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Rare earth additive, rare earth superphosphate and preparing method thereof

A technology of rare earth additives and calcium superphosphate, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of high production costs, complicated production process of rare earth additives, radioactive pollution, etc., and achieve the effect of high utilization rate

Inactive Publication Date: 2007-09-12
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain defects in the production and effect of this phosphate fertilizer.
First of all, the production process of rare earth additives in the production process is relatively complicated
It involves multiple steps for a superphosphate production enterprise or other enterprises to produce rare earth additives from rare earth concentrates, and the production cost is relatively high
Secondly, if there is a problem with the removal of the radioactive element thorium and the whereabouts of thorium, it will cause radioactive pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Example 1: the preparation of 1000g rare earth additive: add in the mixer fully mix with 250g europium chloride (45% REO), 10g citric acid monohydrate, 440g dolomite powder, 200g zeolite powder, 50g bitter earth powder, 50g bentonite, 1kg of rare earth additives can be obtained, wherein the particle size of the rare earth chloride is ≥8 mesh, and the particle size of other components are all ≥80 mesh.

example 2

[0022] Example 2: The preparation of 20kg rare earth additive: add in the mixer fully mix with 6kg (60% REO) rare earth carbonate, 1kg citric acid monohydrate, 6kg dolomite powder, 5kg zeolite powder, 1kg bitter earth powder, 1kg bentonite, namely 20kg of rare earth additives can be produced. The particle size of the rare earth and other components are all ≥80 mesh.

example 3

[0023] Example 3: The preparation of 500g rare earth additive: add in the mixer fully mix with 75g (32%REO) rare earth citrate, 25g zinc citrate, 250g dolomite powder, 100g zeolite powder, 25g bitter earth powder, 25g bentonite, namely 500g of rare earth additives can be prepared, wherein the particle size of rare earth citrate is ≥ 8 mesh, and the particle size of other components are all ≥ 80 mesh.

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Abstract

This invention relates to a rare earth additive, rare earth acid phosphate containing said additive and its preparation method, in which, the main composition of said additive is rare earth, dolomite powder, zeolite powder, citric acid or citrate, the secondary composition includes magnesia powder and bentonite, the preparation method includes: putting the compositions into a mill in weight proportion and mixing them uniformly, and the preparation method of rare earth acid phosphate includes: adding a rare earth additive into phosphorite powder uniformly in proportion in the process of ball-milling phosphorite stones or pulping powder then to be reacted, solidified and aged in a formation chamber to generate rare earth acid phosphate.

Description

technical field [0001] The invention belongs to the field of fertilizers. technical background [0002] Phosphate fertilizer is one of the three major chemical fertilizers. Since the 1950s, in just over 50 years, my country's phosphate fertilizer industry has experienced a development process from scratch, from small to large. It has successively developed high-concentration phosphorus compound fertilizers such as calcium magnesium phosphate fertilizer, heavy calcium, ammonium phosphate, nitrogen, phosphorus and potassium, and nitrophosphate fertilizer. The production process of phosphate fertilizer has been mature. Among the varieties of phosphate fertilizers, except for ammonium phosphate fertilizers, most of them are calcium phosphate fertilizers, such as ordinary calcium superphosphate, double superphosphate and calcium magnesium phosphate fertilizers. For superphosphate and heavy calcium, due to the high content of free acid, the water solubility of phosphorus is also...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05D9/02
Inventor 王甲辰杨军刘向生樊玉斌伍艳平张赫赵凤红韩学伟
Owner GRIREM ADVANCED MATERIALS CO LTD