CN114455930B - Preparation method of dolomite composite material - Google Patents
Preparation method of dolomite composite material Download PDFInfo
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- CN114455930B CN114455930B CN202210027807.9A CN202210027807A CN114455930B CN 114455930 B CN114455930 B CN 114455930B CN 202210027807 A CN202210027807 A CN 202210027807A CN 114455930 B CN114455930 B CN 114455930B
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- dolomite
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/002—Component parts of these vessels not mentioned in B01J3/004, B01J3/006, B01J3/02 - B01J3/08; Measures taken in conjunction with the process to be carried out, e.g. safety measures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/06—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
- B01J3/065—Presses for the formation of diamonds or boronitrides
- B01J3/067—Presses using a plurality of pressing members working in different directions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
- B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould
- B30B11/06—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould each charge of the material being compressed against the previously formed body
Abstract
The invention provides a preparation method of a dolomite composite material. The preparation method of the dolomite composite material comprises the following steps: s1, preparing raw materials: (1) Dolomite, a dispersant, zirconia powder and water glass liquid; s2, a manufacturing process: (1) Taking 300g of dolomite, putting the dolomite into a crusher for crushing, and then filtering the dolomite through a filter screen to obtain dolomite powder, wherein the granularity of the dolomite powder is 0.40-40.15 mu m; (2) Pouring the crushed dolomite powder into a disc type stirring mill, and then adding water glass liquid and a dispersing agent according to a certain proportion. The preparation method of the dolomite composite material provided by the invention has the advantages that the heat insulation performance of the lining pipe is effectively improved on the basis of not influencing the pressure transmission performance of dolomite, so that the production capacity is increased, the consumption is reduced, and the energy-saving and synergistic production is realized.
Description
Technical Field
The invention belongs to the technical field of pressure transmission and heat insulation composite materials of superhard materials, and particularly relates to a preparation method of a dolomite composite material.
Background
The pyrophyllite composite block is the most widely used material for synthesizing superhard material by a cubic press. The existing pyrophyllite composite block is formed by embedding a dolomite lining pipe in the pyrophyllite block. The dolomite lining pipe plays a role in pressure transmission and heat preservation, dolomite expands at high temperature and high pressure, plays a certain pressurization effect, has good heat preservation, is widely applied to the field of synthesizing superhard materials, and discloses a method for preparing a carbon/silicon/calcium-magnesium composite material by utilizing rice husks/dolomite in the related technology: mixing dolomite and rice hulls, and stirring to 40-100 meshes to obtain mixed powder; pyrolyzing the obtained mixed powder at 300-500 ℃ for 1-5 h, and then cooling to room temperature to obtain the carbon/silicon/calcium-magnesium composite material; the addition of the dolomite improves the bed porosity in the rice hull carbonization process, reduces the bed pressure drop, enables one of the carbonized products CO2 to escape more easily, and enables the rice hull carbonization process to be more complete; and the dolomite reacts with the rice husk carbon in the subsequent reaction to generate the carbon/silicon/calcium magnesium composite material; the method for preparing the carbon/silicon/calcium-magnesium composite material has the advantages of simple steps, cheap and easily-obtained raw materials and convenient popularization and application of the process, and after the rice hulls are prepared into the biochar, the damage of the biochar to the ecological environment can be reduced, and the rice hulls can be recycled.
However, the structure has disadvantages that as the size of the cubic press is increased, the synthesis cavity of the pyrophyllite composite block is enlarged, the heat energy required by conversion of the superhard material is increased, and the dolomite lining pipe needs to have a better heat insulation effect to meet the conversion energy of the superhard material, so that in order to stably synthesize the superhard material, the wall thickness of the dolomite lining pipe is generally increased, the effective cavity for synthesis of the superhard material is reduced, and the loss of production benefits is relatively caused.
Therefore, there is a need to provide a new method for preparing dolomite composite material to solve the above technical problems
Disclosure of Invention
The invention aims to provide a preparation method of a dolomite composite material, which can effectively increase the heat insulation performance of a lining pipe on the basis of not influencing the pressure transmission performance of dolomite, thereby achieving the purposes of increasing productivity, reducing consumption and realizing energy-saving and synergistic production.
