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A kind of iron tailings full resource utilization method

A technology for iron tailings and full resources, applied in the field of solid waste resource recycling, can solve the problems of low mechanical properties and narrow application range, and achieve the effects of improving comprehensive performance, improving conversion efficiency, and improving utilization rate

Active Publication Date: 2020-09-01
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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  • A kind of iron tailings full resource utilization method
  • A kind of iron tailings full resource utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] This embodiment is a method for utilizing all resources of iron tailings, comprising the following steps:

[0082] Step 1. Send the iron tailings to a 30mm-level screening machine through a feeder for pre-screening, and obtain materials with a particle size larger than 30mm and materials with a particle size smaller than 30mm;

[0083] Step 2, putting the material with a particle size greater than 30mm into a crusher and crushing it to a particle size smaller than 30mm, and mixing it with the material with a particle size smaller than 30mm obtained in step 1 to obtain a mixed material;

[0084] Step 3, pass the mixed material through a 10mm class screening machine, and sieve to obtain coarse aggregate with a particle size of 10-30mm and materials with a particle size smaller 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-level screening machine to screen ...

Embodiment 2

[0092] The present embodiment is the preparation method of iron tailings-based mineral compound fertilizer in embodiment 1, comprises the following steps:

[0093] Step 1, mixing 50 parts of iron tailings powder, 10 parts of sawing mud, 10 parts of sedimentation mud and 30 parts of potassium hydroxide to obtain a mixed material;

[0094] Step 2: calcining the mixed material at 1050°C for 3 hours, then cooling to room temperature;

[0095] Step 3, pulverizing the cooled mixed material to 300 mesh to obtain iron tailings-based mineral compound fertilizer;

[0096] 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 iron tailings-based mineral compound fertilizer prepared above is tested, and its active ingredient content is: K 2 O is 22.10%, SiO 2 is 26.50%, MgO is 2.86%, and CaO is 5.17%.

Embodiment 3

[0098] The present embodiment is the preparation method of iron tailings-based mineral compound fertilizer in embodiment 1, comprises the following steps:

[0099] Step 1, mixing 50 parts of iron tailings powder, 15 parts of sawing mud, 10 parts of sedimentation mud and 30 parts of potassium hydroxide to obtain a mixed material;

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

[0101] Step 3, pulverizing the cooled mixed material to 120 mesh to obtain iron tailings-based mineral compound fertilizer.

[0102] Adopt the detection method of embodiment 2 to detect the iron tailings base mineral compound fertilizer of above-mentioned preparation, and its active ingredient content is: K 2 O is 23.10%, SiO 2 29.00% for MgO, 2.96% for CaO, 6.17% for CaO

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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 recycling of solid waste resources, in particular to a method for utilizing all resources of iron tailings. Background technique [0002] Iron tailings are waste residues produced during iron ore mining and beneficiation, and are the main component of industrial solid waste. China's iron ore resources are characterized by low grade and many symbiotic and associated ores, which lead to a large amount of iron tailings in the beneficiation process. The 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 with excellent quality are returned to the tailings and piled up in the tailings pond, which cannot be obtained. Utilization causes a lot of waste of resources; and stacking iron tailings not only takes up a lot of land, but also easily cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/12C05G1/00C05G3/80C09K17/08C04B26/04C04B28/04C04B28/06
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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