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CN112250344A - Method for preparing artificial white marble building material by utilizing refined manganese slag - Google Patents

Method for preparing artificial white marble building material by utilizing refined manganese slag Download PDF

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Publication number
CN112250344A
CN112250344A CN202011208968.5A CN202011208968A CN112250344A CN 112250344 A CN112250344 A CN 112250344A CN 202011208968 A CN202011208968 A CN 202011208968A CN 112250344 A CN112250344 A CN 112250344A
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Prior art keywords
powder
white marble
manganese slag
preparing
artificial white
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CN202011208968.5A
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Chinese (zh)
Inventor
张万兵
宁结算
张立庆
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Anyang Jinfang Metallurgy Co ltd
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Anyang Jinfang Metallurgy Co ltd
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Priority to CN202011208968.5A priority Critical patent/CN112250344A/en
Publication of CN112250344A publication Critical patent/CN112250344A/en
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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
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/14—Polyepoxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/242—Moulding mineral aggregates bonded with resin, e.g. resin concrete
    • B29C67/243—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/80—Optical properties, e.g. transparency or reflexibility
    • C04B2111/82—Coloured materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

A method for preparing an artificial white marble building material by utilizing refined manganese slag, belonging to the field of building materials. The artificial white marble comprises, by weight, 10-15% of refined slag powder, 40-45% of dolomite powder, 15-25% of quartz sand powder, 10-20% of stone powder, 5-15% of adhesive, 1-2% of curing agent, 0.03-0.07% of toner and 0.01-0.03% of compacting agent, and is formed into an artificial white marble product after being molded and cured by a mold.