In order to solve the technical problems, the preparation method of the dolomite composite material provided by the invention comprises the following steps:
s1, preparing raw materials:
(1) Dolomite, a dispersant, zirconia powder and water glass liquid;
s2, a manufacturing process:
(1) Taking 300g of dolomite, putting the dolomite into a crusher for crushing, and then filtering the dolomite through a filter screen to obtain dolomite powder, wherein the granularity of the dolomite powder is 0.40-40.15 mu m;
(2) Pouring the crushed dolomite powder into a disc type stirring and grinding device, adding water glass liquid and a dispersing agent according to a certain proportion, then adding zirconia powder according to a certain proportion, and mixing and stirring at a rotating speed in the disc type stirring and grinding device to obtain dolomite composite powder;
(3) Placing the mixed dolomite composite powder into a mould on a four-column hydraulic press, and pressing into a dolomite lined pipe embryo by the four-column hydraulic press;
(4) Drying the pressed dolomite inner liner tube embryo in a drying box at the drying temperature of 300 ℃;
(5) Pressing and inlaying the dried dolomite lining pipe into the pyrophyllite block to prepare a pyrophyllite composite block;
the dispersant is sodium polyacrylate, and the dosage proportion of the dispersant is 0-0.9%.
The dosage proportion of the zirconia powder is 10-25%.
The dosage proportion of the water glass liquid is 5-10%.
As a further aspect of the invention, the chemical composition of the dolomite comprises 1.22% MgO2 (magnesium peroxide), 8.04% CaO2 (calcium peroxide), 7.04% SiO2 (silica), 0.46% Al2O3 (alumina), 0.16% TFe2O3, 0.33% K2O (potassium oxide), 0.006% TiO2 (titanium dioxide), 0.006% P2O5 (phosphorus pentoxide) and a loss on ignition of 43.00%.
As a further scheme of the invention, the rotating speed of the pulverizer is 1200rpm, and the mixing and stirring time is 3-4h.
Compared with the prior art, the preparation method of the dolomite composite material provided by the invention has the following beneficial effects:
the invention provides a preparation method of a dolomite composite material, which comprises the following steps:
1. on the basis of not influencing the dolomite pressure transmission performance, the heat preservation performance of the lining pipe is effectively increased, so that the wall thickness of the lining pipe is not required to be thickened, the heat insulation effect of the lining pipe after the cavity is enlarged when the superhard material is synthesized is well solved, meanwhile, the effective cavity space for synthesizing the superhard material is enlarged, the capacity is increased, the consumption is reduced, and the advantages of energy conservation and synergistic production are realized.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view showing the amount of the dispersant used in the present invention.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic view illustrating an amount of a dispersant used in the present invention. The preparation method of the dolomite composite material comprises the following steps:
s1, preparing raw materials:
(1) Dolomite, a dispersant, zirconia powder and water glass liquid;
s2, a manufacturing process:
(1) Taking 300g of dolomite, putting the dolomite into a crusher for crushing, and then filtering the dolomite through a filter screen to obtain dolomite powder, wherein the granularity of the dolomite powder is 0.40-40.15 mu m;
(2) Pouring the crushed dolomite powder into a disc type stirring and grinding device, adding water glass liquid and a dispersing agent according to a certain proportion, then adding zirconia powder according to a certain proportion, and mixing and stirring at a rotating speed in the disc type stirring and grinding device to obtain dolomite composite powder;
(3) Placing the mixed dolomite composite powder into a mould on a four-column hydraulic press, and pressing into a dolomite lined pipe embryo by the four-column hydraulic press;
(4) Drying the pressed dolomite inner liner tube embryo in a drying box at the drying temperature of 300 ℃;
(5) Pressing and inlaying the dried dolomite lining pipe into the pyrophyllite block to prepare a pyrophyllite composite block;
the dispersant is sodium polyacrylate, and the dosage proportion of the dispersant is 0-0.9%.
The dosage proportion of the zirconia powder is 10-25%.
The dosage proportion of the water glass liquid is 5-10%.
The chemical composition of the dolomite comprises 1.22% 2 (magnesium peroxide), caO 8.04% 2 (calcium peroxide), 7.04% SiO 2 (silica), 0.46% of Al 2 O 3 (alumina), 0.16% TFe 2 O 3 、0.33％K 2 O (potassium oxide), 0.006% TiO 2 (titanium dioxide), 0.006% P 2 O 5 (phosphorus pentoxide) and loss on ignition 43.00%.
The rotating speed of the pulverizer is 1200rpm, and the mixing and stirring time is 3-4h.
The working principle of the preparation method of the dolomite composite material provided by the invention is as follows:
on the basis of not influencing the dolomite pressure transmission performance, the heat preservation performance of the lining pipe is effectively increased, so that the wall thickness of the lining pipe is not required to be thickened, the heat insulation effect of the lining pipe after the cavity is enlarged when the superhard material is synthesized is well solved, meanwhile, the effective cavity space for synthesizing the superhard material is enlarged, the capacity is increased, the consumption is reduced, and the advantages of energy conservation and synergistic production are realized.
