The invention relates to a low-grade bauxite positive floatation collecting agent. The collecting agent comprises, by weight, 5-25 parts of gutter oil treating fluid, 65-85 parts of high-iodine fatty acid, 5-8 parts of sodium hydroxide, 0.5-1 part of an MOA emulgator in a mixed preparation manner; and the gutter oil treating fluid is prepared from gutter oil, methyl alcohol or ethyl alcohol, hydroxylammonium chloride and an alkaline solution according to the weight ratio being 5:1:2:1. According to the low-grade bauxite positive floatation collecting agent, the gutter oil is made profitable; pretreatment modification is carried out on the gutter oil, the gutter oil and other agents are compounded to obtain the novel collecting agent, a series of problems such as large agent using amount, difficult foam transportation, poor beneficiation and separation indexes and high cost are solved to a large extent, efficient resource utilization, energy saving, emission reduction, cost reduction and efficiency increasing are facilitated, and the low-grade bauxite positive floatation collecting agent is of great significance in improving comprehensive competitive power of bauxite dressing plants.

Low-grade bauxite positive floatation collecting agent and preparing method thereof

There is provided a method and composition for sequestration of arsenic, the method comprising melting an arsenic-containing material in the presence of iron oxide and glass, and yielding a resulting glass incorporating arsenic. The resulting glass has an arsenic content comprised in a range between 1 and 25% w/w and an iron content comprised in a range between 8 and 20% w/w.

Method and composition for sequestration of arsenic

The invention relates to a method for removing arsenic from smoke containing arsenic and solidifying arsenic. The method comprises the following steps that production of comprehensive recovering of valuable metal such as arsenic, antimony, lead and bismuth from smelting smoke containing arsenic, antimony and lead is conducted, and arsenic accumulation in a system is reduced to enable arsenic to be harmless. According to the method provided by the invention, through normal-pressure alkaline leaching, soluble arsenic in the smoke is removed, after trivalent arsenic in a leaching agent is changed to pentavalent arsenic through catalytic oxidation, a stable solid arsenic mineral is compounded through a lime arsenic precipitation method, and then the solid arsenic mineral is solidified through a cement solidifying mode; and leaching slag is subjected to the processes such as washing, reduction smelting and oxidizing blowing, and then all valuable elements are recycled to the maximum. According to the method, by removing arsenic from smoke and leaving antimony, lead, bismuth and the like in the arsenic removed slag as far as possible, separation of arsenic and the valuable metal and harmlessness can be achieved; the comprehensive using rate of the resources is high, the application range of raw materials is wide, the pollution problem in the extracting process of a traditional technique is solved, and particularly dust generated in the lead-zinc smelting process is avoided, and the advantage of the method is more obvious.

Method for removing arsenic from smoke containing arsenic and solidifying arsenic

The invention relates to a method for carrying out bath smelting concentration on valuable metals in arsenic-containing refractory gold ore. The method comprises the following steps of mixing and blending arsenic-containing refractory gold ore, a copper-containing material and a solvent to obtain a mixture, adding the mixture into high-temperature slag having a certain composition and carrying out oxidation smelting by introducing oxygen so as to produce gold-containing low-grade copper matte by controlling the end point of the oxidation smelting, after arsenic and sulfur are oxidized, enabling the oxidized arsenic and sulfur to enter flue gas, cooling the flue gas, collecting dust to produce As2O3 smoke dust and purifying the SO2-containing flue gas subjected to dust collection for preparation of sulfuric acid. By the method, gold and other non-ferrous metals are effectively concentrated so as to facilitate recovery in the subsequent processes and the recovery rate of gold in low-grade copper matte is above 98%; the main raw material for smelting is refractory concentrate, gold is concentrated from the low-grade copper matte in which the content of copper is less than 10%, a large amount of copper concentrate does not need to be mixed and the mass ratio of copper to gold is small; since the content of copper in smelting slag is small, the copper lost with the slag is also little.

Method for carrying out bath smelting concentration on valuable metals in arsenic-containing refractory gold ore

The invention relates to an innocent treatment method for arsenic containing mixed salt The method comprises the following steps of: (1) uniformly mixing arsenic containing mixed salt and slag or/and cullet, and controlling the content of arsenic in the mixed material at10-48wt% to obtain a mixed material; (2) feeding the mixed material into a furnace, heating to 1150-1250 DEG C, and insulating and melting for 04-24 hours to obtain melt; and (3) pouring the melt to a die to prepare solid or entering into water for water-quenching while the melt is still hot to obtain particle arsenic containing solid The method for treating the arsenic containing mixed salt is free from environmental hidden danger, and free from secondary pollution, and the whole process is simple in flow, short in processing time, simple and convenient to operate, low in energy consumption, and suitable for industrialized production

Innocent treatment method for arsenic containing mixed salt

The invention discloses a treatment method for vitrifying arsenic-alkali residue, aiming at solving the problem of pollution or potential menace of the existing arsenic-alkali residue treatment process on environment The treatment method for vitrifying the arsenic-alkali residue comprises the following steps of: selectively reducing sodium antimonate in the arsenic-alkali residue to metallic antimony by a carbon reducing agent in a molten state and keeping arsenic in the residue in the form of sodium arsenate; and then adding a glass molten solvent in the arsenic-containing residue to form a low-temperature glass phase, discharging the glass phase, and then carrying out water-quenching on the glass phase into broken glass pieces or directly casting the glass phase into a glass ingot in an ingot casting mould, thus facilitating piling up or returning to a pit and land-filling According to the invention, the recovery rate of antimony in the arsenic-alkali residue is greater than 95%, and the content of arsenic in the metallic antimony is less than 3%; and the arsenic-containing glass pieces belong to general solid wastes and can be directly piled up in the open air or land-filled