Description

Method for preparing artificial white marble building material by utilizing refined manganese slag
Technical Field
The invention relates to a method for preparing an artificial white marble building material, in particular to a method for preparing the artificial white marble building material by utilizing refined manganese slag, belonging to the field of building materials.
Background
The white marble is a rare building material, is white and flawless, has solid and fine texture, is very easy to carve, and most of rare buildings from ancient times to modern times adopt the white marble as a raw material. In the west, white marble is used as a portrait carving material from ancient Hizuki times, and the portrait looks like jade; from the Han Dynasty, China uses the material of 'Hua Ruan Mei Yu' to construct royal palace for building, decorate temple, carve Buddha statue, decorate hall room. Such as: the base of the palace in the uterus, stone steps, guardrails and the like of the ornamental watch are mostly made of white marble which is white and clean in the whole body, and the ornamental watch is also used for carving Buddha statues and the like. Because the white marble is a pure white and flawless beautiful marble, is a rare natural stone, has few sources and belongs to scarce materials, the white marble is expensive and cannot be used in common buildings.
Because of the scarcity of the natural white marble stone, the artificial white marble replacing the natural white marble is used for common buildings, so that the noble and gorgeous properties of the buildings and the like can be reflected, and the manufacturing cost can be reduced, therefore, the artificial white marble is a white marble replacing product with high added value, and a plurality of manufacturers produce the artificial white marble, but the sources of the artificial white marble are mostly made of raw materials with considerable price.
Although the natural white marble is white like snow, the natural white marble is easy to carve, but the hardness of the natural white marble is relatively soft, and the corrosion resistance of the natural white marble is poorer than that of stone materials such as granite and the like.
The medium and low carbon ferromanganese is a key basic material for metallurgy, aerospace, chemical industry and other departments, a large amount of refined manganese slag can be generated while the medium and low carbon ferromanganese industry develops, the medium and low carbon ferromanganese is mainly used in cement production at present, however, the refined manganese slag added in the cement production is limited, the additional value is low, the large and small materials are used, the refined manganese slag can bring serious environmental pollution in long-term stacking, the continuous development of the medium and low carbon ferromanganese can be influenced after the refined manganese slag is processed in time, certain pressure is brought to local environmental protection, how to consume the refined manganese slag generated in the medium and low carbon ferromanganese manufacturing process can be timely consumed, the medium and low carbon ferromanganese manufacturing factory is a large subject in the production process, how to manufacture products with high additional value by utilizing the refined manganese slag, and the field technician is a inexhaustible object.
Disclosure of Invention
The invention provides a method for preparing an artificial white marble building material by utilizing refined manganese slag, aiming at solving the problems that the natural white marble has soft material and poor corrosion resistance compared with granite and the like, and the accumulation of the manganese slag in a medium-long period can cause environmental pollution.
The technical scheme of the invention is as follows: a method for preparing an artificial white marble building material by utilizing refined manganese slag comprises the following steps of:
a. preparing a filler: firstly, grinding the refined manganese slag into 80-120 meshes, grinding dolomite particles into 6-20 meshes, grinding quartz sand into 100-300 meshes, and grinding stone powder into 200-400 meshes;
b. preparing materials: pouring the refined manganese slag powder, dolomite powder, quartz sand powder, stone powder and toner, together with an adhesive, a curing agent and a compacting agent into a mixer according to the formula proportion, stirring uniformly to form a pasty mixture;
c. molding: pouring the pasty mixture in the step b into a mould, and molding by adopting pressure or vibration;
d. and (3) curing: solidifying the artificial white marble formed by pressure or vibration, demoulding after solidification to obtain the artificial white marble product,
further, the refined manganese slag comprises the following chemical components in percentage by weight: SiO 22 35-55%、CaO 25-45%、Al2O32-15%、MgO 2-5%、 MnO 2-10%、Fe2O3 0.5-1.5%；
Further, in the step b, the raw materials comprise 10-15% of refined slag powder, 40-45% of dolomite powder, 15-25% of quartz sand powder, 10-20% of stone powder, 5-15% of adhesive, 1-2% of curing agent, 0.03-0.07% of toner and 0.01-0.03% of compacting agent;
further, in the step b, the used adhesive is epoxy resin, the used curing agent is diethyl butanone dicarboxylate, and the used compacting agent is ferric hydroxide;
further, the toner used in the step c is titanium dioxide;
further, in the step c, during the forming, the pressure used for pressure forming is 1000 KN-2500 KN, and the frequency used for vibration forming is 2000 times/min-4000 times/min;
furthermore, in the step d, the curing temperature is controlled to be 0-120 ℃, and the curing time is controlled to be 5-20 hours.
The invention has the following positive effects: in the invention, refined slag powder, dolomite powder, quartz sand powder, stone powder and the like can be uniformly mixed and bonded together by stirring through using an adhesive, then the hardness of the powder is improved on the basis of recycling vibration by utilizing a curing agent, the density of the powder can be further improved by adding a compacting agent, and particularly, the color of the formed artificial building material can present the color like white jade by adding a titanium white powder white toner.
Detailed Description
The technical scheme of the invention is as follows: a method for preparing an artificial white marble building material by utilizing refined manganese slag comprises the following steps of:
