RU2145584C1 - Composition of carbon-containing refractory material mass - Google Patents

Composition of carbon-containing refractory material mass Download PDF

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RU2145584C1
RU2145584C1 RU97118725A RU97118725A RU2145584C1 RU 2145584 C1 RU2145584 C1 RU 2145584C1 RU 97118725 A RU97118725 A RU 97118725A RU 97118725 A RU97118725 A RU 97118725A RU 2145584 C1 RU2145584 C1 RU 2145584C1
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carbon
composition
urea
mass
alkylresorcinol
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RU97118725A
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RU97118725A (en
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Б.И. Поляк
В.С. Осипчик
Н.Н. Тихонов
А.В. Иванов
Н.И. Соколова
Е.В. Кривокорытов
В.А. Кононов
В.К. Стурман
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Российский химико-технологический университет им.Д.И.Менделеева
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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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63472—Condensation polymers of aldehydes or ketones
    • C04B35/63484—Urea-formaldehyde condensation polymers
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/013—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics containing carbon
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)
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Abstract

FIELD: refractory materials. SUBSTANCE: composition contains refractory filler such as magnesium oxide, corundum, dolomite, silicon carbide, individually or in mixtures; carbonaceous component (3-30%); and binding agent: alkylresorcinol acid modified with urea-formaldehyde oligomer (5-30%). EFFECT: simplified hardening technology and improved environmental condition.

Description

Изобретение относится к области технологии изготовления углеродсодержащих огнеупоров на основе тугоплавких оксидов или карбида кремния и может быть использовано в огнеупорной и металлургической промышленности. The invention relates to the field of manufacturing technology of carbon-containing refractories based on refractory oxides or silicon carbide and can be used in the refractory and metallurgical industries.

Известны составы масс для изготовления углеродсодержащих огнеупоров из огнеупорного наполнителя, в качестве которого могут быть использованы корунд, оксид магния, доломит, карбид кремния, углеродистого компонента - графита, сажи или кокса и связующего в виде полимера, полученного гомополимеризацией резорцинола. Связующее представляет собой сухую термопластичную смесь резорцинола, изомеров дигидроксидифенила и изомеров тригидрокcидифенила с температурой размягчения около 80oC. Отверждение отформованной смеси требует весьма продолжительного нагрева до 300oC (I) (прототип).Mass compositions are known for the manufacture of carbon-containing refractories from a refractory filler, which can be used corundum, magnesium oxide, dolomite, silicon carbide, the carbon component is graphite, soot or coke and a binder in the form of a polymer obtained by homopolymerization of resorcinol. The binder is a dry thermoplastic mixture of resorcinol, dihydroxydiphenyl isomers and trihydroxydiphenyl isomers with a softening temperature of about 80 o C. The curing of the molded mixture requires a very long heating to 300 o C (I) (prototype).

Задачей данного изобретения является создание благоприятной экологической обстановки в производстве и эксплуатации, усовершенствование состава массы и процесса отверждения. Поставленная задача решается составом массы углеродсодержащих огнеупоров, который содержит огнеупорный наполнитель, например оксид магния, корунд, доломит, карбид кремния по отдельности и в смеси, углеродистый компонент в виде графита, сажи или кокса и связующее - алкилрезорциновую смолу, модифицированную карбамидформальдегидным олигомером, вводимым в количестве 5-20% от содержания алкилрезорциновой смолы, при следующем соотношении компонентов, мас.%: алкилрезорциновая смола, модифицированная карбамидформальдегидным олигомером - 5-30, углеродистый компонент - 3-30, огнеупорный наполнитель - остальное. The objective of the invention is to create a favorable environmental situation in production and operation, to improve the composition of the mass and the curing process. The problem is solved by the composition of the mass of carbon-containing refractories, which contains a refractory filler, for example magnesium oxide, corundum, dolomite, silicon carbide individually and in a mixture, a carbon component in the form of graphite, soot or coke and a binder - an alkylresorcinol resin modified with a urea-formaldehyde oligomer introduced into the amount of 5-20% of the content of alkylresorcinol resin, in the following ratio of components, wt.%: alkylresorcinol resin modified with a urea-formaldehyde oligomer - 5-30, the antimicrobial component is 3-30, the refractory filler is the rest.

Отличие предложенного состава массы от известного заключается в использовании в качестве связующего алкилрезоциновой смолы, модифицированной карбамидформальдегидным олигомером, вводимым в количестве 5-20% от содержания алкилрезорциновой смолы. The difference between the proposed composition of the mass from the known one is the use of an alkylresocine resin modified with a urea-formaldehyde oligomer, introduced in an amount of 5-20% of the content of alkylresorcinol resin, as a binder.

Такая совокупность признаков для упрощения состава массы и процесса ее отверждения в литературе неизвестна. Such a set of features to simplify the composition of the mass and the process of its curing in the literature is unknown.

Пример 1. Example 1

Состав массы для карбидкремниевых огнеупоров. Mass composition for silicon carbide refractories.

