All-solid-waste cementing material for fine tailing filling and preparation method thereof

A technology of cementitious materials and thin tails, which is applied in cement production and other directions, can solve the problem of high cost of cementitious materials, and achieve the effects of low cost, high connection and simple process.

Inactive Publication Date: 2020-10-23
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of the cementitious material thus prepared is: the cost of preparing the cementitious material from artificial material compound activator and slag is high

Method used

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  • All-solid-waste cementing material for fine tailing filling and preparation method thereof
  • All-solid-waste cementing material for fine tailing filling and preparation method thereof
  • All-solid-waste cementing material for fine tailing filling and preparation method thereof

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preparation example Construction

[0034] The invention provides an all-solid waste cementitious material used for filling fine tailings and a preparation method thereof.

[0035] The material comprises 35%-50% of steel slag, 15%-25% of chemical gypsum and 25%-50% of slag by weight.

[0036] Among them, the basicity of steel slag M=CaO / [SiO 2 +P 2 o 5 ]>1.8, fineness of steel slag powder≤15% or specific surface area≥400m 2 / kg, steel slag powder iron metal content ≤ 2%, moisture content < 3%.

[0037] Mineral constituents of chemical gypsum SO 3 Content ≥ 38%, moisture content 2 / kg.

[0038] Slag quality factor Activity index M a =Al 2 o 3 / SiO 2 ≥0.3, slag powder fineness ≤5%, moisture content <3%.

[0039] The content of +200 mesh fine particles in the fine tailings is ≤85%.

Embodiment 1

[0042] A kind of steel slag, slag and chemical gypsum in the all-solid waste cementitious material used for fine tailings filling, taken from Sanming Iron and Steel Company, by weight: steel slag powder 30%-35%, slag and gypsum mixed powder 65%- 70%. The material characteristic parameters are as follows: steel slag mineral composition is shown in Table 1, alkalinity The particle size distribution curve of steel slag powder is shown in figure 1 .

[0043] Table 1: Mineral composition of steel slag from Fujian Sanming Iron and Steel Company

[0044]

[0045]

[0046] The mineral composition of slag is shown in Table 2, quality factor Activity coefficient The particle size distribution curve of slag powder is shown in figure 2 . The mineral composition of chemical gypsum is shown in Table 3, where SO 3 The content is 50.2%, the particle size distribution see image 3 .

[0047] Table 2: Mineral composition of slag from Sanming Iron and Steel Company

[0048] ...

Embodiment 2

[0057] The steel slag powder of the all-solid waste cementitious material is taken from Xinjiang Da'an Special Steel Company, and the slag powder and chemical gypsum are taken from Hanxing Iron and Steel Company. The total solid waste cementitious material is calculated by weight: steel slag powder 35%-40%, chemical Gypsum and slag powder mixed powder 60%-65%. The raw material characteristic parameters of the all-solid waste cementitious material are as follows: the chemical composition of steel slag is shown in Table 5, and the alkalinity coefficient

[0058] Table 5: Chemical composition of steel slag from Xinjiang Hami Da'an Special Steel Company

[0059]

[0060] The particle size distribution curve of steel slag powder is shown in Figure 4 , the mineral composition of slag is shown in Table 6, quality factor Activity coefficient The particle size distribution curve of slag powder is shown in Figure 5 , see Table 7 for chemical gypsum mineral composition, SO ...

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Abstract

The invention provides an all-solid-waste cementing material for fine tailing filling and a preparation method, and belongs to the technical field of tailing filling mining. According to the material,steel slag is used for replacing clinker or lime or other alkaline materials, the synergistic and self-excitation action mechanism of steel slag and chemical gypsum is utilized, no artificial material is added, and the cementing material is prepared from, by weight, 35%-50% of steel slag, 15%-25% of chemical gypsum and 25%-50% of slag. The cementing material is high in utilization rate of low-quality solid waste, wide in source, low in material cost and suitable for preparation of fine tailing filling slurry for filling method mining, the fine tailing filling body has micro-expansibility, roof contact of a filling stope is facilitated, and therefore the stability of the filling stope is improved.

Description

technical field [0001] The invention relates to the technical field of tailings filling and mining, in particular to an all-solid waste cementitious material used for fine tailings filling and a preparation method thereof. Background technique [0002] The mining process of filling method is complicated, the production capacity is low, and the mining cost is high. It is generally used for the mining of precious metal and non-ferrous metal resources. As my country's implementation of resource development and environmental protection has become increasingly stringent and faced with more difficult-to-mining ore bodies such as deep burial, flooding and high stress, the application field of filling mining method has been promoted and expanded. Not only has the proportion of filling mining in non-ferrous gold mines gradually increased, but it has also been extended to iron ore and coal mining. Iron ore fill mining is economically inefficient due to the low value of iron metal and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21
CPCC04B7/21Y02P40/10
Inventor 温震江吴凡杨晓炳巴蕾高谦韦寒波郭斌胡亚军涂光富
Owner UNIV OF SCI & TECH BEIJING
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