CN114455955A - Preparation method of high-efficiency energy-saving floating bead brick for top-loading coke oven - Google Patents

Preparation method of high-efficiency energy-saving floating bead brick for top-loading coke oven Download PDF

Info

Publication number
CN114455955A
CN114455955A CN202111670335.0A CN202111670335A CN114455955A CN 114455955 A CN114455955 A CN 114455955A CN 202111670335 A CN202111670335 A CN 202111670335A CN 114455955 A CN114455955 A CN 114455955A
Authority
CN
China
Prior art keywords
parts
floating bead
coke oven
brick
efficiency energy
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.)
Pending
Application number
CN202111670335.0A
Other languages
Chinese (zh)
Inventor
孙伟
裘荣霞
丁娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Weinai Energy Saving Material Co ltd
Original Assignee
Shandong Weinai Energy Saving Material Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong Weinai Energy Saving Material Co ltd filed Critical Shandong Weinai Energy Saving Material Co ltd
Priority to CN202111670335.0A priority Critical patent/CN114455955A/en
Publication of CN114455955A publication Critical patent/CN114455955A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/04Clay; Kaolin
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/13Compounding ingredients
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/13Compounding ingredients
    • C04B33/1305Organic additives
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/13Compounding ingredients
    • C04B33/131Inorganic additives
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/13Compounding ingredients
    • C04B33/132Waste materials; Refuse; Residues
    • C04B33/135Combustion residues, e.g. fly ash, incineration waste
    • C04B33/1352Fuel ashes, e.g. fly ash
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/13Compounding ingredients
    • C04B33/132Waste materials; Refuse; Residues
    • C04B33/138Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063Preparing or treating the raw materials individually or as batches
    • C04B38/0635Compounding ingredients
    • C04B38/0645Burnable, meltable, sublimable materials
    • C04B38/067Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063Preparing or treating the raw materials individually or as batches
    • C04B38/0635Compounding ingredients
    • C04B38/0645Burnable, meltable, sublimable materials
    • C04B38/0675Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607Thermal properties, e.g. thermal expansion coefficient
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/60Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

Abstract

The invention relates to the technical field of floating bead bricks, in particular to a preparation method of an efficient energy-saving floating bead brick for a top-charging coke oven, which improves the heat preservation efficiency, increases the burning resistance and improves the compression strength of the floating bead brick; the method comprises the following steps: firstly, selecting 300-400 parts of fly ash, 375-610 parts of clay, 46-70 parts of alumina powder, 65-83 parts of waste iron powder and 50-63 parts of cement according to parts by weight; refining and grinding the material obtained in the step I through a star-type ball mill; thirdly, adding 1250-1600 floating beads, 255-325 steel slag, 375-670 clay, an adhesive and a pore-forming agent into the grinding material obtained in the second step; fourthly, adding the material obtained in the third step into a stirrer for uniform stirring; adding 160-185 parts by weight of water into the mixed materials; sixthly, pressing the mud obtained after mixing in the fifth step into a blank; seventhly, cutting the blank according to the specification of the brick body; eighthly, airing and drying the cut blank; and ninthly, pouring the dried green bricks into a kiln for firing.

