Method for preparing basalt porous heat-preserving material

Abstract

A method for preparing a basalt porous heat-preserving material includes the steps that basalt, screen glass, calcium carbonate, silicon carbide, manganese oxide, magnesium carbonate and sodium silicate are ball-milled to obtain batch; then the batch is contained in a mould and heated, foamed, cooled and annealed to room temperature, and the basalt porous heat-preserving material is obtained. By means of the method, waste can be used easily, the environment is protected, the prepared high-strength porous material is low in foaming temperature, basalt directly serves as the main material, the preparation process is simple, and the prepared porous heat-preserving material is high in structural strength, low in water absorbing rate, small in density and low in heat conductive coefficient. Production cost of the foaming porous material can be effectively reduced, the environment is protected, waste is turned into wealth, and economic benefits and environment protection benefits are obvious.

Description

technical field

[0001] The invention relates to a method for manufacturing a porous thermal insulation material, in particular to a method for preparing a porous thermal insulation material by using basalt. Background technique

[0002] Basalt is solid or powdery waste that is discharged after mining and sorting ores and cannot be used temporarily, including basalt tailings and dressing plant tailings, among which mine tailings include the associated surrounding rocks that have been mined and those that have been removed in the middle The low-grade ore; the tailings of the dressing plant include the mineral waste (tailings) discharged after the ore is mechanically washed by a certain process, and these tailings are transported to the tailings storage by pipelines. For this reason, a large amount of farmland and forest land have been occupied, and the ecology has been damaged, which is difficult to restore.

[0003] The chemical components in basalt mines in my country mainl...

Examples

Embodiment 1

[0022] 1) First, use a jaw crusher to crush basalt into basalt particles smaller than 2mm, then clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and grid, and sort out the screen glass Broken into screen glass particles smaller than 2mm;

[0023] 2) Then, by mass fraction, 65% basalt particles, 25% screen glass particles, 1% calcium carbonate, 1.5% silicon carbide, 2% manganese oxide, 0.5% magnesium carbonate and 5% silicic acid Sodium is put into a ball mill and ball milled to 150 mesh to obtain a uniformly mixed batch;

[0024] 3) Finally, put the uniformly mixed ingredients into the mold, rise from room temperature to 600°C at a heating rate of 8°C / min and keep warm for 20 minutes; ℃ and keep it warm for 35 minutes for foaming, then cool it to 650 ℃ at a cooling rate of 20 ℃ / min and keep it warm for 30 minutes;

[0025] The test-related properties are: apparent density: 0.25g / cm 3 ; Average cell diamete...

Embodiment 2

[0027] 1) First, use a jaw crusher to crush basalt into basalt particles smaller than 2mm, then clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and grid, and sort out the screen glass Broken into screen glass particles smaller than 2mm;

[0028] 2) Then, by mass fraction, 75% basalt particles, 15% screen glass particles, 1.5% calcium carbonate, 1% silicon carbide, 0.5% manganese oxide, 1.5% magnesium carbonate and 5.5% silicic acid Sodium is put into a ball mill and ball milled to 150 mesh to obtain a uniformly mixed batch;

[0029] 3) Finally, put the uniformly mixed ingredients into the mold, raise the temperature from room temperature to 600°C at a rate of 8°C / min and keep it warm for 30 minutes; then increase the rate of temperature from 600°C to 1100 ℃ and keep it warm for 25 minutes for foaming, then cool it to 650°C at a cooling rate of 20°C / min and keep it warm for 20 minutes; then cool down and ann...

