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A preparation method of composite reducing agent and its method for smelting

A reducing agent and additive technology, which is applied in the field of preparation of composite reducing agents, can solve the problems of poor utilization of low-grade tungsten-molybdenum ore, and achieve the effects of improving reduction efficiency, improving reduction ability, and reducing reaction resistance

Active Publication Date: 2018-12-14
MAANSHAN HUASHENG METALLURGICAL SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of poor utilization of low-grade tungsten-molybdenum ore in the prior art, and provide a method for preparing a composite reducing agent and a method for smelting thereof.

Method used

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  • A preparation method of composite reducing agent and its method for smelting
  • A preparation method of composite reducing agent and its method for smelting

Examples

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Embodiment 1

[0040]The following detailed description of exemplary embodiments of the invention refers to the accompanying drawings which form a part hereof, and while these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it is to be understood that Other embodiments may be implemented, and various changes may be made in the present invention without departing from the spirit and scope of the invention. The following more detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but merely to illustrate and not limit the description of the features and characteristics of the invention, in order to suggest the best mode of carrying out the invention , and are sufficient to enable those skilled in the art to implement the present invention. Accordingly, the scope of the invention is to be limited only by the appended claims.

[0041] Example 1

[0042] A com...

Embodiment 2

[0090] The basic content of this example is the same as that of Example 1, except that the additives also include plastic powder and biomass, and the mass ratio of coke powder, plastic powder and biomass is 5:2:2. Soak the biomass and biomass in the alkaline solution of NaOH and NaCl at 60-80°C, and dry after soaking; after drying, stir the coke powder, plastic powder and biomass at 150-250°C Mixing, so that the plastic powder and biomass and coke powder adhere together, wherein the particles of the plastic powder and biomass are less than 250 mesh. The plastic powder is any one or a mixture of polyethylene, polyoxymethylene, polyamide, polypropylene, polystyrene, polycarbonate, polymethyl methacrylate and polyester. The plastic powder in this embodiment is polypropylene, polystyrene, polycarbonate; the mass ratio of polypropylene, polystyrene, polycarbonate is: 3:1:2. CO and H produced by decomposition of biomass and plastic powder in additives 2 Other reducing gases such a...

Embodiment 3

[0092] The basic content of this embodiment is the same as that of Example 1, except that the reducing agent also includes aluminum powder, and the aluminum powder-300 mesh is 80%, that is, the particles smaller than 300 in the aluminum powder account for 80% ; The aluminum powder is externally prepared, and the aluminum powder accounts for 1.2% of the total mass of modified silicon carbide and modified quartz. The temperature is raised to 1300-1500°C for smelting. In this embodiment, it is 1380°C. The smelting time is 1-3h. The embodiment is 3h, and the reduction process is completed. After cooling to room temperature and crushing, detection and analysis (W, Mo, P content). Among them, the reduction rate of tungsten is 73.1%, and that of molybdenum is 66.9%.

[0093] During the reduction process, the aluminum powder in the composite reducing agent releases a large amount of heat in the process of reducing the oxide, which promotes the fusion of the composite reducing agent a...

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Abstract

The invention discloses a preparation method of a composite reducing agent and a method for smelting the same, belonging to the field of resource utilization of low-grade tungsten-molybdenum ore. In the present invention, the modified silicon carbide, modified quartz and additives are put into a mixer and mixed uniformly, the mixing temperature is 30-40°C, the modified silicon carbide is a mixture of silicon carbide powder and silicon powder, and the modified quartz It is quartz coated with a coating component on the surface, the coating component includes asphalt; the additive includes coke powder. The composite reducing agent prepared by the invention has a good reduction effect on low-grade tungsten-molybdenum ore; the silicon powder coated on the surface of the modified silicon carbide has good reaction performance, and can quickly intervene in the reaction under the promotion of the modified quartz, And react with CaMoO4, CaWO4, modified silicon carbide also produces reducing CO gas during the reaction process, which can improve the reduction efficiency of low-grade tungsten-molybdenum ore.

Description

technical field [0001] The invention relates to the field of resource utilization of low-grade tungsten-molybdenum ore, and more specifically, relates to a preparation method of a composite reducing agent and a method for smelting the same. Background technique [0002] A reducing agent is a substance that loses electrons or has electrons diverted in a redox reaction. The reducing agent itself is reducing and is oxidized, and its products are called oxidation products. The reduction and oxidation reactions proceed simultaneously, that is to say, the reducing agent itself is oxidized to become an oxide while undergoing an oxidation reaction with the reduced substance. Metals are produced by reducing metal oxides in minerals with reducing agents, which can effectively extract metals from metal oxides. [0003] With the increasing consumption of tungsten and molybdenum resources, the mining volume of tungsten and molybdenum mineral resources is gradually increasing; and the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/02C22B34/34C22B34/36
CPCC22B1/2406C22B1/242C22B5/02C22B34/34C22B34/36
Inventor 罗林根王海军凌海涛从俊强盛鹏飞付兵
Owner MAANSHAN HUASHENG METALLURGICAL SCI & TECH DEV
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