Treatment method for vitrifying arsenic-alkali residue

The invention discloses a treatment method for a polymetallic alloy formed by arsenic-lead-antimony and noble metal. In order that the polymetallic alloy formed by arsenic-lead-antimony and noble metal is directly prepared to meet the international standard Sb20399.8, the noble metal is enriched in the noble metal alloy. The treatment method comprises the following steps of: carrying out alkalification and deep dearsenification treatment on the polymetallic alloy formed by arsenic-lead-antimony and noble metal; then converting antimony white at low temperature in a special converting furnace; and finally blasting and highly oxidizing lead slagging to obtain the noble metal alloy. According to the treatment method, the antimony directly satisfies the output requirement of antimony white; the energy consumption is low, and the direct yield rate of the noble metal is improved to more than 98%; and the converting and slagging time of residual alloy after removal of arsenic and antimony is shortened within 30 hours, which is reduced by more than 50% compared with the conventional process.

Treatment method for polymetallic alloy formed by arsenic-lead-antimony and noble metal

The invention discloses a method for recovering gold and lead by smelting refractory gold ore and lead-containing waste residue raw materials through an oxygen enrichment molten pool. The method comprises the following steps: uniformly mixing the refractory gold ore, lead-containing materials and a fusing agent, pelleting and drying, so as to obtain granular materials; performing oxidizing smelting on the obtained granular materials through an oxygen bottom blowing furnace to obtain sulphur dioxide smoke gas, lead bullion and high lead skim, and performing reduction smelting on the high lead skim in a reduction furnace to obtain slag and lead bullion; and performing electrolytic refining on the lead bullion to obtain refined lead and gold-bearing anode slime, wherein the gold recovering rate is larger than 99%, the lead recovering rate is larger than 95%, sulphur is removed in the form of the sulphur dioxide smoke gas, and the removing rate reaches 95% above. The slag is used as high-silicon mixed ingredients for cement or construction, after the sulphur dioxide smoke gas is subjected to dust removal to recycle valuable metals, the sulphur dioxide smoke gas is used for preparing acid, resources are sufficiently and comprehensively recycled, and the environmental protection and economy are achieved. The method is simple in operation and low in cost, and the method can be applied to large-scale industrial production.

Method for recovering gold and lead by smelting refractory gold ore and lead-containing waste residue raw materials through oxygen enrichment molten pool

The invention discloses a floating and smelting combined method for air-granulating lead smelting slag and utilizing waste heat and belongs to the field of floating and smelting. Aims at solving the problems that a fuming furnace is high in energy consumption, a dust collection system is complex and pollution is high, the method disclosed by the invention comprises the following steps of: a) conveying, namely conveying lead smelting slag to an air-granulating device; b) carrying out air-granulating on the lead smelting slag to obtain granulated slag; c) vulcanizing and roasting, including the steps of transferring the granulated slag into a vulcanizing reactor and adding a vulcanizing agent and a reducing agent to carry out vulcanization reaction; d) cooling, including the steps of cooling a material after vulcanizing and carrying out water quenching after temperature of the material is reduced to 200 DEG C or below to obtain water-quenched slag; and e) floating and grinding, including the steps of grinding and grading the water-quenched slag to obtain the material with the size of 45mum or below and then floating the water-quenched slag in a floating system to obtain a lead and zinc bulk concentrate. By adopting the floating and smelting combined method disclosed by the invention, roasting raw material does not need to be smashed, conversion rate of lead vulcanization and zinc vulcanization are respectively more than 80% without independent heating, and the floating and smelting combined method disclosed by the invention has the characteristics of good vulcanized product floatation performance, low processing cost, less pollution and high metal recycling rate.

Floating and smelting combined method for air-granulating lead smelting slag and utilizing waste heat

The invention discloses a dressing-smelting combined treatment method for sulfate-containing lead-zinc smelting slags, and belongs to the field of dressing and smelting. For solving the environmental problems caused by the difficult mineral dressing and recycling of lead sulfate and zinc sulfate containing materials and the stockpiling, percolation and leaching and the like of slag charges, the dressing-smelting combined treatment method for sulfate-containing lead-zinc smelting slags comprises the following steps: 1) drying: carrying out heating and drying treatment on slag charges; 2) roasting: adding a reducing agent into the dried slag charges so as to carry out reduction roasting; 3) after the roasting is completed, slowly cooling the slag charges, and after the temperature of the slag changes is reduced to below 200 DEG C, carrying out water quenching on the slag charges so as to obtain water-quenched slags; and 4) grinding and floatation: after the water-quenched slags are subjected to ore grinding and grading, taking a material with the particle size of less than 75 mu m and carrying out flotation separation on the material so as to obtain a lead concentrate and a zinc concentrate. According to the invention, the lead content of the obtained lead concentrate is more than 55%, and the recovery rate is more than 80%, the zinc content of the zinc concentrate is more than 35%, and the recovery rate is more than 75%; and the method disclosed by the invention has the characteristics of low treatment cost, no heavy metal pollution, and high lead and zinc metal recovery rates.

Dressing-smelting combined treatment method for sulfate-containing lead-zinc smelting slags

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