آخرین محصولات

LEACHING PROPERTIES OF SECONDARY LEAD SLAG …

Leaching properties of secondary lead slag 153 (40 mm × 40 mm × 40 mm), after curing for 28 days, were immersed in leaching agent (distilled water, pH = 4 with HNO3), for the test period of 64 ...

Primary and Secondary Smelting Operations

Lead processing and smelting plants work with both primary and secondary lead. Primary lead is mined, separated from ore, and refined into various products, whereas secondary lead is recovered from used objects, such as used lead-acid batteries, for reuse in other products. Smelting is a key process in lead product production, and involves heating lead

Assessment of Leaching Characteristics of Solidified …

Secondary alkaline lead slag is a hazardous waste generated in the recycling process of lead-acid batteries that may be suitable in construction materials. The environmental impact of the use of ...

Leaching properties of secondary lead slag

The aim of the study was to investigate leaching mechanism and behaviour of lead and arsenic from sodium lead slag previously stabilized/solidified in concrete using …

Slag Substitution as a Cementing Material in Concrete: …

Cement is replaced by slag from different steel mills, both blast furnace and ladle furnace slag. The percentages of slag substitution by cement are 30%, 40% and 50% by weight. Mechanical, physical and environmental properties have been evaluated. Compressive and flexural strength have been analysed as the main mechanical properties.

Valorization of secondary copper slag as aggregate and cement

DOI: 10.1016/j.jobe.2022.104567 Corpus ID: 248607953; Valorization of secondary copper slag as aggregate and cement replacement in ultra-high performance concrete @article{Edwin2022ValorizationOS, title={Valorization of secondary copper slag as aggregate and cement replacement in ultra-high performance concrete}, author={Romy …

Assessment of Leaching Characteristics of Solidified Products

Secondary alkaline lead slag is a hazardous waste generated in the recycling process of lead-acid batteries that may be suitable in construction materials. ... This paper has made an effort to partially replace cement by lead slag for M25 grade concrete. Initially chemical constituents of Lead slag and physical properties of cement, GGBS, River ...

Reduction in toxicity and generation of slag in secondary lead …

This paper focuses on the improvement of a secondary lead recycling processing plant, giving special attention to the generation of lead slag.The study was conducted using two different industrial rotary furnaces that together produce three different slag types, which depend on charge composition and lead-containing raw material …

LEACHING PROPERTIES OF SECONDARY LEAD SLAG …

LEAD SLAG STABILIZED/SOLIDIFIED WITH CEMENT AND SELECTED ADDITIVES Sodium lead slag, generated during secondary lead production, is characterized as hazardous waste. The aim of the study was to investigate leaching mechanism and behaviour of lead and arsenic from sodium lead slag previously stabilized/solidified in …

(PDF) Utilisation and leaching behaviour of lead smelting slag …

This paper has made an effort to partially replace cement by lead slag for M25 grade concrete. Initially chemical constituents of Lead slag and physical properties of cement, GGBS, River sand, Quarry dust and coarse aggregates were analyzed. Concrete was casted with 0.45 w/c ratio for M25 grade concrete.

(PDF) Reuse of Slags Containing Lead and Zinc …

Lead slag is produced by the primary and secondary lead industry. The large amount of lead slag discharge causes environmental problems. ... The utilization rate of lead slag in cement clinker is ...

POSSIBILITY OF SECONDARY LEAD SLAG STABILIZATION …

Processing options for stabilization/solidification of secondary lead metallurgical slag into cement matrix with barium hydroxide and gypsum as selected additives due to …

Leaching properties of secondary lead slag …

Secondary alkaline lead slag (SALS), generated during lead–acid batteries recycling, is a hazardous waste due to its high reactivity, solubility, and migration of toxic elements.

