RU2841849C1 - Crude mixture for producing ceramic materials for construction purposes based on oil industry wastes - Google Patents

Abstract

FIELD: production of construction materials.

SUBSTANCE: crude mixture for producing ceramic construction materials based on oil industry wastes contains the following, wt.%: medium-plastic clay of Vladimirovskoye deposit 30.0-50.0; drilling mud from Slavyanskoye deposit 50.0-70.0. Drilling mud of the Slavyanskoye deposit contains the following, wt.%: Na₂O 1.47; MgO 0.79; Al₂O₃ 5.41; SiO₂ 22.72; K₂O 0.91; CaO 4.44; TiO₂ 0.26; Fe₂O₃ 3.19; Mn 0.11; P₂O₅ 0.11; BaSO₄ 50.59; loss on ignition. LOI 10.00. Medium-plastic clay of the Vladimirovskoye deposit contains wt.%: SiO₂ 64.25; Al₂O₃ 20.88; Fe₂O₃ 4.48; CaO 0.74; MgO 0.79; TiO₂ 1.14; calcination losses 7.72.

EFFECT: improved physical and mechanical parameters of ceramic materials based on oil industry wastes for construction purposes, specifically achieving compression strength of not less than 25 MPa, water absorption of not less than 5%, density of 2.4-2, frost resistance of not less than 75 cycles, reduced environmental load.

1 cl, 5 ex

Description

The invention relates to the production of building materials based on waste from the oil-producing industry, namely to building ceramics, and can be used in the technology of producing ceramic materials for building purposes.

A method is known for producing a raw material mixture (RU patent 2 210 554; published on 20.08.2003, IPC 7 С04В 33/00) containing clay marl with a CaO content of 20.1-24.0%, zeolite-containing clay, and broken glass in the following ratio, wt.%:

Clayey marl with a CaO content of 20.1-24.0% 75-85 Zeolite containing clay 5-15 Glass breaker 3-10

The disadvantage of this invention is the complex cycle of preparation of the press powder, as well as the low physical and mechanical characteristics of the resulting product, namely strength and water absorption.

The closest in composition is the raw material mixture (RU patent 2 646 292; published 02.03.2018, IPC C04B 33/04, C04B 33/132), including clay, drill cuttings and broken glass, while the size of the components is no more than 0.32 mm, and the drill cuttings as the main component contain by-products of oil and gas production with a high content of calcium oxide CaO 21.28% with the following ratio of components, wt.%:

Low-melting clay 67-50 Drilling mud with CaO content of 21.28% 30-45 Glass breaker 3-5

The disadvantage of the prototype is the high content of clay in the raw material mixture - a non-renewable natural raw material, which leads to an increase in the cost of the technology for the production of ceramic building materials, and the low content of drilling mud in the raw material mixture negatively affects the level of environmental impact.

The objective of the invention is to reduce the environmental impact and increase the profitability of the production of building ceramic materials, as well as to maintain the integrity and homogeneity of the structure of the raw material throughout the entire technological cycle.

The technical result of this invention is the production of ceramic materials for construction purposes with improved physical and mechanical parameters, namely, compressive strength of at least 25 MPa, water absorption of at least 5%, density of 2.4-2.0, frost resistance of at least 75 cycles based on waste from the oil producing industry in a composition with medium-plastic clay.

The technical result is achieved due to the fact that in the raw material mixture for obtaining ceramic materials for construction purposes, oil production waste, namely drilling mud, is used as the main component, with the following ratio of components, wt.%:

Medium plastic clay 30.0-50.0 Drilling mud 50.0-70.0

In this case, drilling mud from the Slavyanskoye field in the Southern Federal District is used, which has the following chemical composition, wt.%:

The clay used as medium-plastic clay is the Vladimirovskoye deposit of the Southern Federal District, which is characterized by the following chemical composition, wt.%:

First, medium-plastic clay and drilling mud are dried to a residual moisture content of 4-6%, followed by grinding and sifting on a 008 sieve. Then, the components are thoroughly mixed according to the specified dosages, and the mass is uniformly moistened to a plastic state. The prepared raw mixture is left to age in a desiccator for 6-12 hours, after which samples with dimensions of 60 × 30 × 14 mm are formed, followed by drying at a temperature of 100 ° C and firing at a temperature of 1050 ° C. During firing, the temperature increased at a rate of 3 ° / min and was held at the final temperature for 30 minutes. Natural cooling lasts 10-14 hours. The physical and mechanical properties of the samples are determined in accordance with the requirements of GOST 530-2018 "Ceramic brick and stone. General specifications".

Example #1

The raw material mixture for obtaining ceramic materials for construction purposes has the following component composition, wt.%:

Vladimirovsky medium plastic clay deposits 20.0 Drilling mud from the Slavyanskoye field 80.0

Samples of ceramic materials are produced using the technology described above. As a result of determining the physical and mechanical properties of the samples, the following results were obtained:

1) compressive strength - 19.70 MPa;

2) water absorption - 15.77%;

3) average density - 1.98 g/ ^cm2 ;

4) frost resistance - F35.

