CN211770329U - System for use magnesium hydrate as raw materials production fused magnesia - Google Patents
System for use magnesium hydrate as raw materials production fused magnesia Download PDFInfo
- Publication number
- CN211770329U CN211770329U CN201921866882.4U CN201921866882U CN211770329U CN 211770329 U CN211770329 U CN 211770329U CN 201921866882 U CN201921866882 U CN 201921866882U CN 211770329 U CN211770329 U CN 211770329U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- magnesium hydroxide
- electric furnace
- fused magnesia
- suspension roasting
- 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.)
- Active
Links
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model relates to a system for producing fused magnesia by using magnesium hydroxide as raw material, which comprises a filter cake storage bin, a box type feeder, a hammer type crushing drier, a suspension roasting device, a high-temperature high-pressure ball pressing system, a bucket elevator, an electric furnace feeding bin and an electric furnace smelting system; the process comprises the following steps: and feeding magnesium hydroxide filter cakes prepared from seawater or brine into a hammer type crushing dryer through a box feeder for crushing and drying, feeding crushed and dried magnesium hydroxide powder into a suspension roasting device along with drying air for preheating and roasting, feeding the obtained magnesium oxide into a high-temperature high-pressure ball pressing system for circulating hot pressing, storing the obtained magnesium oxide balls into an electric furnace feeding bin through a bucket elevator, and then feeding the magnesium oxide balls into an electric furnace smelting system for smelting to prepare the fused magnesia product. The utility model discloses process flow is short, low in production cost to energy-concerving and environment-protective.
Description
Technical Field
The utility model relates to a magnesian material production technical field especially relates to a system for use magnesium hydrate to produce fused magnesia as raw materials.
Background
Sintering and electric melting are two main processes for preparing magnesia, wherein the sintering process is to calcine natural gas, heavy oil and the like serving as fuels in a refractory kiln at the temperature of 1500-2300 ℃ to produce magnesia; the electric smelting process is to melt the magnesia raw material to more than 3000 ℃ in an electric arc furnace by utilizing electric energy to prepare the electric smelting magnesia product. The main crystal phase periclase crystal grains in the fused magnesia product are coarser, the structure is more compact, the fused magnesia product can still keep stable at the temperature of more than 2300 ℃, the high-temperature strength, the slag resistance, the scouring resistance and the hydration resistance of the fused magnesia product are all superior to those of sintered magnesia, and the large-crystal magnesia product also has special optical performance. The fused magnesium product can be used as a high-quality refractory material in industries such as metallurgy, building materials, glass, cement and the like, and can also be used as a high-end raw material in the fields of electric power, aerospace, national defense, nuclear industry and the like.
At present, the raw materials for producing magnesite in the world mainly comprise natural magnesite and magnesium-rich raw materials extracted from seawater and brine. The Liaoning area of China has high-quality magnesite resources, which become main production bases and export bases of the global magnesite market from the 90 th century, and disordered and extensive mining for a long time leads to ore quality reduction, resource waste, ecological damage and serious environmental pollution. Meanwhile, the seawater and brine resources in China are rich, thousands of tons of magnesium-rich concentrated seawater and brine can be generated every year, and the magnesium hydroxide chemically treated by the seawater and the brine is used as the raw material to prepare the magnesium hydroxide with the purity of more than 98 percent and the volume density of 3.45g/cm3The magnesite product. The prior art for preparing magnesia by taking magnesium hydroxide as a raw material is mainly sintering process, has long process flow and high production cost, and has few domestic related production enterprises.
In recent years, the treatment requirement of furnace flue gas is gradually increased, sulfur dioxide and nitrogen oxides are required to be treated besides dust, and particularly, the nitrogen oxides in a high-temperature furnace adopting a sintering process have high concentration and high treatment cost, so that the production cost of enterprises is greatly increased. The flue gas in the electric furnace production mainly contains dust, and basically has no sulfur dioxide and nitric oxide, meanwhile, the construction of power generation and supply facilities in China is gradually complete, and the price of industrial electricity is gradually reduced, so that the price advantage of the magnesia produced by the electric smelting process is increasingly prominent.
