Process for preparing cement active mixed material and concrete admixture by using tungsten tailings

Abstract

The invention relates to a process for preparing a cement active mixed material and a concrete admixture by using tungsten tailings. The method comprises the following steps: step (1), performing screening on the tungsten tailings; step (2), performing pressure filtration dehydration; step (3), performing drying; and step (4), performing activation to obtain the cement active mixed material. The process for preparing the cement active mixed material and the concrete admixture by using the tungsten tailings provided by the invention has the following beneficial effects: 1, aiming at a traditional activation technology for the tungsten tailings, the process adopts a novel process technology flow; 2, in the preparation process of the cement active mixed material, a main component of a modified activating agent is a polycarboxylate alcohol amine type polymer and has a very good excitation effect on activity of the tungsten tailings, and the usage amount of the modified activating agent isonly 0.13%-0.18% much less than a usage amount of 15%-20% of a conventional solid activating agent; and 3, the process realizes on-line treatment of the tungsten tailings, avoids extraction from a tailings pond, reduces working processes such as loading and transportation, and reduces expenses.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and in particular relates to a process for preparing cement active admixture and concrete admixture with tungsten tailings. Background technique [0002] The mining industry is the basic industry of the economy, and economic and social development cannot be separated from the support of the mining industry. According to statistics, 90% of industrial products and 17% of consumer products in the world are produced from mineral raw materials. In contemporary China, the mining industry provides 95% of energy resources, 80% of raw materials, and more than 70% of agricultural production materials for national economic construction and social development. While the mining industry provides material guarantee for my country's economic development and industrialization construction, it also brings huge harm to the environment. Among them, the most notable is the tailings problem. There a...

AI Technical Summary

Problems solved by technology

[0005] 2. Pollution of the environment

Most ores need to be added with various agents during the sorting process, and these agents have a certain acidity and alkalinity and heavy metal ions, which will remain in the tailings and enter the tailings pond. It will seep down from the surface with rainwater and transform into the soil. , causing acidification, alkalization, and hardening of the nearby soil, and even flowing into rivers and lakes, causing serious pollution and damage to water bodies

In addition, during the transportation and treatment of tailings, harmful gas and dust pollution are also very serious

[0006] 3. There are potential safety hazards

In addition, the quicklime that needs to be added is about 15%-20%. Based on the calculation of 600,000 tons of tungsten tailings processed a year, about 105,000 tons of quicklime need to be transported from other places, which virtually increases the transportation cost.

[0010] 3. The tungsten tailings for the preparation of cement active admixtures and concrete admixtures need to be extracted from the tailings pond, and transported to the factory through construction machinery and vehicles, which virtually increases the production cost

Images