a. preparing a filler: firstly, grinding the refined manganese slag into 80-120 meshes, grinding dolomite particles into 6-20 meshes, grinding quartz sand into 100-300 meshes, and grinding stone powder into 200-400 meshes;
in this embodiment, the refined manganese slag is crushed by using an existing crusher, filtered by using a 100-mesh sieve, and fed into a refined manganese slag powder bin, similarly, 20-mesh dolomite powder, 250-mesh quartz sand powder, 300-mesh limestone powder and 100-mesh titanium dioxide which are purchased from the market are weighed respectively and fed into the bin, and meanwhile, the epoxy resin serving as an adhesive, diethyl butanone dicarboxylate serving as a curing agent and ferric hydroxide serving as a compacting agent are weighed;
b. pouring the refined manganese slag powder, dolomite powder, quartz sand powder, stone powder and toner, together with an adhesive, a curing agent and a compacting agent into a mixer according to the formula proportion, stirring uniformly to form a pasty mixture;
in the embodiment, a conveyer belt is used for feeding a bin for refining manganese slag powder, dolomite powder and quartz sand powder into a mixer for premixing, and then weighed epoxy resin serving as an adhesive, diethyl butanone diacid serving as a curing agent and ferric hydroxide serving as a compacting agent are added;
c. molding: pouring the pasty mixture in the step b into a mold, and molding by pressure or vibration, wherein in the embodiment, the mold is a cubic mold with one surface of a brick body structure in a dragon shape and the size of 800mm × 80000mm × 30mm, and because of large area and thin thickness, a reinforcing mesh is arranged inside the mold, so that the strength is improved, and the fracture phenomenon in the transportation process is prevented;
d. and (3) curing: solidifying the artificial white marble formed by pressure or vibration, and demoulding after solidification to obtain an artificial white marble product;
the refined manganese slag used at this time comprises the following chemical components in percentage by weight: SiO 22 35-55%，CaO 25-45%，Al2O32-15%，MgO 2-5%， MnO 2-10% ，Fe2O3 0.5-1.5%；
The various components in the refined manganese slag have the following functions:
SiO2：silica has both crystalline and amorphous forms. Silica such as quartz, quartz sand, etc. existing in nature are collectively called silica. Pure quartz is colorless crystal, large and transparent prismatic quartz crystal is called crystal, purple crystal containing trace impurities and light yellow, golden yellow and brown are called nicotiana crystal. Chalcedony, agate and jasper are colored quartz crystals containing impurities. Sand is fine particles of quartz mixed with impurities. The opal and diatomite are amorphous silica. The silicon dioxide has wide application range and is mainly used for manufacturing glass, water glass, pottery, enamel, refractory materials and aerogel feltSilicon iron, molding sand, simple substance silicon, cement and the like, and in ancient times, silicon dioxide is also used for manufacturing glaze and a matrix of porcelain. General stones are mainly composed of silicon dioxide and calcium carbonate;
CaO: calcium oxide is a basic oxide and is sensitive to moisture. Carbon dioxide and moisture are easily absorbed from the air. Reacting with water to form calcium hydroxide (Ca (OH)2) And generates a large amount of heat, which is corrosive. As fillers, for example: as a filler for epoxy adhesives; can be used as building materials, metallurgical fluxing agents, cement accelerators and fluxing agents of fluorescent powder; can also be used for refractory materials and drying agents;
Al2O3: is a high-hardness compound, has a melting point of 2054 ℃ and a boiling point of 2980 ℃, can be used for preparing an ionizable ion crystal at a high temperature, and is commonly used for manufacturing refractory materials. Have different crystal forms, and are commonly alpha-Al 2O3 and gamma-Al 2O 3. The industrial products are colorless or slightly pink cylindrical particles, and have good pressure resistance, and are common adsorbents, catalysts and catalyst carriers in petroleum refining and petrochemical industry; the presence of Al2O3 retards the decomposition of silica, in addition to increasing the tendency of silica to form liquids at high temperatures;
MnO: manganese oxide is a main fire-retardant component in building materials, and manganese oxide wallboard, as a building material, has several excellent characteristics of fire prevention, termite prevention, moisture prevention, mold prevention and high strength, and is also used as a pigment, glass and the like. Can be used for manufacturing lithium manganese oxide batteries or other batteries. Used as feed additive, trace element fertilizer, ferrite raw material, paint, varnish drying agent, etc.;
MgO: also called magnesite, is a white hygroscopic solid mineral which exists in nature in the form of periclase and is a raw material for smelting magnesium (or oxides). It has empirical formula of magnesium oxide, and is formed from Mg + ion and O2-The ions are combined together by ion bonds to form a crystal lattice, and magnesium hydroxide (MgO + H) is formed in the presence of water2O → Mg(OH)2) However, magnesium hydroxide may in turn form magnesium oxide by heating to separate the water. Magnesium oxide is considered a refractory material, i.e. physically and chemically stable at high temperatures.It has two useful properties, high thermal conductivity and low electrical conductivity. To date, the refractory industry consumed most of the world's magnesium oxide, 2004, approximately 56% of the united states magnesium oxide, the remaining 44% for agricultural, chemical, construction, environmental and other industrial applications, magnesium oxide being used as the basic refractory for crucibles;
Fe2O3: iron oxide is widely used as a pigment in high-grade automobile coatings, building coatings, anticorrosive coatings and powder coatings, is a better environment-friendly coating, and is iron oxide: has the advantages of good heat resistance, weather resistance, ultraviolet absorption and the like, can be well dispersed in an oily carrier, and the coating or the ink prepared by the coating or the ink has satisfactory transparency. Coating material made of iron oxide having semiconductor characteristics
In the step b, the raw materials in the step b are 10-15% of refined slag powder, 40-45% of dolomite powder, 15-25% of quartz sand powder, 10-20% of stone powder, 5-15% of adhesive, 1-2% of curing agent, 0.03-0.07% of toner and 0.01-0.03% of compacting agent, and the functions of the raw materials are as follows:
refining manganese slag powder: the composition contains multiple components, and the functions of the components are as described above;
dolomite: dolomite is a carbonate mineral, including iron dolomite and manganese dolomite, respectively. Its crystal structure is calcite, often rhombohedral. The foam will slowly bubble out when the dilute hydrochloric acid is cooled. Some dolomite emits orange-red light under the irradiation of cathode rays. Dolomite is the main mineral constituent that makes up dolomitic and dolomitic limestone. The dolomite can be used in the fields of building materials, ceramics, glass, refractory materials, chemical industry, agriculture, environmental protection, energy conservation and the like. Mainly used as alkaline refractory materials and fluxes for blast furnace ironmaking; and ingredients for producing glass and ceramics;
quartz sand: the quartz sand is quartz particles formed by crushing and processing quartz stones. Quartz is a non-metallic mineral, a silicate mineral that is hard, wear resistant, and chemically stable. The color of the quartz sand is milk white or colorless translucent, the Mohs hardness is 7, the quartz sand is an important industrial mineral raw material and a non-chemical dangerous product, and the quartz sand is widely used in the industries of glass, casting, ceramics and fireproof materials, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemical engineering, plastics, rubber, grinding materials, filter materials and the like. The quartz sand is a colorless and transparent quartz variety, the quartz sandstone is consolidated clastic rock, the content of quartz clastic reaches more than 95 percent, the quartz clastic is from various magma rocks, sedimentary rocks and metamorphic rocks, the heavy minerals are less, and the associated minerals are feldspar, mica and clay minerals. The quartzite is divided into two causes of sedimentation and deterioration, wherein the former causes are not obvious in boundary of detritus particles and cement, and the latter causes are quartzite ores with deep deterioration degree and pure quality. Vein quartz is formed by hydrothermal action, and is almost entirely composed of quartz, with a dense block structure. The mineral content in the quartz sand is greatly changed, quartz is taken as the main material, and feldspar, mica, rock debris, heavy minerals, clay minerals and the like are taken as the secondary materials;
stone powder: stone dust is a general term for stone powder, which is widely used and the products made therefrom are ubiquitous in our lives, for example: plastics, calcium tablets, cosmetics, clothes, toothpaste, etc., ultrafine stone powder: the method is widely applied to the production and application fields of rubber, paper making, paint, plastic-aluminum profiles, ceramics, cement, glass, smelting, refractory materials, medicines, food, daily chemical industry, cosmetics, technical buildings, high-grade decoration and fitment and the like. Especially when the titanium pigment is applied to paint and papermaking, the use amount of the titanium pigment can be directly reduced by 3% -10%, so that the product cost is greatly reduced. The paper making industry of the superfine fine stone powder of the special grade of white marble of high quality is used for adding paper pulp (offset paper, copper plate paper and the like), and the function of the paper making industry is to increase opacity and improve flexibility of paper.
In the step b, the adhesive is epoxy resin, the curing agent is diethyl butanone dicarboxylate, and the compacting agent is ferric hydroxide;
diethyl butanone dicarboxylate: mainly used as a plasticizer and a special lubricant, and also used as a gas chromatography stationary liquid; used as solvent, food flavoring agent, and organic synthesis intermediate; the invention is mainly used for the rapid curing and molding of the artificial white marble.
Iron hydroxide: the invention is mainly used for preparing pigment and medicine, and is also used as a water purifying agent, a catalyst, an absorbent, an arsenic antidote and the like.
The toner used in the step c is titanium dioxide, and the adding weight of the toner is 0.03-0.07% of the weight of the powdery mixture; (ii) a
Titanium dioxide (TiO 2): is an important inorganic chemical pigment, and especially has important application in the industries of coating, printing ink, papermaking, plastic rubber, chemical fiber, ceramic and the like under the condition of modified coating. In the invention, the artificial white marble is mainly used for coloring, and the white color of the artificial white marble is increased;
in the step c, during forming, the pressure used for pressure forming is 1000 KN-2500 KN, and the frequency used for vibration forming is 2000 times/min-4000 times/min; in the embodiment, the vibrator used in the building field is utilized to vibrate in the mixture, and the gap gas in the mixture is removed, so that the compacting effect is achieved.
In the step d, the curing temperature is controlled to be 0-120 ℃, the curing time is controlled to be 5-20 hours, in the embodiment, the batch processed products are placed on a heating conveyor belt, and are heated according to a low-high-low heating process, and the maximum temperature reaches 80 ℃.
Although the square wall brick structure is formed in the present embodiment, mountain grass trees, insect fishes, birds and beasts, and various objects in nature or the like can be formed as required: the animal and bird in kylin, dragon, etc. may be also formed into various cubic blanks and carved mechanically.
Example (b):
the following is a summary of experimental data using the recipes of the invention
Figure 273933DEST_PATH_IMAGE001
Some data was initially obtained in experiments that were not satisfactory, but in this example, not listed, the above good results were finally achieved by adjusting the data several times.
From the above data, it can be seen that the data of the above examples all meet the test requirements through tests.
In the invention, refined manganese slag powder, dolomite powder, quartz sand powder, stone powder and the like can be uniformly mixed and bonded together by stirring through using an adhesive, then the hardness of the powder is improved on the basis of utilizing the curing agent and vibration, the density of the powder can be further improved by adding a compacting agent, and particularly, the color of the formed artificial building material can present the color like white jade by adding a titanium dioxide white toner.

