EA003660B1 - Method for processing solid wastes from sludge in aluminum production - Google Patents

Method for processing solid wastes from sludge in aluminum production Download PDF

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EA003660B1
EA003660B1 EA200100911A EA200100911A EA003660B1 EA 003660 B1 EA003660 B1 EA 003660B1 EA 200100911 A EA200100911 A EA 200100911A EA 200100911 A EA200100911 A EA 200100911A EA 003660 B1 EA003660 B1 EA 003660B1
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EA
Eurasian Patent Office
Prior art keywords
sludge
minutes
sintered
degree
processing solid
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EA200100911A
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Russian (ru)
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EA200100911A1 (en
Inventor
Ульмас Мирсаидов
Хайдар Сафиев
Бозорали Азизов
Джура Рузиев
Джамиля Лангариева
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Отдел Водных Проблем И Экологии Ан Рт
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Priority to EA200100911A priority Critical patent/EA003660B1/en
Publication of EA200100911A1 publication Critical patent/EA200100911A1/en
Publication of EA003660B1 publication Critical patent/EA003660B1/en

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Abstract

1. A method for processing solid wastes from sludge, comprising the steps of sludge sintering, grinding, cake leaching with water and pulp filtering, characterized in that the sludge is sintered without preliminary washing from sulfates and carbonates. 2. The method of claim 1, characterized in that the sludge is sintered at a continuous air access at 750 to 850 degree C during 20-40 minutes. 3. The method of claim 1, characterized in that the sludge is ground at 70-80 degree C with ratio solids/liquid from 1:3 to 1:5 during 30-60 minutes. 4. The method of claim 1 and 3, characterized in that the solid waste comprising cryolite and alumina is used as raw material after drying at 100-150 degree C during 30-60 minutes. 5. The method of claim 1 and 3, characterized in that a solution comprising sodium hydroaluminate is used as alkali coagulant.

Description

Изобретение относится к способам переработки отходов производства алюминия.The invention relates to methods of recycling aluminum production.

Известен способ переработки отходов шламового поля Таджикского алюминиевого завода, который позволяет выделить полезные составляющие путем превращения сульфатов в карбонаты и флотированием отделить уголь от криолита и глинозема [I]. Однако этот способ требует предварительной отмывки шлама от сульфатов и карбонатов, а затем флотации шлама с получением криолит-глиноземной смеси.A known method of processing waste sludge field of the Tajik aluminum plant, which allows you to select useful components by converting sulfates into carbonates and floatation to separate the coal from cryolite and alumina [I]. However, this method requires pre-washing the sludge from sulphates and carbonates, and then flotation of the sludge to obtain a cryolite-alumina mixture.

Цель изобретения - создание безотходной технологии, улучшение экологической среды, выделение из отходов полезных составляющих, получение щелочного коагулянта, расширение сырьевой базы и снижение себестоимости производимого алюминия.The purpose of the invention is the creation of waste-free technology, improvement of the ecological environment, the selection of useful components from waste, obtaining an alkaline coagulant, expanding the resource base and reducing the cost of aluminum produced.

Поставленная цель достигается тем, что шлам спекают при постоянном доступе воздуха при 750-850°С в течение 20-40 мин. Спек измельчают, выщелачивают водой при 70-80°С, при соотношении Т:Ж от 1:3 до 1:5, в течение 30-90 мин. Пульпу фильтруют, раствор используют в качестве щелочного коагулянта для очистки сточных и питьевых вод, а осадок после сушки при 100-150°С в течение 30-60 мин используют в качестве сырья для производства алюминия.This goal is achieved by the fact that the slurry is sintered with a constant access of air at 750-850 ° C for 20-40 minutes. The spec is ground, leached with water at 70-80 ° C, with a ratio of T: W from 1: 3 to 1: 5, for 30-90 minutes. The pulp is filtered, the solution is used as an alkaline coagulant for cleaning wastewater and drinking water, and the residue after drying at 100-150 ° C for 30-60 minutes is used as a raw material for the production of aluminum.

Пример г шлама, содержащего мас.%: 29,2 ИазА1Е6; 16,0 А12О3; 31,6 С; 9,6 Иа2ЗО4; 8,0 Иа2СО3 + ИаНСО3; 3,2 ΝαΕ; 0,4 Те2О3 спекают при 800°С в течение 30 мин.Example g of sludge containing wt.%: 29,2 IazA1E 6 ; 16.0 A1 2 O 3 ; 31.6 C; 9.6 Ea 2 ZO 4 ; 8.0 Ia 2 CO 3 + IANSO 3 ; 3.2 ΝαΕ; 0.4 Te 2 O 3 is sintered at 800 ° C for 30 minutes.

Спек (14,8 г) измельчают и выщелачивают водой при 80°С, при Т:Ж = 1:4 в течение 60 мин. Пульпу фильтруют, раствор, содержащий г/л:The spec (14.8 g) is crushed and leached with water at 80 ° C, at T: W = 1: 4 for 60 minutes. The pulp is filtered, a solution containing g / l:

28,8 А12О3; 18,4 №28О4; 3,8 ΝαΕ; 18,6 №2О; 3,5 81О2; 0,5 Ее2О3 является эффективным щелочным коагулянтом. Осадок (9 г), высушенный при 150°С в течение 40 мин, содержит, мас.%:28.8 A1 2 O 3 ; 18.4 No. 2 8О 4 ; 3.8 ΝαΕ; 18.6 No. 2 O; 3.5 81O 2 ; 0.5 E 2 O 3 is an effective alkaline coagulant. The precipitate (9 g), dried at 150 ° C for 40 min, contains, wt%:

62,5 Να3Α1Ε6; 20,0 А12О3; 1,8 С; 2,1 Ее2О3; 1,8. Предлагаемым способом можно переработать твердые отходы шламового поля алюминиевого производства без предварительной их отмывки.62.5 Να 3 Α1Ε 6 ; 20.0 A1 2 O 3 ; 1.8 C; 2.1 Her 2 O 3 ; 1.8. The proposed method can recycle solid waste slurry field of aluminum production without prior washing them.