The utility model discloses to magnesite resource starvation, ecological environment pollution scheduling problem, the high-quality rich magnesium raw materials that will make with sea water or brine combines together with electric smelting technology, develops a technology and system that uses magnesium hydrate to produce electric smelting magnesite as the raw materials, is favorable to shortening process flow, promotes product quality, promotes energy-conserving technique, reduction in production cost, has very important meaning to promoting magnesium resource sustainable development and energy-concerving and environment-protective.
Disclosure of Invention
The utility model provides a system for use magnesium hydrate to produce electric smelting magnesite as raw materials to the magnesium hydrate that sea water or brine made is the raw materials, adopts energy-efficient novel electric smelting technology, makes the electric smelting magnesite product of high purity, high density, high added value, and its process flow is short, low in production cost to energy-concerving and environment-protective.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a system for producing fused magnesia by taking magnesium hydroxide as a raw material comprises a filter cake storage bin, a box-type feeder, a hammer type crushing dryer, a suspension roasting device, a high-temperature high-pressure ball pressing system, a bucket elevator, an electric furnace feeding bin and an electric furnace smelting system; the discharge gate of filter cake storehouse links to each other with the feed inlet of box batcher, the feed inlet of hammer crushing dryer is connected to the discharge gate of box batcher, the feed inlet of suspension roasting device is connected to the discharge gate of hammer crushing dryer, the feed inlet of high temperature high pressure ball pressing system is connected to the discharge gate of suspension roasting device, the material loading end of bucket elevator is connected to the discharge gate of high temperature high pressure ball pressing system, the feed inlet in electric stove feed storehouse is connected to the discharge end of bucket elevator, the feed inlet of electric stove system of smelting is connected to the discharge gate in electric stove feed storehouse.
The suspension roasting device is provided with a flue gas outlet connected with a flue gas main pipe, the flue gas main pipe is connected with a drying air inlet of the hammer type crushing dryer through a flue gas conveying pipeline I, and is connected with a flue gas inlet of a flue gas purification system through a flue gas conveying pipeline II, and a clean flue gas outlet of the flue gas purification system is connected with a chimney; the flue gas main pipe is provided with a fan, and the first flue gas conveying pipeline and the second flue gas conveying pipeline are respectively provided with an adjusting valve; and a cold air inlet is also formed in the first flue gas conveying pipeline and is connected with a cold air pipeline, and an adjusting valve is also arranged on the cold air pipeline.
The electric furnace smelting system is provided with a flue gas outlet which is connected with a heat source inlet of the suspension roasting device through a flue gas pipeline.
The suspension roasting device is of a totally enclosed structure, is provided with 3-6 cyclones and is provided with a preheating section and a roasting section.
The suspension roasting device is provided with a set of fuel system.