Следующие компоненты массы смешивают в количестве, кг:
Карбамид кремния зеленый N 63, 12, 4 - 90
Сажа - 10
Алкилрезоциновая смола, модифицированная карбамидформальдегидным олигомером - 17
Затем из нее формуют карбидкремниевые огнеупорные изделия выдавливанием через мундштук и отверждают при температуре 100oC в течение 4 ч. Обжиг изделий проводят в силицирующих засыпках при температуре 1800oC.The following mass components are mixed in quantity, kg:
Silicon carbamide green N 63, 12, 4 - 90
Soot - 10
Alkylresocin resin modified with urea-formaldehyde oligomer - 17
Then, silicon carbide refractory products are formed from it by extrusion through the mouthpiece and cured at a temperature of 100 o C for 4 hours. The products are fired in siliconizing fillings at a temperature of 1800 o C.

Свойства массы и полученный карбидкремниевых огнеупорных изделий:
Потери при прокаливании массы, % - 9 - 10
Пористость, % - 23 - 25
Удельное электросопротивление (1000oC), Ом • см - 0,82
Пример 2.The properties of the mass and the resulting silicon carbide refractory products:
Loss on ignition mass% - 9 - 10
Porosity,% - 23 - 25
Electrical resistivity (1000 o C), Ohm • cm - 0.82
Example 2

Состав массы для периклазографитовых огнеупоров
Следующие компоненты массы смешивают в количестве, кг:
Оксид магния - 100
Графит - 2
Алкилрезорциновая смола, модифицированная карбамидформальдегидным олигомером - 10, 17
Затем из нее прессуют изделия для разливки стали на гидропрессе при давлении 20 МПа и отверждают при температуре 130oC в течение 6 ч.The composition of the mass for periclase-graphite refractories
The following mass components are mixed in quantity, kg:
Magnesium Oxide - 100
Graphite - 2
Alkylresorcinol resin modified with urea-formaldehyde oligomer - 10, 17
Then, steel products are pressed from it for steel casting on a hydraulic press at a pressure of 20 MPa and solidified at a temperature of 130 o C for 6 hours.

Свойства полученных периклазографитовых огнеупоров изделий:
Кажущаяся плотность, г/см3 - 2,73 - 2,77
Открытая пористость, % - 10,3 - 10,5
Предел прочности при сжатии при 20oC, Н/мм2 - 24 - 32
Предлагаемый состав массы углеродсодержащих огнеупоров на основе огнеупорного наполнителя, такого как оксид магния, корунд, доломит, карбид кремния по отдельности и в смеси, углеродистого компонента в виде графита, сажи или кокса и связующего - алкилрезорциновой смолы, которая содержит в качестве модификатора карбамидформальдегидный олигомер. Это улучшает экологические условия производства и эксплуатации и способствует упрощению технологического процесса производства углеродсодержащих огнеупоров и футеровок конвертеров.Properties of the obtained periclase-graphite refractory products:
The apparent density, g / cm 3 - 2.73 - 2.77
Open porosity,% - 10.3 - 10.5
The compressive strength at 20 o C, N / mm 2 - 24 - 32
The proposed composition of the mass of carbon-containing refractories based on a refractory filler, such as magnesium oxide, corundum, dolomite, silicon carbide individually and in a mixture, the carbon component in the form of graphite, soot or coke and a binder - alkylresorcinol resin, which contains a urea-formaldehyde oligomer as a modifier. This improves the environmental conditions of production and operation and helps to simplify the technological process for the production of carbon-containing refractories and converter linings.

Claims (1)

Состав массы углеродсодержащих огнеупоров, содержащий огнеупорный наполнитель, например оксид магния, корунд, доломит, карбит кремния по отдельности или в смеси, углеродистый компонент в виде графита, сажи или кокса и резорцинсодержащее органическое связующее, отличающийся тем, что он содержит в качестве связующего алкилрезорциновую смолу, модифицированную карбамидформальдегидным олигомером, вводимым в количестве 5 - 20% от содержания алкилрезорциновой смолы, при следующем соотношении компонентов, мас.%:
Алкилрезорциновая смола, модифицированная карбамидформальдегидным олигомером - 5 - 30
Углеродистый компонент - 3 - 30
Огнеупорный наполнитель - ОстальноеThe composition of the mass of carbon-containing refractories containing a refractory filler, for example magnesium oxide, corundum, dolomite, silicon carbite individually or in a mixture, a carbon component in the form of graphite, soot or coke and a resorcinol-containing organic binder, characterized in that it contains an alkylresorcinol resin as a binder modified with a urea-formaldehyde oligomer, introduced in an amount of 5 to 20% of the content of alkylresorcinol resin, in the following ratio, wt.%:
Alkylresorcinol resin modified with urea-formaldehyde oligomer - 5 - 30
Carbon component - 3 - 30
Refractory Filler - Else
RU97118725A 1997-10-29 1997-10-29 Composition of carbon-containing refractory material mass RU2145584C1 (en)

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