RU95100711A - Method of preparing complex fertilizer
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Method of preparing complex fertilizer
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Publication number
RU95100711A
RU95100711ARU95100711/25ARU95100711ARU95100711ARU 95100711 ARU95100711 ARU 95100711ARU 95100711/25 ARU95100711/25 ARU 95100711/25ARU 95100711 ARU95100711 ARU 95100711ARU 95100711 ARU95100711 ARU 95100711A
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Application filed by Гомельский химический заводfiledCriticalГомельский химический завод
Priority to RU95100711/25ApriorityCriticalpatent/RU95100711A/en
Publication of RU95100711ApublicationCriticalpatent/RU95100711A/en
FIELD: agriculture, superphosphate fertilizer production. SUBSTANCE: suspension resulting from sulfuric acid effected decomposition of phosphorous material is neutralized with ammonia to pH 3-4, while in the neutralization stage extraction phosphoric acid is added to ratio PO:SO= 1: (0.4-0.9). EFFECT: increased strength of grains and reduced dust losses.
Claims (1)
Способ относится к технологии получения гранулированных сложных минеральных удобрений на основе суперфосфата. Цель: повышение прочности гранул и снижение пылеуноса. Это достигается в основном благодаря тому, что суспензию после сернокислотного разложения фоссырья нейтрализуют аммиаком до рН 3 - 4, причем на стадии нейтрализации вводят экстракционную фосфорную кислоту до соотношения Р205 : S04 = 1 : 0,4 - 0,9. Изобретение может быть использовано на предприятиях, производящих гранулированные фосфорные удобрения на основе сернокислотной переработки фосфатного сырья.The method relates to a technology for producing granular complex mineral fertilizers based on superphosphate. Purpose: increasing the strength of granules and reducing dust. This is achieved mainly due to the fact that the suspension after sulfuric acid decomposition of the fossy is neutralized with ammonia to pH 3-4, and extraction phosphoric acid is introduced into the neutralization stage to a ratio of P 2 0 5 : S0 4 = 1: 0.4 - 0.9. The invention can be used in enterprises producing granular phosphate fertilizers based on sulfuric acid processing of phosphate raw materials.
RU95100711/25A1995-01-171995-01-17Method of preparing complex fertilizer
RU95100711A
(en)
Polyphosphoric acid calcium magnesium fertilizer, polyphosphoric acid calcium magnesium fertilizer prepared by using phosphoric acid and phosphorus tailings as raw materials and preparation method therefor