Embodiment 3

[0032] 1) First, use a jaw crusher to crush basalt into basalt particles smaller than 2mm, then clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and grid, and sort out the screen glass Broken into screen glass particles smaller than 2mm;

[0033] 2) Then, by mass fraction, 85% basalt particles, 10% screen glass particles, 0.5% calcium carbonate, 0.5% silicon carbide, 0.05% manganese oxide, 2% magnesium carbonate and 1.95% silicic acid Sodium is put into a ball mill and ball milled to 150 mesh to obtain a uniformly mixed batch;

[0034] 3) Finally, put the uniformly mixed ingredients into the mold, raise the temperature from room temperature to 600°C at a rate of 8°C / min and keep it warm for 40 minutes; then increase the rate of temperature from 600°C to 1150 ℃ and keep it warm for 20 minutes for foaming, then cool it to 650 ℃ at a cooling rate of 20 ℃ / min, and keep it warm for 40 minutes;

[0035] The test-re...

technical field

[0001] The invention relates to a method for manufacturing a porous thermal insulation material, in particular to a method for preparing a porous thermal insulation material by using basalt. Background technique

[0002] Basalt is solid or powdery waste that is discharged after mining and sorting ores and cannot be used temporarily, including basalt tailings and dressing plant tailings, among which mine tailings include the associated surrounding rocks that have been mined and those that have been removed in the middle The low-grade ore; the tailings of the dressing plant include the mineral waste (tailings) discharged after the ore is mechanically washed by a certain process, and these tailings are transported to the tailings storage by pipelines. For this reason, a large amount of farmland and forest land have been occupied, and the ecology has been damaged, which is difficult to restore.

[0003] The chemical components in basalt mines in my country mainl...

Examples

Embodiment 1

[0022] 1) First, use a jaw crusher to crush basalt into basalt particles smaller than 2mm, then clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and grid, and sort out the screen glass Broken into screen glass particles smaller than 2mm;

[0023] 2) Then, by mass fraction, 65% basalt particles, 25% screen glass particles, 1% calcium carbonate, 1.5% silicon carbide, 2% manganese oxide, 0.5% magnesium carbonate and 5% silicic acid Sodium is put into a ball mill and ball milled to 150 mesh to obtain a uniformly mixed batch;

[0024] 3) Finally, put the uniformly mixed ingredients into the mold, rise from room temperature to 600°C at a heating rate of 8°C / min and keep warm for 20 minutes; ℃ and keep it warm for 35 minutes for foaming, then cool it to 650 ℃ at a cooling rate of 20 ℃ / min and keep it warm for 30 minutes;

[0025] The test-related properties are: apparent density: 0.25g / cm 3 ; Average cell diamete...

Embodiment 2

[0027] 1) First, use a jaw crusher to crush basalt into basalt particles smaller than 2mm, then clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and grid, and sort out the screen glass Broken into screen glass particles smaller than 2mm;

[0028] 2) Then, by mass fraction, 75% basalt particles, 15% screen glass particles, 1.5% calcium carbonate, 1% silicon carbide, 0.5% manganese oxide, 1.5% magnesium carbonate and 5.5% silicic acid Sodium is put into a ball mill and ball milled to 150 mesh to obtain a uniformly mixed batch;

[0029] 3) Finally, put the uniformly mixed ingredients into the mold, raise the temperature from room temperature to 600°C at a rate of 8°C / min and keep it warm for 30 minutes; then increase the rate of temperature from 600°C to 1100 ℃ and keep it warm for 25 minutes for foaming, then cool it to 650°C at a cooling rate of 20°C / min and keep it warm for 20 minutes; then cool down and ann...

Embodiment 3

[0032] 1) First, use a jaw crusher to crush basalt into basalt particles smaller than 2mm, then clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and grid, and sort out the screen glass Broken into screen glass particles smaller than 2mm;

[0033] 2) Then, by mass fraction, 85% basalt particles, 10% screen glass particles, 0.5% calcium carbonate, 0.5% silicon carbide, 0.05% manganese oxide, 2% magnesium carbonate and 1.95% silicic acid Sodium is put into a ball mill and ball milled to 150 mesh to obtain a uniformly mixed batch;

[0034] 3) Finally, put the uniformly mixed ingredients into the mold, raise the temperature from room temperature to 600°C at a rate of 8°C / min and keep it warm for 40 minutes; then increase the rate of temperature from 600°C to 1150 ℃ and keep it warm for 20 minutes for foaming, then cool it to 650 ℃ at a cooling rate of 20 ℃ / min, and keep it warm for 40 minutes;

[0035] The test-re...