The high-temperature high-pressure ball pressing system comprises a pre-pressing device and a high-pressure device, the linear pressure of the ball pressing machine is 80-110 kN/cm, a ball groove is almond-shaped or peach-kernel-shaped, and the capacity is 10-20 cm3。
The electric furnace smelting system is provided with a transformer above 4000kVA and an automatic electrode lifting device, and the position of a furnace opening is integrally sealed.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model combines the high-quality magnesium-rich raw material prepared by seawater or brine with the electric smelting process, compared with the traditional sintering magnesia or electric smelting magnesia production process, the advantages of resources and process are fully exerted, the magnesium hydroxide raw material is made into the high-quality electric smelting magnesia product with high added value through the process procedures of drying, roasting to remove bound water, high-temperature ball pressing, electric furnace smelting and the like, the process is simple, the flow is short, the waste heat of the flue gas is fully utilized, the device has good continuity and closure, the environmental pollution is small, and the energy-saving and environment-friendly benefits are remarkable;
2) the box-type feeder can realize uniform and quantitative feeding by adjusting the height of the flashboard and the speed of the conveyer belt, and is suitable for feeding filter cakes with high viscosity and high humidity;
3) the hammer type crushing dryer integrates crushing and drying functions, and utilizes the waste heat of the flue gas of the suspension roasting device, thereby improving the subsequent suspension roasting efficiency and reducing the energy consumption;
4) the utility model adopts the suspension roasting device to remove the bound water of magnesium hydroxide at the temperature of 500-650 ℃, because the roasting temperature is lower, the size of the magnesium oxide crystal grains obtained by decomposition is smaller, and the high-temperature sintering performance is better after ball pressing; the traditional magnesite two-step calcining method for producing magnesite products can produce active magnesium oxide only by light burning at about 900 ℃, magnesium hydroxide begins to decompose and dehydrate at about 300 ℃, and double vacancies can be produced after the dehydration of the hydrated magnesium hydroxide, so that the structure is loose, the defects are increased, and the magnesite products are beneficial to further smelting at high temperature;
5) the suspension roasting device is divided into two sections of preheating and roasting, so that the number of cyclones is reduced, and the suspension roasting device is simple in structure and convenient to operate; the heat source of the suspension roasting device is mainly from the waste heat of the flue gas of the electric furnace, and the flue gas discharged by the suspension roasting device can be used for the second time by the hammer type crushing dryer, so that the production cost and the energy consumption are reduced, and the energy conservation and consumption reduction are realized;
6) the suspension roasting device is not provided with a cooling cylinder, the roasted magnesium oxide is directly hot-pressed without being cooled, the volume shrinkage of the cooled magnesium oxide can be avoided, and the balling volume density can be improved by 0.1-0.3 g/cm compared with the prior art3(ii) a A circulating ball pressing process (the crushed materials after being screened return to a system to press balls again) is adopted, so that the problem that the powder materials are difficult to form balls is solved, and the ball forming rate is improved;
7) the electric furnace smelting system adopts a special electric smelting magnesium transformer above 4000kVA and a novel energy-saving automatic electrode lifting device, so that the electric furnace smelting system has low power consumption, good operating environment and high automation degree in the smelting process;
8) the fused magnesia prepared by the process of the utility model has high purity, good quality and volume density reaching 3.55g/cm3The sintered magnesite and seawater magnesite are superior to those sold in the market at present.
Drawings
Fig. 1 is a schematic structural diagram of a system for producing fused magnesia by using magnesium hydroxide as a raw material.
Fig. 2 is a process flow chart of the system for producing fused magnesia by using magnesium hydroxide as a raw material.
In the figure: 1. filter cake storage bin 2, box feeder 3, hammer type crushing drier 4, suspension roasting device 5, high-temperature high-pressure ball pressing system 6, bucket elevator 7, electric furnace feeding bin 8, electric furnace smelting system 9, fan 10, regulating valve 11, flue gas purification system 12 and chimney
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, the system for producing fused magnesia by using magnesium hydroxide as a raw material according to the present invention comprises a filter cake storage 1, a box feeder 2, a hammer type crushing dryer 3, a suspension roasting device 4, a high temperature and high pressure ball pressing system 5, a bucket elevator 6, an electric furnace feeding bin 7 and an electric furnace smelting system 8; the discharge gate of filter cake silo 1 links to each other with box feeder 2's feed inlet, the feed inlet of hammer crushing dryer 3 is connected to box feeder 2's discharge gate, suspension roasting device 4's feed inlet is connected to hammer crushing dryer 3's discharge gate, high temperature high pressure ball pressing system 5's feed inlet is connected to suspension roasting device 4's discharge gate, bucket elevator 6's material loading end is connected to high temperature high pressure ball pressing system 5's discharge gate, electric stove feed bin 7's feed inlet is connected to bucket elevator 6's discharge end, electric stove melting system 8's feed inlet is connected to electric stove feed bin 7's discharge gate.
