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Method for preparing sintered ore by utilizing municipal solid waste incineration fly ash

A technology for municipal solid waste and fly ash incineration, applied in chemical instruments and methods, improvement of process efficiency, removal of solid waste, etc., can solve the problems of land occupation, environmental pollution, etc., and achieve the effect of improving low-temperature pulverization performance

Inactive Publication Date: 2016-10-12
宝武集团环境资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method utilizes the good kinetic conditions of the pyrometallurgical reactor and the modern environmental protection equipment and technology of the iron and steel enterprises to realize resource utilization and harmless treatment of urban waste incineration fly ash, and solve the land occupation and related problems caused by its stacking. Environmental pollution problems, thereby reducing the environmental load of the city

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a method for preparing sintered ore by using municipal solid waste incineration fly ash, which specifically includes the following steps:

[0030] 1. Mixed material: mix the material with 10% of fly ash, 20% of adhesive and 70% of water according to the percentage by weight, and maintain at room temperature for 20 hours to obtain the mixed material;

[0031] 2. Sintering material: 70% of iron ore powder, 3% of quicklime, 1% of limestone, 2% of calcined dolomite, 5% of coal powder, 13% of returned ore, 1% of rolled steel skin and the mixture prepared in step 1 5% mixed together to obtain sintered material;

[0032] 3. Sintering: Spread the sintered material in step 2 on the trolley of the sintering machine for sintering, and test various performance indicators of the sintered ore. Among them, the thickness of the paving material layer is 700mm, and the sintering ignition temperature is 1100°C.

[0033] The sintering test shows that compared wit...

Embodiment 2

[0035] 1. Mixed material: Mix the material according to the percentage by weight of 20% water, 20% fly ash, and 60% binder, and maintain it at room temperature for 24 hours to obtain the mixed material;

[0036] 2. Sintering material: 50% of iron ore powder, 20% of converter dust, 3% of quicklime, 1% of limestone, 2% of calcined dolomite, 5% of coal powder, 13% of returned ore, 1% of rolled steel skin and step 1 5% of the mixed material prepared in the mixture is mixed together to obtain a sintered material;

[0037] 3. Sintering: Spread the sintered material in step 2 on the trolley of the sintering machine for sintering, and test various performance indicators of the sintered ore. Among them, the thickness of the paving material layer is 700mm, and the sintering ignition temperature is 1100°C.

[0038] The sintering test shows that compared with the sinter without waste incineration fly ash, the sinter drum strength index increases by 0.1 percentage points, the finished pro...

Embodiment 3

[0040] 1. Mixed material: The weight ratio of the material according to the weight percentage is: 20% of water, 20% of fly ash, and 60% of binder are mixed, and maintained at room temperature for 24 hours to obtain the mixed material;

[0041] 2. Sintering material: 50% iron ore powder, 10% converter dust, 10% sulfuric acid slag, 3% quicklime, 1% limestone, 2% calcined dolomite, 5% coal powder, 13% returned ore, and 1% rolled steel skin % and mixed together with 5% of the mixture prepared in step 1 to obtain sintered material;

[0042] 3. Sintering: Spread the sintered material in step 2 on the trolley of the sintering machine for sintering, and test various performance indicators of the sintered ore. Among them, the thickness of the paving material layer is 700mm, and the sintering ignition temperature is 1100°C.

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Abstract

The invention provides a method for preparing sintered ore by utilizing municipal solid waste incineration fly ash. The method comprises the following steps of uniformly mixing the fly ash, water and an auxiliary material to obtain a mixture; mixing the mixture, iron ore powder, a solvent, fuel, returning ore and water to obtain a sintered material; sintering the sintered material at the ignition temperature of 1,000 to 1,100 DEG C to obtain the sintered ore, wherein the auxiliary material comprises at least one of blast furnace gas ash, bof dust sludge and sulfate slag. Compared with the prior art, the method for preparing the sintered ore by utilizing the municipal solid waste incineration fly ash has the following beneficial effects that (1) valuable components such as CaO, Fe2O3, MgO and Al2O3 in the fly ash can be effectively utilized, and the components and the performance of the sintered ore are adjusted by utilizing the fly ash; (2) chloride in the fly ash can be effectively utilized, and the low-temperature pulverization property of the domestic sintered ore is improved by adding CaCl2 usually.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment and metallurgical engineering, and in particular relates to a method for utilizing sintered ore for harmless treatment of fly ash from incineration of municipal solid waste in large quantities. Background technique [0002] With the improvement of the living standard of our country's residents, the discharge of urban waste is increasing year by year with a growth rate of more than 10%. At present, my country has become one of the most polluting countries in the world in terms of waste stockpiles. The cumulative stockpiles of urban domestic waste have reached 8 billion tons. The rapid growth of urban waste has become one of the problems that plague China's future sustainable development. As one of the efficient treatment methods of urban waste, incineration has become a widely used urban waste treatment technology in developed countries due to its advantages of harmlessness and si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16B09B3/00B09B5/00
CPCC22B1/16B09B3/00B09B5/00B09B2101/30Y02P10/20
Inventor 杨敏魏恒封羽涛刘百臣贾谊童敏闵义史培阳姜茂发
Owner 宝武集团环境资源科技有限公司
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