In order to implement the Water Law of the People's Republic of China and the Regulations on Water Conservation, further promote the high-quality development of water-saving industry, and enhance the supply capacity of water-saving products, technologies and services, a number of water-saving products, technologies and services have been developed. The National Development and Reform Commission of the People's Republic of China issued an announcement on soliciting public opinions on the Catalogue for the Guidance of Water-saving Industries and its Explanations (Draft for Soliciting Opinions). The time for soliciting public opinions is from November 28, 2025 to December 28, 2025. The explanations concerning the cement industry in the Guidance Catalogue
for Water-saving Industries (Draft for Soliciting Opinions) are as follows:
In the category of encouragement, water-saving in key areas of industrial water-saving and emission reduction includes water-saving in non-metallic mineral products. Specifically, in the production process of non-metallic mineral products such as cement, glass and ceramics, the water consumption in the production process is reduced by improving the production process, including the new dry cement production technology, ceramic dry pressing process, etc.; at the same time, the recycling of cooling water and cleaning water is strengthened, and the production wastewater is reused for batching, cooling and other processes after treatment.
In the elimination category, non-metallic mineral products in the industrial field include "cement machine shaft kiln, Lipol kiln, wet kiln", "brick and tile wheel kiln, shaft kiln, roof-less wheel kiln, horseshoe kiln and other earth kilns", "manual cutting aerated concrete production line, non-autoclaved aerated concrete production line". The details are as follows:
1. Cement mechanical shaft kiln, Lipol kiln and wet process kiln
. The shaft kiln is a vertical cement kiln. The kiln body is vertical and does not rotate. There are two kinds of shaft kilns: ordinary shaft kiln and mechanical shaft kiln. The Lipol kiln is a calcination system consisting of a rotary kiln and a heating machine. Wet kiln is a special rotary kiln equipment used in wet production process in cement industry, which produces clinker by calcining raw materials into slurry with water content of 32% -40%. Reasons for
elimination: water consumption is large, especially the wet kiln needs to make raw materials into slurry with water content of 32% -40%, and the water consumption per unit product is three times that of other processes.
Alternative technology: new dry process cement production kiln. Time limit for
elimination: It has been eliminated according to the Guidance Catalogue for Industrial Structure Adjustment (2024 Edition).
2. Brick and tile wheel kilns, vertical kilns, roof-less wheel kilns, horseshoe kilns and other earth
kilns. The main body of brick and tile wheel kilns is a circular tunnel structure. By adding fuel in sequence, the flame circulates along the kiln channel to achieve continuous firing of brick and tile bodies. The wheel kilns without kiln roof are called roof-less wheel kilns. The burning method of vertical kiln is to put the carbon block at the bottom of the brick stack to support the whole fuel, and the heat generated during the firing process is emitted outward through the adobe, so that the adobe is gradually sintered into bricks and tiles. The horseshoe kiln is named for the horseshoe-shaped return path of the flame, and its flame nozzle and exhaust gas outlet are arranged at the same end of the kiln body, forming a unique coordinated emission structure of combustion exhaust gas. Reasons for
elimination: The manufacturing process of bricks and tiles requires a large amount of water to adjust the humidity of raw materials, help shape and clean equipment. Modern brick and tile production enterprises can effectively reduce the consumption of water resources in the production process by improving the production process and equipment, as well as implementing water recovery and reuse systems.
Alternative technologies: tunnel kilns, etc. Time limit for
elimination: It has been eliminated according to the Guidance Catalogue for Industrial Structure Adjustment (2024 Edition).
3. Manual cutting aerated concrete production line and non-autoclaved curing aerated concrete production line
aerated concrete belongs to porous concrete in silicate concrete. The process flow is divided into: raw material preparation, reinforcement processing and reinforcement mesh (plate), batching, pouring, static stop, cutting, autoclaved curing, product inspection, packaging and other processes. Among them, manual cutting and non-autoclaved curing are two representative traditional methods in the production process of this kind of concrete. Reasons for
elimination: Manual cutting aerated concrete production line consumes more water than automatic cutting in the cutting process; the alternative technology of non-autoclaved aerated concrete production line is autoclaved aerated concrete production line, which can realize the recycling of water resources and effectively reduce the consumption of fresh water through the reuse of condensed water.
Alternative technologies: autoclaved aerated concrete production line, etc. Time limit for elimination: It has been eliminated according to the Guidance Catalogue for Industrial Structure Adjustment (2024 Edition).
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