Утилизация этих отходов позволит улучшить экологическую обстановку, получить сырье для производства алюминия и щелочной коагулянт для очистки питьевых и сточных вод.Disposal of these wastes will improve the environmental situation, obtain raw materials for the production of aluminum and alkaline coagulant for the purification of drinking and waste waters.

Химический состав исходного сырья твердых отходов шламового поля производства алюминия, промежуточных и конечных продуктов его переработки приведен в таблице.The chemical composition of the raw material of solid waste sludge field aluminum production, intermediate and final products of its processing are shown in the table.

Состав исходного сырья и продуктов его переработкиThe composition of the feedstock and its products

Вещество Substance Содержание в шламе, % The content in the sludge,% Содержание в спеке, мас.% The content in the specimen, wt.% Содержание в высушенном осадке, мас.% The content in the dried sediment, wt.% Содержание в растворе, г/л Content in solution, g / l Να3Α1Ε6 Να3Α1Ε6 25,0-35,0 25.0-35.0 30,0-40,0 30.0-40.0 55,0-65,0 55.0-65.0 - - А12О3 A1 2 O 3 15,0-20,0 15.0-20.0 25,0-30,0 25.0-30.0 18,0-24,0 18.0-24.0 25,0-30,0 25.0-30.0 С WITH 20,0-35,0 20.0-35.0 0,5-1,5 0.5-1.5 1,0-2,0 1.0-2.0 - - №28О4 № 2 8О 4 5,0-10,0 5.0-10.0 8,0-12,0 8.0-12.0 - - 15,0-20,0 15.0-20.0 + ХаИСО,, + HAISO ,, 5,0-10,0 5.0-10.0 \’;ьО \ ’; О - - 9,0-12,0 9.0-12.0 - - 15,0-20,0 15.0-20.0 ΝαΕ ΝαΕ 3,0-5,0 3.0-5.0 5,0-8,0 5.0-8.0 6,0-9,0 6.0-9.0 3,0-5,0 3.0-5.0 Ее2О3 Her2O3 0,3-0,5 0.3-0.5 0,5-0,8 0.5-0.8 1,9-2,4 1.9-2.4 0,5-1,0 0.5-1.0 81О2 81O2 0,8-1,2 0.8-1.2 1,2-1,4 1.2-1.4 1,5-2,0 1.5-2.0 3,0-5,0 3.0-5.0

Источники информацииInformation sources

1. Способ переработки отходов шламового поля производства алюминия. Патент на изобретение Т1 147. Дата приоритета 29.12.941. The method of processing waste sludge field aluminum production. Patent for invention T1 147. Priority date 29.12.94

Claims (5)

ФОРМУЛА ИЗОБРЕТЕНИЯCLAIM 1. Способ переработки твердых отходов шламового поля, заключающийся в спекании шлама, измельчении и выщелачивании спека водой и фильтровании пульпы, отличающийся тем, что шлам спекают без предварительной отмывки от сульфатов и карбонатов.1. The method of processing solid waste sludge field, which consists in sintering the sludge, grinding and leaching the cake with water and filtering the pulp, characterized in that the sludge is sintered without prior washing from sulfates and carbonates. 2. Способ по п.1, отличающийся тем, что шлам спекают при постоянном доступе воздуха при 750-850°С в течение 20-40 мин.2. The method according to claim 1, characterized in that the sludge is sintered with constant access of air at 750-850 ° C for 20-40 minutes 3. Способ по п.1, отличающийся тем, что спек измельчают и выщелачивают водой при 7080°С при соотношении Т:Ж от 1:3 до 1:5 в течение 30-60 мин.3. The method according to claim 1, characterized in that the cake is ground and leached with water at 7080 ° C at a ratio of T: W from 1: 3 to 1: 5 for 30-60 minutes 4. Способ по пп.1 и 3, отличающийся тем, что твердый остаток, содержащий криолит и глинозем, после сушки при 100-150°С в течение 30-60 мин используют в качестве сырья для производства алюминия.4. The method according to claims 1 and 3, characterized in that the solid residue containing cryolite and alumina, after drying at 100-150 ° C for 30-60 minutes, is used as a raw material for the production of aluminum. 5. Способ по пп.1 и 3, отличающийся тем, что раствор, содержащий гидроалюминат натрия, используют в качестве щелочного коагулянта.5. The method according to claims 1 and 3, characterized in that the solution containing sodium hydroaluminate is used as an alkaline coagulant.
EA200100911A 2001-08-03 2001-08-03 Method for processing solid wastes from sludge in aluminum production EA003660B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA015635B1 (en) * 2010-09-24 2011-10-31 Гу "Нии Металлургии" Гуп "Талко" Method for processing solid wastes from sludge in aluminum production

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* Cited by examiner, † Cited by third party
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RU2711070C2 (en) * 2018-05-07 2020-01-15 Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" УрФУ Method of recycling slimes of aluminum production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA015635B1 (en) * 2010-09-24 2011-10-31 Гу "Нии Металлургии" Гуп "Талко" Method for processing solid wastes from sludge in aluminum production

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