202471· Abstract Based on the composition characteristics of carbide slag and the application of polyvinyl chloride, a method of preparing calcium carbonate with microstructure and nanostructure by using carbide slag as a raw material and ammonium chloride as a leaching agent was proposed.
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121· Steel slag and calcium chloride were mixed with copper slag (from Tongling Nonferrous Metals Ltd.) in a ball mill for 6 h. To explore the feasibility of synchronizing chlorination and reduction, excessive graphite (30 %) was added to some samples.
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American Concrete Institute
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Generally, basic oxygen furnace (BOF) slag is high in calcium (Ca) but low in V. Ca content and its chemical nature can prevent V leaching. This study presents a potential two-stage leaching process for Ca and V from BOF slag. The method is environmentally friendly using low temperatures and enabling leachate recycling.
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125· Every day you probably use a steel industry byproduct, slag, without realizing it. Slag is a common construction material in the building of roadways, bridges and buildings. The ancient Romans used slag to build the Appian Way 2000 years ago.
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The chemical composition of a slag varies considerably depending on the composition of the raw materials in the iron production process. Silicate and aluminate impurities from the ore and coke are combined in the blast furnace with a flux which lowers the viscosity of the slag. In the case of pig iron production, the flux consists mostly of a mixture of limestone and forsterite or in some
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The process comprises the steps of inputting hydrochloric acid and limestone into a reaction tank for neutralization reaction according to a certain proportion, heating a calcium chloride which is subjected to reaction, evaporating water, cooling, and …
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125· Slag is not a waste product, but rather an intentional byproduct or co-product of ironmaking and steelmaking processes. The molten slag …
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219· This study presents a clean process for recycling rare-earth molten salt electrolytic slag via fluorine fixation roasting using calcium oxide and calcium chloride and hydrometallurgical hydrochloric acid leaching.
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The analysis and observations in this article offer a new resource for SCM development, describe a basis for using metallurgical waste slag as a cementitious material for CLSM preparation, and offer a strategy for reducing the environmental problems associated with the treatment of metallurgical waste.
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In the calcium chloride process, calcium hydroxide is reacted with ammonium chloride, forming ammonia gas and calcium chloride solution. After purification, this solution is reacted with sodium carbonate to form calcium carbonate precipitate and sodium chloride solution as illustrated in …
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20111010· The treatment of wastewater and fluoride mostly by the addition of calcium chloride (CaCl 2) results in the production of a nearly …
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113· Calcium carbide residue and solid waste (such as granulating slag, contaminated soil, aluminium ore mining waste, furnace slag, lead-zinc residue, pulverized coal fly ash and iron mine beneficiation residue) are related to the co-process of solid waste by kiln.
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… slag in the presence of calciumchloride and … slag, which is the waste product of the process … The production of stannous chloride and its separation from the molten slag …
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The invention discloses a novel production technique for preparing calcium chloride from carbide slag. The technique comprises the following steps: 1) pouring 25-33% technical hydrochloric …
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51· Coal is the dominant fuel in China to provide primary energy, and 70% of polyvinyl chloride is produced from coal-based CaC2. CaC 2 reacts with water to produce acetylene and calcium carbide slag (CCS) as a solid waste for polyvinyl chloride production. Approximate 40 million tons of dry CCS are generated annually in China, among which only a …
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1015· Abstract Calcium hydroxide is a widely used bulk chemical, and traditional limestone calcination to prepare hydrated lime emits large amounts of CO2. Calcium carbide slag (CCS) is a waste residue with calcium hydroxide as the main component emitted by the PVC industry, which can be directly used to prepare calcium hydroxide.
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201661· The process requires a lot of washing water to remove ammonium and calcium chloride remnants from the slag residue and the calcium carbonate product. In order to minimise the need for solvent make-up and to clean up the spent water, a reverse osmosis (RO) unit is employed (Table 3).
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The limestone-hydrochloric acid process reacts limestone with hydrochloric acid to produce calcium chloride and is useful for producing high purity food-grade products. The natural brine process concentrates and purifies brines from salt lakes, removing magnesium with lime and sodium chloride through evaporation.
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202471· Based on the composition characteristics of carbide slag and the application of polyvinyl chloride, a method of preparing calcium carbonate with micro…
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1015· Abstract Calcium hydroxide is a widely used bulk chemical, and traditional limestone calcination to prepare hydrated lime emits large amounts of CO2. Calcium carbide slag (CCS) is a waste residue with calcium hydroxide as the main component emitted by the PVC industry, which can be directly used to prepare calcium hydroxide.
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Calcium chloride was added as a calcium source in the mineralization process. Integration of absorption and mineralization defined as a single process was …
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201661· The process requires a lot of washing water to remove ammonium and calcium chloride remnants from the slag residue and the calcium carbonate product. In order to minimise the need for solvent make-up and to clean up the spent water, a reverse osmosis (RO) unit is employed (Table 3).
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121· Abstract Waste carbide slag (WCS) is a typical industrial solid waste with high calcium content, which shows highly potential in preparation of CaCO3 by CO 2 mineralization technology. This study demonstrated the feasibility of efficient calcium leaching from WCS using ammonium sulfate ( (NH4) 2 SO 4) under mild conditions (≤40 °C，0.1 MPa).
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MANUFACTURING PROCESS Calcium chloride is produced by OxyChem using the natural brine process. Aqueous brine is extracted from natural underground deposits by a third-party company. This company adds lime to the brine to precipitate magnesium as magnesium hydroxide, which is removed by filtration and clarification. The remaining calcium chloride-rich brine is transferred …
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