Process for preparing sulfuric acid by utilizing copper-smelting flue gas

A technology for copper smelting and flue gas is applied in the field of preparing sulfuric acid, which can solve the problems such as the inability to effectively balance the reaction oxygen-sulfur ratio and production negative pressure, and achieve the effects of increasing the processing capacity of mineral materials and sulfuric acid output and saving production costs.

Inactive Publication Date: 2018-09-07
山东方泰循环金业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to provide a process for preparing sulfuric acid from copper smelting flue gas, so as to solve the problem in the prior art that the reaction oxygen-sulfur ratio cannot be effectively balanced and the production negative pressure

Method used

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Embodiment 1

[0017] The technique of utilizing copper smelting flue gas to prepare sulfuric acid described in this embodiment comprises the following steps:

[0018] (1) Copper smelting is carried out according to the prior art process, and the matte obtained by smelting is carried out to conventional blowing treatment, and the blister copper, slag and flue gas obtained are collected respectively;

[0019] (2) Collect the above-mentioned flue gas, obtain flue dust and sulfur dioxide flue gas through conventional sedimentation treatment, and return the obtained flue gas to the smelting furnace for reuse, while the sulfur dioxide flue gas is cleaned and purified by electric dust collector and empty tower to remove the dust entrained in the flue gas , and then demisted by an electric demister, and dried with concentrated sulfuric acid to remove moisture in the flue gas to obtain dry sulfur dioxide gas;

[0020] (3) Convert the obtained sulfur dioxide gas into industrial sulfuric acid by using...

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Abstract

The invention belongs to the technical field of acid production by copper smelting, specifically relates to a process for preparing sulfuric acid by utilizing copper-smelting flue gas, and more specifically relates to a process for preparing the sulfuric acid by supplementing liquid oxygen into a sulfuric acid drying tower. The process for preparing the sulfuric acid by utilizing the copper-smelting flue gas provided by the invention effectively solves the problem of unbalanced oxygen-sulfur ratio in a drying tower due to excessively high concentration of SO2 in the drying tower through a manner of supplementing the liquid oxygen into the sulfuric acid drying tower in the process of conversion. Compared with a production manner of supplementing air to control the oxygen-sulfur ratio in theprior art, the process for preparing the sulfuric acid by utilizing the copper-smelting flue gas provided by the invention effectively balances the pressure conditions of a smelting system and an acid preparation system under the condition of guaranteeing the balance of the oxygen-sulfur ratio in a reaction, effectively increases the treatment amount of mineral materials and the yield of the sulfuric acid in a smelting system, and saves production cost.

Description

technical field [0001] The invention belongs to the technical field of copper smelting acid production, and specifically relates to a process for preparing sulfuric acid by using copper smelting flue gas, and more specifically relates to a process for preparing sulfuric acid by adding liquid oxygen to a sulfuric acid drying tower. Background technique [0002] Copper smelting includes four processes: smelting, blowing, anode refining and electrolytic refining. In the smelting step, matte copper is produced through an oxygen-enriched molten pool smelting furnace, which is further blown and oxidized in a blowing furnace to produce blister copper. Shandong Fangtai Circular Gold Industry Co., Ltd. uses all kinds of gold-bearing waste slag and complex and difficult-to-handle low-grade gold concentrate as the main raw materials, and at the same time mixes copper concentrate, and adopts an oxygen-enriched double molten pool smelting device-that is, the oxygen-enriched side Combined...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/74
CPCC01B17/74
Inventor 刘宏伟高玉民张绍志于斌芳罗永军杨润霞
Owner 山东方泰循环金业股份有限公司
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