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Heavy metal curing agent and method for tungsten tailing resource utilization

A curing agent and heavy metal technology, which is applied in the fields of solid waste recycling and environmental protection, can solve the problems of complex tungsten tailings mineral composition, few comprehensive utilization methods, and low utilization rate, so as to reduce energy and resource consumption and protect the environment. Significant benefits and socio-economic benefits, the effect of reducing the amount of use

Pending Publication Date: 2021-07-23
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the technical deficiencies such as excessive cement consumption in the cement solidification method, complex mineral composition of tungsten tailings, fine particle size, low utilization rate and few comprehensive utilization channels, the present invention proposes to use tungsten tailings with fine particle size and potential activity. Features, using tungsten tailings as raw materials, activated tungsten tailings prepared by chemical activation process, developed a kind of activated tungsten tailings and traditional curing agent cement as the main raw materials, and then added lime and sodium hydroxide as auxiliary agents The heavy metal curing agent not only increases the added value of tungsten tailings, realizes the large-scale resource utilization of tailings, opens up the application field of tungsten tailings, but also significantly reduces the consumption of cement in the process of cement curing heavy metals; the overall preparation The process is green and environmentally friendly, with important environmental and social economic benefits

Method used

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  • Heavy metal curing agent and method for tungsten tailing resource utilization
  • Heavy metal curing agent and method for tungsten tailing resource utilization
  • Heavy metal curing agent and method for tungsten tailing resource utilization

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 1. Preparation of activated tungsten tailings. Dry the tailings and weigh 3.5kg of tungsten tailings. Based on the quality of tungsten tailings, add an activator, the amount of which is: 0.1% sodium hexametaphosphate, 0.1% stearic acid, 0.3% hemihydrate gypsum and 0.1% polyorganic polyhydric alcohol. Add in aqueous solution. After the tungsten tailings and activator are stirred evenly, the tailings are ground with a mill for 30 minutes to obtain activated tungsten tailings.

[0029] 2. The preparation method of curing agent. By weight, the composition of the curing agent is: 50% activated tungsten tailings, 5% lime, 5% sodium silicate and 40% cement. After the curing agent is mixed evenly, it is heated and dried at 100°C for 4 hours, and finally the curing agent is used Ball mill grinding until the specific surface area exceeds 300m 2 / kg.

[0030] 3. Heavy metal ion solidification method. Weigh 450g of curing agent, based on lead metal ions, weigh the weight of l...

Embodiment 2

[0033] 1. Preparation of activated tungsten tailings. Dry the tailings and weigh 3.5kg of tungsten tailings. Based on the quality of tungsten tailings, add an activator, the amount of which is: 0.1% sodium hexametaphosphate, 0.1% stearic acid, 0.3% hemihydrate gypsum and 0.1% polyorganic polyhydric alcohol. Add in aqueous solution. After the tungsten tailings and activator are stirred evenly, the tailings are ground with a mill for 30 minutes to obtain activated tungsten tailings.

[0034] 2. The preparation method of curing agent. By weight, the composition of the curing agent is: 70% activated tungsten tailings, 5% lime, 5% sodium hydroxide and 20% cement. After the curing agent is mixed evenly, it is heated and dried at 100°C for 4 hours, and finally the curing agent is used Ball mill grinding until the specific surface area exceeds 300m 2 / kg.

[0035]3. Heavy metal ion solidification method. Weighing 450g curing agent, in terms of lead metal ions, weighing lead nitr...

Embodiment 3

[0038] 1. Preparation of activated tungsten tailings. Dry the tailings and weigh 3.5kg of tungsten tailings. Based on the quality of tungsten tailings, add an activator, the amount of which is: 0.1% sodium hexametaphosphate, 0.1% stearic acid, 0.3% hemihydrate gypsum and 0.1% polyorganic polyhydric alcohol. Add in aqueous solution. After the tungsten tailings and activator are stirred evenly, the tailings are ground with a mill for 30 minutes to obtain activated tungsten tailings.

[0039] 2. The preparation method of curing agent. By weight, the composition of the curing agent is: 60% activated tungsten tailings, 10% lime, 5% sodium hydroxide and 25% cement. After the curing agent is mixed evenly, it is heated and dried at 100°C for 4 hours, and finally the curing agent is used Ball mill grinding until the specific surface area exceeds 300m 2 / kg.

[0040] 3. Heavy metal ion solidification method. Weighing 450g curing agent, in terms of lead metal ions, weighing lead ni...

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Abstract

The invention discloses a heavy metal curing agent and method for tungsten tailing resource utilization. The curing agent comprises, by weight, 30-70% of activated tungsten tailings, 5-20% of lime, 5-10% of sodium silicate and 20-40% of cement. The curing agent is uniformly mixed, is heated at 90-110 DEG C for 4-6 hours for drying, and finally the curing agent is ground by using a grinding machine until the specific surface area exceeds 300 m<2> / kg. A method for activating the tungsten tailings is characterized in that by taking the mass of the tungsten tailings as a standard, the dosage of an activating agent is 0.01-0.5%; and the activating agent is added in the form of a solution and comprises sodium hexametaphosphate, stearic acid, semi-hydrated gypsum and polymerized organic polyol, the mixture is mixed and ground for a certain time through a mill, and activated tungsten tailings are obtained. The curing agent is prepared from the mine activated tungsten tailings, the lime, the sodium silicate and the cement, the preparation process is short in time consumption and low in energy consumption, the consumption of the cement can be effectively reduced, and the consumption of energy and resources is reduced.

Description

technical field [0001] The invention belongs to the fields of solid waste resource utilization and environmental protection, and in particular relates to a heavy metal curing agent and a curing method for resource utilization of tungsten tailings. Background technique [0002] my country is a country rich in tungsten resources, and its proven tungsten reserves rank first in the world. The raw ore grade of tungsten ore in my country is generally low, ranging from 0.1% to 0.8%, so a large amount of tailings will be produced during the beneficiation process, accounting for more than 90% of the raw ore. The amount of tungsten tailings discharged in my country every year is more than 15 million tons, and the stockpiles are as high as more than 100 million tons, which occupies a large amount of land resources and has certain potential harm to the environment. [0003] The generation and stockpiles of tungsten tailings are huge, and it is urgent to find a suitable way of large-sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/36C04B7/38C04B28/02
CPCC04B7/24C04B7/36C04B7/38C04B28/02C04B2111/00784C04B22/085Y02P40/10
Inventor 匡敬忠于明明邱廷省
Owner JIANGXI UNIV OF SCI & TECH