Full-resource iron tailing utilization method

A technology of iron tailings and all resources, applied in the field of recycling of solid waste resources, can solve the problems of low mechanical properties and narrow application range, and achieve the effects of promoting plant growth, reducing production costs, and increasing production

Active Publication Date: 2018-09-28
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In construction materials, iron tailings are mainly used to prepare concrete, permeable bricks and other products, however, the mechanical properties of concrete materials prepared in the prior art are low, and the application range is narrow

Method used

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  • Full-resource iron tailing utilization method
  • Full-resource iron tailing utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] This embodiment is a method for fully utilizing iron tailings resources, including the following steps:

[0082] Step 1: Send the iron tailings to a 30mm-class screening machine through a feeder for pre-screening, and obtain materials with a particle size greater than 30mm and materials with a particle size less than 30mm respectively;

[0083] Step 2: Put the material with a particle size greater than 30mm into a crusher to be crushed to a particle size less than 30mm, and mix with the material with a particle size less than 30mm obtained in step 1, to obtain a mixed material;

[0084] Step 3: Pass the mixture through a 10mm-class sieving machine, and sieving to obtain coarse aggregates with a particle size of 10-30mm and materials with a particle size of less than 10mm;

[0085] Step 4. Put the material with a particle size of less than 10mm into the crusher for crushing, and then pass the crushed material through a 5mm-class sieving machine to obtain medium aggregates with a ...

Embodiment 2

[0092] This embodiment is the preparation method of iron tailing-based mineral compound fertilizer in embodiment 1, including the following steps:

[0093] Step 1: Mix 50 parts of iron tailings powder, 10 parts of saw mud, 10 parts of sedimentation mud, and 30 parts of potassium hydroxide to obtain a mixture material;

[0094] Step two, calcining the mixture, calcining at 1050°C for 3 hours, and then cooling to room temperature;

[0095] Step 3. Crush the cooled mixture to 300 meshes to obtain iron tailing-based mineral compound fertilizer;

[0096] The iron tailing-based mineral compound fertilizer prepared above was tested according to the corresponding test method of the chemical industry standard HG 2557-94 calcium-magnesium phosphate fertilizer standard of the People’s Republic of China. The active ingredient content is K 2 O is 22.10%, SiO 2 It is 26.50%, MgO is 2.86%, and CaO is 5.17%.

Embodiment 3

[0098] This embodiment is the preparation method of iron tailing-based mineral compound fertilizer in embodiment 1, including the following steps:

[0099] Step 1: Mix 50 parts of iron tailings powder, 15 parts of saw mud, 10 parts of sedimentation mud, and 30 parts of potassium hydroxide to obtain a mixture material;

[0100] Step two: calcining the mixed material, calcining at 1100°C for 2h, and then cooling to room temperature;

[0101] Step 3: Crush the cooled mixture to 120 meshes to obtain iron tailing-based mineral compound fertilizer.

[0102] The detection method of Example 2 was used to detect the iron tailing-based mineral compound fertilizer prepared above, and its effective ingredient content was: K 2 O is 23.10%, SiO 2 29.00%, MgO 2.96%, CaO 6.17%

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Abstract

The invention relates to a full-resource iron tailing utilization method. According to the full-resource iron tailing utilization method, iron tailings are crushed and sieved to obtain aggregates andpowders with different grain sizes, the aggregates and the powders with the different grain sizes are used for preparing various iron tailing resource utilization products so as to achieve full-resource utilization of the iron tailings, and the proportions of the aggregates with the different grain sizes can be controlled according to different needs of the resource utilization products so as to improve the comprehensive performance of the resource utilization products.

Description

Technical field [0001] The invention relates to the technical field of solid waste resource recycling, in particular to a method for utilizing iron tailings full resources. Background technique [0002] Iron tailings are waste residues produced in the process of iron ore mining and beneficiation, and are the main component of industrial solid waste. China's iron ore resources have the characteristics of low grade and many symbiotic associated ore, resulting in a large amount of iron tailings during the beneficiation process. Associated waste rock is usually hard and brittle, and a large number of fragments are inevitably produced during the mining process. Due to the cost limitation of manual selection, a large number of small crushed stones of excellent quality are returned to the tailings and piled in the tailings pond. Utilization causes a lot of waste of resources; moreover, piling up iron tailings not only takes up a lot of land, but also easily causes damage to the surroun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/12C05G1/00C05G3/04C09K17/08C04B26/04C04B28/04C04B28/06C05G3/80
CPCC04B18/12C04B26/045C04B28/04C04B28/06C05D1/00C05G3/80C09K17/08C04B2103/40C04B24/003C04B2103/302C04B2103/22C05D3/02C05D9/00C05D9/02C05G1/00Y02W30/91
Inventor 张以河胡攀王新珂张娜褚博华陈飞旭
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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