Pyrite nano mineral material and preparation method thereof

Abstract

The invention discloses a pyrite nano mineral material and a preparation method thereof. The pyrite nano mineral material uses pyritic sulfur and sulphide concentrate as raw materials, the mass percent of pyrite in the pyritic sulfur is not smaller than 50%, and the mass percent of the pyrite in the sulphide concentrate is not smaller than 90%. The preparation method comprises the following stepsof: crushing pyritic sulfur ores, sieving with a sieve of 100 meshes to obtain powder or directly selecting the sulphide concentrate with the particle diameter which is smaller than 0.165mm as powder, adding a bonder to the powder, pelletizing and molding to obtain particles with the particle diameter of 1-3mm, calcinating the particles at a temperature of 500-1000DEG C for 0.5-30min under anaerobic conditions, separating gas from solids, condensating the gas, recovering sulfur, and cooling the solids under oxygen isolation conditions to a room temperature to obtain a finished product. The material has the advantages of large specific area, strong magnesium, high chemical reaction activity, simple preparation technology, low cost and wide raw material resources.

Description

1. Technical field [0001] The invention relates to the processing and reuse of mineral resources, in particular to a pyrite nanometer mineral material and a preparation method thereof. 2. Background technology [0002] Pyrite is the main mineral component of pyrite ore (50-95% by mass of pyrite), and is also the main mineral component of polymetallic ore dressing by-product sulfur concentrate and gold ore dressing concentrate powder after gold extraction. Mineral components (pyrite mass percentage content 90%). Pyrite has always been an important raw material for the production of sulfuric acid in my country. At present, there are some problems in the development and utilization of pyrite resources as follows: [0003] 1. In addition to being used for the production of sulfuric acid, pyrite has not been developed for other purposes, and its use is single. With the industrial flue gas, especially the SO in metal smelting waste gas 2 The recycling of sulfur concentrates re...

AI Technical Summary

Problems solved by technology

There have been some research reports on pyrite as an environmental treatment material, but no corresponding products have been formed, especially the processing technology and application technology of pyrite to prepare nanostructured mineral materials need to be developed

[0004] 2. When the content of arsenic in pyrite is too high (As>0.1%), the arsenic that cannot be removed in the sulfuric acid production and purification section will be brought into the conversion section to cause catalyst poisoning in the conversion section, thereby reducing the sulfur conversion rate

[0005] 3. When pyrite is used as raw material to produce sulfuric acid, a large amount of sulfuric acid slag will be produced. In addition to a large amount of iron, it also contains a certain amount of silicon, aluminum, and a small amount of sulfur and heavy metals. Although the sulfuric acid slag has been explored Comprehensive utilization, but due to the existence of harmful impurity elements, its resource utilization rate has not been high

[0006] 4. There are some research reports on the treatment of hexavalent chromium and heavy metal ion-containing wastewater by natural pyrite and pyrrhotite, but natural pyrite and pyrrhotite have high crystallinity, small specific surface area, and low chemical activity. Slow reaction rate, leading to inefficiency in treating wastewater

There are also some reports on the use of nano-iron sulfide to treat wastewater, but the iron sulfide used in the relevant literature is synthesized by microbial mineralization or chemical synthesis, and the source of raw materials is limited, the quality is unstable, or the cost is high, which restricts the use of iron sulfide in water treatment. Scale application in

Images