Prepn process of iron red with salfated roasted dreg of sulfur containing aurin ore

Abstract

The preparation process of iron red with sulfated roasted dregs of sulfur containing aurin ore includes the following steps: 1. adding 30-60 % concentration sulfuric acid and roasted dregs in the weight ratio of 1 to 2-10 via stirring, adding co-solvent in 0.01-1 time the weight of roasted dregs, reacting at 60-100 deg.c for 1-6 hr, and filtering to obtain filtrate and filter residue; 2. neutralizing the filtrate with ammonia water, controlling pH 1-2, adding ammonia water at 50-90 deg.c to precipitate partial iron ion and adding flocculant; and 3. washing the obtained precipitate, drying, calcining at 300-700 deg.c and grinding to required fineness to obtain iron red. The present invention has the advantages expanded iron red preparing material range, raised tail ore resource utilization, raised post gold extracting efficiency, lowered power consumption, and lowered environmental pollution.

Description

technical field [0001] The invention relates to a technology for recycling, reducing and harming industrial solid waste, in particular to a method for preparing iron red from leaching solution after strengthening acid dissolution of sulfur-containing gold concentrate sulfated roasting slag, The method of comprehensive utilization of iron element is carried out to reduce its pollution to the environment. Background technique [0002] In the prior art, iron red is a very important chemical pigment or magnetic material used in industry. For example, patents CN1102626A and CN1177572A generally use ferrous sulfate heptahydrate, a by-product of titanium dioxide production, pickling solution, electrolytic anode slime, sulfuric acid slag or iron concentrate as raw materials, and in the presence of iron sheets, use oxidation method to prepare iron red , The disadvantage of this method is that high-quality iron sheets are used as raw materials, which is easy to cause shortage of raw ...

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Problems solved by technology

Such as patent CN1102626A, CN1177572A, generally use ferrous sulfate heptahydrate, a by-product of titanium dioxide production, pickling solution, electrolytic anode slime, sulfuric acid slag or iron concentrate, etc. as raw materials, and prepare iron red by oxidation method in the presence of iron sheet , the disadvantage of this method is that high-quality iron sheets are used as raw materials, which may easily cause a shortage of raw materials or a high price of raw materials

In addition, in the enhanced acid dissolution of sulfur-containing gold concentrate sulphated roasting slag (application number 200410067020.7), the method for improving the leaching rate of gold and silver by acid leaching slag is proposed through enhanced acid leaching; the conventional utilization process of acid leaching slag is through Gold extraction by cyanidation, the content of ferric oxide, iron ferric oxide, lead and arsenic in the cyanide slag of gold extraction is relatively high, some of which are prepared by magnetic separation to produce inferior iron red, and some are pulled by cement plants to make auxiliary materials, because of high temperature combustion Release a large amount of polluting gases such as sulfur dioxide and arsenic trioxide, polluting the atmosphere

Some are piled up near the mine, which is easy to cause spontaneous combustion and pollute the atmosphere; at the same time, the harmful cyanide ions and metal ions contained in the cyanide slag are also easy to flow into the water or soil, causing environmental pollution, so it is necessary to deal with it. Turning waste into treasure

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