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Biological haydite burned from mine tailings, and preparation and use method thereof

A technology of biological ceramsite and mine tailings, which is applied to other household appliances, applications, household appliances, etc., can solve the problems of large output of solid waste, low rate of iron concentrate, and low added value, etc., to achieve convenient operation, reduce The effect of pollution, simple preparation method

Inactive Publication Date: 2009-07-22
刘阳生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of iron tailings as building materials and gob fills has low or no added value; while as a soil conditioner or trace element fertilizer, there are strict requirements on tailings components, and the amount of use is very small; re-selection Or the comprehensive recovery of valuable elements has the disadvantages of large solid waste output, low iron ore concentrate yield, and large investment

Method used

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  • Biological haydite burned from mine tailings, and preparation and use method thereof
  • Biological haydite burned from mine tailings, and preparation and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation method

[0032] 1), raw material mixing: crush and mix the raw materials evenly according to the following proportions by weight: 3 parts of iron tailings; 5 parts of fly ash; 3 parts of urban sludge;

[0033] 2), granulation: granulate the uniformly mixed raw materials into particles with a particle size of 10mm;

[0034] 3) Sintering: Sintering is carried out according to the following sintering conditions: preheating at a preheating temperature of 300°C for 30 minutes; heating at a heating rate of 30°C / min to 1250°C; and firing at a firing temperature of 1250°C for 40 minutes.

[0035] The prepared biological ceramsite is well sintered as a whole, with a rough appearance and well-developed pores, and the internal pores are connected.

Embodiment 2

[0036] Example 2 Preparation method

[0037] 1) Mixing of raw materials: crush and mix the raw materials uniformly according to the following proportions by weight: 5 parts of iron tailings; 3 parts of fly ash; 1 part of rice straw;

[0038] 2), granulation: granulate the uniformly mixed raw materials into particles with a particle size of 100 mm;

[0039] 3) Sintering: Sintering is carried out according to the following sintering conditions: preheating at a preheating temperature of 550°C for 15 minutes; heating at a heating rate of 10°C / min to 1000°C; and firing at a firing temperature of 1000°C for 100 minutes.

[0040] The prepared biological ceramsite is well sintered as a whole, with a rough appearance and well-developed pores, and the internal pores are connected.

Embodiment 3

[0041] Example 3 Preparation method

[0042] 1) Mixing of raw materials: crush and mix the raw materials evenly according to the following proportions by weight: 3 parts of iron tailings; 5 parts of fly ash; 1 part of litter;

[0043] 2), granulation: granulate the uniformly mixed raw materials into particles with a particle size of 50 mm;

[0044] 3) Sintering: Sintering is carried out according to the following sintering conditions: preheating at 450°C for 20 minutes; heating at a heating rate of 20°C / min to 1100°C; firing at a firing temperature of 1100°C for 80 minutes.

[0045] The prepared biological ceramsite is well sintered as a whole, with a rough appearance and well-developed pores, and the internal pores are connected.

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Abstract

The invention discloses a biologic porcelain granule baked by mine tailings, a preparation method and a using method thereof. The biologic porcelain granule baked by mine tailings is produced by taking 3 to 5 portions of mine tailings, 3 to 5 portions of fly ash as well as 1 to 3 portions of mud or biomass foaming agent as the materials, preheating for 15 to 30min at the preheating temperature between 300 and 550 DEG C, raising the temperature to be between 1000 and 1250 DEG C at the temperature rising speed of 10 to 30 DEG C / min, and baking for 40 to 100min under the condition of the baking temperature between 1000 and 1250 DEG C; the biologic porcelain granule baked by mine tailings can be used as a microbion carrier for the biological treatment of sewage. The removing efficiency of sewage treatment can achieve 90 to 92 percent of COD, 60 to 80 percent of ammonian as well as 60 to 72 percent of phosphor. The invention is a biologic porcelain granule produced under the condition that the operating factor of the tailings is higher, reduces the pollution of iron tailings and urban mud, and purifies the urban sewage. The preparation method of the invention is simple and easy. A sewage biological treatment device using the invention is simple in structure and convenient to run.

Description

technical field [0001] The invention relates to a method for preparing biological ceramsite from mine tailings and urban sludge biomass. Background technique [0002] With the comprehensive and high-speed development of my country's mining industry, the tailings discharged from the concentrator are also increasing at an alarming rate. For example, Ansteel Group is a large-scale iron and steel enterprise in my country. Ansteel is rich in mineral resources, and there are several major mines in Qidashan, Dahushan, Dong'anshan and Gongchangling in the surrounding area. While producing iron ore concentrates, various mines also produce a large amount of solid waste, and the annual discharge of tailings from ore concentrators alone has reached more than 17 million tons. The total amount of iron tailings has reached as much as 500 million. [0003] The average mining grade of iron ore in our country is 32%. Only 1 ton of product can be obtained for every 3 tons of raw ore, and 2 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C04B38/00
CPCY02P40/60
Inventor 刘阳生杜芳
Owner 刘阳生
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