The suspension roasting device 4 is provided with a flue gas outlet connected with a flue gas main pipe, the flue gas main pipe is connected with a drying air inlet of the hammer type crushing dryer 3 through a flue gas conveying pipeline I, and is connected with a flue gas inlet of a flue gas purification system 11 through a flue gas conveying pipeline II, and a clean flue gas outlet of the flue gas purification system 11 is connected with a chimney 12; a fan 9 is arranged on the flue gas main pipe, and regulating valves 10 are respectively arranged on the first flue gas conveying pipeline and the second flue gas conveying pipeline; and a cold air inlet is also formed in the first flue gas conveying pipeline and connected with a cold air pipeline, and an adjusting valve 10 is also arranged on the cold air pipeline.
The electric furnace smelting system 8 is provided with a flue gas outlet and is connected with a heat source inlet of the suspension roasting device 4 through a flue gas pipeline.
The technical process of the system for producing the fused magnesia by taking the magnesium hydroxide as the raw material is as follows: and feeding a magnesium hydroxide filter cake prepared from seawater or brine into a hammer type crushing dryer 3 through a box feeder 2 for crushing and drying, feeding crushed and dried magnesium hydroxide powder into a suspension roasting device 4 along with drying air for preheating and roasting, feeding obtained magnesium oxide into a high-temperature high-pressure ball pressing system 5 for circulating hot pressing, storing the obtained magnesium oxide balls into an electric furnace feeding bin 7 through a bucket elevator 6, and then feeding the magnesium oxide balls into an electric furnace smelting system 8 for smelting to prepare the fused magnesia product.
The hammer type crushing dryer 3 dries the material by using the waste heat of the flue gas of the suspension roasting device 4, and then the drying air returns to the suspension roasting device 4 again; the water content of the dried magnesium hydroxide fine powder is less than or equal to 5 percent.
The suspension roasting device 4 is of a totally enclosed structure and is provided with 3-6 cyclones, a preheating section and a roasting section, wherein the roasting temperature is 500-650 ℃, and the discharge temperature is 300-450 ℃.
The heat source of the suspension roasting device 4 mainly comes from the waste heat of the flue gas of the electric furnace, and the suspension roasting device 4 is provided with a set of fuel system which is used for adjusting the temperature during roasting; and a part of the flue gas discharged by the suspension roasting device 4 is used as a drying heat source of the hammer type crushing dryer 3, and the residual flue gas is discharged after being treated to reach the standard.
The magnesium oxide obtained by roasting in the suspension roasting device 4 directly enters a high-temperature high-pressure ball pressing system 5 without cooling, and is subjected to circulating hot pressing at 400-600 ℃; the high-temperature high-pressure ball pressing system 5 comprises a pre-pressing device and a high-pressure device, the linear pressure of the ball pressing machine is 80-110 kN/cm, a ball groove is almond-shaped or peach-core-shaped, and the capacity is 10-20 cm 3.
The electric furnace smelting system 8 is provided with a transformer above 4000kVA and an automatic electrode lifting device, the smelting temperature is above 3000 ℃, the electric furnace charging and electrode lifting operations are automatically controlled, and the position of a furnace mouth is integrally sealed.
The MgO content of the produced fused magnesia is more than or equal to 99 percent, and the volume density is more than or equal to 3.55g/cm 3.
The utility model discloses in, box batcher 2 is applicable to and carries the magnesium hydrate filter cake that water content is high, but automated control and regulation defeated material volume. The hammer type crushing dryer 3 is provided with a wear-resistant and high-temperature-resistant hammer head, and can simultaneously crush and dry the magnesium hydroxide filter cake.
The flue gas discharged by the electric furnace smelting system 8 completely enters the suspension roasting device 4 to be used as a main heat source, the suspension roasting device 4 is provided with a set of combustion system, the flue gas of the suspension roasting device 4 is discharged by a fan 9 and then is adjusted by matching of adjusting valves 10 arranged on a first flue gas conveying pipeline and a second flue gas conveying pipeline, one part of the flue gas enters the hammer type crushing dryer 3, and the other part of the flue gas is treated by a flue gas purification system 11 and then is discharged from a chimney 12.
