Method for detecting content of soluble salt in slag aggregate of waste incinerator

A technology of waste incineration slag and detection method, which is applied in the field of detection of soluble salt content in waste incineration slag aggregates, can solve problems such as no test method for soluble salt content in aggregates, and achieve simple test equipment and sample The effect of small quantity and easy purchase

Inactive Publication Date: 2013-11-27
TONGJI UNIV
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current road industry standard "Test Regulations for Aggregate in Highway Engine

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 detecting content of soluble salt in slag aggregate of waste incinerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Sampling method for slag aggregates: multiple groups of slags uniformly distributed and roughly equal in quality are selected from the top, middle and bottom of the slag aggregate pile, and mixed uniformly to form a group of samples. Preparation of leachate from slag aggregates: Dry in an oven at 105°C for 8 hours, grind in a mortar, mix slag aggregates with different particle sizes and distilled water at a mass ratio of 1:5 and shake for 5 minutes to prepare multiple sets of suspensions, filter The obtained slag leachate was stored in a glass bottle with a stopper at room temperature and away from light.

[0017] Cl- content detection: take 100mL slag leaching solution respectively, and add 0.15mL 0.02mol / L sodium bicarbonate dropwise to it until the solution just turns yellow, add 0.25mL 50g / L potassium chromate indicator; add 0.04 mol / L silver nitrate, shake with the drops until the brick red precipitate no longer disappears; calculate the chloride content...

Embodiment 2

[0024] In order to further verify the effectiveness of the present invention, this embodiment tests slag leachate with different particle sizes, and the results are shown in Table 2. The smaller the particle size of the slag, the higher the concentration of chloride salt and sulfate, and the higher the electrical conductivity, indicating that the content of soluble salt in the fine particle size is higher. It can be seen that the detection method of the present invention can effectively distinguish the soluble salt content in slag with different particle sizes.

[0025] Table 2 Test results of various indicators of slag leachate with different particle sizes

[0026]

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 relates to the field of resource utilization of waste incinerator slag, in particular to a method for detecting the content of soluble salt in slag aggregate of a waste incinerator. The method comprises the following steps: (1) sampling: selecting a plurality of groups of uniformly distributed furnace slag with substantially the same mass at the top, in the middle and at the bottom of the furnace slag aggregate pile and uniformly mixing the selected furnace slag into a group of furnace slag aggregate; (2) preparing furnace slag leachate; drying, pulverizing in a mortar, mixing and oscillating furnace slag and distilled water at the mass ratio of 1:5 for 5-6 minutes to prepare slurry, and filtering; (3) titrating silver nitrate solution to determine the concentration of chloride(Cl<-1->) in the furnace slag leachate; (4) titrating barium chloride solution to determine the concentration of sulfate radical (SO4<2->); (5) utilizing the electric conductivity tested by a conductometer to determine the total amount of soluble salt in the furnace slag leachate. The method provided by the invention can accurately test the content of soluble salt in the slag aggregate of a waste incinerator, is simple, feasible, quick and accurate, is short in the test period, and can achieve batch detection of furnace slag aggregate to provide reference for resource utilization of furnace slag aggregate.

Description

technical field [0001] The invention relates to the field of resource utilization of waste incineration slag, in particular to a detection method for soluble salt content in waste incineration slag aggregate. Background technique [0002] Waste incineration slag belongs to general solid waste, because its physical and mechanical properties are similar to natural stone, and it can be used as recycled aggregate for resource utilization of road engineering materials. However, there is a huge difference between slag aggregates and natural stones, which is mainly reflected in the fact that the solubility of slag aggregates is much greater than that of natural stones, which is mainly due to the water-soluble salt content in slag aggregates (specifically chlorine, sulfuric acid, etc. Roots, hydroxides, carbonates and bicarbonates, etc.) are high, and the test shows that the soluble salt content is 1-2%. Existing studies have shown that too high a soluble salt content, on the one h...

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): G01N1/04G01N1/28G01N5/04G01N21/77G01N27/06
Inventor 李立寒刘栋崔华杰
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap