EA023453B1

EA023453B1 - Method for processing carbonate raw material (variants)

Info

Publication number: EA023453B1
Application number: EA201301326A
Authority: EA
Inventors: Дмитрий Владимирович Писаренко
Original assignee: Дмитрий Владимирович Писаренко
Priority date: 2013-10-30
Filing date: 2013-10-30
Publication date: 2016-06-30
Also published as: EA201301326A1

Abstract

Technical result of the disclosed method for processing carbonate raw material (variants) for production of magnesial binding substances or lime consists in increase of coefficient of raw material application, its thorough fractionation, improved quality of final products and reduction of energy consumption. Technical result is achieved due to the fact that obtaining magnesial binding agent and lime is realised by processing carbonate raw material by supercritical fluid extraction (SCFE) with application as extragent of supercritical carbon dioxide (CO-fluid), which acts as heat carrier to provide process of decarbonisation of carbonate raw material and solvent in thorough processing of initial raw material in form of flour or powder with particle size from 0 to 1 mm.

Description

(57) Техническим результатом предложенного способа обработки карбонатного сырья (варианты) для производства магнезиальных вяжущих веществ или извести является увеличение коэффициента использования сырья, его углубленное фракционирование, повышение качества конечных продуктов и уменьшение энергетических затрат. Технический результат достигается за счет того, что получение магнезиального вяжущего и извести производится обработкой карбонатного сырья путем сверхкритической флюидной экстракции (СКФЭ) с использованием в качестве экстрагента сверхкритического диоксида углерода (СО₂-флюид), который выполняет роль теплоносителя для обеспечения процесса декарбонизации карбонатного сырья и растворителя при глубокой переработке исходного сырья в виде муки или порошка с размерами частиц от 0 до 1 мм.(57) The technical result of the proposed method for processing carbonate raw materials (options) for the production of magnesia binders or lime is to increase the utilization of raw materials, their in-depth fractionation, improving the quality of the final products and reducing energy costs. The technical result is achieved due to the fact that the production of magnesian binder and lime is carried out by processing carbonate raw materials by supercritical fluid extraction (SCFE) using supercritical carbon dioxide (CO ₂ fluid) as an extractant, which acts as a coolant for the process of decarbonization of carbonate raw materials and solvent during deep processing of the feedstock in the form of flour or powder with particle sizes from 0 to 1 mm

023453 Β1023453 Β1

Claims

1. The method of processing carbonate raw materials (option 1) to obtain a magnesian binder, including its processing in a gas stream in the process of decarbonization of the source, for example dolomite raw materials, its decomposition into magnesium oxide, carbon dioxide and other components, characterized in that as a gas stream supercritical carbon dioxide (CO2-fluid) is used, which is precompressed and heated, the feedstock is processed in two stages, and the dolomite feedstock is heated at the first stage by ntaktirovaniya with the extractant - Fluid flow of CO2 at a temperature and pressure above the critical point, and is recovered from the feedstock soluble components, and the second stage of CO ₂ extractant is regenerated by depressurization and / or temperature changes, thus releasing the substance dissolved therein.

2. The method according to claim 1, characterized in that at the first stage, the CO _{2 is} precompressed to a predetermined pressure of 72.8-118 atm, heated to a predetermined temperature of 250-450 ° C, and a fluid flow rate is provided within, equal to 1-100 volumes of the original dolomite raw material per hour.

3. The method according to claim 1, characterized in that during the extraction process, a fluid stream of CO ₂ with a predetermined component dissolved in it is directed to a precipitant, where precipitated components are precipitated and accumulated from it at given technological parameters.

4. The method according to one of claims 1 to 3, characterized in that at the first stage, electrolytes, for example No. C1, are mixed with dolomite raw materials. KC1, MgC1 ₂ in a ratio of 1 to 50% of its original mass.

5. The method of processing carbonate raw materials (option 2) to produce lime, including its processing in a gas stream in the process of decarbonization of the feedstock, for example limestone, its decomposition into calcium oxide, carbon dioxide and other components, characterized in that the gas stream is used supercritical carbon dioxide (CO2-fluid), which is pre-compressed and heated, the processing of the feedstock is carried out in two stages, at the first stage, the limestone raw material is heated by contacting it Extractant - Fluid CO2 stream at temperatures and pressures above the critical point, and is recovered from the soluble components of the raw material, and the second stage of CO ₂ extractant is regenerated by depressurization and / or temperature changes, thus releasing the substance dissolved therein.

6. The method according to claim 5, characterized in that at the first stage, pre-compressed CO ₂ to a predetermined pressure of 72.8-118 atm, heated to a predetermined temperature of 450-650 ° C and provide a fluid flow rate in the range of 1-100 the volume of the initial mass of limestone per hour.

7. The method according to claim 5, characterized in that during the extraction process, a fluid stream of CO ₂ with a predetermined component dissolved in it is directed to a precipitant, where precipitated components are precipitated and accumulated from it at given technological parameters.

8. A process according to one of claims 5-7, characterized in that the first phase is admixed to the substance limestone electrolytes YaS1 e.g., KC1, M§S1 ₂ in a ratio of 1 to 50% of its original weight.