The technical process of the system for producing the fused magnesia by taking the magnesium hydroxide as the raw material is as follows:
1) magnesium hydroxide filter cakes prepared from seawater or brine and stored in the filter cake storage bin 1 are fed and conveyed by a box-type feeder 2, and the feeding amount is adjustable;
2) feeding the magnesium hydroxide filter cake into a hammer type crushing dryer 3 for crushing and drying, wherein the drying temperature is 300-450 ℃, and mixing cold air into an adjusting valve 10 arranged on a cold air pipeline to adjust the temperature in the drying process to finally obtain magnesium hydroxide fine powder with the water content of less than or equal to 5%;
3) the fine magnesium hydroxide powder enters a suspension roasting device 4 along with drying air, the suspension roasting device 4 mainly utilizes the waste heat of flue gas of an electric furnace smelting system 8, and the roasting temperature is adjusted through a combustion system arranged on the suspension roasting device to ensure that the roasting temperature is 500-650 ℃;
4) the roasted magnesium oxide is collected and then directly sent into a closed high-temperature high-pressure ball pressing system 5 for cyclic hot pressing, after prepressing and high-pressure pressing, ball materials are sent into an electric furnace feeding bin 7 through a bucket elevator 6, and crushed materials return to the high-temperature high-pressure ball pressing system 5 to participate in pressing again. Fig. 1 shows a schematic of the circulating ball pressing mode, and the actual production process is not limited to this mode.
5) And feeding the ball material in the electric furnace feeding bin 7 into an electric furnace smelting system 8, and smelting, cooling and sorting to obtain an electric smelting magnesia product.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. A system for producing fused magnesia by taking magnesium hydroxide as a raw material is characterized by comprising a filter cake storage bin, a box-type feeder, a hammer type crushing dryer, a suspension roasting device, a high-temperature high-pressure ball pressing system, a bucket elevator, an electric furnace feeding bin and an electric furnace smelting system; the discharge gate of filter cake storehouse links to each other with the feed inlet of box batcher, the feed inlet of hammer crushing dryer is connected to the discharge gate of box batcher, the feed inlet of suspension roasting device is connected to the discharge gate of hammer crushing dryer, the feed inlet of high temperature high pressure ball pressing system is connected to the discharge gate of suspension roasting device, the material loading end of bucket elevator is connected to the discharge gate of high temperature high pressure ball pressing system, the feed inlet in electric stove feed storehouse is connected to the discharge end of bucket elevator, the feed inlet of electric stove system of smelting is connected to the discharge gate in electric stove feed storehouse.
2. The system for producing fused magnesia by using magnesium hydroxide as a raw material according to claim 1, wherein the suspension roasting device is provided with a flue gas outlet connected with a flue gas main pipe, the flue gas main pipe is connected with a drying air inlet of the hammer crusher dryer through a flue gas conveying pipeline I, the flue gas main pipe is connected with a flue gas inlet of a flue gas purification system through a flue gas conveying pipeline II, and a clean flue gas outlet of the flue gas purification system is connected with a chimney; the flue gas main pipe is provided with a fan, and the first flue gas conveying pipeline and the second flue gas conveying pipeline are respectively provided with an adjusting valve; and a cold air inlet is also formed in the first flue gas conveying pipeline and is connected with a cold air pipeline, and an adjusting valve is also arranged on the cold air pipeline.
3. The system for producing fused magnesia by using magnesium hydroxide as a raw material according to claim 1, wherein the electric furnace smelting system is provided with a flue gas outlet which is connected with a heat source inlet of the suspension roasting device through a flue gas pipeline.
4. The system for producing fused magnesia using magnesium hydroxide as a raw material according to claim 1, wherein the suspension roasting device has a totally enclosed structure, 3 to 6 cyclones are provided, and a preheating section and a roasting section are provided.
5. The system for producing fused magnesia using magnesium hydroxide as a raw material according to claim 1, wherein the suspension roasting apparatus is provided with a fuel system.