Description

Preparation method of high-efficiency energy-saving floating bead brick for top-loading coke oven
Technical Field
The invention relates to the technical field of floating bead bricks, in particular to a preparation method of an efficient energy-saving floating bead brick for a top-loading coke oven.
Background
As is well known, floating bead brick (floating refractory brick) is a heat-insulating refractory product made of floating beads as a main raw material. The clay heat-insulating refractory brick is produced by floating beads in China in the early 70 s of the 20 th century. As the process is simple, the resources are rich, the product quality is better, and the floating bead brick is produced by adopting a porous clinker method or a floating bead burning additive method for more than 80 years. The floating bead is an aluminium silicate glass hollow bead body floated from fly ash of a thermal power plant. It is light, thin, hollow, smooth in surface, high temperature resistant and good in heat insulating performance. By utilizing the characteristics of the floating beads, the heat-insulating refractory material with excellent heat-insulating performance is manufactured.
At present, a coke oven is a furnace generally built by refractory bricks and refractory blocks, is used for carbonizing coal to produce coke, and a furnace for refining coke by using coal is a main thermal equipment for coking. The modern coke oven is a horizontal chamber type coke oven which mainly aims at producing metallurgical coke and can recover coking chemical products, and comprises an oven body and accessory equipment. The coke oven body consists of a furnace top, a combustion chamber, a carbonization chamber, a chute area, a regenerator and the like, and is connected with a chimney through a flue. The coke oven bottom is built on a concrete foundation, the whole coke oven is built above the coke oven bottom, the basic structure of the modern coke oven is basically the same, but the coke oven can be divided into a plurality of types because the coal charging mode, the heat supply mode and the used fuel are different, and the coke oven body is supported by the coke oven bottom with stronger compressive strength no matter what type of coke oven.
However, in the prior art, refractory bricks are often built for making the bottom of the coke oven have good sealing performance and preventing heat loss, and are all floating bead bricks containing floating beads, so that a heat-insulating refractory material with excellent heat-insulating performance can be manufactured, the temperature inside the coke oven can be well maintained, and the temperature loss inside the coke oven can be avoided.
Disclosure of Invention
In order to solve the technical problems, the invention provides the preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven, which improves the heat preservation efficiency, the burning resistance and the compression strength of the floating bead brick.
The invention discloses a preparation method of an efficient energy-saving floating bead brick for a top-loading coke oven, which comprises the following steps:
firstly, selecting 300-400 parts of fly ash, 375-610 parts of clay, 46-70 parts of alumina powder, 65-83 parts of waste iron powder and 50-63 parts of cement according to parts by weight;
refining and grinding the material obtained in the step one by a star-type ball mill;
thirdly, adding 1250-1600 floating beads, 255-325 steel slag, 375-670 clay, an adhesive and a pore-forming agent into the grinding material obtained in the second step;
fourthly, adding the material obtained in the third step into a stirrer for uniform stirring;
adding 160-185 parts by weight of water into the mixed materials, and stirring again to obtain the required pug;
sixthly, pressing the mud obtained after mixing in the fifth step into a blank;
seventhly, cutting the blank according to the specification of the brick body;
eighthly, airing and drying the cut blank;
and ninthly, pouring the dried green bricks into a kiln for firing.
The preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven comprises the steps of sorting the fired and formed floating bead bricks, and screening and eliminating unqualified floating bead bricks.
According to the preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven, the pore-forming agent is wood chips or polystyrene balls.
The invention relates to a preparation method of an efficient energy-saving floating bead brick for a top-loading coke oven, wherein the adhesive is lignin, magnesium oxide, methyl cellulose and aluminum dihydrogen phosphate.
According to the preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven, the fly ash is obtained by checking the fly ash of a thermal power plant.
The preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven has the firing temperature of 1350-1700 ℃.
According to the preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven, the chemical components of the floating beads mainly comprise silicon dioxide and aluminum oxide, and the particle size is about 0.1 mm.
The invention relates to a preparation method of an efficient energy-saving floating bead brick for a top-loading coke oven, wherein cement is Portland cement.
Compared with the prior art, the invention has the beneficial effects that: the heat preservation efficiency is improved, the burning resistance strength is increased, and the compression strength of the floating bead brick is improved.
Drawings
FIG. 1 is a schematic flow chart of a preparation method of the floating bead brick of the invention;
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in figure 1, the preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven comprises the following steps:
firstly, selecting 300-400 parts of fly ash, 375-610 parts of clay, 46-70 parts of alumina powder, 65-83 parts of waste iron powder and 50-63 parts of cement according to parts by weight;
refining and grinding the material obtained in the step one by a star-type ball mill;
thirdly, adding 1250-1600 floating beads, 255-325 steel slag, 375-670 clay, an adhesive and a pore-forming agent into the grinding material obtained in the second step;
fourthly, adding the material obtained in the third step into a stirrer for uniform stirring;
adding 160-185 parts by weight of water into the mixed materials, and stirring again to obtain the required pug;
sixthly, pressing the mud obtained after mixing in the fifth step into a blank;
seventhly, cutting the blank according to the specification of the brick body;
eighthly, airing and drying the cut blank;
ninthly, pouring the aired green bricks into a kiln for firing; the heat preservation efficiency is improved, the burning resistance strength is increased, and the compression strength of the floating bead brick is improved.
The preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven comprises the steps of sorting the fired and formed floating bead bricks, and screening and eliminating unqualified floating bead bricks.
According to the preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven, the pore-forming agent is wood chips or polystyrene balls.
The invention relates to a preparation method of an efficient energy-saving floating bead brick for a top-loading coke oven, wherein the adhesive is lignin, magnesium oxide, methyl cellulose and aluminum dihydrogen phosphate.
According to the preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven, the fly ash is obtained by checking the fly ash of a thermal power plant.
The preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven has the firing temperature of 1350-1700 ℃.
According to the preparation method of the high-efficiency energy-saving floating bead brick for the top-loading coke oven, the chemical components of the floating beads mainly comprise silicon dioxide and aluminum oxide, and the particle size is about 0.1 mm.
The invention relates to a preparation method of an efficient energy-saving floating bead brick for a top-loading coke oven, wherein cement is Portland cement.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The preparation method of the high-efficiency energy-saving floating bead brick for the top-charging coke oven is characterized by comprising the following steps:
firstly, selecting 300-400 parts of fly ash, 375-610 parts of clay, 46-70 parts of alumina powder, 65-83 parts of waste iron powder and 50-63 parts of cement according to parts by weight;
refining and grinding the material obtained in the step one by a star-type ball mill;
thirdly, adding 1250-1600 floating beads, 255-325 steel slag, 375-670 clay, an adhesive and a pore-forming agent into the grinding material obtained in the second step;
fourthly, adding the material obtained in the third step into a stirrer for uniform stirring;
adding 160-185 parts by weight of water into the mixed materials, and stirring again to obtain the required pug;
sixthly, pressing the mud obtained after mixing in the fifth step into a blank;
seventhly, cutting the blank according to the specification of the brick body;
eighthly, airing and drying the cut blank;
and ninthly, pouring the dried green bricks into a kiln for firing.
2. The method for preparing the high-efficiency energy-saving floating bead brick for the top-loading coke oven as claimed in claim 1, which is characterized by comprising the steps of sorting the fired and formed floating bead bricks and screening and eliminating unqualified floating bead bricks.
3. The method for preparing the high-efficiency energy-saving floating bead brick for the top-loading coke oven as claimed in claim 1, wherein the pore-forming agent is wood chips or polystyrene spheres.
4. The method for preparing the high-efficiency energy-saving floating bead brick for the top-loading coke oven according to claim 1, wherein the adhesive is lignin, magnesium oxide, methyl cellulose and aluminum dihydrogen phosphate.
5. The method for preparing the high-efficiency energy-saving floating bead brick for the top-loading coke oven according to claim 1, wherein the fly ash is obtained by checking the fly ash of a thermal power plant.
6. The method for preparing the high-efficiency energy-saving floating bead brick for the top-loading coke oven according to claim 1, wherein the firing temperature is 1350-1700 ℃.
7. The method for preparing the high-efficiency energy-saving floating bead brick for the top-loading coke oven according to claim 1, wherein the chemical components of the floating beads mainly comprise silicon dioxide and aluminum oxide, and the particle size is about 0.1 mm.
8. The method for preparing the high-efficiency energy-saving floating bead brick for the top-loading coke oven according to claim 1, wherein the cement is portland cement.
CN202111670335.0A 2021-12-30 2021-12-30 Preparation method of high-efficiency energy-saving floating bead brick for top-loading coke oven Pending CN114455955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111670335.0A CN114455955A (en) 2021-12-30 2021-12-30 Preparation method of high-efficiency energy-saving floating bead brick for top-loading coke oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111670335.0A CN114455955A (en) 2021-12-30 2021-12-30 Preparation method of high-efficiency energy-saving floating bead brick for top-loading coke oven

