Preparation method of tungsten tailing-based geopolymer

Abstract

The invention relates to a preparation technology of building materials, in particular to a preparation method of a tungsten tailing-based geopolymer. The geopolymer is prepared by taking tungsten tailings and fly ash as main raw materials in a water adding integrated manner. The method comprises the following steps of: respectively carrying out roasting activation treatment on Na2CO3, tungsten tailings and fly ash to respectively generate roasting products taking Na6.8 (Al6.3Si9.7O32) with better activity as a main phase (Na6.8 (Al6.3Si9.7O32) is dissolved in water to form simple silicate and aluminate), grinding and well mixing the two roasting products, directly adding water, mixing and stirring, and carrying out sample preparation and maintenance to obtain the tungsten tailing-based geopolymer with high mechanical properties. The lowest compressive strength of the geopolymer can reach 110 MPa after the geopolymer is maintained for 28 days. The preparation process is safer, simpler, more convenient and high in operability.

Description

technical field

[0001] The invention relates to the preparation technology of building materials, in particular to a preparation method of tungsten tailings base polymer. Background technique

[0002] Geopolymers are a kind of inorganic polymer structure gelling materials formed by silicon-oxygen tetrahedrons and aluminum-oxygen tetrahedrons. They were first developed by Professor J. Davidovits in France in the late 1970s. Because these materials have a three-dimensional network Polymeric structure, so the physical and chemical properties are stable, with high strength, high temperature resistance, acid and alkali corrosion resistance and other excellent properties, so geopolymers have great application potential as building materials.

[0003] Tungsten tailings are the main solid waste produced in the beneficiation process of tungsten ore. Due to the low content of valuable metals in tungsten ore, the utilization rate of tungsten ore in the beneficiation process is low, res...

Examples

Embodiment 1

[0027] A preparation method of tungsten tailings base polymer:

[0028] (1) Combine tungsten tailings, fly ash and Na 2 CO 3 Grind separately and pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh. Take 100 grams of tungsten tailings powder and 40 grams of Na 2 CO 3 The powder is mixed evenly, 100 grams of fly ash powder and 40 grams of Na 2 CO 3 The powder is mixed evenly; then the tungsten tailings powder and Na 2 CO 3 The powder mixture was calcined at 800 °C for 1 h, and the fly ash powder and Na 2 CO 3 The powder mixture was calcined at 900°C for 1 hour and set aside;

[0029] (2) Put the two calcined products obtained in step (1) into a ball mill and grind them finely, pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh, and then mix them uniformly to form a geopolymer precursor;

[0030] (3) Add water to the geopolymer precursor in step (2), the mass ratio of water and geopolymer precursor is 1:...

Embodiment 2

[0032] A preparation method of tungsten tailings base polymer:

[0033] (1) Combine tungsten tailings, fly ash and Na 2 CO 3Grind separately and pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh. Take 100 grams of tungsten tailings powder and 40 grams of Na 2 CO 3 The powder is mixed evenly, 100 grams of fly ash powder and 40 grams of Na 2 CO 3 The powder is mixed evenly; then the tungsten tailings powder and Na 2 CO 3 The powder mixture was calcined at 900°C for 1 h, and the fly ash powder and Na 2 CO 3 The powder mixture was calcined at 1000°C for 1 hour and set aside;

[0034] (2) Put the two calcined products obtained in step (1) into a ball mill and grind them finely, pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh, and then mix them uniformly to form a geopolymer precursor;

[0035] (3) Add water to the geopolymer precursor in step (2), the mass ratio of water and geopolymer precursor is 1:...

