Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Blast furnace slag treatment method and device capable of directly obtaining high-temperature dried slag

A technology of a treatment device and a treatment method, applied in the direction of recycling technology, etc., can solve the problems of difficult purification of industrial wastewater, white pollution of the environment, waste of water resources, etc., and achieve the effects of improving energy utilization, reducing pollution, and reducing water consumption.

Inactive Publication Date: 2017-06-30
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional treatment process, the liquid slag is extracted by water and broken into particles of about 4mm. The final treated slag has a high water content and needs to be treated in a sedimentation tank before being sent to the cement plant as a raw material for cement. This process wastes a lot Each ton of slag needs about 6 tons of circulating water. The industrial wastewater formed is difficult to purify, and the steam generated is difficult to collect. After being released, it will cause white pollution to the environment and easily corrode the surrounding buildings.

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
  • Blast furnace slag treatment method and device capable of directly obtaining high-temperature dried slag
  • Blast furnace slag treatment method and device capable of directly obtaining high-temperature dried slag
  • Blast furnace slag treatment method and device capable of directly obtaining high-temperature dried slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In order to further understand the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] A method for treating blast furnace slag that can directly obtain high-temperature dry slag provided by the present invention is as follows: liquid blast furnace slag flows into the upper water slag tank 1, and the liquid blast furnace slag is washed and cooled by water sprayed from high-pressure water nozzles. Due to thermal stress, the slag is The slag-water mixture 3 is broken into small particles of about 4 mm, and the slag-water mixture 3 flows down along the upper slag tank 1 by gravity; during the flow, the granulated blast furnace slag in the slag-water mixture 3 exchanges heat with water, After the temperature drops to 400-800°C, it falls on the special mesh conveyor belt 4, and the end of the upper water slag tank 1 is equipped with a terminal slag retaining net 6 to ensure that the...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a blast furnace slag treatment method and device capable of directly obtaining high-temperature dried slag and belongs to the technical field of blast furnace slag treatment in steel-metallurgy industries. The blast furnace slag treatment device comprises an upper water slag groove, a high-pressure water spray head, a special net-type conveyor belt, a lower hot water collecting groove and an end slag-blocking net; liquid blast furnace slag flows into the upper water slag groove and is cooled by water sprayed by a high-pressure water nozzle, and the liquid blast furnace slag is broken into a small-granular slag-water mixture after water quenching, cooling and breaking, and the slag-water mixture flows downwards along the upper water slag groove by aid of gravity; after the temperature of granulated blast furnace slag is lowered to be 400-800 DEG C, the granulated blast furnace slag falls into the special net-type conveyor belt to quickly achieve slag-water separation, after water falls into the lower hot water collecting groove, the water is continuously used through a circulating system, and after separation, water on the surface of slag is heated and then evaporates, so that the high-temperature dried slag of 300-700 DEG C is formed; and the high-temperature dried slag is finally sent to a waste heat boiler to be subjected to waste heat using. According to the blast furnace slag treatment method and device capable of directly obtaining the high-temperature dried slag, the waste heat using rate of blast furnace slag treatment can be greatly improved, the product quality of solid slag is improved, and energy conservation and emission reduction of the steel-metallurgy industries are facilitated.

Description

[0001] Technical field: [0002] The invention belongs to the field of blast furnace slag processing equipment in the iron and steel metallurgy industry, and in particular relates to a blast furnace slag processing method and device capable of directly obtaining high-temperature dry slag. [0003] Background technique: [0004] In iron and steel production, the utilization rate of slag is relatively low, which is far away from the goal of "zero" solid waste discharge in iron and steel enterprises, and in the process of slag treatment, the energy consumption is high. The consumption of reclaimed water is particularly large, and there will be a large amount of steam released. The steam contains hydrogen sulfide, sulfur dioxide, etc., which also pollutes the surrounding environment. At the same time, the heat of the slag cannot be effectively used. [0005] For a long time, many researchers have studied this problem, and designed slag forming methods such as drum slagging, rotary ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/08C21B3/06
CPCC21B3/06C21B3/08Y02W30/50
Inventor 王小林陈光包向军王恒达李显宝陈谞
Owner ANHUI UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products