Publications (1)

Publication Number Publication Date
CN114455955A true CN114455955A (en) 2022-05-10

Family

ID=81408557

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111670335.0A Pending CN114455955A (en) 2021-12-30 2021-12-30 Preparation method of high-efficiency energy-saving floating bead brick for top-loading coke oven

Country Status (1)

Country Link
CN (1) CN114455955A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110698221A (en) * 2019-08-28 2020-01-17 山东潍耐节能材料有限公司 Preparation method of special floating bead brick for building ultra-strength coke oven bottom
CN112745131A (en) * 2020-12-31 2021-05-04 山东潍耐节能材料有限公司 Furnace door glaze-hanging large building block for large-volume coke furnace and production process thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110698221A (en) * 2019-08-28 2020-01-17 山东潍耐节能材料有限公司 Preparation method of special floating bead brick for building ultra-strength coke oven bottom
CN112745131A (en) * 2020-12-31 2021-05-04 山东潍耐节能材料有限公司 Furnace door glaze-hanging large building block for large-volume coke furnace and production process thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
李红霞: "《现代冶金功能耐火材料》", 28 February 2019, 冶金工业出版社, pages: 740 *
王福元等: "《粉煤灰利用手册》", 31 July 1997, 中国电力出版社, pages: 472 *

Similar Documents

Publication Publication Date Title
CN109516775B (en) Coal chemical industry gasification slag sintered brick and preparation method thereof
CN112645688A (en) Production process of high-performance coal gangue ceramsite
CN107935419B (en) Modified steel slag cement
CN100393656C (en) High-intensity corrosion-proof chimney lining brick made by mullite and method for manufacturing the same
CN104119081B (en) Coke oven high thermal conductive silicon brick
CN109574639A (en) High thermal shock resistance corundum-mullite brick and preparation method thereof
CN106242593A (en) Low creep andalusite composite refractory brick and its preparation method and application
CN1062532C (en) Light heat insulation refractory brick made of powdered coal ash
CN108409169A (en) A kind of fast energy-saving preparation method of quick lime
CN110698221A (en) Preparation method of special floating bead brick for building ultra-strength coke oven bottom
CN104129972B (en) Process for producing sintered brick by using ultrahigh-content fly ash
CN108373274A (en) A kind of fast energy-saving preparation method of lime
CN110937906B (en) Safe and energy-saving smelting furnace body and smelting device adopting same
CN114455955A (en) Preparation method of high-efficiency energy-saving floating bead brick for top-loading coke oven
CN109369203A (en) Density mullite brick and preparation method thereof in high intensity
CN107540356A (en) A kind of carbon baking furnace flame path wall novel energy-conserving prefabricated component and preparation method thereof
CN101913891B (en) Refractory bricks for flue walls of carbon anode baking furnaces and preparation method thereof
CN100534946C (en) Method for producing shale clinker brick by using Kunming Dabanqiao fir-pine park high-calcium shale
CN1266827A (en) Immersed-in-wax burnt conite brick and its making process
CN112898002A (en) Heat-resistant porcelain fired by spodumene raw material and production process thereof
CN112707740A (en) Siliceous heat-insulating brick for coke oven and production process thereof
CN101830714A (en) Alumina-silicon nitride iron compound abrasive brick for large-size cement kiln and manufacture method thereof
CN1048967C (en) Burnt oil-immersed conite and its manufacturing process
CN111499398A (en) Method for preparing refractory brick from refractory clay clinker
CN109320104A (en) A kind of energy-efficient production technology and its production method of quick lime

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination