Sintering flue gas desulphurization residue processing method

A technology for sintering flue gas and treatment method, applied in cement production and other directions, can solve the problems of low investment and production cost of production line, difficulty in comprehensive treatment and resource utilization, etc., to improve resource utilization rate, low production cost and stable composition Effect

Inactive Publication Date: 2019-11-01
GUANGDONG HUAXIN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an application and treatment method for sintered flue gas desulfurization slag to solve the problem of comprehensive treatment and resource utilization of sintered flue gas desulfurization slag. The raw materials used in cement plants have the characteristics of stable composition, low investment in production lines, and low production costs.

Method used

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  • Sintering flue gas desulphurization residue processing method
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  • Sintering flue gas desulphurization residue processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] See figure 1 , a method for processing sintered flue gas desulfurization slag, comprising:

[0028] Select raw materials, and use weighing equipment to select appropriate amounts of sintering desulfurization slag, steelmaking LT ash, steelmaking OG mud and converter secondary ash according to the proportion. Each raw material has a different chemical composition, specifically;

[0029]

[0030] The selected raw materials are put into the silo with the feeding port through the feeding machine respectively. There is a weight valve at the bottom of the feeding port. The weight valve opens the feeding port according to the proportion, and the raw materials fall into the conveyor belt according to the proportion; The selected sintering desulfurization slag, steelmaking LT ash, steelmaking OG mud and converter secondary ash are sent to the mixer with transportation equipment to fully mix the finished product. The mixing time of various raw materials in the mixer is 2 to 3 ...

Embodiment 2

[0033] See figure 2 , a test method for using sintered flue gas desulfurization slag as raw material for correcting cement iron quality;

[0034] Step 1: Detect and analyze the chemical composition of sintering flue gas desulfurization slag and steelmaking LT ash, steelmaking OG mud and converter secondary ash produced in the process of iron and steel smelting;

[0035] Step 2: drying steelmaking OG mud and sintering flue gas desulfurization slag;

[0036] Step 3: Weigh the following raw materials: 100kg of sintering flue gas desulfurization slag, 100kg of steelmaking LT ash, 200kg of steelmaking OG mud, and 50kg of converter secondary ash;

[0037] Step 4: Add the above four materials and a certain proportion of water into a small powerful mixer and mix;

[0038] Step 5: Conduct component analysis and leaching toxicity test on the mixture;

[0039] Step 6: After testing, Fe in the mixture 2 o 3 The content is 63.24%, SO 3 The content is 1.40%, and the moisture content ...

Embodiment 3

[0042] See image 3 , a method for using sintered flue gas desulfurization slag as raw material for correcting iron quality of cement;

[0043] Step 1: drying steelmaking OG mud and sintering flue gas desulfurization slag through a hot blast stove;

[0044] Step 2: Pour the sintering flue gas desulfurization slag and steelmaking LT ash, steelmaking OG mud and converter secondary ash produced in the process of iron and steel smelting into four feed bins with feeding ports;

[0045]Step 3: Controlled by the weighing belt, feed materials according to the following mass percentages: sintering flue gas desulfurization slag 20-25%, steelmaking LT ash 20-25%, steelmaking OG mud 40-45%, converter secondary ash 10% ~15%;

[0046] Step 4: Add various raw materials into the plow mixer mixer in turn for full mixing, and add a certain proportion of water during the mixing process;

[0047] Step 5: Transport the mixed material to the finished product silo through the belt;

[0048] Step...

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Abstract

The invention relates to a sintering flue gas desulphurization residue processing method. According to the sintering flue gas desulphurization residue processing method, sintering flue gas desulphurization residue is taken as a cement ferruginous adjusting agent. The adjusting agent suitable to be used in cement plants is produced through raw material ratio selection and processing. The componentsare stable; production line investment cost is low; and production cost is low.

Description

technical field [0001] The invention relates to utilization of smelting waste, in particular to a treatment method for sintering flue gas desulfurization slag. Background technique [0002] Iron and steel enterprises will produce a large amount of dust and sludge containing impurities during the smelting process. Among them, the desulfurization slag produced during the desulfurization process of sintering flue gas contains high heavy metals and S elements, so it cannot be directly returned to sintering for production and utilization, and no effective method has been found so far. Most of the disposal routes are stockpiled in the factory, which not only occupies land resources but also brings certain risks to the environment. Therefore, the comprehensive treatment and resource utilization of sintering flue gas desulfurization slag is an urgent problem to be solved in the industry. [0003] At present, only Fe is specified in the quality standard of cement iron raw materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24
CPCC04B7/24Y02P40/10
Inventor 付志群彭亚环韦政石建红王君张兵成林汉才陈伟权张胜祥陈惠容尹洁
Owner GUANGDONG HUAXIN ENVIRONMENTAL PROTECTION TECH CO LTD
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