Application of serpentine magnesium extraction tailings in field of concrete and the concrete

A concrete and serpentine technology, applied in the field of concrete, can solve the problems of unfavorable resource recycling and utilization

Active Publication Date: 2019-11-22
BEIJING OUFEI JINTAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no good treatment method for these tailings, which is not conducive to the recycling of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] In the present invention, there is no special limitation on the preparation method of the concrete, which can be prepared by the preparation method well known to those skilled in the art.

[0030] In order to further illustrate the present invention, the application of the serpentine magnesium tailings provided by the present invention in the concrete field and the concrete are described in detail below in conjunction with examples, but they should not be understood as limiting the protection scope of the present invention.

[0031] The preparation method of the magnesium tailings extracted from serpentine used in the embodiments of the present invention is as follows:

[0032] The massive serpentine ore is mined, with a maximum block size of 30 cm. The main ore mineral in serpentine ore is serpentine, and contains a small amount of olivine and chromium spinel, and the metal minerals include magnetite, hematite, chromite, pentlandite and chalcopyrite. The chemical comp...

Embodiment 1

[0040] Use the tailings of No. 2 as raw material to make cementitious material first, and the specific surface area of ​​the test is 590m 3 / kg, desulfurization gypsum is 620m 3 / kg.

[0041]According to the proportion of cementitious material in the main concrete is 500kg / m 3 , the water-binder ratio is 0.27, and it is cured at 25°C with damp heat. According to the proportion of tailings and desulfurization gypsum 400:100 (kg), mix evenly, add aggregate (1212 kg of waste rock and 653 kg of iron ore fine sand) 1865 kg, sand ratio 0.35, add water 135 kg, 2.0 kg lignin sulphur Salt water reducer, the water reducing rate can reach 20%, the fine iron sand particle size ranges from 0.088 to 4.75mm, and the waste rock particle size ranges from 4.75 to 26.5mm.

[0042] After being stirred by a mixer, quickly test the slump of the concrete according to the "Standard for Performance Test Methods of Ordinary Concrete Mixtures" (Standard No. GB / T50080-2002), and then pour it into a 10...

Embodiment 2

[0046] Use the tailings of No. 1 as raw material to manufacture cementitious material first, and the specific surface area of ​​the test is 600m 3 / kg, desulfurization gypsum is 600m 3 / kg.

[0047] According to the proportion of cementitious material in the main concrete is 500kg / m 3 , the water-binder ratio is 0.28, and it is cured at 20°C with damp heat. According to the ratio of tailings and desulfurized gypsum 440:60 (kg), mix evenly, add aggregate (1119 kg of waste rock and 746 kg of iron ore fine sand) 1865 kg, sand rate 0.40, add 140 kg of water, 2.0 kg of polycarboxylic acid Series PC high-efficiency water reducing agent, the water reducing rate can reach 25%, the fine iron sand particle size ranges from 0.088 to 4.75mm, and the waste rock particle size ranges from 4.75 to 26.5mm.

[0048] After being stirred by a mixer, quickly test the slump of the concrete according to the "Standard for Performance Test Methods of Ordinary Concrete Mixtures" (Standard No. GB / T50...

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Abstract

The invention provides application of serpentine magnesium extraction tailings in the field of concrete and the concrete, and belongs to the field of concrete. According to the method, the serpentinemagnesium extraction tailings are used for preparing the concrete, so that the serpentine magnesium extraction tailings are completely utilized, and reutilization of resources is acehived. The invention further provides the concrete, in which the serpentine magnesium extraction tailings are used, and the effect of the concrete is equivalent to the performance of cement clinker-based concrete, so that the strength of the concrete can be improved, the concrete can completely replace cement for use; and meanwhile, the serpentine magnesium extraction tailings enable the concrete not to easily generate cracks; due to the water reducing agent, the concrete has good construction fluidity and is convenient to construct; the desulfurized gypsum can effectively reduce the setting time of the concrete, accelerate the construction speed and improve the durability of the concrete, and the components are matched with each other and have a synergistic effect, so that the concrete provided by the invention has very excellent strength, durability, fluidity and crack resistance, and is suitable for wide popularization and application.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to the application of serpentine magnesium extraction tailings in the concrete field and the concrete. Background technique [0002] There are a large amount of serpentine in my country, reaching the level of 100 billion tons, which is a good raw material for the production of metal magnesium. Moreover, there is also a large amount of laterite nickel ore in my country. The gangue mineral is serpentine type, which is also a good raw material for magnesium smelting. Therefore, when these serpentinite and laterite nickel ores are used to extract metal magnesium, a large amount of tailings will be generated. At present, there is no good treatment method for these tailings, which is not conducive to the recycling of resources. Contents of the invention [0003] In view of this, the purpose of the present invention is to provide a kind of serpentine magnesium extraction tailings appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B7/153
CPCC04B7/153C04B28/144C04B2111/00017C04B2201/50C04B14/02C04B2103/302C04B18/04C04B18/12C04B14/308Y02P40/10
Inventor 卢惠民卢小溪
Owner BEIJING OUFEI JINTAI TECH CO LTD
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