A method for producing slag micropowder from copper smelting secondary slag

A technology of slag micropowder and secondary slag, applied in cement production and other directions, can solve problems such as large differences and non-compliance with requirements, and achieve the effects of reducing grinding energy consumption, increasing environmental protection benefits, and reducing costs

Active Publication Date: 2017-06-30
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with general steel slag, blast furnace slag, and fly ash, it is quite different, and does not meet the traditional requirements for active materials in cement and concrete

Method used

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  • A method for producing slag micropowder from copper smelting secondary slag
  • A method for producing slag micropowder from copper smelting secondary slag
  • A method for producing slag micropowder from copper smelting secondary slag

Examples

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Effect test

Embodiment 1

[0036] A method for producing slag micropowder from copper smelting secondary slag. The technological process is as follows: the copper smelting secondary slag produced after high-temperature melting, water quenching and rapid cooling granulation, and grinding and magnetic separation to extract iron is naturally dried in the sun to make it After the water content is less than 10%, put it into the oven for drying. The oven temperature is 100°C. After drying, the water content of the copper smelting secondary slag is ≤1%. The dried copper smelting secondary slag is metered and loaded into the grinding equipment for crushing, and finely ground in a ball mill. The amount of grinding aid triethanolamine added is 0.05% of the mass of the dried copper smelting secondary slag. The addition of chemical activator desulfurization gypsum is 4% of the quality of the copper smelting secondary slag after drying, the addition of sodium sulfate is 2% of the quality of the copper smelting second...

Embodiment 2

[0039] A method for producing slag micropowder from copper smelting secondary slag. The technological process is as follows: the copper smelting secondary slag produced after high-temperature melting, water quenching and rapid cooling granulation, and grinding and magnetic separation to extract iron is naturally dried in the sun to make it After the water content is less than 10%, put it into the oven for drying. The oven temperature is 110°C. After drying, the water content of the copper smelting secondary slag is ≤1%. The dried copper smelting secondary slag is metered and loaded into the grinding equipment for crushing, and finely ground in a ball mill. The addition amount of the grinding aid triethanolamine is 0.1% of the mass of the dried copper smelting secondary slag. The addition amount of chemical activator desulfurization gypsum is 5% of the quality of the copper smelting secondary slag after drying, the addition amount of sodium sulfate is 3% of the copper smelting s...

Embodiment 3

[0042] A method for producing slag micropowder from copper smelting secondary slag. The technological process is as follows: the copper smelting secondary slag produced after high-temperature melting, water quenching and rapid cooling granulation, and grinding and magnetic separation to extract iron is naturally dried in the sun to make it After the water content is less than 10%, put it into the oven for drying, the oven temperature is 120°C, and the water content of the copper smelting secondary slag after drying is ≤1%. The dried copper smelting secondary slag is metered and put into the grinding equipment for pulverization, and finely ground in a ball mill. The addition amount of the grinding aid triethanolamine is 0.15% of the mass of the dried copper smelting secondary slag. The amount of chemical activator gypsum added is 6% of the mass of the dried copper smelting secondary slag, sodium sulfate can be replaced by Glauber's salt, and the added amount of Glauber's salt is...

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Abstract

The invention discloses a method for producing superfine slag powder by using copper smelting secondary slag. The method comprises the process steps: melting at a high temperature, water quenching, granulating, levigating, performing magnetic separation, extracting iron, airing and drying the copper smelting secondary slag, filling the slag into grinding equipment for grinding, adding a grinding aid triethanolamine and adding chemical activators such as gypsum, calcium hydroxide and sodium sulfate in the grinding process, levigating until the specific surface area is larger than 400m<2> / kg, thereby obtaining the superfine slag powder. The method has the following advantages that the conventional acid slag with low utilization rate of binding material is successfully prepared into the superfine slag powder which can be used for a cement admixture or a concrete additive; the magnetic separation tailings with a certain fineness are further ground, and one part of chemical activators achieve grinding aiding effects in the grinding process, so that the grinding energy consumption is reduced, and the cost is reduced; and moreover, the chemical additives can be replaced by industrial waste residues, for example, calcium hydroxide is replaced by carbide slag, industrial sodium sulfate is replaced by mirabilite, the cost can be greatly reduced, and the environment-friendly effects are further increased.

Description

technical field [0001] The invention relates to the technical field of slag micropowder production, in particular to a method for making slag micropowder from tailings produced after copper slag beneficiation tailings undergo high-temperature melting, water quenching and rapid cooling, grinding and magnetic separation for iron extraction, and physical and chemical excitation. Background technique [0002] The methods commonly used in the metallurgical industry to produce slag powder include mechanical grinding and chemical activation. After the metallurgical industry waste slag is ground, due to its great activity potential, its particle size effect, micro-aggregate effect and strength effect can be used to improve the workability, density and pore structure of concrete, thereby producing high-strength and high-strength concrete. Performance concrete is the most effective material to replace silica fume to prepare high-strength and high-performance concrete, and the slag fin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/21
CPCY02P40/10
Inventor 杨志强孔令军芦越刚马永峰马晓东樊昱刘小刚高晓婷王乃弘董政武王辉张娟苏玉娟
Owner JINCHUAN GROUP LIMITED
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