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Formula for producing sintered bricks from iron tailings and application of formula

A technology for sintered bricks and iron tailings, which is applied in the removal of solid wastes and other directions, can solve the problems that are not conducive to improving the market competitiveness of products, difficult to comprehensively utilize tailings, and have a large impact on the cost of sintered bricks, so as to optimize mineral composition and physical properties. Features, Reduced Occupancy, Low Price Effect

Inactive Publication Date: 2016-06-08
范庆霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of pulverized coal, it has a great impact on the cost of producing sintered bricks, which is not conducive to improving the market competitiveness of products
[0005] Affected by ore-forming conditions, the mineral composition of different types of mines varies greatly, and the composition of tailings also varies, which brings great difficulties to the comprehensive utilization of tailings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]The comprehensive mining and dressing production capacity of an iron mine is 3000t / d. The ore concentrator adopts two-stage closed-circuit crushing and one-stage closed-circuit grinding process. After desulfurization by flotation and phosphorus reduction by magnetic separation, while obtaining iron concentrate products A large number of high-silicon and low-aluminum iron tailings are produced every year, which need to be accumulated in farmland, mountain farms and forest land. The comprehensive utilization of these tailings is of great significance. According to the invention, iron tailings (especially high-silicon and low-aluminum iron tailings) are mainly mixed with a certain proportion of coal slime to form a sintered brick mixture. Firstly, samples were taken to detect SiO in iron tailings and coal slime 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO content and coal slime ash and calorific value, and then determine the appropriate ratio according to the test results, so that...

Embodiment 2

[0030] The comprehensive production capacity of a molybdenum mine is 3000t / d. The concentrator adopts the process of "two and a half stages" closed-circuit crushing and one-stage closed-circuit grinding. After one roughing, three times of sweeping and three times of beneficiation, the molybdenum concentrate is produced. A large number of high-silicon and low-aluminum tailings are produced, which need to be accumulated in farmland, mountain farms and forests. The comprehensive utilization of these tailings is of great significance. According to the invention, molybdenum tailings (especially high-silicon and low-aluminum molybdenum tailings) are mainly mixed with a certain proportion of coal slime to form a sintered brick mixture. Firstly, samples were taken to detect SiO in molybdenum tailings and coal slime 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO content, as well as the ash content and calorific value of the coal slime, and then determine the appropriate proportion according to ...

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Abstract

The invention relates to a formula of for producing sintered bricks from iron tailings. The formula is applicable to the production of sintered bricks by taking fine-grain iron tailings as a main raw material. According to the formula, the iron tailings (or other metallic and nonmetallic tailings) which are subjected to concentrating and dewatering are mixed with a certain ratio of coal slurry so as to form raw materials, the content of SiO2 in the mixture is enabled to be higher than 50%, the content of Al2O3 in the mixture is enabled to be higher than 6%, the content of CaO in the mixture is enabled to be lower than 6%, the content of MgO in the mixture is enabled to be lower than 6%, the calorific value is controlled to be 1.465MJ / Kg to 1.780 MJ / Kg, and thus the requirements on green brick sintering are met. The formula has the effects that the mixture overcomes the defects of the iron tailings and the coal slurry separately served as raw materials of the sintered bricks, the mineral composition and physical properties of the raw materials are optimized, the comprehensive utilization of fine-grain tailings of mines is realized, and the reduction of the cost of the sintered bricks is facilitated.

Description

【Technical field】 [0001] The invention belongs to the fields of mineral processing, energy saving and environmental protection, and in particular relates to a formula for producing sintered bricks from iron tailings and its application. Mine tailings are used as the main raw material for the production of fired bricks and their products. 【Background technique】 [0002] Tailings are the waste produced in mines. In addition to filling underground gobs and a small amount of comprehensive utilization, most mines in China currently use tailings ponds to store wet (or dry) fine-grained tailings, which not only takes up a lot of farmland, Mountain forest land may also bring serious safety and environmental protection problems. With the country's increasing requirements for mine development resources, safety and environmental protection, many mines have increased the comprehensive utilization of tailings. The use of tailings to produce sintered bricks, cement and other building mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00B09B3/00
Inventor 范庆霞
Owner 范庆霞
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