Method for preparing solid-state calcium magnesium titanium iron sulfur nitrogen silicon composite fertilizer by using water to quench titanium-containing blast furnace slag

A technology of calcium magnesium titanium iron and blast furnace slag, which is applied in the direction of nitrogen fertilizer, application, ammonium salt fertilizer, etc., can solve pollution and other problems, and achieve the effect of simple process, stable fertilizer properties and wide source of raw materials

Inactive Publication Date: 2008-09-17
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: the present invention provides a method for preparing plant fertilizers from water-quenched titanium-containing blast furnace slag, the purpose of which is to prepare plant fertilizers from a large amount of discharged water-quenched titanium-containing blast furnace slag and other raw materials to solve environmental pollution problems and make full use of Titanium resources and the purpose of meeting the needs of plants for a variety of nutrient elements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Example 1: Water-quenched titanium-containing blast furnace slag (titanium dioxide content accounts for 16%) was crushed and ground to obtain a powder with a diameter of 80 microns, mixed evenly with 4-6 times ammonium sulfate, heated to 300 ° C in an air atmosphere and kept for 20 minutes to obtain Large pieces of frit are crushed to obtain small pieces with a diameter of 4 to 12 mm, which is a kind of plant fertilizer.

example 2

[0017] Example 2: Water-quenched titanium-containing blast furnace slag (titanium dioxide content accounts for 19%) was crushed and ground to obtain a powder with a diameter of 70 microns, mixed evenly with 12-14 times ammonium pyrosulfate, heated to 240 ° C in an air atmosphere and kept for 40 minutes, Obtain large pieces of frit, and after crushing, obtain small pieces with a diameter of 4 to 12 mm, which is a kind of plant fertilizer.

example 3

[0018] Example 3: crush and grind water-quenched titanium-containing blast furnace slag (titanium dioxide content accounts for 25%) to obtain a powder with a diameter of 110 microns, mix it with 16-18 times ammonium bisulfate, heat up to 420°C in an air atmosphere and keep it warm for 50 minutes, Obtain large pieces of frit, and obtain small pieces with a diameter of 8 mm after crushing, which is a kind of plant fertilizer.

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Abstract

The invention belongs to a method for producing plant fertilizers, more particularly to a method for producing a solid-state Ca/Mg/Ti/Fe/S/N/Si compound fertilizer from water-quenched blast furnace slag. The invention is characterized in that: the raw materials include titanium oxide-containing water-quenched blast furnace slag, ammonium sulfate, ammonium hydrogen sulfate, ammonium pyrosulfate and ammonium persulfate; the method comprises the following steps: ball-milling Ti-containing water-quenched blast furnace slag to obtain powder of particle size of 60-160 micrometers, mixing the furnace slag powder with 3-20 times of one substance selected from ammonium sulfate, ammonium hydrogen sulfate, ammonium pyrosulfate, ammonium persulfate, or a mixture thereof, heating the resulting mixture up to 200-500 DEG C and maintaining the temperature for 10-65 min, and crushing clinkers to small pieces of 4-12 mm diameter. The invention utilizes Ti-containing water-quenched blast furnace slag and other raw materials to produce plant fertilizers, and thereby realizes environmental protection, Ti resource utilization and nutrient supplementation to plants.

Description

Technical field: [0001] The invention belongs to a method for preparing plant fertilizer, in particular to a method for preparing solid calcium-magnesium-titanium-iron-sulfur-nitrogen-silicon compound fertilizer by quenching blast furnace slag with water. Background technique: [0002] Since the discharge of water-quenched titanium-containing blast furnace slag has caused the loss of a large amount of titanium resources and polluted the environment, its utilization has become the focus of attention. Water-quenched titanium-containing blast furnace slag cannot be directly used in cement production, thus limiting its use. Panzhihua Iron and Steel Research Institute cooperated with Central South University of Technology to develop a new process for preparing artificial rutile and sulfuric acid method for preparing titanium dioxide, and produced rutile TiO with a grade greater than 98%. 2 As well as electrode grade, ceramic grade, pigment grade and other grades of titanium diox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05C3/00C05D9/02
Inventor 薛向欣张悦杨合段培宁
Owner NORTHEASTERN UNIV
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