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.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
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 ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com