Resource utilization method of household garbage incineration residue sorting tailing

Abstract

The invention relates to a resource utilization method of household garbage incineration residue sorting tailing. The household garbage incineration residue sorting tailing is subjected to fine grinding treatment and is directly dried by utilizing hot smoke, the obtained residue micro powder is forcedly mixed with cement, and processes such as pulping, bubble forming, mixing and soaking, casting moulding, low-temperature oxygen steaming, normal-temperature maintenance and the like are carried out, so that a foam concrete block or a thermal insulation material is prepared. The resource utilization method of the household garbage incineration residue sorting tailing has the advantages that negative effect of free calcium oxide and magnesium oxide on quality of foam concrete is eliminated, and final strength of a foam concrete product is improved; under the combined action of hydration products of cement, and toxic trace heavy metals are solidified, so that a tailing product produces no secondary pollution to the environment; and residue adding proportion is high, resource utilization and large-scale treatment on the garbage incineration residue sorting tailing can be realized, technology is simple, product cost is low, and good economic benefit and environmental benefit are realized.

Description

technical field

[0001] The invention relates to the field of comprehensive utilization of solid waste resources, in particular to a method for resource utilization of domestic waste incineration slag sorting tailings. Background technique

[0002] Domestic waste incineration power generation has been widely used in my country. Its advantages are: after incineration, the volume of waste can be reduced by more than 70%, which can solve the problems of high land cost of landfill and inability to meet the landfill capacity requirements. The high-temperature gas produced by waste incineration Energy can be recovered and reused. Incineration slag is a by-product of the waste incineration process, mainly including residues on the grate and particles falling from between the grates, and its output accounts for about 20%-30% of the mass of the original garbage. Since garbage is the end point of metal substances in social life, the fine-grained slag is regarded as the raw material for...

Examples

Embodiment 1

[0048] Prepare foam concrete blocks as follows:

[0049] 1) Fine grinding: Grinding the remaining tailings after sorting out iron, aluminum, copper, zinc, gold, silver and other metals from the waste incineration plant slag, the particle size is 700cm in specific surface area 2 / g; The finely ground tailings powder is directly dried with hot flue gas to obtain sorted tailings micropowder with a moisture content of 1% and free CaO and MgO contents <1%.

[0050] 2) Mixture preparation: dry-mix the fine powder of sorted tailings with cement and early strength agent in proportion, and the mixing time is 10 minutes. Ordinary Portland cement is used for cement; the ratio of sorted tailings micropowder:cement is 3:7; the early strength agent is sodium silicate and triethanolamine compounded at 1:1, and the addition ratio is cement and sorted tailings micropowder dry basis 1% of the total amount.

[0051] 3) Foam preparation: Dilute the foaming agent 50 times with water and stir sli...

Embodiment 2

[0058] Prepare foam concrete blocks as follows:

[0059] 1) Fine grinding: Grinding the remaining tailings after sorting out iron, aluminum, copper, zinc, gold, silver and other metals from the waste incineration plant slag, the particle size is 400cm in specific surface area 2 / g; The finely ground tailings powder is directly dried with hot flue gas to obtain sorted tailings micropowder with a moisture content of 0.5% and free CaO and MgO contents <1%.

[0060] 2) Mixture preparation: dry-mix the fine powder of sorted tailings with cement and early strength agent in proportion, and the mixing time is 5 minutes. Ordinary Portland cement is used for cement; the ratio of sorted tailings micropowder:cement is 4:6; the early strength agent is calcium chloride, and the addition ratio is 3% of the total dry basis of cement and sorted tailings micropowder.

[0061] 3) Foam preparation: Dilute the foaming agent 30 times with water and stir slightly evenly, and then use a cement foami...

Embodiment 3

[0068] Prepare the insulation material as follows:

[0069] 1) Fine grinding: Grinding the remaining tailings after sorting out iron, aluminum, copper, zinc, gold, silver and other metals from the waste incineration plant slag, the particle size is 500cm in specific surface area 2 / g; The finely ground tailings powder is directly dried with hot flue gas to obtain sorted tailings micropowder with a moisture content of 0.3% and free CaO and MgO contents <1%.

[0070] 2) Mixture preparation: dry-mix the sorted tailings fine powder with cement and early strength agent in proportion, and the mixing time is 7 minutes. Ordinary Portland cement is used for cement; the ratio of sorted tailings powder: cement is 1:19; the early strength agent is sodium sulfate and urea compounded at 1:1, and the addition ratio is the total amount of cement and sorted tailings powder on a dry basis 2%.

[0071] 3) Foam preparation: Dilute the foaming agent 40 times with water and stir slightly evenly, ...

technical field

[0001] The invention relates to the field of comprehensive utilization of solid waste resources, in particular to a method for resource utilization of domestic waste incineration slag sorting tailings. Background technique

[0002] Domestic waste incineration power generation has been widely used in my country. Its advantages are: after incineration, the volume of waste can be reduced by more than 70%, which can solve the problems of high land cost of landfill and inability to meet the landfill capacity requirements. The high-temperature gas produced by waste incineration Energy can be recovered and reused. Incineration slag is a by-product of the waste incineration process, mainly including residues on the grate and particles falling from between the grates, and its output accounts for about 20%-30% of the mass of the original garbage. Since garbage is the end point of metal substances in social life, the fine-grained slag is regarded as the raw material for...

Examples

Embodiment 1

[0048] Prepare foam concrete blocks as follows:

[0049] 1) Fine grinding: Grinding the remaining tailings after sorting out iron, aluminum, copper, zinc, gold, silver and other metals from the waste incineration plant slag, the particle size is 700cm in specific surface area 2 / g; The finely ground tailings powder is directly dried with hot flue gas to obtain sorted tailings micropowder with a moisture content of 1% and free CaO and MgO contents <1%.

[0050] 2) Mixture preparation: dry-mix the fine powder of sorted tailings with cement and early strength agent in proportion, and the mixing time is 10 minutes. Ordinary Portland cement is used for cement; the ratio of sorted tailings micropowder:cement is 3:7; the early strength agent is sodium silicate and triethanolamine compounded at 1:1, and the addition ratio is cement and sorted tailings micropowder dry basis 1% of the total amount.

[0051] 3) Foam preparation: Dilute the foaming agent 50 times with water and stir sli...

Embodiment 2

[0058] Prepare foam concrete blocks as follows:

[0059] 1) Fine grinding: Grinding the remaining tailings after sorting out iron, aluminum, copper, zinc, gold, silver and other metals from the waste incineration plant slag, the particle size is 400cm in specific surface area 2 / g; The finely ground tailings powder is directly dried with hot flue gas to obtain sorted tailings micropowder with a moisture content of 0.5% and free CaO and MgO contents <1%.

[0060] 2) Mixture preparation: dry-mix the fine powder of sorted tailings with cement and early strength agent in proportion, and the mixing time is 5 minutes. Ordinary Portland cement is used for cement; the ratio of sorted tailings micropowder:cement is 4:6; the early strength agent is calcium chloride, and the addition ratio is 3% of the total dry basis of cement and sorted tailings micropowder.

[0061] 3) Foam preparation: Dilute the foaming agent 30 times with water and stir slightly evenly, and then use a cement foami...

Embodiment 3

[0068] Prepare the insulation material as follows:

[0069] 1) Fine grinding: Grinding the remaining tailings after sorting out iron, aluminum, copper, zinc, gold, silver and other metals from the waste incineration plant slag, the particle size is 500cm in specific surface area 2 / g; The finely ground tailings powder is directly dried with hot flue gas to obtain sorted tailings micropowder with a moisture content of 0.3% and free CaO and MgO contents <1%.

[0070] 2) Mixture preparation: dry-mix the sorted tailings fine powder with cement and early strength agent in proportion, and the mixing time is 7 minutes. Ordinary Portland cement is used for cement; the ratio of sorted tailings powder: cement is 1:19; the early strength agent is sodium sulfate and urea compounded at 1:1, and the addition ratio is the total amount of cement and sorted tailings powder on a dry basis 2%.

[0071] 3) Foam preparation: Dilute the foaming agent 40 times with water and stir slightly evenly, ...

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