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Superfine sulfur-containing tailing concrete

A technology of concrete and sulfur tailings, applied in the field of resource utilization of sulfur tailings, which can solve the problems of low market acceptance, immature properties of alkali-activated materials, and affecting the promotion and application of sulfur tailings-based concrete products, etc. To achieve the effect of increasing the bulk density

Active Publication Date: 2021-07-23
安徽铜冠产业技术研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of alkali-activated materials is not yet fully mature, there is still a large distance between research and application, and the market acceptance is low (only a few buildings or airports in the world use alkali-activated materials, and my country has only promulgated 3 relevant standards)
However, if alkali-activated materials are directly used to cement sulfur-containing tailings to prepare concrete, it will inevitably seriously affect the promotion and application of sulfur-containing tailings-based concrete products, and limit the resource utilization of sulfur-containing tailings.

Method used

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Experimental program
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Embodiment 1

[0025] Embodiment 1: An ultrafine sulfur-containing tailings concrete, including M32.5 cement, ultrafine sulfur-containing tailings, sand, stones, water reducing agent and water. Concrete parts by weight (kg) proportioning ratio as shown in Table 1,

[0026] Table 1

[0027]

[0028] Among them: the density of M32.5 cement is 3.1g / cm 3 ; The fineness modulus of the sand is 2.5; the superfine sulfur-containing tailings pass through a 200 mesh sieve, the average particle size is 76 microns, and the density is 3.06g / cm 3 , sulfur content (converted into SO 3By mass, %) 3.37%; the stone is 10-20mm continuous grain grade limestone; the water is tap water, the density is 1g / cm 3 ; The water reducer is a polycarboxylate high-performance water reducer; the slurry replacement rate is superfine sulfur-containing tail replacing the mortar volume (the volume of M32.5 cement and water).

[0029] Prepare concrete according to the ratio shown in Table 1, pour it into a cubic steel mol...

Embodiment 2

[0034] The invention provides an ultrafine sulfur-containing tailings concrete, which includes M32.5 cement, ultrafine sulfur-containing tailings, sand, stones, water reducing agent and water. Concrete parts by weight (kg) proportioning ratio as shown in table 3,

[0035] table 3

[0036]

[0037]

[0038] Among them: the density of M32.5 cement is 3.1g / cm 3 ; The fineness modulus of the sand is 2.5; the superfine sulfur-containing tailings pass through a 200 mesh sieve, the average particle size is 76 microns, and the density is 3.06g / cm 3 , sulfur content (converted into SO 3 By mass, %) 3.37%; the stone is 10-20mm continuous grain grade limestone; the water is tap water, the density is 1g / cm 3 ; Water reducer is polycarboxylate high performance water reducer. Among them, the slurry replacement rate is the superfine sulfur-containing tail replacing the mortar volume (the volume of M32.5 cement and water).

[0039] Prepare concrete according to the ratio shown in T...

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Abstract

The invention discloses superfine sulfur-containing tailing concrete. The superfine sulfur-containing tailing concrete is prepared from the following raw materials: low-clinker cement and superfine sulfur-containing tailings. According to the present invention, the cementing technology principle is adopted, the M32.5 low-clinker composite cement is adopted as the cementing material, and the superfine sulfur-containing tailings are adopted to replace the cement and the water in the same volume so as to prepare the superfine sulfur-containing tailing high-content concrete; sulfate released by acidification of sulfide of the superfine sulfur-containing tailings is fully utilized to excite high-quantity auxiliary materials of the M32.5 cement, the cementing strength is improved, the economic value of the superfine sulfur-containing tailings is improved to the level of the M32.5 cement, waste is turned into wealth, and harm is turned into treasure. The concrete disclosed by the invention is stable in mechanical property and micro-expansive. The method is simple to operate and low in cost, and has a wide application prospect under the background of shortage of raw materials in the building material market.

Description

technical field [0001] The invention relates to the field of resource utilization of sulfur-containing tailings, in particular to ultrafine sulfur-containing tailings concrete. Background technique [0002] Tailings are industrial solid wastes discharged during the sorting operation after ore mining, and the amount is huge. According to statistics, the national discharge of iron tailings alone is as high as about 12 billion m 3 . Such a huge amount of tailings not only accumulates and occupies land, seriously pollutes soil, water resources and air, but also needs to invest a lot of money in the maintenance and operation of tailings ponds. Therefore, the resource utilization of tailings has become the consensus of all walks of life, and it is also the key direction of the recycling of industrial solid waste resources in China. [0003] However, the tailings discharged from the non-ferrous metal industry are often associated with a large amount of sulfide (mainly pyrite, Fe...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/02C04B14/06C04B18/12C04B2103/302Y02W30/91
Inventor 丁鹏陈佩圆张驰庞勃彭时忠郭运鑫张群英王周和朱继生
Owner 安徽铜冠产业技术研究院有限责任公司
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