Example 1:
the preparation method of the dolomite composite material comprises the following steps:
(1) Preparing raw materials: dolomite, a dispersing agent, zirconia powder and water glass liquid;
(2) Taking 300g of dolomite, putting the dolomite into a crusher for crushing, and then filtering the dolomite through a filter screen to obtain dolomite powder, wherein the granularity of the dolomite powder is 0.40-40.15 mu m;
(3) Pouring the crushed dolomite powder into a disc type stirring mill, adding 5-10% of water glass liquid and 0-0.9% of dispersing agent according to the proportion, then adding 10-25% of zirconia powder, mixing and stirring at a rotating speed in the disc type stirring mill for 3-4h to obtain dolomite composite powder;
(4) Placing the mixed dolomite composite powder into a mould on a four-column hydraulic press, and pressing into a dolomite lined pipe embryo by the four-column hydraulic press;
(5) Drying the pressed dolomite inner liner tube embryo in a drying box at the drying temperature of 300 ℃;
(6) Pressing and inlaying the baked dolomite lining pipe into the pyrophyllite block to obtain the pyrophyllite composite block.
Under the same condition, the particle size of the dolomite is thinned and gradually tends to a particle size interval along with the increase of the mixing and stirring time, the particle size of the dolomite tends to a stable interval after the mixing and stirring for 3 hours, the influence of the using amount of the dispersing agent on the particle size can be finally judged, and when the using amount of the dispersing agent is within the range of 0-0.9%, the dolomite sample integrally shows a V-shaped change trend along with the increase of the using amount of the dispersing agent (as shown in figure 1).
Example 2:
the preparation method of the dolomite composite material comprises the following steps:
(1) Preparing raw materials: dolomite, a dispersing agent, zirconia powder and water glass liquid;
(2) Taking 300g of dolomite, putting the dolomite into a crusher for crushing, and then filtering the dolomite through a filter screen to obtain dolomite powder, wherein the granularity of the dolomite powder is 0.40-40.15 mu m;
(3) Pouring the crushed dolomite powder into a disc type stirring mill, adding 5-10% of water glass liquid and 0.5-0.9% of dispersing agent according to the proportion, then adding 10-25% of zirconia powder, mixing and stirring at a rotating speed in the disc type stirring mill for 3-4h to obtain dolomite composite powder;
(4) Placing the mixed dolomite composite powder into a mould on a four-column hydraulic press, and pressing into a dolomite lined pipe embryo by the four-column hydraulic press;
(5) Drying the pressed dolomite inner liner tube embryo in a drying box at the drying temperature of 300 ℃;
(6) Pressing and inlaying the baked dolomite lining pipe into the pyrophyllite block to obtain the pyrophyllite composite block.
Under the same condition, the granularity of the dolomite is thinned and gradually tends to a grain size interval along with the increase of the mixing and stirring time, the grain size of the dolomite tends to a stable interval after the mixing and stirring for 3 hours, the influence of the dosage of the dispersant on the grain size can be finally judged, and when the dosage of the dispersant is within the range of 0.5-0.9%, the non-positive effects of the effect of reducing the surface energy and increasing the viscosity of the dispersant by adsorption are increased, so that the mixing and stirring effect is deteriorated, and the dolomite grains become coarse (as shown in figure 1).
Example 3:
the preparation method of the dolomite composite material comprises the following steps:
the preparation method of the dolomite composite material comprises the following steps:
(1) Preparing raw materials: dolomite, a dispersing agent, zirconia powder and water glass liquid;
(2) Taking 300g of dolomite to be placed into a crusher for crushing, and then filtering through a filter screen to obtain dolomite powder, wherein the granularity of the dolomite powder is 0.40-40.15 mu m;
(3) Pouring the crushed dolomite powder into a disc type stirring mill, adding 5-10% of water glass liquid and 0-0.5% of dispersing agent according to the proportion, then adding 10-20% of zirconia powder, mixing and stirring at a rotating speed in the disc type stirring mill for 3-4h to obtain dolomite composite powder;
(4) Placing the mixed dolomite composite powder into a mould on a four-column hydraulic press, and pressing into a dolomite lined pipe embryo by the four-column hydraulic press;
(5) Drying the pressed dolomite lining tube embryo in a drying box at the drying temperature of 300 ℃;
(6) Pressing and inlaying the baked dolomite lining pipe into the pyrophyllite block to obtain the pyrophyllite composite block.
Under the same condition, the particle size of the dolomite is thinned and gradually approaches to a particle size interval along with the increase of the mixing and stirring time, the particle size of the dolomite approaches to a stable interval after the mixing and stirring time is 3 hours, the influence of the using amount of the dispersing agent on the particle size can be finally judged, when the using amount of the dispersing agent is in the range of 0.5-0.9%, the dispersing agent plays a positive role in improving the rheological property and reducing the particle hardness, and reaches the optimum value when the using amount of the dispersing agent is 0.5%, and the particle size of the dolomite is the minimum, so that the optimum choice is that the using amount of the sodium polyacrylate of the dispersing agent is 0.5% of the mass of the dolomite after the mixing and stirring time is 3 hours (as shown in figure 1).