Embodiment 3

[0037] A preparation method of tungsten tailings base polymer:

[0038] (1) Combine tungsten tailings, fly ash and Na 2 CO 3 Grind separately and pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh. Take 100 grams of tungsten tailings powder and 30 grams of Na 2 CO 3 The powder is mixed evenly, 100 grams of fly ash powder and 50 grams of Na 2 CO 3 The powder is mixed evenly; then the tungsten tailings powder and Na 2 CO 3 The powder mixture was calcined at 800 °C for 1 h, and the fly ash powder and Na 2 CO 3 The powder mixture was calcined at 900°C for 1 hour and set aside;

[0039] (2) Put the two calcined products obtained in step (1) into a ball mill and grind them finely, pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh, and then mix them uniformly to form a geopolymer precursor;

[0040] (3) Add water to the geopolymer precursor in step (2), the mass ratio of water and geopolymer precursor is 1:...

technical field

[0001] The invention relates to the preparation technology of building materials, in particular to a preparation method of tungsten tailings base polymer. Background technique

[0002] Geopolymers are a kind of inorganic polymer structure gelling materials formed by silicon-oxygen tetrahedrons and aluminum-oxygen tetrahedrons. They were first developed by Professor J. Davidovits in France in the late 1970s. Because these materials have a three-dimensional network Polymeric structure, so the physical and chemical properties are stable, with high strength, high temperature resistance, acid and alkali corrosion resistance and other excellent properties, so geopolymers have great application potential as building materials.

[0003] Tungsten tailings are the main solid waste produced in the beneficiation process of tungsten ore. Due to the low content of valuable metals in tungsten ore, the utilization rate of tungsten ore in the beneficiation process is low, res...

Examples

Embodiment 1

[0027] A preparation method of tungsten tailings base polymer:

[0028] (1) Combine tungsten tailings, fly ash and Na 2 CO 3 Grind separately and pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh. Take 100 grams of tungsten tailings powder and 40 grams of Na 2 CO 3 The powder is mixed evenly, 100 grams of fly ash powder and 40 grams of Na 2 CO 3 The powder is mixed evenly; then the tungsten tailings powder and Na 2 CO 3 The powder mixture was calcined at 800 °C for 1 h, and the fly ash powder and Na 2 CO 3 The powder mixture was calcined at 900°C for 1 hour and set aside;

[0029] (2) Put the two calcined products obtained in step (1) into a ball mill and grind them finely, pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh, and then mix them uniformly to form a geopolymer precursor;

[0030] (3) Add water to the geopolymer precursor in step (2), the mass ratio of water and geopolymer precursor is 1:...

Embodiment 2

[0032] A preparation method of tungsten tailings base polymer:

[0033] (1) Combine tungsten tailings, fly ash and Na 2 CO 3Grind separately and pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh. Take 100 grams of tungsten tailings powder and 40 grams of Na 2 CO 3 The powder is mixed evenly, 100 grams of fly ash powder and 40 grams of Na 2 CO 3 The powder is mixed evenly; then the tungsten tailings powder and Na 2 CO 3 The powder mixture was calcined at 900°C for 1 h, and the fly ash powder and Na 2 CO 3 The powder mixture was calcined at 1000°C for 1 hour and set aside;

[0034] (2) Put the two calcined products obtained in step (1) into a ball mill and grind them finely, pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh, and then mix them uniformly to form a geopolymer precursor;

[0035] (3) Add water to the geopolymer precursor in step (2), the mass ratio of water and geopolymer precursor is 1:...

Embodiment 3

[0037] A preparation method of tungsten tailings base polymer:

[0038] (1) Combine tungsten tailings, fly ash and Na 2 CO 3 Grind separately and pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh. Take 100 grams of tungsten tailings powder and 30 grams of Na 2 CO 3 The powder is mixed evenly, 100 grams of fly ash powder and 50 grams of Na 2 CO 3 The powder is mixed evenly; then the tungsten tailings powder and Na 2 CO 3 The powder mixture was calcined at 800 °C for 1 h, and the fly ash powder and Na 2 CO 3 The powder mixture was calcined at 900°C for 1 hour and set aside;

[0039] (2) Put the two calcined products obtained in step (1) into a ball mill and grind them finely, pass through a 100-mesh sieve to obtain a powder with a particle size below 100 mesh, and then mix them uniformly to form a geopolymer precursor;

[0040] (3) Add water to the geopolymer precursor in step (2), the mass ratio of water and geopolymer precursor is 1:...

Images