108CFU/ml, wherein the mass of the culture solution added in the S1 reduction treatment is 5-12% of the mass of the titanium gypsum.
4. The method for biochemically removing impurities from titanium gypsum according to claim 3, wherein the concentration of Shewanella piozoledran WP3 strain in the culture solution added in the S1 reduction treatment is 1.5 x 107CFU/ml, wherein the mass of the culture solution is 10% of that of the titanium gypsum.
5. The method for biochemically removing impurities from titanium gypsum according to claim 2, wherein the temperature in the high-pressure container is 10-15 ℃ in the S1 reduction treatment.
6. The method for biochemically removing impurities from titanium gypsum according to claim 2, wherein in the S1 reduction treatment, the hydrostatic pressure in the high-pressure container is 1-5 MPa.
7. The method for biochemically removing impurities from titanium gypsum according to claim 2, wherein in the S1 reduction treatment, the reaction time of the Shewanella piozotolerans WP3 strain and the titanium gypsum in a high-pressure container is 48-72 h.
8. The method for biochemically removing impurities from titanium gypsum according to claim 1, wherein in the S1 reduction treatment, the iron content in the raw material titanium gypsum is 8-13%.
9. The method for biochemically removing impurities from titanium gypsum according to claim 1, wherein the S2 dehydration treatment is to allow the titanium gypsum matrix to stand at normal temperature and pressure for 24-48 hours until the water content in the titanium gypsum matrix is less than 5%.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0424636D0 (en) * 2004-11-09 2004-12-08 Univ Manchester Use of bacteria to produce spinel nanoparticles
WO2011003075A1 (en) * 2009-07-02 2011-01-06 Allegheny-Singer Research Institute Biofilm remediation of acid mine drainage
CN105502464A (en) * 2015-12-15 2016-04-20 合肥学院 Separation and removal technology of iron element in titanium gypsum
CN111893113A (en) * 2020-07-09 2020-11-06 广东省生态环境技术研究所 Biological nano magnetite and preparation method and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0424636D0 (en) * 2004-11-09 2004-12-08 Univ Manchester Use of bacteria to produce spinel nanoparticles
WO2011003075A1 (en) * 2009-07-02 2011-01-06 Allegheny-Singer Research Institute Biofilm remediation of acid mine drainage
CN105502464A (en) * 2015-12-15 2016-04-20 合肥学院 Separation and removal technology of iron element in titanium gypsum
CN111893113A (en) * 2020-07-09 2020-11-06 广东省生态环境技术研究所 Biological nano magnetite and preparation method and application thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
刘邓: ""不同厌氧微生物功能群对粘土矿物结构Fe（Ⅲ）的还原作用及其矿物转变"", no. 5, pages 76 - 78 *
刘邓: ""不同厌氧微生物功能群对粘土矿物结构Fe(III)的还原作用及其矿物转变"", 《中国博士学位论文全文数据库》, no. 5, pages 76 - 81 *
张伟;刘同旭;李芳柏;李晓敏;: "铁还原菌介导的氧化铁还原与硝酸盐还原的竞争效应研究", no. 01 *

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