Supercharge Your Innovation With Domain-Expert AI Agents!

Method for producing weakly acidic liquid fertilizer by converter steel slag

A technology of converter steel slag and liquid fertilizer, applied in the direction of liquid fertilizer, fertilizer mixture, etc., to achieve the effect of abundant phosphorus resources, promoting the dissolution of phosphorus, and alleviating the dependence of phosphorus

Inactive Publication Date: 2019-01-11
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem of reducing the content of insoluble phosphorus in the soil and improving the utilization efficiency of phosphorus, the present invention provides a method for producing weakly acidic liquid fertilizer by using converter steel slag. The converter steel slag is modified by biomass ash slag, and the 2CaO in the steel slag is promoted. SiO 2 -2CaO·K 2 O·P 2 o 5 and 2CaO·SiO 2 -2CaO·P 2 o 5 Formation of solid solution, and increase its content, using malic acid-HNO 3 The mixed solution dissolves the phosphorus in the modified steel slag, and filters to obtain a phosphorus-containing filtrate. By adding ammonia solution to the phosphorus-containing filtrate, the acidity and alkalinity of the filtrate are adjusted to obtain a liquid fertilizer.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing weakly acidic liquid fertilizer by converter steel slag
  • Method for producing weakly acidic liquid fertilizer by converter steel slag
  • Method for producing weakly acidic liquid fertilizer by converter steel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Select the steel slag produced by the converter duplex process of producing H-shaped steel in a steel factory. A method for producing weakly acidic liquid fertilizer using converter steel slag in this embodiment, its flow chart is as follows figure 1 As shown, it specifically includes the following steps:

[0042] (1) Add rice ash below 2mm to the molten steel slag during slag removal, and the ash amount is 30mass%;

[0043] (2) insulation reaction at 1823K for 90min;

[0044] (3) Control the cooling rate to be 3K / min, and slowly drop to room temperature;

[0045] (4) crushing, grinding and screening the cooled modified steel slag to obtain a slag sample particle size of 75-150 μm;

[0046] (5) Preparation of malic acid-HNO with a pH value of 5 3 Add 400mL of the mixed solution into the beaker, and control the acidity and alkalinity of the solution through the SC-200A pH automatic control liquid addition system;

[0047] (6) Get 1g of steel slag screened in step (4)...

Embodiment 2

[0052] Select the steel slag produced by the converter duplex process of producing automobile plates in a steel factory. A method of producing weakly acidic liquid fertilizer using converter steel slag in this embodiment specifically includes the following steps:

[0053] (1) Add rice ash slag below 2mm to molten steel slag during slag removal, and the ash slag amount is 20mass%;

[0054] (2) insulation reaction at 1823K for 60 minutes;

[0055] (3) Control the cooling rate to be 4K / min, and slowly drop to room temperature;

[0056] (4) The particle size of the slag sample obtained by crushing, grinding and screening the cooled modified steel slag is 45-48 μm;

[0057] (5) Preparation of malic acid-HNO with a pH value of 5.5 3 Add 500mL of the mixed solution into the beaker, and control the acidity and alkalinity of the solution through the SC-200A pH automatic control liquid addition system;

[0058] (6) Get 1g of steel slag screened in step (4) and put it into the malic a...

Embodiment 3

[0063] Select the steel slag produced by the converter double slag process of producing pipeline steel in a steel factory. A method of using converter steel slag to produce weakly acidic liquid fertilizer in this embodiment specifically includes the following steps:

[0064] (1) Add rice ash slag below 2mm to molten steel slag during slag removal, and the ash slag amount is 20mass%;

[0065] (2) insulation reaction at 1783K for 80min;

[0066] (3) Control the cooling rate to be 3K / min, and slowly drop to room temperature;

[0067](4) The particle size of the slag sample obtained by crushing, grinding and screening the cooled modified steel slag is 45-48 μm;

[0068] (5) Preparation of malic acid-HNO with a pH value of 6 3 Add 400mL of the mixed solution into the beaker, and control the acidity and alkalinity of the solution through the SC-200A pH automatic control liquid addition system;

[0069] (6) Get 1g of steel slag screened in step (4) and put it into the malic acid-H...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for producing weakly acidic liquid fertilizer by converter steel slag and belongs to the field of fertilizer production. The method comprises: modifying molten converter steel slag with biomass ash, then crushing and grinding the modified converter steel slag, adding the fine converter steel slag into a malic acid-HNO3 mixed solution, carrying out stirring so thatcalcium, silicon and phosphorus in the converter steel slag are dissolved, adding an aqueous ammonia solution into the filtrate, and adjusting pH and ingredients of the filtrate to obtain the liquid fertilizer containing nitrogen, potassium, magnesium, calcium, silicon and iron. The method fully utilizes metallurgical industry waste residues and biomass ash slag produced by the power industry, cantreat wastes through wastes, and utilizes a mixed solution of an organic acid and an inorganic acid to extract valuable elements in the waste residues so that the liquid fertilizer for agricultural production is obtained. The phosphorus-free tailings can be returned to smelting and recycling so that the efficient recycling of industrial solid wastes and high value-added utilization of resources are realized.

Description

technical field [0001] The invention belongs to the field of liquid fertilizer production, and in particular relates to a method for producing weakly acidic liquid fertilizer by using converter steel slag. Background technique [0002] As we all know, phosphorus is one of the indispensable important elements for the growth of crops. At present, about 43% of the 1.319 billion hectares of cultivated land in the world are deficient in phosphorus, and about 2 / 3 of the 170 million hectares of farmland in my country are severely deficient in phosphorus. In addition, phosphorus is a non-renewable mineral resource. According to the proven phosphate rock reserves and mining speed, the world's existing phosphate rock resources can only last for 50 to 400 years. Phosphorus is still the largest agricultural production in my country and the world. The main limiting factor, the supply and demand of phosphate fertilizer is not only one of the outstanding contradictions of agricultural produ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C05B17/00
CPCC05B17/00C05G5/20
Inventor 吕宁宁杨金星苏畅季鹏桂德培孔辉王海川
Owner ANHUI UNIVERSITY OF TECHNOLOGY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com