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Method and device for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer

A water-insoluble potassium chloride technology, applied in fertilization equipment, potassium fertilizer, alkali metal chloride, etc., can solve the problems of staying in the laboratory stage, etc., and achieve the effect of low production cost, high potassium extraction rate, and simple process flow

Active Publication Date: 2013-09-11
TIANJIN CEMENT IND DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But all of these studies are only at the laboratory stage, and there is still a certain distance from industrial production.

Method used

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  • Method and device for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer
  • Method and device for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer
  • Method and device for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer

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Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0035] 1) Selection of raw materials

[0036] Potassium aluminosilicate minerals having the chemical composition shown in Table 1 were used.

[0037] Chemical composition (%) of table 1 raw material

[0038]

LOSS

SiO 2

Al 2 o 3

Fe 2 o 3

CaO

MgO

K 2 o

Na 2 o

Cl

potash ore

3.89

56.88

16.62

7.51

0.14

2.10

9.47

0.18

0.008

rock salt

N / A

0.21

0.14

0

0.04

0.06

0.04

48.00

52.625

limestone

43.02

1.70

0.20

0.10

54.28

0.32

0.04

0.04

0.009

[0039] 2) Preparation of raw meal

[0040] Separately crush potassium ore, halite and limestone, press certain (K + : Cl - : Ca 2+ ) The ratio of the amount of substances is compounded to obtain raw meal, and the raw meal is ground to 80μm sieve with 10-40% remaining by using a vertical mill.

[0041] 3) Roasting of raw materials

[0042] Feed the raw ...

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Abstract

The invention discloses a method for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer. The method comprises the following steps of: 1) respectively crushing chloride and calcium raw materials used as accessory ingredients of the water insoluble potassium ore, and distributing the materials to obtain a raw material; 2) grinding the obtained raw material until the residue on sieve of a square hole sieve of 80 microns is 10-40%; 3) conveying the obtained raw material into a rotary kiln for roasting, wherein the temperature of a burning zone is 750-1000 DEG C, and the standing time of the material in the kiln is 40-80 minutes; 4) cooling a roasted product; 5) dissolving and soaking the cooled roasted product in water, performing evaporating and crystallization separating on the solution to obtain a potassium chloride product with purity larger than 95%. The invention further discloses a device adopting the method. The method disclosed by the invention is simple in technological process, low in energy consumption and low in production cost.

Description

technical field [0001] The invention relates to a method and a device for producing potassium fertilizer by utilizing water-insoluble potassium ore, in particular to a method and a device for producing potassium fertilizer by roasting water-insoluble potassium ore and extracting potassium chloride. Background technique [0002] my country's potash fertilizer dependence on foreign countries has reached more than 60%, which has endangered my country's food security. my country's soluble potassium ore resources are extremely short, with reserves of 457 million tons, accounting for only 2.6% of the world's reserves; however, water-insoluble potassium ore resources are very rich, with a total reserve of more than 10 billion tons. Accelerating the research on the extraction technology of potassium in potassium-bearing rocks and developing and utilizing water-insoluble potassium ore to produce potassium fertilizers are of great significance for improving the self-sufficiency rate o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/04C05D1/02
CPCY02P10/20
Inventor 彭学平俞为民翟怀君李小燕朱金波陈昌华白波刘继开武晓萍马娇媚郭涛
Owner TIANJIN CEMENT IND DESIGN & RES INST
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