6. The system for producing fused magnesia using magnesium hydroxide as a raw material according to claim 1, wherein the high-temperature and high-pressure ball pressing system comprises a pre-pressing device and a high-pressure device, the linear pressure of the ball pressing machine is 80-110 kN/cm, the ball grooves are almond-shaped or peach-kernel-shaped, and the capacity is 10-20 cm3。
7. The system for producing fused magnesia by using magnesium hydroxide as a raw material according to claim 1, wherein the electric furnace smelting system is provided with a transformer above 4000kVA and an automatic electrode lifting device, and the position of a furnace opening is integrally closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921866882.4U CN211770329U (en) | 2019-11-01 | 2019-11-01 | System for use magnesium hydrate as raw materials production fused magnesia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921866882.4U CN211770329U (en) | 2019-11-01 | 2019-11-01 | System for use magnesium hydrate as raw materials production fused magnesia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211770329U true CN211770329U (en) | 2020-10-27 |
Family
ID=72962621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921866882.4U Active CN211770329U (en) | 2019-11-01 | 2019-11-01 | System for use magnesium hydrate as raw materials production fused magnesia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211770329U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110697741A (en) * | 2019-11-01 | 2020-01-17 | 中冶焦耐(大连)工程技术有限公司 | Process and system for producing fused magnesia by taking magnesium hydroxide as raw material |
-
2019
- 2019-11-01 CN CN201921866882.4U patent/CN211770329U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110697741A (en) * | 2019-11-01 | 2020-01-17 | 中冶焦耐(大连)工程技术有限公司 | Process and system for producing fused magnesia by taking magnesium hydroxide as raw material |
| CN110697741B (en) * | 2019-11-01 | 2023-11-28 | 中冶焦耐(大连)工程技术有限公司 | Process and system for producing fused magnesia by taking magnesium hydroxide as raw material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105540627A (en) | Preparation method for clinker of alumina produced by sintering process | |
| CN101570406A (en) | Calcination process of active lime | |
| CN108863114A (en) | A kind of method that the light-burned process waste heat of magnesite recycles | |
| CN102180604B (en) | Spinning bed equipment and process for producing high-activity lime with spinning bed | |
| CN103755171A (en) | Coal gangue activation process adopting synergism of pre-decomposition kiln | |
| CN101811839A (en) | Method for producing cement clinker by calcining chalk | |
| CN102372297B (en) | Method for sintering dry feed in process of alumina production by series process | |
| CN212669567U (en) | Powder lime calcining and reforming system based on novel dry-process cement clinker calcining system | |
| CN111977995A (en) | Powder lime calcining and reforming system based on novel dry-process cement clinker calcining system | |
| CN109970087A (en) | A kind of device and method using the dry red mud sintered alumina clinker of Bayer process | |
| CN103342371A (en) | Process and device for whitening calcined black talc | |
| CN102030487A (en) | New process for preparing high-purity magnesium oxide by normal temperature carbonization and low temperature pyrolysis | |
| CN102992661A (en) | Beam type heat storage lime kiln | |
| CN211770329U (en) | System for use magnesium hydrate as raw materials production fused magnesia | |
| CN108585555B (en) | Industrial powder clinker homogeneous calcination preparation equipment and preparation method | |
| CN113028827A (en) | Operation method of spodumene calcination conversion device | |
| CN110220386A (en) | A kind of kaolin powder pre-heating system and kaolin powder calcination system and method for calcinating comprising it | |
| CN105347702A (en) | Cement production rotary kiln device | |
| CN111302673B (en) | High-temperature magnesium oxide calcining device and calcining method thereof | |
| CN207973684U (en) | A kind of preparation facilities producing aluminium oxide lime | |
| CN211111740U (en) | Double-chamber lime kiln | |
| CN109052997B (en) | Method for preparing high-activity light-burned magnesium oxide by using fixed bed-fluidized bed in multi-flow state | |
| CN112010332A (en) | Aluminum oxide clinker preparation system and process flow thereof | |
| CN110697741B (en) | Process and system for producing fused magnesia by taking magnesium hydroxide as raw material | |
| CN211419595U (en) | System for use magnesium hydrate as raw materials production sintering magnesite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |