Cement active mixed material prepared from waste incineration fly ash and cyanidation tailings and preparation method of cement active mixed material

A technology of waste incineration fly ash and active mixed material, which is applied in the field of cement active mixed material and its preparation, can solve the problems of waste incineration fly ash and cyanide tailings pollution, etc., and achieves expansion of stable sources, good economic benefits, and significant economic benefits. effect of benefit

Pending Publication Date: 2022-07-29
BEIJING JINYU MANGROVE ENVIRONMENTAL PROTECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a cement active mixed material prepared from waste incineration fly ash and cyanide tailings and a preparation method thereof, in which waste incineration fly ash and cyanide tailings are compounded in an appropriate proportion to produce Appropriately sized pellets are sintered in a sintering furnace at a high temperature above 1100°C, quenched to obtain a sintered body, and then the sintered body is ground to a certain fineness to prepare a cement active mixture that meets the requirements, solving the problem of waste incineration fly ash and The pollution of cyanide tailings to the environment, using the complementary and synergistic effects of the two components, realizes the large-scale resource utilization of the two solid wastes, expands the stable source of cement active admixtures, and reduces the cost of cement production, which has significant economic benefits. Environmental and Social Benefits

Method used

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  • Cement active mixed material prepared from waste incineration fly ash and cyanidation tailings and preparation method of cement active mixed material
  • Cement active mixed material prepared from waste incineration fly ash and cyanidation tailings and preparation method of cement active mixed material
  • Cement active mixed material prepared from waste incineration fly ash and cyanidation tailings and preparation method of cement active mixed material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] S1. Material preparation: select the original raw materials of waste incineration fly ash and the original raw materials of cyanide tailings for use;

[0044] S2. Compounding and mixing: 30 parts of the raw materials of waste incineration fly ash calculated on a dry basis and 70 parts of the original raw materials of cyanide tailings calculated on a dry basis are transported into the mixer for compounding and mixing to obtain a water content of 15%. A well-mixed compound mixture;

[0045] S3, granulation: the mixture in step S2 is transported into the ball-forming equipment, without adding any binder, directly rolled or pressed into compound wet granules with a particle size of 2-8 mm;

[0046] S4, sintering: transfer the compounded wet granules in step S3 to a sintering furnace, heat up to a sintering temperature of 1130° C. at a heating rate of 30° C. / min, hold for 50 mins, and then quench in cold air to obtain a complex with sintered body;

[0047] S5, grinding: th...

Embodiment 2

[0050] S1. Material preparation: select the original raw materials of waste incineration fly ash and the original raw materials of cyanide tailings for use;

[0051] S2. Compounding and mixing: 40 parts of raw materials of waste incineration fly ash calculated on a dry basis and 60 parts of original raw materials of cyanide tailings calculated on a dry basis are transported into a mixer for compounding and mixing, and a water content of 13.3% is obtained. A well-mixed compound mixture;

[0052] S3, granulation: the mixture in step S2 is transported into the ball-forming equipment, without adding any binder, directly rolled or pressed into compound wet granules with a particle size of 2-8 mm;

[0053] S4, sintering: transfer the compound wet granules in step S3 to a sintering furnace, heat up to a sintering temperature of 1140°C at a heating rate of 25°C / min, keep the temperature for 40mins, and then quench in cold air to obtain a complex with sintered body;

[0054] S5. Grin...

Embodiment 3

[0057] S1. Material preparation: select the original raw materials of waste incineration fly ash and the original raw materials of cyanide tailings for use;

[0058] S2. Compounding and mixing: 50 parts of the original raw materials of waste incineration fly ash calculated on a dry basis and 50 parts of the original raw materials of cyanide tailings calculated on a dry basis are transported into the mixer for compounding and mixing to obtain a water content of 11.5%. A well-mixed compound mixture;

[0059] S3, granulation: the mixture in step S2 is transported into the ball-forming equipment, without adding any binder, directly rolled or pressed into compound wet granules with a particle size of 2-8 mm;

[0060] S4, sintering: transfer the compounded wet granules in step S3 to a sintering furnace, heat up to a sintering temperature of 1150°C at a heating rate of 20°C / min, hold for 30mins, and then quench in cold air to obtain a complex with sintered body;

[0061] S5, grindi...

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Abstract

The invention discloses a cement active mixed material prepared from waste incineration fly ash and cyanidation tailings and a preparation method thereof.The preparation method comprises the steps that the waste incineration fly ash and the cyanidation tailings are compounded according to a proper proportion to be prepared into granules with the proper size, the granules are sintered in a sintering furnace at the high temperature of 1,100 DEG C or above and quenched to obtain a sintered body, then the sintered body is ground to a certain fineness, and the cement active mixed material is obtained. The problem that the environment is polluted by the waste incineration fly ash and the cyanidation tailings is solved, the complementary and synergistic effects of the two components are utilized, bulk resource utilization of the two solid wastes is achieved, the stable source of the cement active admixture is expanded, and the cement production cost is reduced. The method has remarkable economic benefits, environmental benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment and comprehensive utilization, in particular to a cement active mixed material prepared from waste incineration fly ash and cyanide tailings and a preparation method thereof. Background technique [0002] Waste incineration is the most effective way to deal with municipal solid waste at present, but it will produce 3% to 4% of waste incineration fly ash. Waste incineration fly ash is included in the "National Hazardous Waste List" in my country because it is rich in toxic heavy metals (Hg, Pb, Cd, Cu, Cr, Zn, etc.) and dioxins and other harmful substances. In 2020 alone, my country's waste incineration capacity will exceed 500,000 tons per day, and the incineration fly ash will produce about 16,000 tons per day. For a long time, the disposal of fly ash has been a very difficult problem. At present, most of the disposal of fly ash in my country is to be transported to conventional lan...

Claims

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Application Information

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IPC IPC(8): C04B7/28C04B7/24C04B7/36
CPCC04B7/28C04B7/24C04B7/36Y02P40/10
Inventor 王阳宁彩珍赵阳张大龙秦二兰姜雨生李继荣
Owner BEIJING JINYU MANGROVE ENVIRONMENTAL PROTECTION TECH
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