Preparation method and application of industrial residue additive
A technology of industrial waste slag and additives, which is applied in the field of calcium, iron and sulfur slag treatment in the process of hydrometallurgy, can solve the problems of zinc recovery rate decline and sinking into iron slag, and achieve the effect of environmental protection
Inactive Publication Date: 2015-12-30
SHAANXI UNIV OF TECH
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Problems solved by technology
[0006] In the process of zinc hydrometallurgy, when the zinc sulfate solution passes through non-polluting jarosite to precipitate iron, the neutralizing agent added is usually calcined sand (the calcined product of zinc sulfide, mainly zinc oxide), and the calcined sand is used in the neutralization process In the process, some large particles cannot fully participate in the reaction, causing them to sink into the iron slag, reducing the recovery rate of zinc
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[0015] A preparation method for industrial waste residue additive, comprising the following steps:
[0016] (1) Preparation of calcium iron sulfur slag
[0017] In the process of zinc hydrometallurgy, when the zinc sulfate solution passes through non-polluting jarosite to precipitate iron, a neutralizing agent is added to obtain calcium, iron and sulfur slag; the neutralizing agent is one of limestone powder and carbide slag, so that the The addition amount of the blending agent is 10% of the mass of the calcium-iron-sulfur slag.
[0018] (2) Preparation of a kind of industrial waste residue additive
[0019] Add water, calcium source, aluminum source and coal powder to the calcium-iron-sulfur slag, mix uniformly to form a spherical material with an average particle size of 2mm, and heat the prepared spherical material at 1200°C for 2 hours to obtain the additive. The raw material formula is shown in Table 1.
[0020] Table 1 raw material formula
[0021]
[0022]
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Abstract
The invention discloses a preparation method and application of an industrial residue additive. The preparation method comprises the following steps of during a zinc hydrometallurgy process, and during iron precipitating of a zinc sulphate solution, adding a calcium source neutralizer to obtain calcium-iron sulfide slag; adding water, a calcium source, a aluminum source and pulverized coal into the slag, mixing uniformly, pelletizing, and heat treating to obtain the additive. According to the preparation method and the application of the industrial residue additive provided by the invention, residues are used to prepare the industrial residue additive, so that comprehensive utilization of resources is realized, and the characteristics of low cost and environmental protection are realized.
Description
technical field [0001] The invention relates to an industrial waste slag utilization technology, in particular to a treatment method for calcium, iron and sulfur slag in the process of wet zinc smelting and the use of the obtained product. Background technique [0002] Sulfur-iron-aluminate cement (also known as: iron-aluminate cement) was independently developed by the China Academy of Building Materials Science in the 1970s and 1980s. The mineral composition of clinker is a cementitious material mainly composed of anhydrous calcium sulfoaluminate C4A3S, dicalcium silicate C2S and iron phase. It has excellent characteristics such as low calcination temperature, early strength and high strength, impermeability, frost resistance, and corrosion resistance. [A]. The clinker is usually calcined at 1350±50°C with limestone, bauxite, and gypsum as raw materials, which is about 100°C lower than the firing temperature of Portland cement clinker. [0003] Aluminoferrite cements hav...
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IPC IPC(8): C04B7/32
Inventor 马小玲谭宏斌侯小强桂海平林拉才郭从盛董洪峰王永善李闯
Owner SHAANXI UNIV OF TECH