Claims (3)
1. The preparation method of the dolomite composite material is characterized by comprising the following steps:
s1, preparing raw materials:
(1) Dolomite, a dispersant, zirconia powder and water glass liquid;
s2, a manufacturing process:
(1) Taking 300g of dolomite, putting the dolomite into a crusher for crushing, and then filtering the dolomite through a filter screen to obtain dolomite powder, wherein the granularity of the dolomite powder is 0.40-40.15 mu m;
(2) Pouring the crushed dolomite powder into a disc type stirring and grinding device, adding water glass liquid and a dispersing agent according to a certain proportion, then adding zirconia powder according to a certain proportion, and mixing and stirring at a rotating speed in the disc type stirring and grinding device to obtain dolomite composite powder;
(3) Placing the mixed dolomite composite powder into a mould on a four-column hydraulic press, and pressing into a dolomite lined pipe embryo by the four-column hydraulic press;
(4) Drying the pressed dolomite inner liner tube embryo in a drying box at the drying temperature of 300 ℃;
(5) Pressing and inlaying the dried dolomite lining pipe into the pyrophyllite block to prepare a pyrophyllite composite block;
the dispersant is sodium polyacrylate, and the dosage proportion of the dispersant is 0-0.9%;
the dosage proportion of the zirconia powder is 10-25%;
the dosage proportion of the water glass liquid is 5-10%.
2. A process for the preparation of a dolomite composite according to claim 1, wherein the chemical composition of the dolomite comprises 1.22% MgO 2 (magnesium peroxide), 8.04% CaO 2 (calcium peroxide), 7.04% SiO 2 (silica), 0.46% of Al 2 O 3 (alumina), 0.16% TFe 2 O 3 、0.33％K 2 O (potassium oxide), 0.006% TiO 2 (titanium dioxide), 0.006% of P 2 O 5 (phosphorus pentoxide) and loss on ignition 43.00%.
3. A process for the preparation of a dolomite composite according to claim 1, wherein the rotation speed of the pulveriser is 1200rpm and the mixing and stirring time is 3-4h.
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| CN115947612B (en) * | 2022-12-09 | 2023-09-12 | 秦皇岛琨煜晶材科技有限公司 | Pressure transmission medium for high temperature and high pressure |
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| CN1251796A (en) * | 1999-11-22 | 2000-05-03 | 刘彦娥 | Press technology for shaping blocks of composite pyrophyllite-dolomite powder |
| CN1765738A (en) * | 2004-10-29 | 2006-05-03 | 郑州人造金刚石及制品工程技术研究中心 | Medium material for diamond synthesis and medium constituted therefrom |
| KR20090007580A (en) * | 2006-05-01 | 2009-01-19 | 신현오 | Bubble ceramic material with low weight and method for preparing thereof |
| CN109966994A (en) * | 2019-04-26 | 2019-07-05 | 河南省力量钻石股份有限公司 | A kind of diamond synthesizing compound block for transmitting pressure and preparation method thereof |
| CN110981436A (en) * | 2019-12-28 | 2020-04-10 | 郑州博特硬质材料有限公司 | Powder pressing ceramic die for synthesizing superhard material blade and preparation method |
| CN111589372A (en) * | 2020-05-08 | 2020-08-28 | 河南中南工业有限责任公司 | Mixed production process of heating element raw materials of cubic press |
-
2022
- 2022-01-11 CN CN202210027807.9A patent/CN114455930B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1251796A (en) * | 1999-11-22 | 2000-05-03 | 刘彦娥 | Press technology for shaping blocks of composite pyrophyllite-dolomite powder |
| CN1765738A (en) * | 2004-10-29 | 2006-05-03 | 郑州人造金刚石及制品工程技术研究中心 | Medium material for diamond synthesis and medium constituted therefrom |
| KR20090007580A (en) * | 2006-05-01 | 2009-01-19 | 신현오 | Bubble ceramic material with low weight and method for preparing thereof |
| CN109966994A (en) * | 2019-04-26 | 2019-07-05 | 河南省力量钻石股份有限公司 | A kind of diamond synthesizing compound block for transmitting pressure and preparation method thereof |
| CN110981436A (en) * | 2019-12-28 | 2020-04-10 | 郑州博特硬质材料有限公司 | Powder pressing ceramic die for synthesizing superhard material blade and preparation method |
| CN111589372A (en) * | 2020-05-08 | 2020-08-28 | 河南中南工业有限责任公司 | Mixed production process of heating element raw materials of cubic press |
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