Steel slag-cyaniding tailing cementing material as well as preparation method and application thereof

A technology for cyanide tailings and cementitious materials, which is applied in chemical instruments and methods, sustainable waste treatment, solid waste management, etc., can solve problems such as the utilization rate of less than 40%, achieve reuse, reduce production costs, Inexpensive effect

Active Publication Date: 2021-02-26
HEBEI UNIV OF ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Steel slag is one of the main solid wastes produced in the process of steel production. Due to the large amount of molten material discharged after lime is used to extract impurities in steelmaking, its discharge is about 12% to 20% of crude steel output. In recent years my country's annual discharge of steel slag is about 70 to 80 million tons, but its utilization rate is less than 40%

Method used

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  • Steel slag-cyaniding tailing cementing material as well as preparation method and application thereof
  • Steel slag-cyaniding tailing cementing material as well as preparation method and application thereof
  • Steel slag-cyaniding tailing cementing material as well as preparation method and application thereof

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preparation example Construction

[0035] The preparation method of described iron selection waste slag comprises the following steps:

[0036] Step 1. After the original steel slag is carbonized in a concrete carbonization box for 24-72 hours, it is crushed by a jaw crusher, and then ground by a ball mill to a size smaller than 2 mm to form steel slag powder;

[0037] Step 2. Mix steel slag powder and cyanide tailings 1:1, and separate them into iron powder 1 and mixture 1 by dry strong magnetic roller; wherein, the magnetic field strength is 1.5-2T, and the magnetic separator speed is 10-20r / min;

[0038] Step 3. Grind the mixture 1 to 100-200m 2 / kg, divided into: 100~160m by winnowing 2 / kg of coarse slag 1 and 160~200m 2 / kg fine slag;

[0039] Step 4, continue to separate the coarse slag 1 by the dry weak magnetic roller into: coarse slag 2 and iron powder 2; wherein, the magnetic field strength is 50-80mT, and the magnetic separator speed is 10-20r / min;

[0040] Step 5. Mix fine slag and coarse sla...

Embodiment 1

[0047] A steel slag-cyanide tailings cementitious material is composed of the following substances in mass percentage:

[0048]

[0049] The preparation method of the iron selection waste slag comprises the following steps: after the original steel slag is carbonized in a concrete carbonization box for 48 hours, it is crushed by a jaw crusher, and then ground by a ball mill to a size less than 2 mm to form steel slag powder; 1:1 mixing, the mixture is separated into iron powder 1 and mixture 1 by a magnetic field strength of 1.5T, and a magnetic separator with a speed of 10-20r / min. 200m 2 / kg, divided into: 100~160m by winnowing 2 / kg of coarse slag 1 and 160~200m 2 / kg of fine slag; the coarse slag 1 is separated into: coarse slag 2 and iron powder 2 by a dry weak magnetic roller with a magnetic field strength of 50mT and a magnetic separator rotating speed of 15r / min; after mixing the fine slag and coarse slag 2 Grind to 400-800m by vibrating ceramic mill 2 / kg to fo...

Embodiment 2

[0060] A steel slag-cyanide tailings cementitious material is composed of the following substances in mass percentage:

[0061]

[0062]

[0063] The preparation method of described iron selection waste slag comprises the following steps:

[0064] After the original steel slag is carbonized in the concrete carbonization box for 24 hours, it is crushed by a jaw crusher, and then ground by a ball mill to a size less than 2 mm to form steel slag powder; the steel slag powder and cyanide tailings are mixed at a ratio of 1:1, and the mixture is passed through a magnetic field with a strength of 1.8T, the speed of the magnetic separator is 10-20r / min, and the dry-type strong magnetic roller is separated into: iron powder 1 and mixture 1; the mixture 1 is ground to 100-200m 2 / kg, divided into: 100~160m by winnowing 2 / kg of coarse slag 1 and 160~200m 2 / kg of fine slag; the coarse slag 1 is separated into: coarse slag 2 and iron powder 2 by a dry weak magnetic roller with a ...

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Abstract

The invention provides a steel slag cyaniding tailing cementing material as well as a preparation method and an application thereof. The steel slag cyaniding tailing cementing material is prepared from the following substances in percentage by mass: 30 to 60 percent of iron-selecting waste slag, 10 to 20 percent of aerated concrete waste, 15 to 25 percent of carbide slag and 10 to 30 percent of desulfurized gypsum. The method comprises the following steps: calcining the carbide slag, naturally cooling, and grinding; crushing, drying and grinding the aerated concrete waste; and grinding the desulfurized gypsum, and mixing the ground desulfurized gypsum with the iron separation waste residues of the steel slag cyaniding tailings in proportion to prepare the steel slag cyaniding tailing cementing material; and mixing the cementing material with Portland cement to prepare the steel slag cyaniding tailing cement. The preparation method disclosed by the invention is simple and easy to implement, can realize the synergistic utilization of various wastes, improves the additional value of the wastes, reduces the production cost of the cement, and has good social and economic effects.

Description

technical field [0001] The invention belongs to the technical field of metal recycling, and in particular relates to a steel slag-cyanide tailings cementitious material and a preparation method and application thereof. Background technique [0002] Cyanide slag is the waste slag discharged after domestic gold smelting. The national gold industry discharges a large amount of cyanide slag every year. With the continuous development of production, the annual discharge of cyanide slag has increased. Especially in recent years, with the continuous improvement of the production process, the cyanidation method has been widely used, and the corresponding large discharge of cyanidation tailings has brought some serious problems. Whether it is the cyanide tailings of flotation gold concentrate or the whole mud cyanide slag, the common feature is that the particle size of the slag is very fine. More than 99% of the gold mines are less than 350 mesh, and more than 80% of the gold mines...

Claims

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Application Information

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IPC IPC(8): C04B18/16C04B28/04B03C1/02
CPCC04B40/0039C04B28/04B03C1/02C04B2111/00017C04B18/12C04B18/16C04B18/0427C04B18/064C04B18/142C04B18/0463Y02W30/91
Inventor 王长龙叶鹏飞李军高颖尹艺臻张凯帆张亚鹏霍泽坤王绍熙任真真赵高飞
Owner HEBEI UNIV OF ENG
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