Claims (7)

1. A method for preparing an artificial white marble building material by utilizing refined manganese slag is characterized by comprising the following steps: the artificial white marble comprises refined manganese slag powder, dolomite powder, quartz sand powder, stone powder, an adhesive, a curing agent, a toner and a compacting agent, and the preparation method of the artificial white marble building material is operated according to the following steps:
a. preparing a filler: firstly, grinding the refined manganese slag into 80-120 meshes, grinding dolomite particles into 6-20 meshes, grinding quartz sand into 100-300 meshes, and grinding stone powder into 200-400 meshes;
b. preparing materials: pouring the refined manganese slag powder, dolomite powder, quartz sand powder, stone powder and toner, together with an adhesive, a curing agent and a compacting agent into a mixer according to the formula proportion, stirring uniformly to form a pasty mixture;
c. molding: pouring the pasty mixture in the step b into a mould, and molding by adopting pressure or vibration;
d. and (3) curing: solidifying the artificial white marble formed by pressure or vibration, and demoulding after solidification to obtain the artificial white marble product.
2. The manganese slag obtained by refining according to claim 1The method for preparing the artificial white marble building material is characterized by comprising the following steps of: the refined manganese slag comprises the following chemical components in percentage by weight: SiO 22 35-55%、CaO 25-45%、Al2O3 2-15%、MgO 2-5%、 MnO 2-10%、Fe2O3 0.5-1.5%。
3. The method for preparing the artificial white marble building material by using the refined manganese slag as claimed in claim 1, wherein the method comprises the following steps: in the step b, the raw materials comprise 10-15% of refined slag powder, 40-45% of dolomite powder, 15-25% of quartz sand powder, 10-20% of stone powder, 5-15% of adhesive, 1-2% of curing agent, 0.03-0.07% of toner and 0.01-0.03% of compacting agent.
4. The method for preparing the artificial white marble building material by using the refined manganese slag as claimed in claim 1, wherein the method comprises the following steps: in the step b, the used adhesive is epoxy resin, the used curing agent is diethyl butanone diacid, and the used compacting agent is ferric hydroxide.
5. The method for preparing the artificial white marble building material by using the refined manganese slag as claimed in claim 1, wherein the method comprises the following steps: and c, using titanium dioxide as the toner in the step c.
6. The method for preparing the artificial white marble building material by using the refined manganese slag as claimed in claim 1, wherein the method comprises the following steps: in the step c, during forming, the pressure used for pressure forming is 1000 KN-2500 KN, and the frequency used for vibration forming is 2000 times/min-4000 times/min.
7. The method for preparing the artificial white marble building material by using the refined manganese slag according to claim 1, which is characterized in that: in the step d, the curing temperature is controlled to be 0-120 ℃, and the curing time is controlled to be 5-20 hours.
CN202011208968.5A 2020-11-03 2020-11-03 Method for preparing artificial white marble building material by utilizing refined manganese slag Pending CN112250344A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1277166A (en) * 2000-07-11 2000-12-20 李先华 Artificial white marble as building material
CN1429697A (en) * 2001-12-30 2003-07-16 廉绍周 Formulation of analogue white marble stone bridge and guard bar and its preparation method
CN1800077A (en) * 2006-01-17 2006-07-12 陈守能 Emulated white marble and its preparation process
WO2010071343A2 (en) * 2008-12-15 2010-06-24 Kim Young-Il Binder composition for artificial marble, artificial marble using same, and manufacturing method thereof
CN104402307A (en) * 2014-11-05 2015-03-11 上海宝田新型建材有限公司 Slag micropowder type artificial marble and preparation method thereof
CN109369020A (en) * 2018-10-09 2019-02-22 交城义望铁合金有限责任公司 A kind of calendering technology method producing devitrified glass or stone slab using liquid manganese slag

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1277166A (en) * 2000-07-11 2000-12-20 李先华 Artificial white marble as building material
CN1429697A (en) * 2001-12-30 2003-07-16 廉绍周 Formulation of analogue white marble stone bridge and guard bar and its preparation method
CN1800077A (en) * 2006-01-17 2006-07-12 陈守能 Emulated white marble and its preparation process
WO2010071343A2 (en) * 2008-12-15 2010-06-24 Kim Young-Il Binder composition for artificial marble, artificial marble using same, and manufacturing method thereof
CN104402307A (en) * 2014-11-05 2015-03-11 上海宝田新型建材有限公司 Slag micropowder type artificial marble and preparation method thereof
CN109369020A (en) * 2018-10-09 2019-02-22 交城义望铁合金有限责任公司 A kind of calendering technology method producing devitrified glass or stone slab using liquid manganese slag

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Application publication date: 20210122