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

A technology of sulfuration roasting and gold concentrate, applied in the direction of iron oxide, iron oxide/iron hydroxide, fibrous filler, etc., can solve the problems of rising raw material prices, air pollution, and shortage of raw materials, and increase the utilization of tailings resources efficiency, reduce environmental pollution, and improve efficiency

Inactive Publication Date: 2007-05-02
DONGHUA UNIV +1
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  • Abstract
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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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  • Prepn process of iron red with salfated roasted dreg of sulfur containing aurin ore

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Add 60% sulfuric acid in the reactor with stirrer, start the stirrer to stir, add roasting slag at one time, the weight ratio of roasting slag and sulfuric acid solution is 2:1, and the weight ratio of roasting slag and cosolvent is 1:1, The composition of the co-solvent is 1% sodium EDTA, 30% CuO, 20% Fe 2 O 3 , 40% SiO 2 and 9%Al 2 O 3 . The leaching rate of iron is 100%, and the leaching rate of gold and silver is more than 98% at 80 ℃ temperature for 6 hours. Filter, neutralize the filtrate with ammonia water to pH 1, add flocculant ferric chloride to remove the precipitation, separate the cosolvent, and then add ammonia water at 50°C until the iron ions are completely precipitated. After filtering again, the filtrate is used to recover ammonia water and alkali, and the filter residue is washed, dried and calcined at 300°C. The calcined iron red can be obtained after grinding to reach the particle size required by iron red pigment, and its quality index (see at...

Embodiment 2

[0013] Add 30% sulfuric acid in the reactor with stirrer, start the stirrer to stir, add roasting slag at one time, the weight ratio of roasting slag and sulfuric acid solution is 10:1, and the weight ratio of roasting slag and cosolvent is 50:1, The composition of the co-solvent is 25% sodium EDTA, 1% CuO, 30% Fe 2 O 3 , 60% SiO 2 The reaction temperature is 100 DEG C, the reaction time is 1h, the iron leaching rate is 100%, and the gold and silver leaching rate is over 98%. The extract was filtered, the temperature of the system was brought down to room temperature, and then filtered. The filtrate was neutralized with alkali to pH 1.3, flocculant alum was added, the precipitate was removed, the cosolvent was separated, and then ammonia water was added at 90° C. until the iron ions were completely precipitated. After filtration, the filtrate was used to recover ammonia water and alkali, and the filter residue was washed, dried and calcined at 680°C. The calcined iron red ...

Embodiment 3

[0015] Add 45% sulfuric acid in the reactor with stirrer, start the stirrer to stir, add roasting slag at one time, the weight ratio of roasting slag and sulfuric acid solution is 5:1, and the weight ratio of roasting slag and cosolvent is 100:1, The composition of the co-solvent is 10% sodium EDTA, 2% CuO, 15% Fe 2 O 3 , 50% SiO 2 and 5%Al 2 O 3 The reaction temperature is 60 DEG C, the reaction time is 5h, the leaching rate of iron is 100%, and the leaching rate of gold and silver is over 98%. The extract was filtered, the temperature of the system was brought down to room temperature, and then filtered. The filtrate was neutralized with alkali to pH 1.5, flocculant polyacrylamide was added to remove the precipitation, the cosolvent was separated, and then ammonia water was added at 90° C. to complete the precipitation of iron ions. After filtration, the filtrate was used to recover ammonia water and alkali, and the filter residue was washed, dried and calcined at 500°C...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06C09C1/24
Inventor 李登新寇文胜钟非文彭国敏李志金俎小凤张武学张厚杰
Owner DONGHUA UNIV
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