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A method for preparing metal arsenic block

A technology for metal arsenic and simple arsenic, which is applied in the intersecting fields of metallurgical engineering and environmental engineering, can solve the problems of inefficient and environmentally friendly production, high toxicity of arsenic oxide, and difficulty in storage, so as to eliminate huge safety risks, considerable economic benefits, and sales volume big effect

Active Publication Date: 2017-09-29
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the defect that the accompanying product arsenic oxide in the non-ferrous industry has high toxicity, low sales volume, difficulty in preservation, and inability to produce metal arsenic blocks efficiently and environmentally friendly. The method of the easy-to-preserve metal-type arsenic block is to dissolve and reduce the arsenic oxide into elemental arsenic, then mix the arsenic element with a thermal adhesive, and then make a mold for hot pressing, so that the arsenic element is transformed from amorphous The β-type is converted into the metal-type α-type and bonded into blocks, so as to efficiently obtain metal-type arsenic blocks

Method used

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  • A method for preparing metal arsenic block

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Embodiment 1

[0023] Taking arsenic oxide, an associated product of a non-ferrous smelter in Hunan Province, as raw material, add 10g of arsenic oxide to a 2mol / L hydrochloric acid solution heated to 50°C, and dissolve the arsenic oxide after 0.5h. Add stannous chloride in a molar ratio of n(Sn): n(As) at a ratio of 1. After reacting for 1 hour, filter and wash with black arsenic. After the black arsenic was dried in an oven at 105°C for 4 hours, the polyacrylate was added to the black arsenic at a mass ratio of black arsenic to thermal adhesive of 20:1, mixed and then put into a mold. The thickness of the manufactured module is 0.04m. After the molding is completed, the steel mold is placed in the hot pressing furnace, first pressed to 100Mpa and maintained at the pressure, and then the temperature is rapidly increased to 400°C, and the hot pressing reaction is performed for 1 hour. After the hot pressing is completed, the steel mold is taken out, and the metal arsenic block is obtained aft...

Embodiment 2

[0025] Using arsenic oxide, an associated product of a non-ferrous smelter in Hunan, as raw material, 10g of arsenic oxide was added to a 5mol / L hydrochloric acid solution heated to 70°C, and the arsenic oxide was completely dissolved after 0.5h. Stannous chloride was added in a molar ratio of n(Sn): n(As) at a ratio of 1.2. After the reaction for 1.5 hours, black arsenic was obtained by filtering and washing with water. After the black arsenic was dried in an oven at 105°C for 4 hours, polyurethane was added to the black arsenic at a ratio of 50:1 by mass of the black arsenic to the thermal adhesive. The thickness of the module is 0.05m. After the molding is completed, the steel mold is placed in the hot pressing furnace, first press to 150Mpa and maintain the pressure, and then rapidly increase the temperature to 450°C, and react with hot pressing for 1 hour. After the hot pressing is completed, the steel mold is taken out, and the metal arsenic block is obtained after natura...

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Abstract

The invention discloses a method for preparing a metal arsenic block. The preparation method comprises the following steps: dissolving out arsenic oxide through acid; reducing dissolved-out liquor into an arsenic elementary substance (amorphous-form black arsenic) by use of a reducing agent; and uniformly mixing the amorphous-form black arsenic with a heat adhesive to obtain a mixture, molding and thermally pressing the mixture, so that the black arsenic generates phase change in a thermal pressing process, and is bonded into a block, and therefore, the black arsenic is efficiently converted into the metal arsenic block. The method is simple and environment-friendly in process, not only can eliminate great potential safety hazards caused by storage of the arsenic oxide in enterprises, but also can create considerable economic benefits, and has a relatively high practical value.

Description

Technical field [0001] The invention belongs to the cross field of metallurgical engineering and environmental engineering, and specifically relates to an efficient and environmentally friendly method for preparing alpha metal arsenic blocks. Background technique [0002] Arsenic is a non-metallic element, which is widely associated with various non-ferrous mineral raw materials, such as high-arsenic copper concentrate, and its content is even as high as 20-30%. Part of the arsenic in the raw materials of non-ferrous minerals undergoes a series of chemical reactions in the smelting process to be made into arsenic oxide. Arsenic oxide is highly toxic and harmful to the environment and human body. At present, the demand for arsenic oxide in the market is extremely small, and the imbalance between supply and demand has caused a large amount of unsold stockpiles. Because of its strong toxicity, there are huge safety risks. How to store it safely and form an effective market is a pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B30/04C22F1/16
CPCC22B30/04C22F1/16
Inventor 柴立元蒋国民王庆伟胡明史美清李青竹杨志辉高伟荣
Owner CENT SOUTH UNIV
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