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Carbide slag purifying and recycling system and method

A technology of calcium carbide slag and recovery methods, which is applied in the direction of carbide and calcium carbide, can solve the problems of wasting calcium resources and pollution, and achieve the effects of reducing production costs, raw material costs, and fuel costs

Inactive Publication Date: 2016-07-06
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of carbide slag is degraded and used, which greatly wastes calcium resources and brings serious pollution at the same time

Method used

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  • Carbide slag purifying and recycling system and method
  • Carbide slag purifying and recycling system and method
  • Carbide slag purifying and recycling system and method

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Embodiment 1

[0038] This embodiment provides a calcium carbide slag purification and reuse system, such as figure 1 As shown, it includes a raw material pretreatment unit, a gas melting furnace, an acetylene generating unit, and a carbide slag purification unit connected in sequence; wherein, the carbide slag outlet of the carbide slag purification unit and the powdered calcium-based raw material of the raw material pretreatment unit The entrance is connected;

[0039] The raw material pretreatment unit is provided with a powdery calcium-based raw material inlet, a powdery iron raw material inlet, a powdery carbon-based raw material inlet and a mixed raw material outlet.

[0040] The raw material pretreatment unit is provided with a stirring device for uniformly mixing powdered calcium-based raw materials, powdered iron raw materials, and powdered carbon-based raw materials.

[0041] The gas melting furnace is provided with a powdery mixed raw material inlet 21, a flue gas outlet 22, an o...

Embodiment 2

[0044] This embodiment provides a method for purifying and recovering calcium carbide slag using the system described in Embodiment 1, such as image 3 shown, including the following steps:

[0045] (1) In the raw material pretreatment unit, mix the dried semi-coke, lime and iron raw materials evenly, semi-coke:lime:steel scrap=0.63:1:0.009 (mass ratio), after roasting and screening, put into In the stirring device of the raw material pretreatment unit, mix evenly;

[0046](2) The powder mixed raw material is fed from the upper part of the gas-fired melting furnace, oxygen is introduced from the oxygen-containing gas inlet, and natural gas is fed into the gas inlet. When the temperature of the material rises to about 1700-2200°C, the calcium carbide formation reaction occurs, and the reaction time is 25 minutes. During the production process of calcium carbide, there are a lot of side reactions, including silicon dioxide in the raw material and carbon in the raw material. It...

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Abstract

The invention relates to a carbide slag purifying and recycling system and method. The system comprises a raw material preprocessing unit, a fuel gas fusion furnace, an acetylene generation unit and a carbide slag purifying unit which are sequentially connected. The carbide slag outlet of the carbide slag purifying unit is connected with a powdery calcium-based raw material inlet of the raw material preprocessing unit. The raw material preprocessing unit is provided with the powdery calcium-based raw material inlet, a powdery iron raw material inlet, a powdery carbon-based raw material inlet and a mixed raw material outlet. Carbide is produced through the fuel gas fusion furnace, the silicon iron generation mechanism is combined with carbide production, impurity silicon dioxide in carbide slag is completely converted into by-products silicon iron, purified carbide can be recycled, and the carbide production cost is substantially reduced. In addition, because of conversion of silicon impurities, it can be effectively avoided that a large amount of silicon carbide deposits and the bottom of the furnace is elevated, and it is avoided that devices such as furnace wall iron shells, material flow nozzles and cooling pots are damaged.

Description

technical field [0001] The invention relates to a calcium carbide slag purification and reuse system and a purification and reuse method, belonging to the technical field of carbide slag extraction. Background technique [0002] Due to the large-scale use of calcium carbide in my country, it produces a large amount of powdered carbide slag while producing acetylene. The main component of calcium carbide slag is Ca(OH) 2 At present, it is commonly used in building materials and cement production, and the cement industry is one of the surplus industries in my country, and only a small amount is used as a desulfurizer in power plants. A large amount of calcium carbide slag is degraded and used, which greatly wastes calcium resources and brings serious pollution at the same time. How to effectively remove impurities in calcium carbide slag so that it can be used efficiently has become one of the urgent problems for calcium carbide production enterprises. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/32C22C33/04C22C38/02C01B32/942
CPCC22C33/04C22C38/02
Inventor 张顺利贾懿曼刘维娜张佼阳路丙川郑倩倩丁力吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD