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A method and production system for graded preparation of powdered ammonium and high-quality ammonium phosphate from phosphate rock

A high-quality, ammonium phosphate technology, applied in chemical instruments and methods, phosphate, solid separation, etc., can solve the problems of large price gap, unstable quality, large purchase of phosphate rock, etc., and achieve the goal of stable quality and improved quality Effect

Active Publication Date: 2022-06-21
HUBEI XIANGYUN GROUP CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large amount of phosphate rock purchased, the quality is unstable, depending on the classified stacking and ore blending of phosphate rock, the quality of phosphate rock is unstable, which will lead to very unstable quality of the produced products, such as low phosphorus content and The magnesium content is high, and it can only be used as agricultural ammonium in the future, and the price gap is very large

Method used

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  • A method and production system for graded preparation of powdered ammonium and high-quality ammonium phosphate from phosphate rock
  • A method and production system for graded preparation of powdered ammonium and high-quality ammonium phosphate from phosphate rock
  • A method and production system for graded preparation of powdered ammonium and high-quality ammonium phosphate from phosphate rock

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Embodiment 1

[0033] see Figure 1-3 , Embodiment 1 provides a kind of method for preparing powder ammonium and high-quality ammonium phosphate by classification of phosphate rock, the method comprises the following steps:

[0034] (1) Phosphate slurry with a density of 1.25-1.30 g / ml and a fineness of 100 mesh ≥ 90% is obtained by the ball mill 3, the slurry tank 4 and the primary cyclone 5. The taper at the bottom of the primary cyclone 5 is 30-45°.

[0035] (2) send the phosphate ore pulp obtained in step (1) to the secondary cyclone 1 for processing to obtain low-grade ore pulp (overflow, density is about 1.15 g / ml, P 2 O 5 The content of ore is less than 26.5%, the content of MgO is more than 3%) and high-grade pulp (sediment, density 1.65-1.70 g / ml, P 2 O 5 The content of MgO is more than 28.5%, the content of MgO is less than 4%), the processing pressure is 0.08-0.12MPa, and the taper of the bottom of the secondary cyclone 1 is 18-25°. The quality of the low-grade pulp usually o...

Embodiment 2

[0054] see Figure 1-3 , embodiment 2 provides a kind of phosphate rock classification to prepare the production system of powder ammonium and high-quality ammonium phosphate, and this system comprises:

[0055] The ore pulp preparation device is used to obtain phosphate ore pulp with a density of 1.25-1.30g / ml and a fineness of 100 mesh ≥90%. It is similar to the conventional structure, except that the indicators of the ore pulp need to be adjusted to suit the secondary cyclone 1.

[0056] The secondary cyclone 1 is used to classify the pulp output from the pulp preparation device to obtain high-grade pulp and low-grade pulp respectively, and the taper of the bottom is 18-25°. The secondary cyclone 1 is different from the primary cyclone 5, and the effect of grade separation can only be achieved under specific structure and feeding conditions. Specifically, the model of the secondary cyclone 1 in this embodiment is a FX250-GX×18 double-feed cyclone group, with 8 units runnin...

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Abstract

The invention discloses a method and a production system for graded preparation of powdered ammonium and high-quality ammonium phosphate from phosphate rock, belonging to the technical field of ammonium phosphate production. The method includes: (1) obtaining phosphate rock slurry with a density of 1.25-1.30g / ml and a fineness of 100 mesh ≥ 90% through the treatment of the primary cyclone (5), and the taper at the bottom of the primary cyclone is 30-45° (2) send the phosphate rock slurry that step (1) obtains to the secondary cyclone to process and obtain low-grade ore pulp and high-grade ore pulp respectively, the pressure is 0.08-0.12MPa, and the taper at the bottom of the secondary cyclone is 18-25 °; (3) send the high-grade ore pulp that step (2) obtains to carry out magnesium removal treatment in the demagnesization device, be used for preparing high-quality ammonium phosphate after the demagnesization treatment; (4) low-grade ore pulp that step (2) obtains Send it to the thickening tank to increase the density of the pulp to 1.60-1.70g / ml, and the thickened pulp is used to prepare ammonium powder.

Description

technical field [0001] The invention belongs to the technical field of ammonium phosphate production, and particularly relates to a method and a production system for preparing powder ammonium and high-quality ammonium phosphate by grading phosphate rock. Background technique [0002] Phosphorus is an essential element for crops. With the development of science and technology, the use of phosphorus is also expanding. Phosphate resource is an important basic raw material for the development of phosphorus chemical industry. The main mineral components of phosphate rock are collophosphate and microcrystalline apatite, and the secondary minerals are quartz, dolomite, calcite and feldspar debris, and carbon mud. and a small amount of sea greenstone, etc. Phosphate rock is mainly used to make phosphoric acid, which plays a great role in the development of the national economy as the final chemical product or intermediate product of other phosphorus chemical products. It is main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/00B03B7/00B04C7/00C01B25/28
CPCB03B9/00B03B7/00B04C7/00C01B25/28
Inventor 董寿春程来斌查炎华苏云梦
Owner HUBEI XIANGYUN GROUP CHEM