Effect of 30% Ground Granulated Blast Furnace, Lead and …

This paper investigates the effects of using Ground Granulated Blast Furnace Slag (GGBFS), Lead Slag (LS) and Zinc Slag (ZS) as replacement for sand on the strength of concrete. Compressive strength, flexural strength, water absorption and density were tested at 14, 28 and 56 days. In this study, a total of 40 concrete samples, including …

Utilization of secondary lead slag as construction material

Pyrometallurgical processing of lead ores generates large amounts of slag which is stockpiled as chunk or granules. Romanian dump heaps of such slag produced in the period 1972–1998, occupy an area…

The climate benefits from cement carbonation are being

The global average for demolition phase duration is used for all cement and is 0.4 years 12. The secondary life for all cement is assumed to be 35 years, which is the estimated secondary useful ...

A review on lead slag generation, characteristics, and utilization

Several researchers have investigated the possibility of using of primary lead slag and secondary lead slag as fine aggregate and coarse aggregates in concrete, as well as its effects on the mechanical properties of concrete (De Angelis and Medici, …

LEACHING PROPERTIES OF SECONDARY LEAD SLAG …

The amount of the secondary lead slag in concrete and proper selection of additives had a significant influence on the properties of S/S waste. Stabilized material had …

Characterization and batch testing of a secondary lead slag by

This work focuses on the slag produced by a secondary lead smelter that operates in South Africa. The major input of the plant is scrap automotive batteries, with a lesser amount of drosses. Some galena concentrate is also processed. Of the waste that is generated, the slag represents the largest quantity and is also the most costly, both …

Optimized potential performance of slag sand in cement …

Cement mortar was prepared at a ratio of 1:3 as per the Indian standard IS:2250-1981. 1:3 grade of cement mortar considered in the proportion of cement: M-sand: Slag sand (C:M:S). An experimental investigation of slag sand was done by preparing a mortar with varying aggregate percentages from 0 to with an interval of 25%.

Impact of waste slag reuse on the sustainability of the secondary lead …

The lead recycling subsystem and cement production subsystem contributed 39.22% and 60.78%, respectively. ... Importantly, the content and chemical form of lead in the waste slag must be strictly controlled, and not all waste slag produced by the secondary lead enterprises can be added to the cement kiln (scenario C) (UNEP, 2003).

Utilization of secondary lead slag as construction material

The lead slag generated from lead smelting and from recycling of secondary lead batteries suggest that this slag can be used as fine and coarse aggregate in the preparation of cement mortar and ...

Utilization of secondary lead slag as construction material

Secondary lead slag, a waste product from battery smelting using CaCO 3 as flux, has been investigated for its use as an admixture and/or aggregate in the …

TIET Digital Repository: Use of Secondary Lead Recycling …

This research investigates the feasibility analysis of secondary lead recycling slag powder in cementitious matrix as a construction material. Three types of …

Assessment of Leaching Characteristics of Solidified Products

Reuse of waste is one of the main principles of sustainable development and circular economy. Secondary alkaline lead slag is a hazardous waste generated in the recycling process of lead-acid ...

Preliminary Study of the Use of a Secondary Lead Smelting Slag …

In this work, the preliminary study about the use of secondary lead smelting slag (SLSS) as an addition to Portland cement is presented. SLSS is a waste from a Colombian secondary lead smelter.

Leaching properties of secondary Lead slag …

Sodium lead slag, generated during secondary lead production, is characterized as hazardous waste. The aim of the study was to investigate leaching mechanism and behaviour of lead and arsenic from ...

A review on lead slag generation, characteristics, and …

Semantic Scholar extracted view of "A review on lead slag generation, characteristics, and utilization" by D. Pan et al. ... The results of the UCS and TCLP indicated that utilization of this type of slag in cement-based applications may be justified with its controlled addition, however, the described application of the slag was disputed …

Cement substitution with secondary materials can reduce …

In this paper we report the maximum potential for cement substitution with secondary materials to reduce CO2 emissions globally (1.3 Gt CO2-eq. in 2018) and on a country-by-country basis.

Waste management strategies for cleaner recycling of spent …

The blocks which are produced by S/S applied slag with cement (slag ratio 25%—B25L and 50%—B50L) are classified as non-hazardous according to USEPA Method. However, the overall toxicity of blocks for B50L is classified as highly acute toxic (TU > 100 class 4). ... The lead slag from secondary lead recycling is in solid form and …

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