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Arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ores

A technology of desulfurization device and sulfur metal, which is applied in the field of arsenic and desulfurization devices for arsenic-containing and sulfur-containing metal ores, and can solve problems such as difficulty, large investment, and complicated process flow

Inactive Publication Date: 2020-10-30
尚明东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Oxidation pretreatment processes mainly include gasification, pressurized oxidation, bacterial oxidation, chemical oxidation such as Cl2, HNO3, etc. Among them, gasification is a new and effective oxidation pretreatment process, and the main equipment of the new process gasification includes rotary Kiln and heating, dust removal equipment, etc., but there are large-scale and corrosion-resistant equipment, the process flow is complex, the investment is large, and it is operated under high temperature and pressure, which requires strict production technology management. Industrially implemented Difficult and other technical issues

Method used

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  • Arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066]This embodiment is mainly applied to copper-gold ore with high arsenic content, and it is required that the arsenic content and sulfur content in the clinker obtained should be low; the method is as follows:

[0067] After being ground into copper-gold ore powder, the copper-gold ore powder, coke and sodium phosphite are put into a twin-shaft mixer according to the weight ratio of 95%, 2%, and 3%, and stirred to form a mixed material;

[0068] Then it is sent to the first silo through the belt conveyor, and then the mixed material is sent to the rotary kiln through the first conveying device, and is dried under 28 standard atmospheric pressure, and the burner is used to cooperate with the gas source and the fan. Combustion is generated for heating, the drying temperature is 250 degrees, and the drying time is 2 hours, and the crystal water in the copper-gold ore powder is removed;

[0069] After drying, pre-reduction treatment is carried out, and the burner continues to ...

Embodiment 2

[0074] This embodiment is mainly used in the clinker that requires low arsenic content but high sulfur content. This is because the high sulfur content of copper concentrate helps the fluidity of the furnace. For this special Requirements, adjust the method as follows:

[0075] After the copper-gold ore containing arsenic and sulfur is ground into copper-gold ore powder, the copper-gold ore powder, coke and sodium phosphite are put into a twin-shaft mixer according to the weight ratio of 95%, 2% and 3% to form a uniform mixture. material;

[0076] Then it is sent to the first silo through the belt conveyor, and then the mixed material is sent to the rotary kiln through the first conveying device, and is dried under 28 standard atmospheric pressure, and the burner is used to cooperate with the gas source and the fan. Combustion is generated for heating, the drying temperature is 250 degrees, and the drying time is 1 hour to remove the crystal water in the copper-gold ore powde...

Embodiment 3

[0125] After the copper-gold ore containing arsenic and sulfur is ground into copper-gold ore powder, the copper-gold ore powder, coke and sodium phosphite are put into a twin-shaft mixer according to the weight ratio of 95%, 2% and 3% to form a uniform mixture. material;

[0126] Then it is sent to the first silo through the belt conveyor, and then the mixed material is sent to the rotary kiln through the first conveying device, and is dried under 30 standard atmospheric pressure, and the burner is used to cooperate with the gas source and the fan. Combustion is generated for heating, the drying temperature is 250 degrees, and the drying time is 1.5 hours to remove the crystal water in the copper-gold ore powder;

[0127] After drying, pre-reduction treatment is carried out, and the burner continues to heat to form a multi-stage temperature zone in the rotary kiln. When the temperature reaches 500 degrees, the pre-reduction treatment starts, and the time is 1.5 hours;

[012...

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Abstract

The invention relates to the technical field of arsenic removal and desulfurization, and discloses an arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containingmetal ores. According to the device, through the arrangement of each conveying device, a material can be transported conveniently, so that the working efficiency of the device is higher; through thearrangement of a cooling mechanism, the overburnt material can be cooled in time and is conveniently fed into a second stock bin to be stored; through the arrangement of cyclone dust collectors and apulse dust collector, reaction gas can be converted into arsenic trioxide powder and sulfur powder to the maximum extent to be separated out respectively; and through the arrangement of an induced draft fan, hot flue gas inside a rotary kiln can be extracted. The method can have a better treatment effect for the arsenic-containing and sulfur-containing copper-gold ore powder through three-stage heating of drying, pre-reduction and gasification decomposition and the use of sodium phosphite serving as a catalyst compared with a traditional two-stage antipyretic treatment function.

Description

technical field [0001] The invention belongs to the technical field of arsenic removal and desulfurization, and in particular relates to an arsenic removal and desulfurization device and method for metal ores containing arsenic and sulfur. Background technique [0002] Metals that occupy an important position in the national economy include copper and gold. Copper is a national strategic resource. According to statistics, more than 70% of refined copper in the world is produced through pyrometallurgy. However, copper concentrates containing group 15 elements (As, Sb, Bi) are still a big challenge for the pyrometallurgical process. Arsenic is a sulfur-loving element. There are more than 300 known arsenic-containing minerals, most of which are mixed in gold, copper, lead, zinc, tin, nickel, and cobalt ores in the form of sulfides. In 15% of the world's copper ore resources, the mass ratio of As / Cu reaches 1 / 5, that is, mining 1 ton of copper correspondingly brings out more th...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B1/26C22B15/00C22B11/00C01B17/06C01G28/00B01D50/00
CPCC22B1/02C22B1/26C22B15/0013C22B15/0021C22B11/00C01B17/06C01G28/005B01D50/20
Inventor 尚明东尚涌尚明汉
Owner 尚明东
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