The obtained indicators of the physical and mechanical properties of the samples, namely the compressive strength, average density and frost resistance, do not correspond to the technical result of this invention.

Example #2

The raw material mixture for obtaining ceramic materials for construction purposes has the following component composition, wt.%:

Vladimirovsky medium plastic clay deposits 30.0 Drilling mud from the Slavyanskoye field 70.0

Samples of ceramic materials are produced using the technology described above. As a result of determining the physical and mechanical properties of the samples, the following results were obtained:

1) compressive strength - 23.33 MPa;

2) water absorption - 14.67%;

3) average density - 2.03 g/ ^cm2 ;

4) frost resistance - F50.

The obtained indicators of the physical and mechanical properties of the samples, namely the compressive strength and frost resistance, do not correspond to the technical result of this invention.

Example #3

The raw material mixture for obtaining ceramic materials for construction purposes has the following component composition, wt.%:

Vladimirovsky medium plastic clay deposits 40.0 Drilling mud from the Slavyanskoye field 60.0

Samples of ceramic materials are produced using the technology described above. As a result of determining the physical and mechanical properties of the samples, the following results were obtained:

1) compressive strength - 29.34 MPa;

2) water absorption - 12.00%;

3) average density - 2.20 g/ ^cm2 ;

4) frost resistance - F75.

The obtained indicators of the physical and mechanical properties of the samples correspond to the technical result of this invention.

Example #4

The raw material mixture for obtaining ceramic materials for construction purposes has the following component composition, wt.%:

Vladimirovsky medium plastic clay deposits 50.0 Drilling mud from the Slavyanskoye field 50.0

Samples of ceramic materials are produced using the technology described above. As a result of determining the physical and mechanical properties of the samples, the following results were obtained:

1) compressive strength - 28.40 MPa;

2) water absorption - 11.11%;

3) average density - 2.26 g/ ^cm2 ;

4) frost resistance - F75.

The obtained indicators of the physical and mechanical properties of the samples correspond to the technical result of this invention, but in comparison with the indicators of the samples according to example No. 3, the compressive strength limit of the samples according to example No. 4 is lower.

Example #5

The raw material mixture for obtaining ceramic materials for construction purposes has the following component composition, wt.%:

Vladimirovsky medium plastic clay deposits 60.0 Drilling mud from the Slavyanskoye field 40.0

Samples of ceramic materials are produced using the technology described above. As a result of determining the physical and mechanical properties of the samples, the following results were obtained:

1) compressive strength - 28.00 MPa;

2) water absorption - 10.95%;

3) average density - 2.30 g/ ^cm2 ;

4) frost resistance - F75.

The obtained indicators of the physical and mechanical properties of the samples correspond to the technical result of this invention, but in comparison with the indicators of the samples according to example No. 3 and example No. 4, the compressive strength limit of the samples according to example No. 5 is lower.

In accordance with GOST 530-2018 "Ceramic brick and stone. General specifications" from the data obtained, it can be noted that the most optimal physical and mechanical properties are possessed by samples of example No. 3 with a content of 60% of drill cuttings in the raw mix. Samples according to example No. 1 and example No. 2, due to the lack of medium-plastic clay in the raw mix, have lower frost resistance indicators, as well as compressive strength. Samples according to example No. 4 and example No. 5 have high frost resistance and density indicators, the compressive strength limit, on the contrary, is lower than that of samples according to example No. 3.

Thus, in comparison with the prototype, the claimed raw material mixture for the production of ceramic materials for construction purposes has high physical and mechanical properties, while waste from the oil producing industry, namely drilling mud, is the main component in its composition (content 60%).

Claims (2)

A raw mix for producing ceramic materials for construction purposes based on waste from the oil producing industry, containing clay and drill cuttings, characterized in that it contains drill cuttings from the Slavyanskoye deposit, containing, by weight: _Na2O 1.47; MgO _0.79 ; _{Al2O3 5.41} ; SiO2 22.72; _K2O 0.91; CaO _{4.44 ;} TiO2 0.26; Fe2O3 3.19 _; Mn _0.11 ; _P2O5 0.11; BaSO4 _50.59 ; loss on ignition l.o.p. 10.00, and medium-plastic clay from the Vladimirovskoye deposit, containing, by weight: _SiO2 64.25; _{Al2O3 20.88} ; Fe ₂ O ₃ 4.48; CaO 0.74; MgO 0.79; TiO ₂ 1.14; p.p. 7.72, with the following ratio of components, wt.%: Vladimirovsky medium plastic clay deposits 30.0-50.0 Drilling mud from the Slavyanskoye field 50.0-70.0