Curing agent for dry iron tailing stack and preparation method of curing agent

A technology of curing agent and iron tailings, applied in the field of mine safety, can solve the problems of large amount of engineering, low strength of solidified body, large land occupation, etc., and achieves reduction of processing cost and energy consumption, small volume shrinkage, and curing capacity. strong effect

Active Publication Date: 2014-09-10
罗强
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that after the dam is completed, the operating cost is low and the process is simple; the main problems are that the one-time dam construction investment is large, the land occupation is large, and the tailings are in a saturated water state for a long time, which poses a huge safety risk
The advantage of this method is that it does not require high requirements for the tailings pond and does not require drainage facilities. The problem is that it is very difficult to transport the tailings under high-concentration conditions. In fact, the requirements for the venue are also very strict.
However, after using a large amount of finely ground industrial waste residue in the curing agent used in this method, the strength of the solidified body is low, and the compressive strength for 7 days is less than 0.2MPa. The amount of curing agent used is large, and there is still a problem that dry stacking is difficult. Especially in the rainy season in the south, the unsolidified tailings will be muddy again into tailings slurry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: A curing agent for dry stacking of iron tailings is composed of curing agent clinker and an activator, wherein the curing agent clinker accounts for 85wt%, and the activator accounts for 15wt%.

[0023] The basic composition and mass parts of the curing agent clinker are: CaO: 48 parts, MgO 16 parts, SiO 2 : 21 parts, Al 2 o 3 : 8 parts, CaF 2 : 1 part, CaSO 4 : 1 part, the above ingredients account for 95% of the mass composition of the curing agent clinker.

[0024] The raw material of the curing agent clinker is made of dolomite, kaolin, fluorite and gypsum. Among them, fluorite and gypsum are used as mineralizers. The raw material is mixed according to the raw material ratio required for the above clinker, and it is ground for 1 hour to become raw meal powder. Add the methyl cellulose (CMC) solution that accounts for 10% of raw meal powder quality as pelletizing aid, the mass concentration of CMC solution is 0.1%, becomes the raw meal ball of diame...

Embodiment 2

[0025] Embodiment 2: A curing agent for dry stacking of iron tailings is composed of curing agent clinker and activator, wherein the curing agent clinker accounts for 95wt%, and the activator accounts for 5wt%.

[0026] The basic composition and mass parts of the curing agent clinker are: CaO: 46 parts, MgO: 18 parts, SiO 2 : 21 parts, Al 2 o 3 : 9 parts, CaF 2 : 1 part, CaSO 4 : 1 part, the above-mentioned ingredients account for 96% of the mass composition of the curing agent clinker.

[0027] The raw material of the curing agent clinker is mixed with limestone, magnesite, fly ash, fluorite and gypsum, among which fluorite and gypsum are used as mineralizers, and the raw material ratio required for the above clinker is mixed and ground for 1 Hours, become raw meal powder, add the methyl cellulose (CMC) solution that accounts for 10% of raw meal powder quality as pelletizing aid, the mass concentration of CMC solution is 0.5%, becomes the raw meal of diameter 10mm in the ...

Embodiment 3

[0028] Embodiment 3: A curing agent for dry stacking of iron tailings is composed of curing agent clinker and activator, wherein the curing agent clinker accounts for 99wt%, and the activator accounts for 1wt%.

[0029] The basic composition and mass parts of the curing agent clinker are: CaO: 50 parts, MgO: 14 parts, SiO 2 : 23 parts, Al 2 o 3 : 8 parts, 21 parts of CaF, 41 parts of CaSO, the above-mentioned components account for 97% of the mass composition of the curing agent clinker.

[0030] The raw material of the curing agent clinker is made of limestone, waste magnesia-carbon refractory materials, coal gangue, fluorite and gypsum, among which fluorite and gypsum are used as mineralizers, and the ingredients are mixed according to the raw material ratio required for the above clinker, and Grind for 1 hour to become raw meal powder, add HPMC solution accounting for 10% of the mass of raw meal powder as a pelletizing aid, the mass concentration of methyl cellulose (CMC)...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
compressive strengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a curing agent for a dry iron tailing stack and a preparation method of the curing agent, belonging to the technical field of mine safety. The curing agent is composed of curing agent clinker and an excitant, wherein the curing agent clinker comprises the basic components in parts by mass: 46-50 parts of CaO, 12-18 parts of MgO, 20-25 parts of SiO2, 8-12 parts of Al2O3 and 1-2 parts of mineralizing agent. The preparation method comprises the steps of firstly, grinding a CaO and MgO enriched raw material, an Al2O3 and SiO2 enriched raw material and the mineralizing agent; then, feeding the ground powder into a balling dish to prepare curing agent clinker powder; and finally, adding excitant powder into the curing agent clinker powder, stirring and uniformly mixing to obtain the curing agent for the dry iron tailing stack. The curing agent prepared by the invention is strong in curing capacity, relatively low in raw material cost and favorable in large-scale popularization and application prospects.

Description

technical field [0001] The invention belongs to the technical field of mine safety, and in particular relates to a curing agent for dry stacking of iron tailings and a preparation method thereof. Background technique [0002] After the iron ore is crushed, ball milled, and wet-processed, it will produce a low-grade tailings slurry mainly composed of gangue, which accounts for more than 1 times the amount of the original ore. The tailings slurry contains more than 30% of water, and the tailings in the tailings slurry Fine particles, strong water holding capacity, high water content and low comprehensive utilization rate. During the process of stockpiling the tailings pond, the level of the tailings slurry will be higher and higher from the ground, so there is a risk of dam failure and a large amount of cultivated land will be occupied. my country is a big mining country, and more than 90% of the tailings are stored in the upstream dam. In recent years, tailings dam collapse ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/00
Inventor 樊传刚高元宝
Owner 罗强
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap