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Multi-element comprehensive utilization process for phosphorus-potassium associated ore

A phosphorus-potassium associated ore, multi-element technology, applied in the application, fertilizer mixture, fertilization device and other directions, can solve the problems of affecting normal production, unavailability of tailings, waste of resources, etc., to achieve easy implementation, good promotion and application prospects, leaching low temperature effect

Active Publication Date: 2016-03-02
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flotation method currently has problems such as high cost, a large amount of tailings that cannot be used, and some flotation agents entering the production process and affecting normal production.
except P 2 o 5 、K 2 In addition to O, phosphorus and potassium associated ores also include SiO 2 、Al 2 o 3 , CaO, Fe 2 o 3 , MgO, etc., if the elements other than phosphorus and potassium are not used and discarded, it is a great waste of resources

Method used

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  • Multi-element comprehensive utilization process for phosphorus-potassium associated ore
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A multi-element comprehensive utilization process of phosphorus and potassium associated ore, the process flow chart is shown in figure 1 , including the following steps:

[0055] 1) Ingredients: Crushing and grinding the phosphorus and potassium associated ore, taking 80 g of the ground phosphorus and potassium associated ore, mixing with 8 g of calcium fluoride and 320 mL of hydrochloric acid solution (mass concentration: 22.5%) to obtain a mixture liquid;

[0056] 2) Acid leaching: carry out the leaching reaction of the mixed material liquid obtained in step 1) at a temperature of 90° C., and carry out solid-liquid separation after 4 hours of reaction to obtain silica filter residue and filtrate I; The leaching rate of potassium element is 92.5%, the leaching rate of aluminum element is 93%, the leaching rate of phosphorus, calcium and magnesium elements is nearly 99%, the leaching rate of iron element is 52%, and about 8% of silicon element exists in the leach solut...

Embodiment 2

[0062] A multi-element comprehensive utilization process of phosphorus and potassium associated ore, specifically comprising the following steps:

[0063] 1) Ingredients: crush and grind the phosphorus and potassium associated ore, take 80 g of the ground phosphorus and potassium associated ore, mix it with 4 g of magnesium fluoride and 160 mL of hydrochloric acid solution (mass concentration: 15%), to obtain a mixture liquid;

[0064] 2) Acid leaching: carry out the leaching reaction of the mixed material liquid obtained in step 1) at a temperature of 70°C, and perform solid-liquid separation after 4 hours of reaction to obtain silica filter residue and filtrate I; the leaching rate of potassium element in the ore is detected by AAS 72.5%, the leaching rate of aluminum is 80.5%, the leaching rate of phosphorus, calcium, and magnesium is nearly 80%, the leaching rate of iron is 45%, and about 6% of silicon exists in the leaching solution; the obtained silica filter residue is w...

Embodiment 3

[0070] A multi-element comprehensive utilization process of phosphorus and potassium associated ore, specifically comprising the following steps:

[0071] 1) Ingredients: crush and grind the phosphorus and potassium associated ore, take 80 g of the ground phosphorus and potassium associated ore, mix it with 4 g of magnesium fluoride and 160 mL of hydrochloric acid solution (mass concentration: 15%), to obtain a mixture liquid;

[0072] 2) Acid leaching: carry out the leaching reaction of the mixed material liquid obtained in step 1) at a temperature of 70°C, and perform solid-liquid separation after 4 hours of reaction to obtain silica filter residue and filtrate I; the leaching rate of potassium element in the ore is detected by AAS 72.5%, the leaching rate of aluminum is 80.5%, the leaching rate of phosphorus, calcium, and magnesium is nearly 80%, the leaching rate of iron is 45%, and about 6% of silicon exists in the leaching solution; the obtained silica filter residue is w...

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Abstract

The present invention discloses a multi-element comprehensive utilization process for phosphorus-potassium associated ore. The process comprises: firstly, a fluorine-containing compound is used as an additional aid, and a leaching reaction of the phosphorus-potassium associated ore at a low temperature under an acidic condition is implemented, so as to obtain a silica residue and a leachate. The steps of calcium removal, hydrochloric acid distillation and neutralization are then performed successively to the resulting leachate, so as to obtain a calcium sulfate residue, a heavy iron residue, a heavy aluminum residue, a heavy magnesium residue, and a filtrate. The resulting filtrate is then supplemented with phosphorus, evaporated, and concentrated, so as to obtain a high concentration of NPK compound fertilizer. According to the process provided by the present invention, the fluorine-containing compound is used as the additional aid and hydrochloric acid is used as a leaching agent to process the phosphorus-potassium associated ore. Potassium feldspar is decomposed by means of a reaction of villiaumite and an acid to generate hydrofluoric acid in situ, effectively implementing a process of complete decomposition, complete separation and complete utilization. The process has advantages of low energy consumption, a high element leaching rate, and simple subsequent treatment processes, etc. No discharge problem of three waste exists in the treatment process. In addition, the involved process is simple and the reaction conditions are mild, so that the process is easy to implement and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of phosphorus inorganic chemical industry, in particular to a multi-element comprehensive utilization process of phosphorus and potassium associated ore. Background technique [0002] Phosphorus and potassium fertilizers, as the nutrient element fertilizers of crops, play an extremely important role in the life metabolism process of crops. However, in my country, the output and amount of phosphate fertilizer, potash fertilizer and their compound fertilizers are insufficient, and the ratio of nitrogen, phosphorus and potassium in the application of chemical fertilizers is seriously out of balance. The proportion of compound fertilizer with high phosphorus and potassium is too low. [0003] The extraction of potassium mainly comes from soluble potassium salt deposits, but it is seriously lacking in our country. According to statistics, in 2012 the world's water-soluble potassium salt reserves were equivalent to K 2 O ...

Claims

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Application Information

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IPC IPC(8): C05G1/00
CPCC05G1/00
Inventor 王存文马家玉覃远航吕仁亮汪铁林王为国陈苏芳冯魏良唐正姣张俊峰吴元欣
Owner WUHAN INSTITUTE OF TECHNOLOGY
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