SU1175927A1 - Method of manufacturing potash fertilizers - Google Patents

Abstract

1. METHOD FOR PRODUCING POTASSIUM FERTILIZER from ores containing clay spits, including operations of hydromechanical desliming, conditioning clay-salt slurry with spamming reagents, flotation de-shading followed by flotation of potassium chloride, a 0-str-отлич; potassium chloride and a reduction in reagent consumption, the clay-salt slurry is subjected to dispersion prior to conditioning with sludge collector reagents. 2. The method according to claim 1, characterized by the fact that the dispersion of the clay-salt suspension is carried out for 1-300 seconds.

Description

one

The invention relates to the processing of potash ores for the production of mineral fertilizers. The aim of the invention is to increase the recovery and quality of potassium chloride and reduce the consumption of reagents. Example. The potash ore, crushed to the fractional size, is subjected to deshamming in hydraulic pits and hydroseparators. As a result, the ozone ore is obtained in the form of Peskovy products of hydrocyclones and hydroseparators. Sands hydroseparator is subjected to further processing. A sample of sands of a hydroseparator in an amount of 50 g (HO content 2.44, 5%, KC1 22.6–26%) was loaded into a mixer with KC1 and NaCl saturated liquor (150 g) and mixed vigorously for 1–6 min. . Then, the suspension was transferred to a laboratory mechanical flotation machine, into the chamber of which reagents were injected: an E-1 collector (E-1 (alkypantracene pyridine x Loride), 0.8 ml of a 2% solution based on O20 g / t) and flocculant PAA 0.2 ml 0, 25% solution at the rate of 10 g / t and carried out sludge flotation. After removing the sludge in the machine from this sample, sylvinic flotation was performed using a sylvin collector - octadexlamine 0.8 ml of a 0.5% solution (80 g / t). As a result of flotation, for example, in the baseline experiment the following was obtained: sludge concentrate 3.9 g (7.7%), the content of NO - 25.1; COP 1 17.2%. The extraction of NFR 73.7% and the recovery of KS1 6.0% and sylvin concentrate: yield 15.7 g (31.3%), the content of KS1 63.9%, the recovery of 90.4%. As can be seen from the other results (Table 1), the preliminary dispersion of the suspension improves the slurry and sylvinate flotation indicators for all three samples. The recovery of CO in concentrate sludge flotaid increases by 1-7%, and KC1 decreases by 1-1.5%, depending on the dispersion time. The recovery of CS in sylvic concentrate is increased by 3%, and the BUT is reduced by 23%. The quality of sylvic concentration increases by an average of 1.5%. The optimal time of dispersion, calculated on the basis of the results of the experiments, as well as the performance of 72 real processing plants and commercially available mixers for the potash industry, was 2–5 min. The improvement of the technological parameters of the flotation process with the introduction of the dispersion operation occurs for the following reason. The sands of the hydroseparator are formed during the sedimentation process, accompanied by the aggregation of sludge particles with each other and their presence on the particles of halite and sylvite. In the process of pumping sand to the slurry flotation, ONLY partial disaggregation of sludge occurs, therefore the selectivity of the enrichment process is low. During dispersion, the sludge aggregates are destroyed to a greater extent, cleaning the surface of the minerals and, as a result, extraction of minerals into the concentrates of the same name will increase and the selectivity of the process will increase: the content of KC1 in the slurry product decreases and the content of NO in silshine concentrate. The dispersion process can be carried out in any apparatus, but the effectiveness of this process is achieved only when the suspension moves in the apparatus at a high velocity gradient, which ensures high shear stresses of the adjacent layers of the suspension. The effectiveness of the proposed method is estimated by the increase in the extracted; quality and quality of potassium chloride, reducing the consumption of reagent-depressant. The results of the experimental tests are presented in table. 2. The destruction efficiency of clay minerals in clay salt suspensions was monitored by extracting insoluble sediment in a class less than 45 µm, since in this size class clay minerals are in an expanded state, there is no intergrowth with other minerals. Results of dispersing clay – salt suspensions in vortex chamber are given in table. 3. (The processing time is about 1 s, the speed of the suspension in the inlet pipe is about 1.5-3.0 m / sJL

311759274

As can be seen from the table. 3 dispersion class - 0.045 mm from 82.2% to 90.3%

the suspension bath allows an increase in the clay content.

extraction of insoluble sediment non-minerals in the granular part of the suspension.

Table t

Claims (2)

1. METHOD FOR PRODUCING POTASSIUM FERTILIZERS from ores containing clay sludge, including hydromechanical de-slurry operations, conditioning clay-salt slurry with sludge collectors, flotation de-sludge followed by potassium chloride flotation, characterized in that, in order to increase the extraction and potassium chloride and reducing reagent consumption, the clay-slurry suspension is subjected to dispersion before conditioning with sludge-collecting reagents. 2. The method of pop. 1, distinguished _{by the} fact that the dispersion of the clay-salt suspension is carried out for 1-300 s. | * <„1175927>