SU659190A1

SU659190A1 - Method of treating silvinite ores

Info

Publication number: SU659190A1
Application number: SU752169268A
Authority: SU
Inventors: Анатолий Ибрагимович Мамедов; Владимир Валентинович Вязовов; Симон Израилевич Вайнюнский; Лев Александрович Кондратов; Рудольф Сергеевич Пермяков; Станислав Николаевич Титков; Петр Александрович Дробязко
Original assignee: Всесоюзный научно-исследовательский и проектный институт галургии
Priority date: 1975-08-18
Filing date: 1975-08-18
Publication date: 1979-04-30

Description

II

Изобретение относитс к области обогащени полезных ископае.мых, а именно к химическому обогащению сильвинитовыхThe invention relates to the field of mineral processing, namely, chemical enrichment of sylvinite

руд- Известен способ комбинированной переработки сильвинитовых руд, при котором методом электростатической сепарации выдел ютс галитовые хвосты, а обогащенный по хлористому калию продукт поступает на флотационное обогащение с получением калийного концентрата 1.ores - There is a known method of combined processing of sylvinite ores, in which halite tailings are separated by electrostatic separation, and the product enriched in potassium chloride is supplied to flotation concentration with the production of potassium concentrate 1.

Дл этого способа характерен больщой объем затрат на подогрев руды и охлаждение хвостов, низкое извлечение хлористого кали при достижении его высокого качества .This method is characterized by a large volume of costs for heating the ore and cooling the tailings, low extraction of potassium chloride while achieving its high quality.

Наиболее близким к изобретению по технологическому процессу вл етс способ переработки сильвинитовых руд, включающий нагрев предварительно измельченного исходного материала при температуре 80-120°С с одновременной обработкой реагентами, электростатическую сепарацию и последующую химическую переработку путем галургического передела, причем на химическую переработку направл ют концентрат электросепарации , а хвосты, содержащие 5% хлористого кали -в отвал 2. Однако при таком способе переработки сильвинитовых руд увеличиваетс содержание хлористого кали в концентрате, поступающем на галургический передел, а это нецелесообразно , так как основные издержки производства при галургическом способе св заны с количеством извлекаемого хлористого кали , поэтому увеличение содержани The closest to the invention according to the technological process is the method of processing sylvinite ores, including heating the pre-crushed starting material at a temperature of 80-120 ° C with simultaneous processing with reagents, electrostatic separation and subsequent chemical processing by halurgic redistribution, and electro-separation concentrate is sent for chemical processing , and tails containing 5% potassium chloride are dump 2. However, with this method of processing sylvinite ores, soda increases neigh potassium chloride concentrate entering at halurgical redistribution, and it is impractical, as the main costs in producing halurgical process associated with the amount of extractable potassium chloride, so increasing content

хлористого кали в продукте (концентрате ), поступающем на галургическую переработку , приводит к увеличению затрат на сооружение дополнительного оборудовани (сгустителей, кристаллизаторов и т.д.) и к увеличению количества оборотных щелоков.potassium chloride in the product (concentrate) supplied for halurgic processing leads to an increase in the cost of building additional equipment (thickeners, crystallizers, etc.) and to an increase in the number of circulating liquors.

Целью изобретени вл етс уменьшение потерь хлористого кали и повыщение производительности галургического передела.The aim of the invention is to reduce the loss of potassium chloride and increase the productivity of halurgic processing.

Claims

The goal is achieved by the fact that in the method of processing sylvinite ores, including heating pre-crushed raw material at a temperature of 80-120 ° C with simultaneous processing with reagents, electrostatic separation and subsequent chemical processing by halurgic redistribution, the electrostatic separation tailings are sent to the latter, not less than 1015% potassium chloride. Example. The ore with a particle size of -3 + 0 mm is heated in a fluidized bed apparatus at a temperature of 110 ° C with simultaneous treatment with benzenesulfonic acid (200 g / t). The ore thus prepared is sent to an electrostatic separator. After separation, a concentrate is obtained with a content of 1UG potassium chloride. Electroseparation tails with a potassium chloride content of 10–15% (depleted ore) are sent to chemical (halurgic) processing, as a result of which concentrate (95%) and halite tailings (waste) are obtained. Extraction of potassium chloride in the concentrate obtained after electrostatic separation is 30-70%. Isolation of potassium chloride by the method of electrostatic separation of less than 30% of the original product makes a combination of these methods unprofitable, since with additional electroseparation the content of potassium chloride in the product entering the halurgical processing is high and the economic effect is small. Extraction of more than 70% into the electrical separation concentrate also makes this process economically inexpedient, since a small amount of potassium chloride (less than 30%) makes a complicated halurgical scheme, and in addition, the degree of utilization of heat energy decreases. The proposed method of processing sylvinite ores will increase the integrated use of raw materials, and for a potash plant with a capacity of 3.5 million standard tukas, an economic effect of 3-5 million rubles will be obtained. in year. Claims of Invention A method of processing sylvinite ores, including heating a pre-crushed starting material at a temperature of 80-120 ° C with simultaneous processing, treating with reagents, electrostatic separation and subsequent chemical processing by halurgical conversion, characterized in that in order to reduce losses potassium chloride and increased productivity of halurgic processing; electrostatic separation tailings containing not less than 10-15% potassium chloride are sent to the latter. Sources of information taken into account in the examination 1.Patent of Germany No. 1938973, cl. 12 I 3/02, 1969.

2. US patent number 2927010, cl. 23-297, 1967.